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Audio System Symptom Troubleshooting - Audio unit button illumination does not work
Audio unit button illumination does not work
NOTE:
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Check for B-CAN DTCs and resolve them before troubleshooting. |
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Check the connectors for poor connections or loose terminals. |
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1. |
Problem verification:
Problem verification
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?1. |
Turn the vehicle to the ON mode. |
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?2. |
Turn the combination lighting switch to the parking light position (  ). |
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?3. |
Check if the audio unit buttons are illuminated. | |
Are the buttons illuminated?
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Intermittent failure, the audio unit is OK at this time.? |
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The failure is duplicated, go to step 2. |
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2. |
Determine possible failure area (interior lights circuit, others):
Determine possible failure area (interior lights circuit, others)
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?1. |
Check if several other buttons that are not related to the audio system are illuminated. | |
Are the buttons illuminated?
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Troubleshoot the interior lights.? |
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3. |
Open wire check (B-CAN_H, B-CAN_L lines):
Open wire check (B-CAN_H, B-CAN_L lines)
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?1. |
Turn the combination lighting switch off. |
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?2. |
Turn the vehicle to the OFF (LOCK) mode. |
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?3. |
Disconnect the following connectors.
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Audio unit connector B (20P) |
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Gauge control module connector A (32P) | |
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?4. |
Check for continuity between test points 1 and 2.
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Test condition |
Vehicle OFF (LOCK) mode |
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Audio unit connector B (20P): disconnected |
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Gauge control module connector A (32P): disconnected |
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Test circuit 1 |
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Test point 1 |
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Test point 2 |
Gauge control module connector A (32P) No. 31 | |
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Test circuit 2 |
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Test point 1 |
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Test point 2 |
Gauge control module connector A (32P) No. 30 | |
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Is there continuity?
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Repair an open in the wire(s) between the audio unit and the gauge control module.? | | 