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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 64 (Multi Av System (NAVI With BOSE) (DTC/Circuit Diagnosis)) >> DTC/Circuit Diagnosis >> DTC U1721: Woofer >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2018 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK SOUND SIGNAL CIRCUITS FOR OPEN OR SHORT TO GROUND 
    1. Turn ignition switch OFF.
    2. Disconnect BOSE speaker amp. connector B110 and suspect rear subwoofer connector.
    3. Check the continuity between BOSE speaker amp. connector B110 and suspect rear subwoofer connector.

      BOSE speaker amp.

      Rear subwoofer

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      B110

      5

      B106 (LH)

      1

      Yes

      6

      2

      1

      B107 (RH)

      1

      2

      2

    4. Check the continuity between BOSE speaker amp. connector B110 and ground.

      BOSE speaker amp.

      Continuity

      Connector

      Terminal

      Ground

      B110

      5

      -

      No

      6

      1

      2

    Is the inspection result normal?

    YES

    GO TO 2 .

    NO

    Repair or replace harness or connectors.

  2. CHECK SOUND SIGNAL CIRCUITS FOR SHORT 

    Check the continuity between the terminals of BOSE speaker amp. connector B110 for the suspect rear subwoofer.

    BOSE speaker amp.

    Rear subwoofer

    Continuity

    Connector

    Terminal

    B110

    5

    6

    LH

    No

    1

    2

    RH

    Is the inspection result normal?

    YES

    GO TO 3 .

    NO

    Repair or replace harness or connectors.

  3. CHECK SOUND SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY 
    1. Turn ignition switch ON.
    2. Check the voltage between BOSE speaker amp. connector B110 and ground for the suspect rear subwoofer.

      BOSE speaker amp.

      Ground

      Rear subwoofer

      Voltage

      Connector

      Terminal

      B110

      5

      -

      LH

      0 V

      6

      1

      RH

      2

    Is the inspection result normal?

    YES

    Replace rear subwoofer. Refer to Removal and Installation .

    NO

    Repair or replace harness or connectors.