Diagnosis Procedure
WARNING: This page is about a different car, the 2008 Infiniti M45 and 2008 Infiniti M35. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK FUSE
Check for blown fuses.
FUSES SPECIFICATIONSPower source Fuse No. Battery 37 Ignition switch ACC or ON 6 Ignition switch ON or START 12 Is the inspection result normal?
Yes: GO TO 2.
No: Be sure to eliminate cause of malfunction before installing new fuse.
- CHECK POWER SUPPLY CIRCUIT
Check voltage between AV control unit harness connectors and ground.
CONNECTOR TERMINAL VALUE TABLESignal name Connector No. Terminal No. Ignition switch position Value (Approx.) Battery power supply M76 19 OFF Battery voltage M78 22 24 ACC power supply M76 7 ACC Battery voltage M78 25 Ignition signal M78 35 ON Battery voltage Is the inspection result normal?
Yes: GO TO 3.
No: Check harness between AV control unit and fuse.
- CHECK GROUND CIRCUIT
- Turn ignition switch OFF.
- Disconnect AV control unit connectors.
- Check continuity between AV control unit harness connectors and ground.CONNECTOR TERMINAL CONTINUITY TABLE
Signal name Connector No. Terminal No. Ignition switch position Continuity Ground M78 21 OFF Existed 23
Is the inspection result normal?
Yes: INSPECTION END
No: Repair harness or connector.