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Home >> Infiniti >> 2012 >> G25 Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 93 (Audio, Visual And Navigation System) >> BOSE Audio Without Navigation >> DTC/Circuit Diagnosis >> Steering Switch Signal GND Circuit (Tel Adapter Unit To Audio Unit) >> 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 GND CIRCUIT
    1. Turn ignition switch OFF.
    2. Disconnect audio unit connector and TEL adapter unit connector.
    3. Check continuity between audio unit harness connector and TEL adapter unit harness connector.
    CONTINUITY SPECIFICATION

    Audio unit TEL adapter unit Continuity
    Connector Terminal Connector Terminal
    M81 15 B237 19 Existed

    Is the inspection result normal? 

    YES: Go to 2.

    NO: Repair harness or connector.

  2. CHECK GROUND CIRCUIT
    1. Connect audio unit connector.
    2. Check continuity between audio unit harness connector and ground.
    CONTINUITY SPECIFICATION

    Audio unit Ground Continuity
    Connector Terminal
    M81 15 Existed

    Is the inspection result normal? 

    YES: Go to 3.

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

  3. CHECK STEERING SWITCH

Check steering switch. Refer to "COMPONENT INSPECTION ".

Is the inspection result normal? 

YES: INSPECTION END

NO: Replace steering switch. Refer to "REMOVAL AND INSTALLATION ".