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Home >> Infiniti >> 2017 >> Q50 Base, RWD >> 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 U125D: NAVI 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 USB HARNESS CONNECTION

    1. Turn ignition switch OFF.
    2. Visually check USB harness connector between display control unit and NAVI control unit.

    Is the inspection result normal?

    YES 

    GO TO STEP 2  .

    NO 

    Replace USB harness.

  2. CHECK NAVI CONTROL UNIT POWER SUPPLY AND GROUND CIRCUIT

    Check NAVI control unit power supply and ground circuit. Refer to DIAGNOSIS PROCEDURE .

    Is the inspection result normal?

    YES 

    Replace NAVI control unit. Refer to REMOVAL AND INSTALLATION .

    NO 

    Repair or replace malfunctioning parts.

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