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Home >> Infiniti >> 2017 >> QX70 AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 225 (Audio, Visual & Navigation System (INFINITI INTOUCH) (Diagnostic Trouble Codes (DTCS) B1F10-U1725 And Circuit Diagnosis) (Hybrid)) >> DTC / Circuit Diagnosis >> DTC U124E: Amp Conn >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2016 Infiniti Q50. However, it is still accessible from the selected car via links, so may be relevant.

  1. CHECK BOSE AMP. POWER SUPPLY AND GROUND CIRCUIT

    Check BOSE amp. power supply and ground circuit. Refer to DIAGNOSIS PROCEDURE .

    Is the inspection result normal?

    YES 

    GO TO STEP 2  .

    NO 

    Repair or replace malfunctioning parts.

  2. CHECK AV COMMUNICATION CIRCUIT

    1. Turn ignition switch OFF.
    2. Disconnect display control unit harness connector and BOSE amp. harness connector.
    3. Check the continuity between display control unit harness connector and BOSE amp. harness connector.
      Display control unit BOSE amp. Continuity
      Connector Terminal Connector Terminal
      M100 16 B55 54 Existed
      28 74

    Is the inspection result normal?

    YES 

    Replace BOSE amp. Refer to REMOVAL AND INSTALLATION .

    NO 

    Repair or replace malfunctioning parts.

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