2002 Explorer Audio System Diagnosis

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

Copyright © 2008, ALLDATA

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Radio, Stereo, and Compact Disc: Testing and Inspection Initial Inspection 1. Verify the customer concern by operating the electronic audio system with the engine running and the vehicle in and out of motion.

Visual Inspection Chart 2. Visually inspect for obvious signs of mechanical and electrical damage; refer to chart. 3. If the fault is not visually evident, proceed to speaker walk-around test and self-diagnostic mode. See: Displaying & Reading Trouble Codes

Displaying & Reading Trouble Codes NOTE: The audio unit must be turned on and in radio tuner mode (AM/FM) to enter the speaker walk-around test or the self-diagnostic mode.

The self-diagnostic mode can only be entered while in the speaker walk-around test. 1. To enter the speaker walk-around test, press preset buttons 3 and 6 simultaneously, hold approximately three seconds and release. 2. The speaker walk-around test stops at each speaker and applies sound to each speaker for about one to two seconds. Each speaker is tested and shown on the display in the following sequence: RF, LF, LR, RR. 3. To exit the speaker walk-around test, turn the ignition switch off, turn the audio unit off, or press preset button 1 for "DIA". 4. The self-diagnostic mode has six manual tests available: ^ Preset button 1 = ENTER DIAGNOSTICS. This test enters diagnostics from the speaker walk-around test. Metrics are available with SEL and ON buttons indicating time played in AM/FM, media, number of buttons pressed, etc. ^ Preset button 2 = EEPROM BLOCK STATUS. This test shows validity of memory to calibrate clock and seek sensitivity. ^ Preset button 3 = EXIT DIAGNOSTICS. ^ Preset button 4 = Software configuration level. This test queries each radio system controller for its software configuration level. ^ Preset button 5 = DISPLAY TEST. This test lights all the display segments for five seconds and then turns all segments off. ^ Preset button 6 = RAM CONTENTS READOUT. To enter these tests, press preset button 1 while in the speaker walk-around test, then the desired preset button. NOTE: Always document, clear, and carry out the self-test again. 5. To exit the self-diagnostic mode, turn the ignition switch off or the audio unit off. 6. If the concern remains and the fault is not detected, proceed to the Symptom Chart to continue diagnostics. See: Diagnosis By Symptom

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

Copyright © 2008, ALLDATA

DTC Index B1342 - U2005

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

Test B: Poor Reception

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A1

A2

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

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B1 - B2

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

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B2 - B4

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

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B4 - B5

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

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B6 - B7

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

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B8 - B9

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

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B9 - B10

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

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C1 - C3

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

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C3

Test D: No Sound From One or More Speakers

D1 - D2

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

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D2 - D3

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

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D3

E1 - E2

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

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F1 - F2

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

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F3

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

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Test I: Auxiliary Audio Control Is Inoperative

G1

H1

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

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I1 - I2

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

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I2 - I4

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

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I4 - I6

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

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I6 - I8

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

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I8 I: Auxiliary Audio Control Inop - Steering Wheel Control Switch

Test J: Subwoofer Is Inoperative

J1 - J2

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

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J2 - J3

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

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J4 - J5

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

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J6 - J7

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

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K: Audio Unit Does Not Operate Correctly - Speed Sensitive Volume (SSV) / K1 - K2

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

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Symptom Chart, Part 1

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

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Symptom Chart, Part 2

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