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Audio System Symptom Troubleshooting - Multi-information display or touch screen does not dim or brighten with dimmer
Multi-information display or touch screen does not dim or brighten with dimmer
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 light switch to the parking light position (  ). |
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?3. |
Rotate the dashlights brightness controller knob several times. | |
Does the multi-information display brightness change?
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Intermittent failure, the system is OK at this time.? |
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The failure is duplicated, go to step 2. |
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The failure is duplicated, go to step 3. |
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2. |
Open wire check (B-CAN_H line, B-CAN_L line):
Open wire check (B-CAN_H line, B-CAN_L line)
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?1. |
Turn the combination light 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 A (24P): disconnected |
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Gauge control module connector A (32P): disconnected |
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Test point 1 |
Audio unit connector B (20P) No. 13 |
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Test point 2 |
Gauge control module connector A (32P) No. 30 | |
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Test point 1 |
Audio unit connector B (20P) No. 3 |
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Test point 2 |
Gauge control module connector A (32P) No. 31 | |
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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.? |
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3. |
Open wire check (B-CAN_H line, B-CAN_L line):
Open wire check (B-CAN_H line, B-CAN_L line)
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?1. |
Turn the combination light 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-navigation 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 mode |
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Audio-navigation unit connector B (20P): disconnected |
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Gauge control module connector A (32P): disconnected |
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Test point 1 |
Audio-navigation unit connector B (20P) No. 13 |
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Test point 2 |
Gauge control module connector A (32P) No. 30 | |
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Test point 1 |
Audio-navigation unit connector B (20P) No. 3 |
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Test point 2 |
Gauge control module connector A (32P) No. 31 | |
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Is there continuity?
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Repair an open in the wire(s) between the audio-navigation unit and the gauge control module.? | | 