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Home >> Infiniti >> 2016 >> Q50 Base, RWD >> Repair and Diagnosis >> Accessories & Equipment >> Infotainment >> Audio, Visual & Navigation System (INFINITI INTOUCH) (DTC/Circuit Diagnosis) (Except Hybrid) >> DTC/Circuit Diagnosis >> Microphone Signal Circuit >> Without Telematics System >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK MICROPHONE SIGNAL

    1. Turn ignition switch ON.
    2. Check the signal between display control unit harness connector terminal as per the following condition.
      Display control unit  
      Condition      		 Reference value
      Connector Terminals
      (+) (-)
      Terminal
      M101 71 52 Give a voice.
      G04124472Courtesy of NISSAN NORTH AMERICA, INC.

    Is the inspection result normal?

    YES 

    Replace display control unit. Refer to REMOVAL AND INSTALLATION .

    NO 

    GO TO STEP 2  .

  2. CHECK VOLTAGE MICROPHONE VCC

    1. Turn ignition switch OFF.
    2. Disconnect microphone harness connector.
    3. Turn ignition switch ON.
    4. Check the voltage between microphone harness connector.
    Microphone Voltage
    (Approx.)
    Connector Terminals
    (+) (-)
    Terminal
    R12 4 2 5.0 V

    Is the inspection result normal?

    YES 

    Replace microphone. Refer to REMOVAL AND INSTALLATION .

    NO 

    GO TO STEP 3  .

  3. CHECK MICROPHONE CIRCUIT FOR OPEN

    1. Disconnect display control unit harness connector.
    2. Check continuity between display control unit harness connector and microphone harness connector.
      Display control unit Microphone Continuity
      Connector Terminals Connector Terminals
      M101 52 R12 2 Existed
      71 1
      72 4

    Is the inspection result normal?

    YES 

    GO TO STEP 4  .

    NO 

    Repair or replace malfunctioning parts.

  4. CHECK MICROPHONE CIRCUIT FOR SHORT

    Check the continuity between display control unit harness connector and ground.

    Terminals Continuity
    (+) (-)
    Display control unit
    Connector Terminals
    M101 72 Ground Not existed
    87

    Is the inspection result normal?

    YES 

    Replace display control unit. Refer to REMOVAL AND INSTALLATION .

    NO 

    Repair or replace malfunctioning parts.

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