Inspection and Verification
Information and Entertainment System
Inspection and Verification
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. For a base audio concern, if the cause is not visually evident, proceed to the Speaker Walk-Around Test - Base AM/FM Audio Unit or Speaker Walk-Around Test - All Except Base AM/FM Audio Unit.
5. For a satellite radio concern, if the cause is not visually evident, connect the scan tool to the Data Link Connector (DLC).
6. NOTE: The Vehicle Communication Module (VCM) LED prove-out confirms power and ground from the DLC are provided to the VCM.
If the scan tool does not communicate with the VCM:
- Check the VCM connection to the vehicle.
- Check the scan tool connection to the VCM.
- Refer to Information Bus, No Power To The Scan Tool, to diagnose no power to the scan tool.
7. If the scan tool does not communicate with the vehicle:
- Verify the ignition key is in the ON position.
- Verify the scan tool operation with a known good vehicle.
8. Carry out the network test.
- If the network test passes, retrieve and record the continuous memory DTCs.
9. If the DTCs retrieved are related to the concern, go to DTC Charts. [1][2]Diagnostic Trouble Code Descriptions
10. If no DTCs related to the concern are retrieved, GO to Symptom Chart. Symptom Related Diagnostic Procedures
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 1 and 4 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 (AM/FM) mode to enter the speaker walk-around test or self-diagnostic mode.
NOTE: 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.
3. To exit the test, turn the key to OFF, turn the audio unit off, or press preset button 1 for diagnostics.
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 carried out. This tests for concerns with Random Access Memory (RAM), Read-Only Memory (ROM) or Electrically Erasable Programmable Read-Only Memory (EEPROM).
- Preset button 2 = Continuous DTCs. This test enters diagnostics from the speaker walk-around test. This test displays any 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.
6. If the DTCs retrieved are related to the concern, go to DTC Charts. [1][2]Diagnostic Trouble Code Descriptions
7. If the concern remains and the fault is not detected, GO to Symptom Chart. Symptom Related Diagnostic Procedures
Satellite Audio Bezel Diagnostic Test
NOTE: To enter the test, the audio unit must be turned on and in SAT mode.
1. To enter the satellite audio bezel diagnostic test, simultaneously press the AUX button and preset button 2.
2. Upon entering the self-test, the audio unit produces 2 continuously alternating tones of different pitch, one for the right channel, then one for the left.
3. The test continues by displaying any DTCs currently present. If no DTCs are present, NO DTCs is displayed. If there are DTCs present, the audio unit auto-scrolls through the list of active DTCs.
4. Historical DTCs can be viewed by pressing the AUX button and preset button 2 simultaneously while in the active DTC mode.
- If any DTCs are present, pressing the AUX button and preset button 2 prompts CLEAR DTCs? on the audio unit display.
- To clear historical DTCs, press preset buttons 1, 2, and 3 consecutively within 4 seconds.
- To exit historical DTCs (with or without clearing DTCs), press the AUX button and preset button 2 simultaneously.
5. If no historical DTCs are present, pressing the AUX button and preset button 2 simultaneously while in active DTC mode displays the DLP software version.
6. To exit the satellite audio bezel diagnostic test, press the AUX button and preset button 2 simultaneously while the DLP software version is displayed, or turn the audio unit off.
7. If the concern remains and the fault is not detected, GO to Symptom Chart. Symptom Related Diagnostic Procedures