NO.7 ALC FUNCTION IS INOPERATIVE [AUDIO]
id0903e1803600
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7 |
ALC function is inoperative/Possible DTC: 16:Er12 / Device code 16/error code 12 |
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Troubleshooting hints
• Open or short circuit in vehicle speed signal wiring harness (e. g., instrument cluster)
• CAN signal wiring harness malfunction
• Audio unit/car-navigation unit malfunction
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Diagnostic procedure
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STEP |
INSPECTION |
ACTION |
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1
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• Turn the ALC function to ON.
• Inspect the ALC function operation when driving the vehicle at ALC level 3.
• Does the ALC system operate properly?
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Yes
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The system is normal. Explains the ALC function to the customer.
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No
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Go to the next step.
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2
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• Inspect the connection of the audio unit/car-navigation unit connector (24-pin, vehicle speed signal).
• Inspect both the audio unit/car-navigation unit and wiring harness-side connector terminal I (24-pin) for poor connection (such as damaged/pulled-out pins, corrosion).
• Are all the pins normal?
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Yes
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Go to the appropriate DTC inspection.
Repair or replace the pins and/or the connector.
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No
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Replace the audio unit/car-navigation unit.
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