154601911-vecu-manual-de-produccion-70312913.pdf
This document was uploaded by user and they confirmed that they have the permission to share it. If you are author or own the copyright of this book, please report to us by using this DMCA report form. Report DMCA
Overview
Download & View 154601911-vecu-manual-de-produccion-70312913.pdf as PDF for free.
More details
- Words: 5,978
- Pages: 33
Production Manual Volvo Buses Control Unit, VECU (Vehicle Electronical Control Unit) Issue 2
P
Preface The description and instructions in this manual are based on design and method studies placed until July 2000 The products are under continues development. Vehicles and components produced after the above date may therefore have different specifications and methods. When this is judged to have significant bearing on this manual, updates will be made to cover changes. The new edition of this manual will update the changes. The following levels of observation, caution and warning are used in this documentation: Note! Indicates a situation, handling or circumstance which should be observed. Important! Indicates a situation, handling or circumstance which should be emphasized so as not to lead to personal injury or damage to property. Caution! Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury or damage to property. Warning! Indicates a potentially hazardous situation which, if not avoided, could result in death, serious injury or damage to property. Danger! Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.
Volvo Bus Corporation Gothenburg, Sweden
Part number: 70312913 © Volvo Bus Corporation, Gothenburg All rights reserved. No parts of this publication may be reproduced, stored in retrieval system, or transmitted in any forms by any means, electronic, mechanical, photocopying, recording or otherwise, without prior written permission of Volvo Bus Corporation.
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
3
Table of contents Abbreviations ......................................................................................... 4 1.0
Vehicle Electronical Control Unit, VECU .............................................5 1.1 1.2 1.3 1.4 1.5
2.0
Tests ......................................................................................................10 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 2.10 2.11 2.12 2.13 2.14 2.15 2.16 2.17 2.18 2.19 2.20
SW Production Preparation Dept 80643
General, control unit ........................................................................................5 VECU functions ...............................................................................................6 Block diagram for VECU ................................................................................8 General, tests ....................................................................................................9 Software ...........................................................................................................9 General, test performance ..............................................................................10 Read faultcodes ..............................................................................................11 Reset faultcodes .............................................................................................12 Test of key switch with or without preheating ...............................................13 Test of startbutton with preheat or without ....................................................14 Test of EOL (End Of Line) ............................................................................15 Test, voltage of battery ...................................................................................16 Test of cruise control ......................................................................................17 Test of windshield wipers and washer ...........................................................18 Test of windshield wiper interval ...................................................................19 Test of vehicle speed sensor ...........................................................................21 Test of accelerator pedal ................................................................................22 Test of parking brake switch ..........................................................................23 Retarder lever .................................................................................................24 Brake pressure switch ....................................................................................26 Brake pedal switch .........................................................................................27 Clutch pedal switch ........................................................................................28 Brake light, retarder .......................................................................................29 Status Microswitch Clutch, Test ....................................................................30 Status Microswitch Brake, Test .....................................................................31
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
4
Abbreviations The abbreviations used in this manual are explained in the table below:
SW Production Preparation Dept 80643
Abbreviation
Description
CC
Cruise Control
EBR
Engine Brake
EECU
Engine Electronic Control Unit
EOL
End Of Line
EPG
Exhaust Power Gate
FMI
Failure Mode Identifier
IS
Idle Switch
MID
Message Identification Description
VEB
Volvo Engine Brake
VECU
Vehicle Electronical Control Unit
VISP
Vehicle Inspection by System Parameters
IVS1
Idle Valve Switch 1
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
Vehicle Electronical Control Unit, VECU
5
1.0 Vehicle Electronical Control Unit, VECU 1.1 General, control unit The MID number for the vehicle (VECU) is 144. The main function of the VECU is to gather data from the different driver controls inside the bus, and send them on to the other control units in the system, mainly to the EECU. VECU also has some built-in functions, that used to be handled by the combination relay. The vehicle control unit is connected to both the control link (SAE J1939) and the information link (SAE J1587). VECU is often installed beneath the dashboard.
14XX001
Figure 1. The picture displays where the different control units may be mounted. Depending on model and variant of the bus, the location of the control units may differ. 1. Instrument cluster and display (BIC), MID 140 and 234 2. Vehicle control unit (VECU), MID 144 3. Control unit for chassis (CECM), MID164 4. Input/Output A Module(s) 5. Control unit for brake system (ABS), MID 136 6. Electronically Controlled Suspension (ECS) 7. Pusher control unit (PCU, only for articulated variants) 8. Transmission electronical control unit (TECU) ZF/Voith, MID 130 9. Electronical engine control unit (EECU), MID 128
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
6
Vehicle Electronical Control Unit, VECU
.
14XX002
Figure 2. The VECU.
1.2 VECU functions These are the VECU functions. • Accelerator pedal The signals from the accelerator pedal are sent to VECU, and then further on to the EECU via the control link. If there is an open circuit in the control link, the signals from the accelerator pedal will be sent on the information link to the EECU. The EECU control unit has an emergency function, that makes it possible for the bus to be driven with reduced speed, in case of an open circuit in both data links. In that case it is the idle valve switch that handles the acceleration. The idle switch is connected to the EECU with a separate connection, and it will indicate if the accelerator pedal is in idle position or driving position. • Cruise control and Redundant brake switch The cruise control is operated by a four function control switch located at the lever on the left side of the steering wheel. When braking the redundant brake switch is set and cruise control is inhibited. • Vehicle speed The vehicle speed signal is sent from a sensor on the gearbox. Depending on the variant of the bus, such as if the bus has a tachograph or a speedometer, the transfer and the processing of the signal differs. Tachograph The signal is transferred via a separate connection that is sealed to the tachograph. The tachograph then sends a frequency signal to the VECU wich forwards the message to both data links. Speedometer (without tachograph)
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
Vehicle Electronical Control Unit, VECU
7
The supply voltage for the sensor on the gearbox comes from the instrument cluster. The signal (vehicle speed) is sent from the sensor via a separate connection to the VECU wich forwards the message to both data links. The speedometer then receives the signal from the information link. • Increased idling speed This function can be controlled by VECU. • Key switch/start button VECU controls the function of the key switch/start button for the EECU, and the preheating function. • Engine and exhaust brake VECU controls the exhaust brake and the engine brake. • Windshield wiper VECU controls the interval- and wiper function during wash of the windshield. • Hand retarder Auxiliary brake system, controlled by a five function control switch at a special lever. • Foot retarder (and brake pedal control) Auxiliary brake system controlled by a potentionmeter built into the brake pedal. By setting the brake pedal control switch, the function is disabled. • Engine torque limit 1 A digital input used to create an engine torque reduction message. Used in articulated applications. • Engine torque limit 2 A digital input used to create an engine torque reduction message. Used in articulated applications. • Engine speed limit A digital input used to create a message to the engine regarding speedlimit. Used in articulated applications to get idle speed in certain conditions.
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
8
Vehicle Electronical Control Unit, VECU
1.3 Block diagram for VECU The block diagrams in this manual are general. If there are any differences between the block diagram and the wiring diagram, the wiring diagram is valid. Figure 3.
14XX003
Figure 4. The figure shows the block diagram for 24 V supply voltage.
In the texts for operator, timeout and evaluation, you are able to see which connection is being tested. Example: CC: SET+ SIGNAL IS LOW, VECUPA2 Explanation: In this test, the signal on connection PA2 (cruise control SET+) is too low. Probable cause: An open circuit.
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
Vehicle Electronical Control Unit, VECU
9
1.4 General, tests You must perform a number of tests to ensure that the control system for VECU is correctly mounted.
1.5 Software The software used for testing the control unit is VISP (Vehicle Inspection by System Parameters).
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
10
Tests
2.0 Tests 2.1 General, test performance The sequence for the tests is decided when the settings for each workstation is being performed. The sequence described in this manual is not predetermined, it is just a brief explanation of each test available in VISP. In the description of each test, the phrase “instructions shown on the screen” means that the operator receives instructions from the VISP-program on the computer screen.
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
Tests
11
2.2 Read faultcodes VISP reads possible faultcodes and displays them on the screen. 2.2.1 Text for the operator The following text is shown on the screen: • Read FMI, VECU Explanation: VISP reads the faultcodes that are set in the VECU.
14XX007 Figure 5. The picture shows the computer screen information.
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
12
Tests
2.3 Reset faultcodes VISP resets the faultcodes that may occur in the control unit. This test is automatically performed by VISP, the operator does not have to do anything during the test. When the ECU resets error codes, it only resets them from the RAM-memory. If the error codes are to be reset permanently, the non-volatile memory must be reset. This will be done when the key switch is turned off. The reset will take a few seconds. Note! If the main power switch is turned off before the key switch, the error codes will still be in the non-volatile memory. Therefore the operator needs to turn off the keyswitch for a few seconds (after error codes have been reset) before the main power is turned off. 2.3.1 Text for the operator The following instruction is shown on the screen: • Reset FMI, VECU Explanation: VISP resets the faultcodes from the VECU.
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
Tests
13
2.4 Test of key switch with or without preheating In this test, VISP checks that the key switch is connected to the vehicle control unit. If the bus is equipped with preheating, the operator receives three instructions on the screen. The first is to turn the key switch to preheat position and hold it there. The second instruction asks the operator to turn the key to start position and hold it there. Finally the operator is asked to release the key and the test is done. If the bus is not equipped with preheating the first step, turn key to preheat, is left out. 2.4.1 Texts for the operator The following instructions are shown on the screen: • Turn key to preheat & hold This text is shown only for buses with preheating function. Instruction: The operator shall turn the key switch to preheating position and hold it there. • Turn key to start & hold Instruction: The operator shall turn the key switch to start position and hold it there. • Release key Instruction: The operator shall release the key switch. 2.4.2 Texts shown if time-out has occurred The following texts are shown on the screen if time-out has occurred: • Key switch preheat signal is low, VECUPA7 Explanation: The signal from connection PA7 (key switch at preheat position) is too low. Probable cause: An open circuit. • Key switch start signal is low, VECUPA6 Explanation: The signal from connection PA6 (key switch at start position) is too low. Probable cause: An open circuit. • Key switch start or preheat signal is high, VECUPA6, VECUPA7 Explanation: One of the signals from connection PA6 or PA7 (key switch preheat or start position) is too high. Probable cause: Defective switch.
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
14
Tests
2.5 Test of startbutton with preheat or without In this test VISP checks that the startbutton and the preheating switch is connected to the vehicle control unit. If the bus is equipped with preheat, the operator receives three instructions on the screen. The first is to turn the feed switch to position C and hold it in place. The second instruction asks the operator to push the start button and hold it in place. Finally the operator is asked to release the button and the test is done. If the bus is not equipped with preheating the first step, turn key to preheat, is left out. 2.5.1 Texts for the operator The following instructions are shown on the screen: • Activate preheat This text is shown only for buses with preheating function. Instruction: The operator shall turn the feed switch to position C. • Push start button Instruction: The operator shall push the start button. • Release start button Instruction: The operator shall release the start button. 2.5.2 Texts shown if time-out has occurred The following texts are shown on the screen if time-out has occurred: • Preheat signal is low, VECUPA7 Explanation: The signal on connection PA7 (preheating signal) is low. Probable cause: A defective switch. • Start signal is low, VECUPA6 Explanation: The signal on connection PA6 (start signal) is low. Probable cause: A defective switch. • Preheat or startsignal is high, VECUPA6, VECUPA7 Explanation: The signal on connection PA6 or PA7 (preheat or startsignal) is high. Probable cause: A defective switch.
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
Tests
15
2.6 Test of EOL (End Of Line) This is an automatic test performed by VISP. The program checks that the EOL connection is not connected to battery voltage. The operator does not have to do anything during this test. 2.6.1 Text for the operator The following instruction is shown on the screen: • Automatic EOL test Explanation: VISP checks that the EOL connection is not connected to battery voltage. 2.6.2 Text shown if time-out has occurred The following text is shown on the screen if time-out has occurred: • EOL signal is high, VECUPA22 Explanation: The EOL-signal is too high (connection PA22). Probable cause: The connection is connected to battery voltage.
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
16
Tests
2.7 Test, voltage of battery This is a voltage test for 24 V batteries performed by VISP. VISP checks that the supply voltage from the battery to the vehicle control unit is correct. The supply voltage should be between the limit 20-30 V. The operator does not have to do anything during this test. 2.7.1 Text for the operator The following instruction is shown on the screen: • Automatic vecu voltage test Explanation: VISP checks that the supply voltage to the vehicle control is correct. 2.7.2 Texts shown if time-out has occurred The following texts are shown on the screen if time-out has occurred: • Battery voltage is lower than 20 V, VECUPA13, VECUPA12 Explanation: The battery voltage is lower than 20 V, which is the lowest voltage limit. Probable cause: The battery is not giving a correct supply voltage or the control unit is defective. If there is something wrong with the control unit it may interpret the supply voltage as incorrect. • Battery voltage is higher than 30 V, VECUPA13, VECUPA12 Explanation: The battery voltage is higher than 30 V which is the highest voltage limit. Probable cause: The battery is not giving a correct supply voltage or the control unit is defective. If there is something wrong with the control unit it may interpret the supply voltage as incorrect.
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
Tests
17
2.8 Test of cruise control In this test, VISP checks that the buttons for the cruise control are correctly connected to the vehicle control unit. The cruise control is located on the same lever as the signals for indicators and headlight. The operator receives four instructions on the screen. The first instruction is to press the button SET+. The second instruction is to press the button SET-. The third one tells the operator to press Resume. Finally the operator shall turn off the cruise control. 2.8.1 Texts for the operator The following instructions are shown on the screen: • Press cruise control set+ & hold Instruction: The operator shall press down and hold the button SET+. • Press cruise control set- & hold Instruction: The operator shall press down and hold the button SET-. • Press cruise control resume & hold Instruction: The operator shall press down and hold the button RESUME. • Turn off cruise control Instruction: The operator shall turn off the cruise control. 2.8.2 Texts shown if time-out has occurred The following texts are shown on the screen if time-out has occurred: • CC: set+ signal is low, VECUPA2 Explanation: The signal on connection PA2 (cruise control SET+) is too low. Probable cause: An open circuit. • CC: set- signal is low, VECUPA1 Explanation: The signal on connection PA1 (cruise control SET-) is too low. Probable cause: An open circuit. • CC: Resume or on/off signal is low, VECUPA30, VECUPA3 Explanation: The signal on connection PA30 or PA3 (cruise control RESUME or ON/OFF) is too low. Probable cause: The error may be caused by an open circuit. • CC: Resume or on/off signal is high, VECUPA30, VECUPA3 Explanation: The signal on connection PA30 or PA3 (cruise control RESUME or ON/OFF) is too high. Probable cause: A defective switch or short circuit to voltage.
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
18
Tests
2.9 Test of windshield wipers and washer VISP checks that the switch for the windshield wipers and washer, are correctly connected to the vehicle control unit.
14XX005
Figure 6. The function Wash/Wipe is located at the control lever.
The operator receives instructions on the screen to pull the lever Wash/Wipe. The lever shall be held in position until the operator receives instructions to release it. 2.9.1 Texts for the operator The following instructions are shown on the screen: • Pull wash/wipe & hold Instruction: The operator shall pull the lever for windshield wipers and washer towards one and hold it there. • Release wash/wipe Instruction: The operator shall release the lever. 2.9.2 Texts shown if time-out has occurred The following texts are shown on the screen if time-out occures during the test: • Wash & wipe signal is low, VECUPA11 Explanation: The signal on connection PA11 (windshield wipers and washer) is too low. Probable cause: An open circuit. • Wash & wipe signal is high, VECUPA11 Explanation: The signal on connection PA11 (windshield wipers and washer) is too high. Probable cause: A defective switch or shortcircuit to voltage.
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
Tests
19
2.10 Test of windshield wiper interval VISP checks that the interval switch for the windshield wipers, the interval relay and the input signal to the hold circuit are correctly connected to the vehicle control unit.
14XX006
Figure 7. By moving the lever upwards, the interval for the windshield wipers is activated.
The operator receives instructions on the screen, to activate the interval for the windshield wipers by moving the lever upwards. After a short while the operator recieves instructions to turn off the interval. 2.10.1 Texts for the operator The following instructions are shown on the screen: • Turn on wiper interval Instruction: The operator shall activate the interval for the windshield wipers by moving the lever upwards. • Turn off wiper interval Instruction: The operator shall turn off the interval for the windshield wipers. 2.10.2 Texts shown if time-out has occurred The following texts are shown on the screen if time-out has occurred: • Wiper interval signal is low, VECUPA10 Explanation: The signal on connection PA10 (the interval for the windshield wipers) is too low. Probable cause: An open circuit. • Interval relay output is low, VECUPB16 Explanation: The signal on connection PB16 (output signal for the interval relay) is too low. Probable cause: An open circuit.
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
20
Tests
• Hold circuit wiper signal is low, VECUPA9 Explanation: The signal on connection PA9 (the hold circuit for the windshield wipers) is too low. Probable cause: An open circuit. • Wiper interval signal is high, VECUPA10 Explanation: The signal on connection PA10 (interval for the windshield wipers) is too high. Probable cause: A defective switch or shortcircuit to voltage. • Interval relay output is high, VECUPB16 Explanation: The signal on connection PB16 (output for the interval relay) is too high. Probable cause: A defective switch or shortcircuit to voltage. • Hold circuit wiper signal is high, VECUPA9 Explanation: The signal on connection PA9 (hold circuit for the windshield wipers) is too high. Probable cause: A defective switch or shortcircuit to voltage.
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
Tests
21
2.11 Test of vehicle speed sensor This is an automatic test performed by VISP. The program checks that the vehicle speed sensor is connected to the vehicle control unit. The operator does not have to do anything during this test. 2.11.1 Text for the operator The following instruction is shown on the screen: • Automatic vehicle speed sensor test Explanation: VISP checks the vehicle speed sensor. 2.11.2 Text shown if time-out has occurred The following text is shown on the screen if time-out has occurred: • Speed is not zero (PID84>0), VECUPB6, VECUPB20 Explanation: The vehicle’s speed is not zero this means that the value on the signals (connections PB6 and PB20) is not zero. The vehicle speed sensor receives voltage impulses, even though the bus is standing still.
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
22
Tests
2.12 Test of accelerator pedal VISP checks that the accelerator pedal and the idle switch are connected to the control unit. During the test, the operator receives two instructions on the screen. The first instruction is to press the accelerator pedal to the floor. The second instruction is to release the accelerator pedal. 2.12.1 Texts for the operator The following instructions are shown on the screen: • Press accelerator pedal to maximum position Instruction: The operator shall press the accelerator pedal to the floor. • Release accelerator pedal Instruction: The operator shall release the accelerator pedal. 2.12.2 Texts shown if time-out has occurred Accelerator pedal and idle switch The following texts are shown on the screen if time-out has occurred: • Too low throttle signal (PID91 < 100%), VECUPB8 Explanation: The signal on the connection PB8 (accelerator pedal) is too low. Probable cause: The error may be caused by an open circuit. • Buffered idle switch output (is) signal is low, VECUPB17 Explanation: The signal on connection PB17 (the buffered output signal for idle witch) is too low. Probable cause: An open circuit. • TOO HIGH THROTTLE SIGNAL (PID91 > 0%), VECUPB8 Explanation: The signal on connection PB8 (accelerator pedal) is too high. Probable cause: A defective switch or shortcircuit to voltage. • BUFFERED IDLE SWITCH OUTPUT (IVS) SIGNAL IS HIGH, VECUPB17 Explanation: The signal on connection PB17 (the buffered output signal for the idle switch) is too high. Probable cause: The error may be caused by a defective switch or shortcircuit to voltage.
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
Tests
23
2.13 Test of parking brake switch In this test VISP checks that the switch for the parking brake is connected to the vehicle control unit. Two instructions are shown on the screen. The first one tells the operator to pull the parking brake. The second instruction tells the operator to release the parking brake. 2.13.1 Texts for the operator The following instructions are shown on the screen: • Pull parking brake & hold Instruction: The operator shall pull the parking brake and hold it in position until next instruction is shown on the screen. • Release parking brake Instruction: The operator shall release the parking brake. 2.13.2 Texts shown if time-out has occurred The following texts are shown on the screen if time-out has occurred: • Parking brake signal is low, VECU PB11 Explanation: The signal on connection PB11 (parking brake) is too low. Probable cause: A defective switch or an incorrect input signal. • Parking brake signal is high, VECU PB11 Explanation: The signal on connection PB11 (parking brake) is too high. Probable cause: A defective switch or an incorrect input signal.
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
24
Tests
2.14 Retarder lever The retarde lever test checks that the retarder lever is connected to the VECU. Reading the status of Ppid 68 2.14.1 Texts for the operator The following instructions are shown on the screen: • Set retarder lever in OFF position Instruction: The operator shall set the retarder lever in OFF position. • Set retarder lever in AUTO position Instruction: The operator shall set the retarder lever in AUTO position. • Set retarder lever in position 1 Instruction: The operator shall set the retarder lever in position 1. • Set retarder lever in position 2 Instruction: The operator shall set the retarder lever in position 2. • Set retarder lever in position 3 Instruction: The operator shall set the retarder lever in position 3. • Set retarder lever in position 4 Instruction: The operator shall set the retarder lever in position 4. 2.14.2 Texts shown if time-out has occurred The following texts are shown on the screen if timeout has occurred: • Retarder lever is not in OFF pos, VECU PB24 Explanation: The operator has not set the retarder lever in OFF position. Probable cause: No connection and shortcuts are detected. • Retarder lever is not in AUTO pos, VECU PB24 Explanation: The operator has not set the retarder lever in AUTO position. Probable cause: No connection and shortcuts are detected. • Retarder lever is not in 1:th pos, VECU PB24 Explanation: The operator has not set the retarder lever in position 1. Probable cause: No connection and shortcuts are detected. • Retarder lever is not in 2:nd pos, VECU PB24 Explanation: The operator has not set the retarder lever in position 2. Probable cause: No connection and shortcuts are detected. • Retarder lever is not in 3:rd pos, VECU PB24 Explanation: The operator has not set the retarder lever in position 3. Probable cause: No connection and shortcuts are detected. • Retarder lever is not in 4:th pos, VECU PB24 SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
Tests
25
Explanation: The operator has not set the retarder lever in position 4. Probable cause: No connection and shortcuts are detected.
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
26
Tests
2.15 Brake pressure switch The brake pressure switch test checks that the brake pressure switch is connected to the VECU. Reading the status of Ppid 85 while asking the operator to press he brake pedal to the floor. After that the status of Ppid 85 has changed to 1 the operator is asked to release it. The status of Ppid 85 is read again and it should be 0. 2.15.1 Texts for the operator The following instructions are shown on the screen: • Press brake pedal & hold Instruction: The operator press the parking brake and hold it in position until next instruction is shown on the screen. • Release brake pedal Instruction: The operator shall release the brake. 2.15.2 Texts shown if time-out has occurred The following texts are shown on the screen if time-out has occurred: • Brake pressure signal low, VECU PB27 Explanation: Incorrect input signal Probable cause: Faulty switch, no connection and shortcuts are detected. • Brake pressure signal high, VECU PB27 Explanation: Incorrect input signal Probable cause: Faulty switch, no connection and shortcuts are detected.
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
Tests
27
2.16 Brake pedal switch The brake pedal switch test checks that the brake pedal switch is connected to the VECU. Reading the status of Ppid 85 while asking the operator to press he brake pedal to the floor. After that the status of Ppid 85 has changed to 1 the operator is asked to release it. The status of Ppid 85 is read again and it should be 0. 2.16.1 Texts for the operator The following instructions are shown on the screen: • Press brake pedal & hold Instruction: The operator press the parking brake and hold it in position until next instruction is shown on the screen. • Release brake pedal Instruction: The operator shall release the brake. 2.16.2 Texts shown if time-out has occurred The following texts are shown on the screen if time-out has occurred: • Redundant brake signal is low, VECU PA5 Explanation: The operator has forgot to press down the brake pedal or there is an incorrect input signal. Probable cause: Faulty switch/cable/connector is detected. • Redundant brake signal is high, VECU PA5 Explanation: The operator has forgot to release the brake pedal or there is an incorrect input signal. Probable cause: Faulty switch/cable/connector is detected.
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
28
Tests
2.17 Clutch pedal switch The clutch pedal switch test checks that the clutch pedal switch is connected to the VECU. Reading the status of pid 85 while asking the operator to press he clutch pedal to the floor. After that the status of pid 85 has changed to 1 the operator is asked to release it. The status of pid 85 is read again and it should be 0. 2.17.1 Texts for the operator The following instructions are shown on the screen: • Press clutch & hold Instruction: The operator press the clutch and hold it in position until next instruction is shown on the screen. • Release clutch Instruction: The operator shall release the clutch. 2.17.2 Texts shown if time-out has occurred The following texts are shown on the screen if time-out has occurred: • Clutch signal is low, VECU PA8 Explanation: The operator has forgot to press down the brake pedal or there is an incorrect input signal. Probable cause: No connection and shortcuts are detected. • Clutch signal is high, VECU PA8 Explanation: The operator has forgot to release the brake pedal or there is an incorrect input signal. Probable cause: No connection and shortcuts are detected.
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
Tests
29
2.18 Brake light, retarder The brake light retarder test checks that the brake light output PB1 on the VECU is working. Reads the status of Ppid 76. The operator must press F8 if the lights are on. After that the output PB1 is turned off. 2.18.1 Texts for the operator The following instructions are shown on the screen: • Brake light test (retarder) Instruction: VISP ignites the retarder lamp. • Is the brake light on? Instruction: The operator must confirm that the lamp is lit. He must press F8 if the lights are on. 2.18.2 Texts shown if time-out has occurred The following texts are shown on the screen if time-out has occurred: • Not possible to turn on output brake light, VECU PB1 Explanation: VISP can not turn the light on. Probable cause: No connection and shortcircuits are detected. Faulty output is detected. • Not possible to turn off output brake light, VECU PB1 Explanation: VISP can not turn the light off. Probable cause:No connection and shortcircuits are detected. Faulty output is detected. • Not possible to log out Explanation: VISP can not log out. Probable cause:No connection and shortcircuits are detected. Faulty output is detected. • You have not pressed YES (F8) or NO (F5) Explanation: The operator has not confirmed. Probable cause: The operator may have ignored to confirm or he may have been to late for time out. 2.18.3 Evaluation results This is the evaluation result from the test: • The brake light was not on when activating the brake light (retarder), Pin PB1 No connection and shortcircuits are detected. Faulty output is detected. The lamp can be broken.
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
30
Tests
2.19 Status Microswitch Clutch, Test This is a automatic test that checks the clutch´s microswitch when unactivated. Reading the status of Pid 85. 2.19.1 Texts for the operator The following instructions are shown on the screen: • Status microswitch clutch Instruction: VISP checks that the status of the microswitch clutch is correct. 2.19.2 Texts shown if time-out has occurred The following texts are shown on the screen if time-out has occurred: • Clutch signal is high, VECU PA8 Explanation: Incorrect input signal. Probable cause: No connection and shortcuts are detected. • Clutch signal is low, VECU PA8 Explanation: Incorrect input signal. Probable cause: No connection and shortcuts are detected.
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
Tests
31
2.20 Status Microswitch Brake, Test This is a automatic test that checks the brake pedals microswitch when unactivated. Reading the status of Ppid85. 2.20.1 Texts for the operator The following instructions are shown on the screen: • Status microswitch brake Instruction: VISP checks that the status of the microswitch brake is correct. 2.20.2 Texts shown if time-out has occurred The following texts are shown on the screen if time-out has occurred: • Redundant brake signal is high, VECU PA5 Explanation: Incorrect input signal. Probable cause: No connection and shortcuts are detected. • Redundant brake signal is low, VECU PA5 Explanation: Incorrect input signal. Probable cause: No connection and shortcuts are detected.
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
Feedback One of our objectives is that production personnel should have access to correct and appropriate production manuals. In order to maintain the high standard of our literature, your opinions and experience when using this manual would be greatly appreciated. If you have any comments or suggestions, make a copy of this page, write down your comments and send them to the address below.
To:
From:
Volvo Bus Corporation
...........................................................................
Dept. Software Processes 80 643
...........................................................................
S-405 08 Gothenburg
...........................................................................
SWEDEN
........................................................................... ........................................................................... ...........................................................................
Comments and proposals concerning manual:
Control Unit, VECU (Vehicle Electronical Control Unit), Issue 2
............................................................................................................................................................... ............................................................................................................................................................... ............................................................................................................................................................... ............................................................................................................................................................... ............................................................................................................................................................... ............................................................................................................................................................... ............................................................................................................................................................. . ................................................................................................................................................. .............
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
P
Preface The description and instructions in this manual are based on design and method studies placed until July 2000 The products are under continues development. Vehicles and components produced after the above date may therefore have different specifications and methods. When this is judged to have significant bearing on this manual, updates will be made to cover changes. The new edition of this manual will update the changes. The following levels of observation, caution and warning are used in this documentation: Note! Indicates a situation, handling or circumstance which should be observed. Important! Indicates a situation, handling or circumstance which should be emphasized so as not to lead to personal injury or damage to property. Caution! Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury or damage to property. Warning! Indicates a potentially hazardous situation which, if not avoided, could result in death, serious injury or damage to property. Danger! Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.
Volvo Bus Corporation Gothenburg, Sweden
Part number: 70312913 © Volvo Bus Corporation, Gothenburg All rights reserved. No parts of this publication may be reproduced, stored in retrieval system, or transmitted in any forms by any means, electronic, mechanical, photocopying, recording or otherwise, without prior written permission of Volvo Bus Corporation.
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
3
Table of contents Abbreviations ......................................................................................... 4 1.0
Vehicle Electronical Control Unit, VECU .............................................5 1.1 1.2 1.3 1.4 1.5
2.0
Tests ......................................................................................................10 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 2.10 2.11 2.12 2.13 2.14 2.15 2.16 2.17 2.18 2.19 2.20
SW Production Preparation Dept 80643
General, control unit ........................................................................................5 VECU functions ...............................................................................................6 Block diagram for VECU ................................................................................8 General, tests ....................................................................................................9 Software ...........................................................................................................9 General, test performance ..............................................................................10 Read faultcodes ..............................................................................................11 Reset faultcodes .............................................................................................12 Test of key switch with or without preheating ...............................................13 Test of startbutton with preheat or without ....................................................14 Test of EOL (End Of Line) ............................................................................15 Test, voltage of battery ...................................................................................16 Test of cruise control ......................................................................................17 Test of windshield wipers and washer ...........................................................18 Test of windshield wiper interval ...................................................................19 Test of vehicle speed sensor ...........................................................................21 Test of accelerator pedal ................................................................................22 Test of parking brake switch ..........................................................................23 Retarder lever .................................................................................................24 Brake pressure switch ....................................................................................26 Brake pedal switch .........................................................................................27 Clutch pedal switch ........................................................................................28 Brake light, retarder .......................................................................................29 Status Microswitch Clutch, Test ....................................................................30 Status Microswitch Brake, Test .....................................................................31
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
4
Abbreviations The abbreviations used in this manual are explained in the table below:
SW Production Preparation Dept 80643
Abbreviation
Description
CC
Cruise Control
EBR
Engine Brake
EECU
Engine Electronic Control Unit
EOL
End Of Line
EPG
Exhaust Power Gate
FMI
Failure Mode Identifier
IS
Idle Switch
MID
Message Identification Description
VEB
Volvo Engine Brake
VECU
Vehicle Electronical Control Unit
VISP
Vehicle Inspection by System Parameters
IVS1
Idle Valve Switch 1
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
Vehicle Electronical Control Unit, VECU
5
1.0 Vehicle Electronical Control Unit, VECU 1.1 General, control unit The MID number for the vehicle (VECU) is 144. The main function of the VECU is to gather data from the different driver controls inside the bus, and send them on to the other control units in the system, mainly to the EECU. VECU also has some built-in functions, that used to be handled by the combination relay. The vehicle control unit is connected to both the control link (SAE J1939) and the information link (SAE J1587). VECU is often installed beneath the dashboard.
14XX001
Figure 1. The picture displays where the different control units may be mounted. Depending on model and variant of the bus, the location of the control units may differ. 1. Instrument cluster and display (BIC), MID 140 and 234 2. Vehicle control unit (VECU), MID 144 3. Control unit for chassis (CECM), MID164 4. Input/Output A Module(s) 5. Control unit for brake system (ABS), MID 136 6. Electronically Controlled Suspension (ECS) 7. Pusher control unit (PCU, only for articulated variants) 8. Transmission electronical control unit (TECU) ZF/Voith, MID 130 9. Electronical engine control unit (EECU), MID 128
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
6
Vehicle Electronical Control Unit, VECU
.
14XX002
Figure 2. The VECU.
1.2 VECU functions These are the VECU functions. • Accelerator pedal The signals from the accelerator pedal are sent to VECU, and then further on to the EECU via the control link. If there is an open circuit in the control link, the signals from the accelerator pedal will be sent on the information link to the EECU. The EECU control unit has an emergency function, that makes it possible for the bus to be driven with reduced speed, in case of an open circuit in both data links. In that case it is the idle valve switch that handles the acceleration. The idle switch is connected to the EECU with a separate connection, and it will indicate if the accelerator pedal is in idle position or driving position. • Cruise control and Redundant brake switch The cruise control is operated by a four function control switch located at the lever on the left side of the steering wheel. When braking the redundant brake switch is set and cruise control is inhibited. • Vehicle speed The vehicle speed signal is sent from a sensor on the gearbox. Depending on the variant of the bus, such as if the bus has a tachograph or a speedometer, the transfer and the processing of the signal differs. Tachograph The signal is transferred via a separate connection that is sealed to the tachograph. The tachograph then sends a frequency signal to the VECU wich forwards the message to both data links. Speedometer (without tachograph)
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
Vehicle Electronical Control Unit, VECU
7
The supply voltage for the sensor on the gearbox comes from the instrument cluster. The signal (vehicle speed) is sent from the sensor via a separate connection to the VECU wich forwards the message to both data links. The speedometer then receives the signal from the information link. • Increased idling speed This function can be controlled by VECU. • Key switch/start button VECU controls the function of the key switch/start button for the EECU, and the preheating function. • Engine and exhaust brake VECU controls the exhaust brake and the engine brake. • Windshield wiper VECU controls the interval- and wiper function during wash of the windshield. • Hand retarder Auxiliary brake system, controlled by a five function control switch at a special lever. • Foot retarder (and brake pedal control) Auxiliary brake system controlled by a potentionmeter built into the brake pedal. By setting the brake pedal control switch, the function is disabled. • Engine torque limit 1 A digital input used to create an engine torque reduction message. Used in articulated applications. • Engine torque limit 2 A digital input used to create an engine torque reduction message. Used in articulated applications. • Engine speed limit A digital input used to create a message to the engine regarding speedlimit. Used in articulated applications to get idle speed in certain conditions.
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
8
Vehicle Electronical Control Unit, VECU
1.3 Block diagram for VECU The block diagrams in this manual are general. If there are any differences between the block diagram and the wiring diagram, the wiring diagram is valid. Figure 3.
14XX003
Figure 4. The figure shows the block diagram for 24 V supply voltage.
In the texts for operator, timeout and evaluation, you are able to see which connection is being tested. Example: CC: SET+ SIGNAL IS LOW, VECUPA2 Explanation: In this test, the signal on connection PA2 (cruise control SET+) is too low. Probable cause: An open circuit.
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
Vehicle Electronical Control Unit, VECU
9
1.4 General, tests You must perform a number of tests to ensure that the control system for VECU is correctly mounted.
1.5 Software The software used for testing the control unit is VISP (Vehicle Inspection by System Parameters).
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
10
Tests
2.0 Tests 2.1 General, test performance The sequence for the tests is decided when the settings for each workstation is being performed. The sequence described in this manual is not predetermined, it is just a brief explanation of each test available in VISP. In the description of each test, the phrase “instructions shown on the screen” means that the operator receives instructions from the VISP-program on the computer screen.
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
Tests
11
2.2 Read faultcodes VISP reads possible faultcodes and displays them on the screen. 2.2.1 Text for the operator The following text is shown on the screen: • Read FMI, VECU Explanation: VISP reads the faultcodes that are set in the VECU.
14XX007 Figure 5. The picture shows the computer screen information.
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
12
Tests
2.3 Reset faultcodes VISP resets the faultcodes that may occur in the control unit. This test is automatically performed by VISP, the operator does not have to do anything during the test. When the ECU resets error codes, it only resets them from the RAM-memory. If the error codes are to be reset permanently, the non-volatile memory must be reset. This will be done when the key switch is turned off. The reset will take a few seconds. Note! If the main power switch is turned off before the key switch, the error codes will still be in the non-volatile memory. Therefore the operator needs to turn off the keyswitch for a few seconds (after error codes have been reset) before the main power is turned off. 2.3.1 Text for the operator The following instruction is shown on the screen: • Reset FMI, VECU Explanation: VISP resets the faultcodes from the VECU.
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
Tests
13
2.4 Test of key switch with or without preheating In this test, VISP checks that the key switch is connected to the vehicle control unit. If the bus is equipped with preheating, the operator receives three instructions on the screen. The first is to turn the key switch to preheat position and hold it there. The second instruction asks the operator to turn the key to start position and hold it there. Finally the operator is asked to release the key and the test is done. If the bus is not equipped with preheating the first step, turn key to preheat, is left out. 2.4.1 Texts for the operator The following instructions are shown on the screen: • Turn key to preheat & hold This text is shown only for buses with preheating function. Instruction: The operator shall turn the key switch to preheating position and hold it there. • Turn key to start & hold Instruction: The operator shall turn the key switch to start position and hold it there. • Release key Instruction: The operator shall release the key switch. 2.4.2 Texts shown if time-out has occurred The following texts are shown on the screen if time-out has occurred: • Key switch preheat signal is low, VECUPA7 Explanation: The signal from connection PA7 (key switch at preheat position) is too low. Probable cause: An open circuit. • Key switch start signal is low, VECUPA6 Explanation: The signal from connection PA6 (key switch at start position) is too low. Probable cause: An open circuit. • Key switch start or preheat signal is high, VECUPA6, VECUPA7 Explanation: One of the signals from connection PA6 or PA7 (key switch preheat or start position) is too high. Probable cause: Defective switch.
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
14
Tests
2.5 Test of startbutton with preheat or without In this test VISP checks that the startbutton and the preheating switch is connected to the vehicle control unit. If the bus is equipped with preheat, the operator receives three instructions on the screen. The first is to turn the feed switch to position C and hold it in place. The second instruction asks the operator to push the start button and hold it in place. Finally the operator is asked to release the button and the test is done. If the bus is not equipped with preheating the first step, turn key to preheat, is left out. 2.5.1 Texts for the operator The following instructions are shown on the screen: • Activate preheat This text is shown only for buses with preheating function. Instruction: The operator shall turn the feed switch to position C. • Push start button Instruction: The operator shall push the start button. • Release start button Instruction: The operator shall release the start button. 2.5.2 Texts shown if time-out has occurred The following texts are shown on the screen if time-out has occurred: • Preheat signal is low, VECUPA7 Explanation: The signal on connection PA7 (preheating signal) is low. Probable cause: A defective switch. • Start signal is low, VECUPA6 Explanation: The signal on connection PA6 (start signal) is low. Probable cause: A defective switch. • Preheat or startsignal is high, VECUPA6, VECUPA7 Explanation: The signal on connection PA6 or PA7 (preheat or startsignal) is high. Probable cause: A defective switch.
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
Tests
15
2.6 Test of EOL (End Of Line) This is an automatic test performed by VISP. The program checks that the EOL connection is not connected to battery voltage. The operator does not have to do anything during this test. 2.6.1 Text for the operator The following instruction is shown on the screen: • Automatic EOL test Explanation: VISP checks that the EOL connection is not connected to battery voltage. 2.6.2 Text shown if time-out has occurred The following text is shown on the screen if time-out has occurred: • EOL signal is high, VECUPA22 Explanation: The EOL-signal is too high (connection PA22). Probable cause: The connection is connected to battery voltage.
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
16
Tests
2.7 Test, voltage of battery This is a voltage test for 24 V batteries performed by VISP. VISP checks that the supply voltage from the battery to the vehicle control unit is correct. The supply voltage should be between the limit 20-30 V. The operator does not have to do anything during this test. 2.7.1 Text for the operator The following instruction is shown on the screen: • Automatic vecu voltage test Explanation: VISP checks that the supply voltage to the vehicle control is correct. 2.7.2 Texts shown if time-out has occurred The following texts are shown on the screen if time-out has occurred: • Battery voltage is lower than 20 V, VECUPA13, VECUPA12 Explanation: The battery voltage is lower than 20 V, which is the lowest voltage limit. Probable cause: The battery is not giving a correct supply voltage or the control unit is defective. If there is something wrong with the control unit it may interpret the supply voltage as incorrect. • Battery voltage is higher than 30 V, VECUPA13, VECUPA12 Explanation: The battery voltage is higher than 30 V which is the highest voltage limit. Probable cause: The battery is not giving a correct supply voltage or the control unit is defective. If there is something wrong with the control unit it may interpret the supply voltage as incorrect.
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
Tests
17
2.8 Test of cruise control In this test, VISP checks that the buttons for the cruise control are correctly connected to the vehicle control unit. The cruise control is located on the same lever as the signals for indicators and headlight. The operator receives four instructions on the screen. The first instruction is to press the button SET+. The second instruction is to press the button SET-. The third one tells the operator to press Resume. Finally the operator shall turn off the cruise control. 2.8.1 Texts for the operator The following instructions are shown on the screen: • Press cruise control set+ & hold Instruction: The operator shall press down and hold the button SET+. • Press cruise control set- & hold Instruction: The operator shall press down and hold the button SET-. • Press cruise control resume & hold Instruction: The operator shall press down and hold the button RESUME. • Turn off cruise control Instruction: The operator shall turn off the cruise control. 2.8.2 Texts shown if time-out has occurred The following texts are shown on the screen if time-out has occurred: • CC: set+ signal is low, VECUPA2 Explanation: The signal on connection PA2 (cruise control SET+) is too low. Probable cause: An open circuit. • CC: set- signal is low, VECUPA1 Explanation: The signal on connection PA1 (cruise control SET-) is too low. Probable cause: An open circuit. • CC: Resume or on/off signal is low, VECUPA30, VECUPA3 Explanation: The signal on connection PA30 or PA3 (cruise control RESUME or ON/OFF) is too low. Probable cause: The error may be caused by an open circuit. • CC: Resume or on/off signal is high, VECUPA30, VECUPA3 Explanation: The signal on connection PA30 or PA3 (cruise control RESUME or ON/OFF) is too high. Probable cause: A defective switch or short circuit to voltage.
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
18
Tests
2.9 Test of windshield wipers and washer VISP checks that the switch for the windshield wipers and washer, are correctly connected to the vehicle control unit.
14XX005
Figure 6. The function Wash/Wipe is located at the control lever.
The operator receives instructions on the screen to pull the lever Wash/Wipe. The lever shall be held in position until the operator receives instructions to release it. 2.9.1 Texts for the operator The following instructions are shown on the screen: • Pull wash/wipe & hold Instruction: The operator shall pull the lever for windshield wipers and washer towards one and hold it there. • Release wash/wipe Instruction: The operator shall release the lever. 2.9.2 Texts shown if time-out has occurred The following texts are shown on the screen if time-out occures during the test: • Wash & wipe signal is low, VECUPA11 Explanation: The signal on connection PA11 (windshield wipers and washer) is too low. Probable cause: An open circuit. • Wash & wipe signal is high, VECUPA11 Explanation: The signal on connection PA11 (windshield wipers and washer) is too high. Probable cause: A defective switch or shortcircuit to voltage.
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
Tests
19
2.10 Test of windshield wiper interval VISP checks that the interval switch for the windshield wipers, the interval relay and the input signal to the hold circuit are correctly connected to the vehicle control unit.
14XX006
Figure 7. By moving the lever upwards, the interval for the windshield wipers is activated.
The operator receives instructions on the screen, to activate the interval for the windshield wipers by moving the lever upwards. After a short while the operator recieves instructions to turn off the interval. 2.10.1 Texts for the operator The following instructions are shown on the screen: • Turn on wiper interval Instruction: The operator shall activate the interval for the windshield wipers by moving the lever upwards. • Turn off wiper interval Instruction: The operator shall turn off the interval for the windshield wipers. 2.10.2 Texts shown if time-out has occurred The following texts are shown on the screen if time-out has occurred: • Wiper interval signal is low, VECUPA10 Explanation: The signal on connection PA10 (the interval for the windshield wipers) is too low. Probable cause: An open circuit. • Interval relay output is low, VECUPB16 Explanation: The signal on connection PB16 (output signal for the interval relay) is too low. Probable cause: An open circuit.
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
20
Tests
• Hold circuit wiper signal is low, VECUPA9 Explanation: The signal on connection PA9 (the hold circuit for the windshield wipers) is too low. Probable cause: An open circuit. • Wiper interval signal is high, VECUPA10 Explanation: The signal on connection PA10 (interval for the windshield wipers) is too high. Probable cause: A defective switch or shortcircuit to voltage. • Interval relay output is high, VECUPB16 Explanation: The signal on connection PB16 (output for the interval relay) is too high. Probable cause: A defective switch or shortcircuit to voltage. • Hold circuit wiper signal is high, VECUPA9 Explanation: The signal on connection PA9 (hold circuit for the windshield wipers) is too high. Probable cause: A defective switch or shortcircuit to voltage.
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
Tests
21
2.11 Test of vehicle speed sensor This is an automatic test performed by VISP. The program checks that the vehicle speed sensor is connected to the vehicle control unit. The operator does not have to do anything during this test. 2.11.1 Text for the operator The following instruction is shown on the screen: • Automatic vehicle speed sensor test Explanation: VISP checks the vehicle speed sensor. 2.11.2 Text shown if time-out has occurred The following text is shown on the screen if time-out has occurred: • Speed is not zero (PID84>0), VECUPB6, VECUPB20 Explanation: The vehicle’s speed is not zero this means that the value on the signals (connections PB6 and PB20) is not zero. The vehicle speed sensor receives voltage impulses, even though the bus is standing still.
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
22
Tests
2.12 Test of accelerator pedal VISP checks that the accelerator pedal and the idle switch are connected to the control unit. During the test, the operator receives two instructions on the screen. The first instruction is to press the accelerator pedal to the floor. The second instruction is to release the accelerator pedal. 2.12.1 Texts for the operator The following instructions are shown on the screen: • Press accelerator pedal to maximum position Instruction: The operator shall press the accelerator pedal to the floor. • Release accelerator pedal Instruction: The operator shall release the accelerator pedal. 2.12.2 Texts shown if time-out has occurred Accelerator pedal and idle switch The following texts are shown on the screen if time-out has occurred: • Too low throttle signal (PID91 < 100%), VECUPB8 Explanation: The signal on the connection PB8 (accelerator pedal) is too low. Probable cause: The error may be caused by an open circuit. • Buffered idle switch output (is) signal is low, VECUPB17 Explanation: The signal on connection PB17 (the buffered output signal for idle witch) is too low. Probable cause: An open circuit. • TOO HIGH THROTTLE SIGNAL (PID91 > 0%), VECUPB8 Explanation: The signal on connection PB8 (accelerator pedal) is too high. Probable cause: A defective switch or shortcircuit to voltage. • BUFFERED IDLE SWITCH OUTPUT (IVS) SIGNAL IS HIGH, VECUPB17 Explanation: The signal on connection PB17 (the buffered output signal for the idle switch) is too high. Probable cause: The error may be caused by a defective switch or shortcircuit to voltage.
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
Tests
23
2.13 Test of parking brake switch In this test VISP checks that the switch for the parking brake is connected to the vehicle control unit. Two instructions are shown on the screen. The first one tells the operator to pull the parking brake. The second instruction tells the operator to release the parking brake. 2.13.1 Texts for the operator The following instructions are shown on the screen: • Pull parking brake & hold Instruction: The operator shall pull the parking brake and hold it in position until next instruction is shown on the screen. • Release parking brake Instruction: The operator shall release the parking brake. 2.13.2 Texts shown if time-out has occurred The following texts are shown on the screen if time-out has occurred: • Parking brake signal is low, VECU PB11 Explanation: The signal on connection PB11 (parking brake) is too low. Probable cause: A defective switch or an incorrect input signal. • Parking brake signal is high, VECU PB11 Explanation: The signal on connection PB11 (parking brake) is too high. Probable cause: A defective switch or an incorrect input signal.
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
24
Tests
2.14 Retarder lever The retarde lever test checks that the retarder lever is connected to the VECU. Reading the status of Ppid 68 2.14.1 Texts for the operator The following instructions are shown on the screen: • Set retarder lever in OFF position Instruction: The operator shall set the retarder lever in OFF position. • Set retarder lever in AUTO position Instruction: The operator shall set the retarder lever in AUTO position. • Set retarder lever in position 1 Instruction: The operator shall set the retarder lever in position 1. • Set retarder lever in position 2 Instruction: The operator shall set the retarder lever in position 2. • Set retarder lever in position 3 Instruction: The operator shall set the retarder lever in position 3. • Set retarder lever in position 4 Instruction: The operator shall set the retarder lever in position 4. 2.14.2 Texts shown if time-out has occurred The following texts are shown on the screen if timeout has occurred: • Retarder lever is not in OFF pos, VECU PB24 Explanation: The operator has not set the retarder lever in OFF position. Probable cause: No connection and shortcuts are detected. • Retarder lever is not in AUTO pos, VECU PB24 Explanation: The operator has not set the retarder lever in AUTO position. Probable cause: No connection and shortcuts are detected. • Retarder lever is not in 1:th pos, VECU PB24 Explanation: The operator has not set the retarder lever in position 1. Probable cause: No connection and shortcuts are detected. • Retarder lever is not in 2:nd pos, VECU PB24 Explanation: The operator has not set the retarder lever in position 2. Probable cause: No connection and shortcuts are detected. • Retarder lever is not in 3:rd pos, VECU PB24 Explanation: The operator has not set the retarder lever in position 3. Probable cause: No connection and shortcuts are detected. • Retarder lever is not in 4:th pos, VECU PB24 SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
Tests
25
Explanation: The operator has not set the retarder lever in position 4. Probable cause: No connection and shortcuts are detected.
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
26
Tests
2.15 Brake pressure switch The brake pressure switch test checks that the brake pressure switch is connected to the VECU. Reading the status of Ppid 85 while asking the operator to press he brake pedal to the floor. After that the status of Ppid 85 has changed to 1 the operator is asked to release it. The status of Ppid 85 is read again and it should be 0. 2.15.1 Texts for the operator The following instructions are shown on the screen: • Press brake pedal & hold Instruction: The operator press the parking brake and hold it in position until next instruction is shown on the screen. • Release brake pedal Instruction: The operator shall release the brake. 2.15.2 Texts shown if time-out has occurred The following texts are shown on the screen if time-out has occurred: • Brake pressure signal low, VECU PB27 Explanation: Incorrect input signal Probable cause: Faulty switch, no connection and shortcuts are detected. • Brake pressure signal high, VECU PB27 Explanation: Incorrect input signal Probable cause: Faulty switch, no connection and shortcuts are detected.
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
Tests
27
2.16 Brake pedal switch The brake pedal switch test checks that the brake pedal switch is connected to the VECU. Reading the status of Ppid 85 while asking the operator to press he brake pedal to the floor. After that the status of Ppid 85 has changed to 1 the operator is asked to release it. The status of Ppid 85 is read again and it should be 0. 2.16.1 Texts for the operator The following instructions are shown on the screen: • Press brake pedal & hold Instruction: The operator press the parking brake and hold it in position until next instruction is shown on the screen. • Release brake pedal Instruction: The operator shall release the brake. 2.16.2 Texts shown if time-out has occurred The following texts are shown on the screen if time-out has occurred: • Redundant brake signal is low, VECU PA5 Explanation: The operator has forgot to press down the brake pedal or there is an incorrect input signal. Probable cause: Faulty switch/cable/connector is detected. • Redundant brake signal is high, VECU PA5 Explanation: The operator has forgot to release the brake pedal or there is an incorrect input signal. Probable cause: Faulty switch/cable/connector is detected.
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
28
Tests
2.17 Clutch pedal switch The clutch pedal switch test checks that the clutch pedal switch is connected to the VECU. Reading the status of pid 85 while asking the operator to press he clutch pedal to the floor. After that the status of pid 85 has changed to 1 the operator is asked to release it. The status of pid 85 is read again and it should be 0. 2.17.1 Texts for the operator The following instructions are shown on the screen: • Press clutch & hold Instruction: The operator press the clutch and hold it in position until next instruction is shown on the screen. • Release clutch Instruction: The operator shall release the clutch. 2.17.2 Texts shown if time-out has occurred The following texts are shown on the screen if time-out has occurred: • Clutch signal is low, VECU PA8 Explanation: The operator has forgot to press down the brake pedal or there is an incorrect input signal. Probable cause: No connection and shortcuts are detected. • Clutch signal is high, VECU PA8 Explanation: The operator has forgot to release the brake pedal or there is an incorrect input signal. Probable cause: No connection and shortcuts are detected.
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
Tests
29
2.18 Brake light, retarder The brake light retarder test checks that the brake light output PB1 on the VECU is working. Reads the status of Ppid 76. The operator must press F8 if the lights are on. After that the output PB1 is turned off. 2.18.1 Texts for the operator The following instructions are shown on the screen: • Brake light test (retarder) Instruction: VISP ignites the retarder lamp. • Is the brake light on? Instruction: The operator must confirm that the lamp is lit. He must press F8 if the lights are on. 2.18.2 Texts shown if time-out has occurred The following texts are shown on the screen if time-out has occurred: • Not possible to turn on output brake light, VECU PB1 Explanation: VISP can not turn the light on. Probable cause: No connection and shortcircuits are detected. Faulty output is detected. • Not possible to turn off output brake light, VECU PB1 Explanation: VISP can not turn the light off. Probable cause:No connection and shortcircuits are detected. Faulty output is detected. • Not possible to log out Explanation: VISP can not log out. Probable cause:No connection and shortcircuits are detected. Faulty output is detected. • You have not pressed YES (F8) or NO (F5) Explanation: The operator has not confirmed. Probable cause: The operator may have ignored to confirm or he may have been to late for time out. 2.18.3 Evaluation results This is the evaluation result from the test: • The brake light was not on when activating the brake light (retarder), Pin PB1 No connection and shortcircuits are detected. Faulty output is detected. The lamp can be broken.
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
30
Tests
2.19 Status Microswitch Clutch, Test This is a automatic test that checks the clutch´s microswitch when unactivated. Reading the status of Pid 85. 2.19.1 Texts for the operator The following instructions are shown on the screen: • Status microswitch clutch Instruction: VISP checks that the status of the microswitch clutch is correct. 2.19.2 Texts shown if time-out has occurred The following texts are shown on the screen if time-out has occurred: • Clutch signal is high, VECU PA8 Explanation: Incorrect input signal. Probable cause: No connection and shortcuts are detected. • Clutch signal is low, VECU PA8 Explanation: Incorrect input signal. Probable cause: No connection and shortcuts are detected.
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
Tests
31
2.20 Status Microswitch Brake, Test This is a automatic test that checks the brake pedals microswitch when unactivated. Reading the status of Ppid85. 2.20.1 Texts for the operator The following instructions are shown on the screen: • Status microswitch brake Instruction: VISP checks that the status of the microswitch brake is correct. 2.20.2 Texts shown if time-out has occurred The following texts are shown on the screen if time-out has occurred: • Redundant brake signal is high, VECU PA5 Explanation: Incorrect input signal. Probable cause: No connection and shortcuts are detected. • Redundant brake signal is low, VECU PA5 Explanation: Incorrect input signal. Probable cause: No connection and shortcuts are detected.
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
Feedback One of our objectives is that production personnel should have access to correct and appropriate production manuals. In order to maintain the high standard of our literature, your opinions and experience when using this manual would be greatly appreciated. If you have any comments or suggestions, make a copy of this page, write down your comments and send them to the address below.
To:
From:
Volvo Bus Corporation
...........................................................................
Dept. Software Processes 80 643
...........................................................................
S-405 08 Gothenburg
...........................................................................
SWEDEN
........................................................................... ........................................................................... ...........................................................................
Comments and proposals concerning manual:
Control Unit, VECU (Vehicle Electronical Control Unit), Issue 2
............................................................................................................................................................... ............................................................................................................................................................... ............................................................................................................................................................... ............................................................................................................................................................... ............................................................................................................................................................... ............................................................................................................................................................... ............................................................................................................................................................. . ................................................................................................................................................. .............
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
SW Production Preparation Dept 80643
Volvo Bus Corporation 405 08 Gothenburg Sweden
Document No: Issue date:
70312913 11/7/2000
More Documents from "Abolfazl"
277791763-driver-display-volvo-truck_54-54.pdf
November 2019 0
277791763-driver-display-volvo-truck_38-38.pdf
November 2019 0
277791763-driver-display-volvo-truck_33-33.pdf
November 2019 0
277791763-driver-display-volvo-truck_18-18.pdf
November 2019 0
277791763-driver-display-volvo-truck_30-30.pdf
November 2019 5