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 A CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect AV control unit connector and spiral cable connector.
3. Check continuity between AV control unit harness connector terminal 6 and spiral cable harness connector terminal 33.
  6 - 33: Continuity should exist.
4. Check continuity between AV control unit harness connector terminals 6 and ground.
  6 - Ground: Continuity should not 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 AV CONTROL UNIT VOLTAGE
1. Connect AV control unit connector and spiral cable connector.
2. Turn ignition switch ON.
3. Check voltage between AV control unit harness connector terminals 6 and 15.
  6 - 15: Approx. 5 V
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.