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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 199 (Transfer Case (DTC/Circuit Diagnosis)) >> DTC/Circuit Diagnosis >> DTC P1813: 4WD Mode Switch >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2018 Nissan Titan XD and 2018 Nissan Titan. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK 4WD SHIFT SWITCH 

    Check 4WD shift switch. Refer to Component Inspection .

    Is the inspection result normal?

    YES

    GO TO 2 .

    NO

    Replace 4WD shift switch. Refer to Removal and Installation .

  2. CHECK 4WD SHIFT SWITCH CIRCUIT (1) 
    1. Disconnect transfer control unit harness connector.
    2. Check the continuity between transfer control unit harness connector and 4WD shift switch harness connector.

    Transfer control unit

    4WD shift switch

    Continuity

    Connector

    Terminal

    Connector

    Terminal

    E142

    18

    M141

    3

    No

    4

    Yes

    6

    No

    7

    No

    19

    3

    No

    4

    No

    6

    Yes

    7

    No

    20

    3

    No

    4

    No

    6

    No

    7

    Yes

    Is the inspection result normal?

    YES

    GO TO 3 .

    NO

    Repair or replace error-detected parts.

  3. CHECK 4WD SHIFT SWITCH CIRCUIT (2) 

    Check the continuity between 4WD shift switch harness connector and ground.

    4WD shift switch

    -

    Continuity

    Connector

    Terminal

    M141

    4

    Ground

    No

    6

    7

    Is the inspection result normal?

    YES

    Replace transfer control unit. Refer to Removal and Installation .

    NO

    Repair or replace error-detected parts.