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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 211 (Engine Control System (DTC/Circuit Diagnosis) (CUMMINS 5.0L) (1 Of 6)) >> DTC/Circuit Diagnosis >> DTC U0101-00: Can Comm Circuit >> 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 PRIORITY 
    1. Turn ignition switch ON.
    2. Connect CONSULT and check for ENGINE diagnostic trouble codes.
    3. Check for DTC U0101 being current on the CONSULT screen.

    s DTC U0101-00detected as current?

    YES

    GO TO 2 .

    NO

    Refer to Intermittent Incident .

  2. CHECK DTC PRIORITY 
    1. Turn ignition switch ON.
    2. Connect CONSULT and check for ENGINE diagnostic trouble codes.
    3. Check for DTC being current on the CONSULT screen.

    Are multiple DTCs detected as current?

    YES

    A CAN issue has been detected. Check the following:

    • Terminating resistances
    • IPDM E/R
    • Harness and connectors

    NO

    A TCM issue has been detected. Check the following:

    • TCM to data link connection
    • Voltage to TCM
    • Harness and connectors
    • Malfunctioning TCM
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