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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.