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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 7 (Automatic Transmission (DTC/Circuit Diagnosis) (Re7R01B)) >> DTC/Circuit Diagnosis >> DTC P1721: Vehicle Speed Signal >> DTC Diagnosis Procedure

DTC Diagnosis Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK DTC OF UNIFIED METER AND A/C AMP. 

    SYMBOL With CONSULT

    Perform "Self Diagnostic Results" in "METER/M&A".

    Is any DTC detected?

    YES

    Check DTC detected item. Refer to DTC Index .

    NO

    GO TO 2.

  2. CHECK DTC OF TCM 

    SYMBOL With CONSULT

    Perform "Self Diagnostic Results" in "TRANSMISSION".

    Is any DTC other than "P1721" detected?

    YES

    Check DTC detected item. Refer to DTC Index .

    NO

    Replace the control valve & TCM. Refer to Removal and Installation .

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