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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 202 (Automatic Transmission (DTC/Circuit Diagnosis) (Re6R01A)) >> DTC/Circuit Diagnosis >> DTC P0826: Up And Down Shift SW >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2018 Nissan Titan XD. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK CONNECTOR 

    Check the metal deposition, damage, and corrosion of connectors (M24 and M68).

    Is the inspection result normal?

    YES

    GO TO 2 .

    NO

    Repair or replace malfunctioning parts.

  2. CHECK TCM INPUT SIGNAL 
    1. Turn ignition switch ON.
    2. Select "Manual mode (-) 1" and "Manual mode (+) 1" in "Data Monitor" in "TRANSMISSION".
    3. Check the ON/OFF operations of each monitor item.

      Monitor Item

      Condition

      Status

      Manual mode (-) 1

      Press the manual mode switch (- side)

      ON

      Other than the above

      OFF

      Manual mode (+) 1

      Press the manual mode switch (+ side)

      ON

      Other than the above

      OFF

    Is the inspection result normal?

    YES

    INSPECTION END

    NO

    GO TO 3 .

  3. CHECK COMBINATION METER INPUT SIGNAL 

    Check voltage between combination meter harness connector terminals and ground.

    combination meter

    Condition

    Voltage (Approx.)

    Connector

    Terminal

    +

    -

    M24

    32

    Ground

    Ignition switch: ON

    Press the manual mode switch (+ side)

    0 V

    Other than the above

    Battery voltage

    33

    Press the manual mode switch (- side)

    0 V

    Other than the above

    Battery voltage

    Is the inspection result normal?

    YES

    Check combination meter. Refer to Work flow (TYPE A), Work flow (TYPE B).

    NO

    GO TO 4 .

  4. 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

      7

      M24

      33

      Existed

      8

      32

    Is the inspection result normal?

    YES

    GO TO 5 .

    NO

    Repair or replace malfunctioning parts.

  5. 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

    32

    Ground

    Not existed

    33

    Is the inspection result normal?

    YES

    GO TO 6 .

    NO

    Repair or replace malfunctioning parts.

  6. 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

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

    NO

    Repair or replace malfunctioning parts.