NO.7 ALC FUNCTION IS INOPERATIVE [AUDIO]

id0903e1803600

7

ALC function is inoperative

Possible DTC

—

Possible cause

•  Audio unit malfunction

•  Instrument cluster malfunction

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

Note

•  Inspect the ALC function while driving the vehicle and playing a CD.

7	ALC function is inoperative
Possible cause	• Audio unit malfunction • Instrument cluster malfunction • Open or short circuit in vehicle speed signal wiring harness (e. g., instrument cluster) Note • Inspect the ALC function while driving the vehicle and playing a CD.

Diagnostic procedure

STEP	INSPECTION		ACTION
1	• Turn the ALC function on. • Inspect the ALC function operation while driving the vehicle. • Does the ALC system operate properly?	Yes	The system is normal.Explain the ALC function to the customer.
1		No	Go to the next step.
2	• Verify that the speedometer operation. • Does the speedometer indicate vehicle speed correctly?	Yes	Go to the next step.
2		No	Go to the instrument cluster symptom troubleshooting “No.7 Speedometer indication is defective.” procedure.
3	• Inspect for open or short circuit in wiring between the audio unit (24-pin) terminal 1I and instrument cluster terminal 2O. • Is the open or short circuit detected?	Yes	Repair or replace for open or short circuit.
3		No	Replace the audio unit. (See CENTER PANEL UNIT REMOVAL/INSTALLATION.) (See CENTER PANEL UNIT DISASSEMBLY/ASSEMBLY.)

7	ALC function is inoperative
Possible DTC	—
Possible cause	• Audio unit malfunction • Instrument cluster malfunction • Open or short circuit in vehicle speed signal wiring harness (e. g., instrument cluster) Note • Inspect the ALC function while driving the vehicle and playing a CD.