With Navigation

POWER SUPPLY AND GROUND CIRCUIT (COUPE)


MICROPHONE : Diagnosis Procedure

Regarding Wiring Diagram information, refer to With Navigation System.
1.CHECK POWER SUPPLY CIRCUIT





Check voltage between microphone harness connector R7 terminal
4 and ground.





Is approximately 5V present?
YES - GO TO 3.
NO - GO TO 2.
2.CHECK POWER SUPPLY CIRCUIT (CONTINUITY)





1. Turn ignition switch OFF.
2. Disconnect microphone and AV control unit harness connectors.
3. Check continuity between microphone harness connector R7
(A) terminal 4 and AV control unit harness connector M121 (B) terminal 44.





4. Check continuity between microphone harness connector R7
(A) terminal 4 and ground.





Are the continuity test results as specified?
YES - Replace the AV control unit. Refer to AV Control Unit.
NO - Repair harness or connector.
3.CHECK GROUND CIRCUIT





1. Turn ignition switch OFF.
2. Disconnect microphone harness connector R7 and AV control unit harness connector M121.
3. Check continuity between microphone harness connector R7
(A) terminal 2 and AV control unit harness connector M121 (B) terminal 43.





Does continuity exist?
YES - Inspection End.
NO - Repair harness or connector.