Inspection and Verification

Information and Entertainment System

Inspection and Verification

WARNING: If equipped with fire suppression system, for Important Safety Warnings. Failure to follow this instruction may result in serious personal injury Description and Operation.

1. Verify the customer concern.

2. Visually inspect for obvious signs of mechanical or electrical damage.

Visual Inspection 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 cause is not visually evident, verify the symptom and proceed to diagnose the audio system by entering the speaker walk-around test.


Speaker Walk-Around Test

NOTE: To enter the speaker walk-around test, the audio unit must be turned on and in radio tuner mode (AM/FM).

1. To enter the speaker walk-around test, simultaneously press and hold the audio unit preset buttons 3 and 6 (1 and 4 for ULC radio only) for approximately 3 seconds, then release.

2. The speaker walk-around test stops and applies sound to each speaker for about 1-2 seconds. Each speaker is tested and displayed on the audio unit in the following sequence: RF, LF, LR, RR.


Audio Unit Self-Diagnostic Mode

NOTE: The audio unit self-diagnostic mode can only be entered while in the speaker walk-around test.

1. The audio unit self-diagnostic mode has 5 tests available:
- Preset button 1 = Audio internal/external SELF-TEST. If SELF FAIL is displayed, press the TUNE > button to scroll view the DTCs stored. Refer to the Audio Unit DTC Chart Diagnostic Trouble Code Tests and Associated Procedures. If the system is OK, SELF PASS is displayed.

- Preset button 2 = View/clear continuous DTCs. NO DTCS is displayed if no DTCs are retrieved. If DTCS FOUND is displayed, press the TUNE > button to view the DTCs retrieved. Refer to the Audio Unit DTC Chart Diagnostic Trouble Code Tests and Associated Procedures. To clear all DTCs, press the EJECT button. DTCS CLEAR is displayed.

- Preset button 3 = SIGNAL TEST. This test measures the average strength at the current tuner setting.

- Preset button 4 = Software configuration level. This test queries each radio system controller for its software configuration level. SOFT LEVELS is displayed upon completion of the query. Press the TUNE > button to scroll view the software configuration version level.

Configurations and Software Levels






- Preset button 5 = DISPLAY TEST. This test lights all the audio unit display segments for 5 seconds and then turns all segments off. When the test is complete, DISPLAY TEST is displayed on the bezel.

2. To enter these tests, press the preset button desired while in the speaker walk-around test. This aborts the speaker walk-around test and starts the selected test.

3. To exit the audio unit self-diagnostic mode, turn the ignition switch or audio unit off.

4. If the concern remains and the fault is not detected, GO to Symptom Chart. Symptom Related Diagnostic Procedures