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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 591 (Audio System (INFINITI INTOUCH) (DTC/Circuit Diagnosis)) >> DTC/Circuit Diagnosis >> DTC U1249: Audio H/U Conn >> Diagnosis Procedure >> With BOSE Audio System And Without BOSE Audio System

With BOSE Audio System And Without BOSE Audio System

WARNING: This page is about a different car, the 2020 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK AV CONTROL UNIT POWER SUPPLY AND GROUND CIRCUIT 

    Check AV control unit power supply and ground circuit. Refer to Diagnosis Procedure .

    Is the inspection result normal?

    YES

    GO TO 2.

    NO

    Repair or replace malfunctioning parts.

  2. CHECK AV COMMUNICATION CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect AV control unit connector M164 and display control unit connector M92.
    3. Check the continuity between display control unit connector M92 and AV control unit connector M164.

      Display control unit

      AV control unit

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      M92

      6

      M164

      67

      Yes

      18

      87

    Is the inspection result normal?

    YES

    Replace AV control unit. Refer to Removal and Installation .

    NO

    Repair or replace malfunctioning parts.