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Home >> Infiniti >> 2015 >> QX80 Base, AWD >> Repair and Diagnosis >> Accessories & Equipment >> Infotainment >> Audio, Visual & Navigation System (BOSE Audio With Navigation) (Diagnostic Trouble Codes (DTCS) U1207-B272C, Symptom Tests And R & I) >> DTC/Circuit Diagnosis >> Steering Switch Signal A Circuit >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK STEERING SWITCH SIGNAL A CIRCUIT

    1. Disconnect AV control unit connector and spiral cable connector.
    2. Check continuity between AV control unit harness connector and spiral cable harness connector.
      AV control unit Spiral cable Continuity
      Connector Terminal Connector Terminal
      M208 6 M33 24 Existed
    3. Check continuity between AV control unit harness connector and ground.
      AV control unit Ground Continuity
      Connector Terminal
      M208 6 Not existed

    Is the inspection result normal?

    YES 

    GO TO STEP 2  .

    NO 

    Repair harness or connector.

  2. CHECK SPIRAL CABLE

    Check spiral cable.

    Is the inspection result normal?

    YES 

    GO TO STEP 3. 

    NO 

    Replace spiral cable. Refer to EXPLODED VIEW .

  3. 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.
      (+) (-) Voltage
      (Approx.)
      AV control unit AV control unit
      Connector Terminal Connector Terminal
      M208 6 M208 15 5.0 V

    Is the inspection result normal?

    YES 

    GO TO STEP 4. 

    NO 

    Replace AV control 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 wheel. Refer to EXPLODED VIEW .