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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 P1721: Vehicle Speed Signal >> 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 DTC OF ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) 

    Perform "Self Diagnostic Results" in "ABS".

    Is any DTC detected?

    YES

    Check DTC detected item. Refer to DTC Index .

    NO

    GO TO 2 .

  2. CHECK DTC OF TCM 

    Perform "Self Diagnostic Results" in "TRANSMISSION".

    Is any DTC other than "P1721" detected?

    YES

    Check DTC detected item. Refer to DTC Index

    NO

    INSPECTION END

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