NO.7 ALC FUNCTION IS INOPERATIVE [AUDIO]

id0903e1803600

7

ALC function is inoperative/Possible DTC: —

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.

7	ALC function is inoperative/Possible DTC: —
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.
1		No	Go to the next step.
2	• Retrieve the DTCs from all vehicle modules using the M-MDS. • Is there the following DTC displayed? ― Vehicle speed signal wiring harness ― CAN signal wiring harness	Yes	Go to the appropriate DTC inspection.
2		No	Replace the audio unit.