NO.7 ALC FUNCTION IS INOPERATIVE

id0903a1803600

7

ALC function is inoperative/16:Er12, 17:Er11

TROUBLESHOOTING HINTS

• Audio unit malfunction.
• CAN signal wiring harness malfunction.
• Open or short circuit in vehicle speed signal wiring harness (e. g., instrument cluster).

Note

• Inspect the ALC function while driving the vehicle with playing the CD, etc.

Diagnostic procedure

STEP

INSPECTION

ACTION

1
• Turn the ALC function to ON.
• Inspect the ALC function operation when driving the vehicle.
• Does the ALC system operate properly?.
Yes
The system is normal. Explains the ALC function to the customer.
No
Go to the next step.
2
• Retrieve the DTCs from all vehicle modules using the WDS or equivalent.
• Is there the following DTC displayed?
- Vehicle speed signal wiring harness
- CAN signal wiring harness
Yes
Go to the appropriate DTC inspection.
No
Replace the audio unit.