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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 549 (Audio, Visual & Navigation System (DTC/Circuit Diagnosis)) >> DTC/Circuit Diagnosis >> DTC B1311: Rear Left Speaker >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2019 Nissan NV3500 HD, 2019 Nissan NV2500 HD, and 2019 Nissan NV1500. However, it is still accessible from the selected car via links, so may be relevant.
  1. DETERMINE MALFUNCTION TYPE 

    SYMBOL With CONSULT

    1. Turn ignition switch ON.
    2. Turn ignition switch OFF and wait at least 30 seconds.
    3. Turn ignition switch ON and wait at least 30 seconds or more.
    4. Select "Self Diagnostic Result" mode of "MULTI AV" using CONSULT.
    5. Check DTC.

    Is DTC B1311 detected?

    YES

    GO TO 2.

    YES

    GO TO 3.

    YES

    GO TO 4.

    NO

    Refer to Intermittent Incident .

  2. CHECK SOUND SIGNAL CIRCUITS FOR OPEN OR SHORT TO GROUND 
    1. Turn ignition switch OFF.
    2. Disconnect audio unit connector M50 and rear speaker LH connector.
    3. Check the continuity between audio unit connector M50 and rear speaker LH connector B12.

      Audio unit

      Rear speaker LH

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      M50

      4

      B12

      1

      Yes

      5

      2
    4. Check the continuity between audio unit connector M50 and ground.

      Audio unit

      Continuity

      Connector

      Terminal

      Ground

      M50

      4

      --

      No

      5

    Is the inspection result normal?

    YES

    Replace rear speaker LH. Refer to Removal and Installation .

    NO

    Repair or replace harness or connectors.

  3. CHECK SOUND SIGNAL CIRCUITS FOR SHORT 
    1. Turn ignition switch OFF.
    2. Disconnect audio unit connector M50 and rear speaker LH connector.
    3. Check the continuity between the terminals of audio unit connector M50.

      Audio unit

      Continuity

      Connector

      Terminal

      M50

      4

      5

      No

    Is the inspection result normal?

    YES

    Replace rear speaker LH. Refer to Removal and Installation .

    NO

    Repair or replace harness or connectors.

  4. CHECK SOUND SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY 
    1. Turn ignition switch OFF.
    2. Disconnect audio unit connector M50 and rear speaker LH connector.
    3. Turn ignition switch ON.
    4. Check the voltage between audio unit connector M50 and ground.

      Audio unit

      Ground

      Voltage

      Connector

      Terminal

      M50

      4

      --

      0 V

      5

    Is the inspection result normal?

    YES

    Replace rear speaker LH. Refer to Removal and Installation .

    NO

    Repair or replace harness or connectors.

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