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Home >> Infiniti >> 2012 >> G25 Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 93 (Audio, Visual And Navigation System) >> Base Audio >> DTC/Circuit Diagnosis >> Steering Switch Signal A Circuit >> Diagnosis Procedure
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Diagnosis Procedure

WARNING: This page is about a different car, the 2011 Nissan 370Z. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK STEERING SWITCH SIGNAL A CIRCUIT
    1. Turn ignition switch OFF.
    2. Disconnect audio unit connector and spiral cable connector.
    3. Check continuity between audio unit harness connector and spiral cable harness connector.
      CONTINUITY SPECIFICATION

      Audio unit Spiral cable Continuity
      Connector Terminal Connector Terminal
      M80 6 M36 24 Existed
    4. Check continuity between audio unit harness connector and ground.
      CONTINUITY SPECIFICATION

      Audio unit Ground Continuity
      Connector Terminal
      M80 6 Not existed

      Is the inspection result normal? 

      YES: Go to 2.

      NO: Repair harness or connector.

  2. CHECK SPIRAL CABLE

    Check spiral cable.

    Is the inspection result normal? 

    YES: Go to 3.

    NO: Replace spiral cable. Refer to "REMOVAL AND INSTALLATION ".

  3. CHECK AUDIO UNIT VOLTAGE
    1. Connect audio unit connector and spiral cable connector.
    2. Turn ignition switch ON.
    3. Check voltage between audio unit harness connector.
    VOLTAGE SPECIFICATION

    (+) (-) Voltage (Approx.)
    Audio unit Audio unit
    Connector Terminal Connector Terminal
    M80 6 M80 15 5.0 V

    Is the inspection result normal? 

    YES: Go to 4.

    NO: Replace audio unit. Refer to "REMOVAL AND INSTALLATION ".

  4. 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. Refer to "REMOVAL AND INSTALLATION ".