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Home >> Infiniti >> 2016 >> QX50 RWD >> Repair and Diagnosis >> Accessories & Equipment >> Entertainment Systems >> Audio, Visual & Navigation System (BOSE Audio With Navigation) (Diagnostic Trouble Codes (DTCS) B272C-U1310 And Circuit Diagnosis) >> DTC/Circuit Diagnosis >> Power Supply And Ground Circuit >> BOSE Amp. >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK FUSE

    Check for blown fuses.

    Power source Fuse No.
    Battery 8

    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

    Check voltage between BOSE amp. harness connector and ground.

    Signal name Connector No. Terminal No. Ignition switch position Value (Approx.)
    Battery power supply B42 11 OFF Battery voltage

    Is the inspection result normal?

    YES 

    GO TO STEP 3  .

    NO 

    Check harness between BOSE amp. and fuse.

  3. CHECK GROUND CIRCUIT

    1. Turn ignition switch OFF.
    2. Disconnect BOSE amp. connector.
    3. Check continuity between BOSE amp. harness connector and ground.
      Signal name Connector No. Terminal No. Ignition switch position Continuity
      Ground B42 12 OFF Existed

    Is the inspection result normal?

    YES 

    INSPECTION END

    NO 

    Repair harness or connector.

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