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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 P1804: Transfer Control Unit >> 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. PERFORM SELF-DIAGNOSIS 

    SYMBOL CONSULT

    1. Erase self-diagnostic results for "ALL MODE AWD/4WD".
    2. Turn the ignition switch OFF, and then wait 10 seconds and more.
    3. Select "Self Diagnostic Result" mode of "ALL MODE AWD/4WD".

    Is DTC "P1804" detected?

    YES

    Replace transfer control unit. Refer to Removal and Installation .

    NO

    Check transfer control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace error-detected parts.

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