2002 Explorer Power Locks System Diagnosis

2002 Ford Truck Explorer 4WD V6-4.0L VIN E

Copyright © 2008, ALLDATA

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Power Locks: Testing and Inspection Early Build / Late Build Definition Early Build - Vehicles Built Before 03/2002 Late Build - Vehicles Built After 03/2002

Principles of Operation PRINCIPLES OF OPERATION Power Locking The power locking/unlocking feature requests all of the vehicle doors, including the liftgate, be locked or unlocked upon a customer request from any interior power lock switch in the vehicle. Power locking and unlocking of the doors operates independently of the position of the ignition and independently of the vehicle speed. The power locking/unlocking feature unlocks all the doors when an unlock request is provided from any power door lock control switch. The power locking/unlocking feature locks all the doors when a lock request is provided from any interior power lock switch. When the vehicle security module receives an unlock/lock command from any power door lock control switch, the vehicle security module will activate relays internal to the module to supply the correct power and grounds for the door lock actuators. The liftgate glass release switch will only operate when all doors are unlocked. The liftgate glass release, using the keypad or the remote transmitter, will not operate if the vehicle speed is greater than 7 km/h (5 mph), the doors are locked, the battery has been disconnected and then reconnected, or if the module has been disconnected and then reconnected causing the liftgate glass release switch to enter the disable mode. The liftgate release switch is reset by unlocking all the doors and operates independent of vehicle speed.

Power Unlock Inhibit With the ignition off, 20 seconds after electrically locked (key fob, keypad, door lock control switch locked with door ajar) and all doors are closed, the power door unlock switch will be inhibited if this feature is enabled. (The lock function will still operate.)

Deactivating/Activating Power Door Unlock Switch Inhibit This is customer configurable. Steps one through three must be completed within 30 seconds. 1. Turn the ignition key to ON, then press UNLOCK three times. 2. Turn the ignition key to OFF, then press UNLOCK three times. 3. Turn the ignition key to ON, within five seconds press LOCK two times. The user should receive two horn chirps to indicate the system has been disabled or two chirps, followed by the horn sounding, to indicate the system has been enabled. Pressing LOCK two times again will toggle the door lock control switch inhibit feature state. Turn the ignition OFF to exit programming mode. This feature can also be enabled/disabled using a diagnostic tool. Autolocking The autolocking feature locks all doors when all doors, including the liftgate, are closed, the brake pedal was pressed with the ignition in RUN, then vehicle speed of 8 kph (5 mph) or higher was achieved. This feature relocks the doors (if any doors were open) after the brake pedal is pressed, once all doors are read as closed and vehicle speed exceeds 8 kph (5 mph). Door ajar switches are wired directly to the vehicle security module. The autolocking feature can be enabled/disabled through module configuration, diagnostics, and keyless entry keypad. Autolock Enable/Disable - Using the Keypad A manual enable/disable mode allows the autolock feature to be turned off and on. To enable or disable autolock using the keyless entry keypad: 1. Enter the five-digit permanent entry code into the keyless entry keypad. 2. Within five seconds of entering the code, press and hold the 7/8 button on the keypad. 3. Within five seconds of Step 2, and while holding the 7/8 button, press the 3/4 button on the keypad and release it. 4. Within five seconds of Step 3, release the 7/8 button on the keypad. If the autolock feature is disabled, the horn will chirp once. If the autolock feature is enabled, the horn will chirp once shortly and then sound a second time for a longer sound of the horn once the above sequence is completed. Autolock Enable/Disable - Using the Ignition Switch Another way to turn the autolock off/on is by following this series of steps: 1. Close all doors. 2. Confirm that the ignition switch is in the OFF position.

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3. Turn the ignition switch from OFF to RUN. 4. NOTE: Steps 4 through 8 must be carried out within 30 seconds. Press the power door lock UNLOCK button three times. 5. 6. 7. 8. 9. 10.

Turn the ignition switch from RUN to OFF. Press the power door lock UNLOCK button three times. Turn the ignition switch from OFF to RUN. Verify that the horn chirps. This indicates the enable/disable mode has been entered and is ready to accept program changes. Press the power door lock UNLOCK button one time then press the LOCK button. Verify that the horn chirps one time. There should only be one chirp indicating that the autolock/relock feature has been disabled. If one chirp is heard, followed by a longer sound of the horn, the autolock/relock feature has just been enabled. Return to Step 9. 11. Turn the ignition switch to the OFF position to exit the enable/disable mode. If the autolock status has changed the horn will chirp once. If the status has not changed there will be no chirp.

Smart Unlocking The smart unlocking feature prevents the driver door from locking with the key in the ignition. When the vehicle security module receives a LOCK command from a door lock control switch, and the key in the ignition with the driver door open, the vehicle security module will command the driver door to UNLOCK. Remote Transmitter Lock/Unlocking Control - Unlocking The remote control feature provides lock/unlock functions independent of ignition/speed/PRNDL state. The remote control feature provides a two-step process for unlocking the doors. Upon receipt of the first requests for unlocking the doors, the remote control feature requests the vehicle security module to unlock the driver door only. If another unlock request is received within three seconds of the first, the remote control feature will request that all doors be unlocked. Remote Transmitter Lock/Unlocking Control - Locking The remote control feature requests that all the doors be locked when the LOCK button is pressed. On any press of the lock button with all doors closed: the remote control feature will request one flash of the parking lamps. If any door is ajar, no flash will occur, indicating it locked all the doors but one or more doors are ajar. As soon as the last door is closed, the vehicle will provide the one flash of the parking lamps. If two presses of the lock button are received within two seconds the horn will chirp once, and flash the parking lamps twice to indicate that all the doors are closed and locked. If any door is ajar when the second lock request is received within three seconds of the first, the remote control feature will request the horn chirp twice without flashing the parking lamps to indicate it locked all the doors but one or more doors are ajar. When the ignition is in the RUN or START position, no parking lamp flashes or horn chirp confirmations will occur. Panic Alarm The panic alarm feature controls activation of the panic alarm providing audible and visual alarms which are evident from the exterior of the vehicle. The panic alarm feature requests that the parking lamps and horn are flashed until deactivation. The flashing of the outputs occurs synchronously. Activation of the panic alarm is accomplished by pressing the PANIC button on a remote entry key fob whenever the ignition is off or in the ACC position. At all other times this feature is disabled. Deactivation of an active PANIC alarm is accomplished by: 1) a second press of the key fob PANIC button, 2) the ignition is switched out of the OFF or ACC position or; 3) a period of 2.75 minutes has elapsed since the initial activation. Keyless Entry Keypad The keyless entry keypad, located on the exterior of the driver door, provides a method for the customer to access their vehicle without a key or remote transmitter. The keyless entry keypad feature: - locks all doors and inhibits the door lock control switch UNLOCK capability after 20 seconds (if the inhibit feature is enabled). - unlocks only the driver door. - unlocks all doors. - programs/erases customer key code. - enables/disables autolocking. The keyless entry keypad feature operates independently of ignition status, vehicle speed, or transmission position. When a keypad button is depressed, the keypad buttons illuminate to provide better visibility. If LOCK ALL DOORS is entered or five seconds have elapsed since the last button press, the illumination is turned off. Each vehicle equipped with a keyless entry keypad is programmed with a five-digit entry code. This code is provided to the customer through a wallet card in the Owner package. In addition, this code is available through a diagnostic tool and is also printed on the vehicle security module label. When entering codes each digit must be entered within five seconds of the previous button press.

Programming/Erasing Personal Code A unique personal five-digit code can be programmed by following these steps: 1. Enter the factory set five-digit code (the keypad will illuminate when pressed). 2. Press 1/2 within five seconds of Step 1. 3. Enter the unique five-digit code

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The personal code does not substitute for the permanent factory set code. Either code can be used to access the vehicle. In addition, if a second personal code is programmed, it will simply overwrite the previous personal code. To erase a personal code, carry out the following procedure: 4. Enter factory set five-digit code. 5. Press 1/2 within five seconds of Step 1. 6. Press 7/8 and 9/0 at the same time within five seconds of Step 2. The system will now only respond to the factory set code. Anti-Scan Feature To provide added security, the keyless entry pad is disabled for one minute after 35 button presses without a valid entry code being entered. The keypad will flash during this one-minute mode with all functionality disabled except for 7/8 and 9/0 still being allowed to lock the vehicle. Anti-Scan will be turned off one minute of keypad inactivity. Unlocking the Doors with the Keyless Entry Keypad System To unlock the driver door, enter either the factory set code or the personal code (each digit must be pressed within five seconds of the prior digit). The interior lamps will illuminate. To unlock all doors, enter either the factory set code or the personal code (driver door unlocks) and press the 3/4 control within five seconds. Locking the Doors with the Keyless Entry Keypad System It is not necessary to enter the factory set or personal code prior to locking all doors. To lock all doors, press the 7/8 and 9/0 controls at the same time.

Inspection and Verification INSPECTION AND VERIFICATION 1. Verify the customer concern by operating the system.

Visual Inspection Chart 2. 3. 4. 5.

Visually inspect for obvious signs of mechanical or electrical damage. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step. If the diagnostic tool does not power up, refer to the diagnostic tool manual. Carry out the DATA LINK DIAGNOSTICS test. If the diagnostic tool responds with: - CKT693 (OG), CKT914, CKT915 or CKT70 = ALL ECUS NO RESP/NOT EQUIP, refer to Information Bus (Module Communications Network). - NO RESP/NOT EQUIP for vehicle security module, refer to Body Control Systems (Multifunction Electronic Control Module). - SYSTEM PASSED, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs, and carry out the self-test diagnostics for the vehicle security module.

6. If the DTCs retrieved are related to the concern, go to the Vehicle Security Module Diagnostic Trouble Code (DTC) Index to continue diagnostics. See: Late Build/Trouble Code Diagnostic Charts 7. If DTCs are retrieved that are not found in the Vehicle Security Module Diagnostic Trouble Code (DTC) Index, refer to the Master Vehicle Security Module Diagnostic Trouble Code (DTC) Index in Body Control Systems (Multifunction Electronic Control Module). 8. If no DTCs related to the concern are retrieved, proceed to the Symptom Chart to continue diagnostics. See: Late Build/Diagnosis By Symptom

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B1300-B2695

Test A: A Single/More Than One Door Lock Is Inoperative - Power Locking PINPOINT TEST A: A SINGLE/MORE THAN ONE DOOR LOCK IS INOPERATIVE - POWER LOCKING

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A16

Test B: The Doors Do Not Lock/Unlock Using the Keyless Entry Keypad PINPOINT TEST B: THE DOORS DO NOT LOCK/UNLOCK USING THE KEYLESS ENTRY KEYPAD

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Test C: The Doors Do Not Lock/Unlock Using the Remote Transmitter PINPOINT TEST C: THE DOORS DO NOT LOCK/UNLOCK USING THE REMOTE TRANSMITTER

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Test D: The Auto Lock Does Not Operate Correctly PINPOINT TEST D: THE AUTO LOCK DOES NOT OPERATE CORRECTLY

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D7-D8

Test E: Panic Feature Is Inoperative/Does Not Operate Correctly PINPOINT TEST E: PANIC FEATURE IS INOPERATIVE/DOES NOT OPERATE CORRECTLY

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E9-E10

Test F: The Keyless Entry Keypad Illumination Is Inoperative PINPOINT TEST F: THE KEYLESS ENTRY KEYPAD ILLUMINATION IS INOPERATIVE

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Test G: Remote Keyless Entry Transmitter Out of Synchronization PINPOINT TEST G: REMOTE KEYLESS ENTRY TRANSMITTER OUT OF SYNCHRONIZATION

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Test H: The Smart Lock Does Not Operate Correctly PINPOINT TEST H: THE SMART LOCK DOES NOT OPERATE CORRECTLY

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Symptom Chart

Principles of Operation PRINCIPLES OF OPERATION Power Door Locks The central security module controls the power door lock and keyless entry system. The lock and unlock operation is carried out by supplying ground to the central security module from the door lock control switch. The normal path of the actuators is to ground through the central security module. The door lock control switch will lock and unlock all doors by grounding the appropriate circuit to the central security module. The central security module then supplies power to the appropriate common actuator circuit to lock or unlock all doors. The liftgate glass release switch will only operate when all the doors are unlocked. The liftgate glass release will not operate if the vehicle speed is greater than 5 km/h (3 mph), the doors are locked, the battery has been disconnected and then reconnected, or if the module has been disconnected and then reconnected causing the liftgate glass release switch to enter disable mode. The liftgate release switch is reset by unlocking all the doors. The door lock control switch inhibit feature will disable the door lock control switches when all doors are closed and the doors have been locked for at least 20 seconds.

Keyless Entry Keyless entry can be achieved through either the keyless entry keypad or keyless entry remote transmitter. The keyless entry keypad is wired directly to the central security module. Pressing a keyless entry keypad button supplies a ground signal to the central security module. When the correct code is received, the central security module will unlock the driver door. If the 3/4 is pressed within five seconds of the code entry, the central security module will unlock all doors. Pressing the 7/8 and 9/0 buttons when the driver door is closed will cause the central security module to lock the doors

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even without the code entry. The all door lock and all door unlock functions are the same circuit and operation as pressing a door lock control switch to lock or unlock. The keyless entry remote transmitter sends a frequency that is received by the central security module internal antenna. Depending on the frequency received, the central security module will lock all doors or unlock the driver door. If the unlock frequency is received again within three seconds of the first unlock, the central security module will unlock all doors. This function is the same as that for the keyless entry keypad. If the frequency received is for the panic button, the central security module will cycle ground to the park lamp relay coil and horn relay coil. The park lamps and horn will continue to cycle until the panic button is pressed again, the ignition switch is turned to the RUN position, or until 2 minutes and 45 seconds has elapsed.

Autolocks The autolock function will automatically lock the doors when the correct conditions exist. The conditions monitored for autolock are door ajar state, brake pedal and vehicle speed. The central security module monitors these inputs and when all are correct the central security module will lock all doors. For autolock to function the central security module must see a door ajar go from ajar to closed. Then the central security module will monitor the brake switch circuit for the voltage to drop indicating the brake pedal is released. The central security module will then monitor vehicle speed. When vehicle speed reaches more than 5 km/h (3 mph), the central security module will lock all doors. The vehicle will auto-relock if the door becomes ajar again and then the procedure is repeated. The autolock function can be disabled if the customer desires. Refer to Description and Operation for the correct procedure.

Autolock Enable/Disable - Using the Ignition Switch Another way to turn the autolock off/on is by following this series of steps: 1. Close all doors. 2. Confirm that the ignition switch is in the OFF position. 3. Turn the ignition switch from OFF to RUN. 4. NOTE: Steps 4 through 8 must be carried out within 30 seconds. Press the power door lock UNLOCK button three times. 5. 6. 7. 8. 9. 10.

Turn the ignition switch from RUN to OFF. Press the power door lock UNLOCK button three times. Turn the ignition switch from OFF to RUN. Verify that the horn chirps. This indicates the enable/disable mode has been entered and is ready to accept program changes. Press the power door lock UNLOCK button one time then press the power door lock LOCK button. Verify that the horn chirps one time. There should only be one chirp indicating that autolock/relock feature has been disabled. If one chirp is heard, followed by a longer sound of the horn, the autolock/relock feature has just been enabled. Return to Step 9. 11. Turn the ignition switch to the OFF position to exit the enable/disable mode. If the autolock status has changed the horn will chirp once. If the status has not changed there will be no chirp.

Autolock Enable/Disable - Using the Keypad A manual enable/disable mode allows the autolock feature to be turned off and on. To enable or disable autolock using the keyless entry keypad: 1. Enter the five-digit permanent entry code into the keyless entry keypad. 2. Within five seconds of entering the code, press and hold the 7/8 button on the keypad. 3. Within five seconds of Step 2, and while holding the 7/8 button, press the 3/4 button on the keypad and release it. 4. Within five seconds of Step 3, release the 7/8 button on the keypad. If the autolock feature is disabled, the horn will chirp once. If the autolock feature is enabled, the horn will chirp once shortly and then sound a second time for a longer sound of the horn once the above sequence is completed.

Inspection and Verification INSPECTION AND VERIFICATION 1. Verify the customer concern by operating the system.

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Visual Inspection Chart 2. Visually inspect for obvious signs of mechanical and electrical damage. Refer to the chart. 3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step. 4. If the concern remains after the inspection, connect the diagnostic tool to the data link connector (DLC) located beneath the instrument panel and select the vehicle to be tested from the diagnostic tool menu. If the diagnostic tool does not communicate with the vehicle: - check that the program card is correctly installed. - check the connections to the vehicle. - check the ignition switch position. 5. If diagnostic tool still does not communicate with the vehicle, refer to the diagnostic tool manual. 6. Carry out the DATA LINK DIAGNOSTICS test. If the diagnostic tool responds with: - CKT930 = ALL ECUS NO RESP/NOT EQUIP, refer to Information Bus (Module Communications Network). - NO RESP/NOT EQUIP for central security module, go to Body Control Systems (Multifunction Electronic Control Module). - SYSTEM PASSED, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs and carry out self-test diagnostics for the central security module. 7. If the DTCs retrieved are related to the concern, go to Central Security Module Diagnostic Trouble Code (DTC) Index to continue diagnostics. See: Early Build/Trouble Code Diagnostic Charts 8. If DTCs are retrieved that are not found in the Central Security Module Diagnostic Trouble Code (DTC) Index, refer to the master Central Security Module Diagnostics Trouble Code (DTC) index in Body Control Systems (Multifunction Electronic Control Module). 9. If no DTCs related to the concern are retrieved, proceed to the Symptom Chart to continue diagnostics. See: Early Build/Diagnosis By Symptom

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B1309-B2116

Test I: All Door Locks Are Inoperative From the Driver Door Lock Control Switch PINPOINT TEST I: ALL DOOR LOCKS ARE INOPERATIVE FROM THE DRIVER DOOR LOCK CONTROL SWITCH

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Test J: All Door Locks Are Inoperative From the Passenger Door Lock Control Switch PINPOINT TEST J: ALL DOOR LOCKS ARE INOPERATIVE FROM THE PASSENGER DOOR LOCK CONTROL SWITCH

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Test K: All Door Locks Are Inoperative From the Liftgate Door Lock Control Switch PINPOINT TEST K: ALL DOOR LOCKS ARE INOPERATIVE FROM THE LIFTGATE DOOR LOCK CONTROL SWITCH

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Test L: All Door Locks Are Inoperative PINPOINT TEST L: ALL DOOR LOCKS ARE INOPERATIVE

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Test M: A Passenger Door Lock Is Inoperative PINPOINT TEST M: A PASSENGER DOOR LOCK IS INOPERATIVE

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Test N: A Driver Door Lock Is Inoperative PINPOINT TEST N: A DRIVER DOOR LOCK IS INOPERATIVE

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Test O: The Autolock Does Not Operate Correctly PINPOINT TEST O: THE AUTOLOCK DOES NOT OPERATE CORRECTLY

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O15

Test P: The Doors Do Not Lock/Unlock Using the Keyless Entry Keypad PINPOINT TEST P: THE DOORS DO NOT LOCK/UNLOCK USING THE KEYLESS ENTRY KEYPAD

2002 Ford Truck Explorer 4WD V6-4.0L VIN E

Copyright © 2008, ALLDATA

P1-P2

9.90

Page 81

2002 Ford Truck Explorer 4WD V6-4.0L VIN E

Copyright © 2008, ALLDATA

P3

9.90

Page 82

2002 Ford Truck Explorer 4WD V6-4.0L VIN E

Copyright © 2008, ALLDATA

P4-P5

9.90

Page 83

2002 Ford Truck Explorer 4WD V6-4.0L VIN E

Copyright © 2008, ALLDATA

P6

9.90

Page 84

2002 Ford Truck Explorer 4WD V6-4.0L VIN E

Copyright © 2008, ALLDATA

P7

9.90

Page 85

2002 Ford Truck Explorer 4WD V6-4.0L VIN E

Copyright © 2008, ALLDATA

9.90

Page 86

P8

Test Q: The Doors Do Not Lock/Unlock Using the Keyless Entry Remote Transmitter PINPOINT TEST Q: THE DOORS DO NOT LOCK/UNLOCK USING THE KEYLESS ENTRY REMOTE TRANSMITTER

2002 Ford Truck Explorer 4WD V6-4.0L VIN E

Copyright © 2008, ALLDATA

Q1-Q3

9.90

Page 87

2002 Ford Truck Explorer 4WD V6-4.0L VIN E

Copyright © 2008, ALLDATA

Q4-Q6

9.90

Page 88

2002 Ford Truck Explorer 4WD V6-4.0L VIN E

Copyright © 2008, ALLDATA

Q7-Q8

9.90

Page 89

2002 Ford Truck Explorer 4WD V6-4.0L VIN E

Copyright © 2008, ALLDATA

Q9-Q10

9.90

Page 90

2002 Ford Truck Explorer 4WD V6-4.0L VIN E

Copyright © 2008, ALLDATA

Q11

9.90

Page 91

2002 Ford Truck Explorer 4WD V6-4.0L VIN E

Copyright © 2008, ALLDATA

9.90

Page 92

Q12

Test R: Remote Keyless Entry Transmitter Out of Synchronization PINPOINT TEST R: REMOTE KEYLESS ENTRY TRANSMITTER OUT OF SYNCHRONIZATION

2002 Ford Truck Explorer 4WD V6-4.0L VIN E

Copyright © 2008, ALLDATA

R1-R2

9.90

Page 93

2002 Ford Truck Explorer 4WD V6-4.0L VIN E

Copyright © 2008, ALLDATA

9.90

Page 94

R3-R5

Test S: Panic Feature Is Inoperative/Does Not Operate Correctly PINPOINT TEST S: PANIC FEATURE IS INOPERATIVE/DOES NOT OPERATE CORRECTLY

2002 Ford Truck Explorer 4WD V6-4.0L VIN E

Copyright © 2008, ALLDATA

S1-S2

9.90

Page 95

2002 Ford Truck Explorer 4WD V6-4.0L VIN E

Copyright © 2008, ALLDATA

S3

S4

9.90

Page 96

2002 Ford Truck Explorer 4WD V6-4.0L VIN E

Copyright © 2008, ALLDATA

S5-S7

9.90

Page 97

2002 Ford Truck Explorer 4WD V6-4.0L VIN E

Copyright © 2008, ALLDATA

S8

9.90

Page 98

2002 Ford Truck Explorer 4WD V6-4.0L VIN E

Copyright © 2008, ALLDATA

S9

9.90

Page 99

2002 Ford Truck Explorer 4WD V6-4.0L VIN E

Copyright © 2008, ALLDATA

9.90

Page 100

S10

Test T: The Keyless Entry Keypad Illumination Is Inoperative PINPOINT TEST T: THE KEYLESS ENTRY KEYPAD ILLUMINATION IS INOPERATIVE

2002 Ford Truck Explorer 4WD V6-4.0L VIN E

Copyright © 2008, ALLDATA

T1

9.90

Page 101

2002 Ford Truck Explorer 4WD V6-4.0L VIN E

Copyright © 2008, ALLDATA

T2

T3

9.90

Page 102

2002 Ford Truck Explorer 4WD V6-4.0L VIN E

Copyright © 2008, ALLDATA

T4-T5

9.90

Page 103

2002 Ford Truck Explorer 4WD V6-4.0L VIN E

Copyright © 2008, ALLDATA

Symptom Chart

9.90

Page 104