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2008 - MX-5 - Body and Accessories

NO.7 ALC FUNCTION IS INOPERATIVE [AUDIO]



7

ALC function is inoperative / Possible DTC: —

    Troubleshooting hints
  • Audio unit 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. (ALC level 3)

  • Does the ALC system operate properly?.

Yes

The system is normal. Explain the ALC function to the customer.

No

Go to the next step.

2

  • Verify the connection of the audio unit connector (24-pin, vehicle speed signal).

  • Inspect both the audio unit and wiring harness-side connector terminal 1I for a poor connection (such as damaged/pulled-out pins, corrosion).

  • Are all the pins normal?

Yes

Repair or replace the pins and/or connector.

No

Replace the audio unit.

(See CENTER PANEL UNIT REMOVAL/INSTALLATION.)

(See CENTER PANEL UNIT DISASSEMBLY/ASSEMBLY.)

(See AUDIO UNIT DISASSEMBLY/ASSEMBLY.)




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