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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 >> Power Supply And Ground Circuit >> Sonar Control Unit (With Around View Monitor) >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK FUSE

    Check for blown fuses.

    Power source Fuse No.
    Ignition switch ON or START 4

    Is the inspection result normal?

    YES 

    GO TO STEP 2  .

    NO 

    Be sure to eliminate cause of malfunction before installing new fuse.

  2. CHECK POWER SUPPLY CIRCUIT

    1. Turn ignition switch ON.
    2. Check voltage between sonar control unit harness connector and ground.
      Sonar control unit Ground Voltage
      (Approx.)
      Connector Terminal
      M47 13 Battery voltage

    Is the inspection result normal?

    YES 

    GO TO STEP 3  .

    NO 

    Repair or replace sonar control unit power supply harness.

  3. CHECK GROUND CIRCUIT

    1. Turn ignition switch OFF.
    2. Disconnect sonar control unit connector.
    3. Check continuity between sonar control unit harness connector and ground.
      Sonar control unit Ground Continuity
      Connector Terminal
      M47 24 Existed

    Is the inspection result normal?

    YES 

    INSPECTION END

    NO 

    Repair or replace sonar control unit ground harness.

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