Reading and Clearing Diagnostic Trouble Codes

SPEAKER WALK-AROUND TEST - BASE AM/FM AUDIO UNIT

NOTE: The audio unit must be turned on to enter the speaker walk-around test.

1. To enter the test, press and hold preset buttons 3 and 6 simultaneously for approximately 3 seconds, then release.
2. The test applies sound to each speaker for 1-2 seconds. Speakers are tested in the following sequence: RH, LH.
3. To exit the test, turn the key to OFF or turn the audio unit off.
4. If the concern remains and the fault is not detected, GO to Symptom Chart. Symptom Related Diagnostic Procedures

SPEAKER WALK-AROUND TEST - ALL EXCEPT BASE AM/FM AUDIO UNIT

NOTE:
- The audio unit must be turned on and in radio tuner mode (AM/FM) to enter the speaker walk-around test or 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 and hold preset buttons 3 and 6 simultaneously for approximately 3 seconds, then release.
2. The test applies sound to each speaker for 1-2 seconds. Speakers are tested and shown on the display in the following sequence: RF, LF, LR, RR, SUBWOOFER.
3. To exit the test, turn the key to OFF, turn the audio unit off, or press preset button 1 for diagnostics. The TREMOR audio unit automatically exits the speaker walk-around test when it is complete.

NOTE: Always document, clear, and carry out the self-test again.

4. The self-diagnostic mode has 5 manual tests available:
- Preset button 1 = Enter diagnostics. This test enters diagnostics from the speaker walk-around test. The on-demand self-test of the audio subsystem is performed. This tests for concerns with random access memory (RAM), read only memory (ROM) or electronically etched programmable read only memory (EEPROM).
- Preset button 2 = Continuous DTCs. This test enters diagnostics from the speaker walk-around test. This test displays any diagnostic trouble codes (DTCs) currently set.
- Preset button 3 = Signal strength test. This test shows the average signal strength of the currently tuned frequency over a 5-second interval.
- Preset button 4 = Software configuration level. This test queries each audio unit system controller for its software configuration level.
- Preset button 5 = Display test. This test lights all the display segments for 5 seconds, then turns all segments off.

5. To exit the self-diagnostic mode, turn the key to OFF or turn the audio unit off. On the TREMOR audio unit, pressing preset buttons 3 and 6 simultaneously re-enters the speaker walk-around test and automatically exits the self-diagnostic mode when the test is complete.
6. If the DTCs retrieved are related to the concern, go to the Audio Unit Diagnostic Trouble Code (DTC) Index. Diagnostic Trouble Code Tests and Associated Procedures
7. If the concern remains and the fault is not detected, GO to Symptom Chart. Symptom Related Diagnostic Procedures