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 STEERING SWITCH SIGNAL GND CIRCUIT
1. Disconnect AV control unit connector and spiral cable connector.
2. Check continuity between AV control unit harness connector terminal 15 and spiral cable harness connector terminal 27.
  15 - 27: Continuity should exist.
Is the inspection result normal?

Yes: GO TO 2.

No: Repair harness or connector.
CHECK SPIRAL CABLE
Check spiral cable.

Is the inspection result normal?

Yes: GO TO 3.

No: Replace spiral cable.
CHECK GROUND CIRCUIT
1. Connect AV control unit connector.
2. Check continuity between AV control unit harness connector terminal 15 and ground.
  15 - Ground: Continuity should exist.
Is the inspection result normal?

Yes: GO TO 4.

No: Replace AV control unit.
CHECK STEERING SWITCH
1. Turn ignition switch OFF.
2. Check steering switch. Refer to COMPONENT INSPECTION .
Is the inspection result normal?

Yes: INSPECTION END

No: Replace steering switch.