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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 523 (Automatic Transmission (Re7R01B) (DTC/Circuit Diagnosis)) >> DTC/Circuit Diagnosis >> Tow Mode System >> DTC Diagnosis Procedure

DTC Diagnosis Procedure

WARNING: This page is about a different car, the 2019 Nissan NV3500 HD and 2019 Nissan NV2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK TCM INPUT SIGNAL 
    1. Turn ignition switch ON.
    2. Select "TOW MODE SWITCH" in "Data Monitor" in "TRANSMISSION".
    3. Check the ON/OFF operations of each monitor item.

      Monitor Item

      Condition

      Status

      TOW MODE SWITCH

      TOW mode switch: Pushed

      ON

      Other than the above

      OFF

    Is the inspection result normal?

    YES

    Check intermittent incident. Refer to Intermittent Incident .

    NO

    GO TO 2.

  2. CHECK CIRCUIT BETWEEN COMBINATION METER AND A/T SHIFT SELECTOR 
    1. Turn ignition switch OFF.
    2. Disconnect combination meter connector and A/T shift selector connector.
    3. Check continuity between A/T shift selector harness connector terminals and combination meter harness connector terminals.

      A/T shift selector

      Combination meter

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      M68

      6

      M24

      10

      Existed

    Is the inspection result normal?

    YES

    GO TO 3.

    NO

    Repair or replace malfunctioning parts.

  3. CHECK CIRCUIT BETWEEN COMBINATION METER AND A/T SHIFT SELECTOR 

    Check continuity between combination meter harness connector terminals and ground.

    Combination meter

    --

    Continuity

    Connector

    Terminal

    M24

    10

    Ground

    Not existed

    Is the inspection result normal?

    YES

    GO TO 4.

    NO

    Repair or replace malfunctioning parts.

  4. CHECK A/T SHIFT SELECTOR GROUND CIRCUIT 

    Check continuity between A/T shift selector connector harness connector terminals and ground.

    A/T shift selector

    --

    Continuity

    Connector

    Terminal

    M68

    2

    Ground

    Existed

    Is the inspection result normal?

    YES

    GO TO 5.

    NO

    Repair or replace malfunctioning parts.

  5. CHECK COMBINATION METER 

    Check combination meter. Refer to Work Flow .

    Is the inspection result normal?

    YES

    Replace the A/T shift selector. Refer to Removal and Installation .

    NO

    Replace the combination meter. Refer to Removal and Installation .