Power Supply and Ground Circuit

POWER SUPPLY AND GROUND CIRCUIT


MICROPHONE : Diagnosis Procedure

Regarding Wiring Diagram information, Electrical Diagrams.
1.CHECK POWER SUPPLY CIRCUIT





Check voltage between microphone harness connector R109 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 R109
(A) terminal 4 and AV control unit harness connector M45 (B) terminal 70.





4. Check continuity between microphone harness connector R109
(A) terminal 4 and ground.





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





1. Turn ignition switch OFF.
2. Disconnect microphone harness connector R109 and AV control unit harness connector M45.
3. Check continuity between microphone harness connector R109
(A) terminal 2 and AV control unit harness connector M45 (B) terminal 71.





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