Nissan Maxima Service and Repair Manual: U0100 lost communication (ECM A)

DTC Logic

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.PREPARATION BEFORE WORK

If another "DTC CONFIRMATION PROCEDURE" occurs just before, turn ignition switch OFF and wait for at least 10 seconds, then perform the next test.

2.PERFORM DTC CONFIRMATION PROCEDURE

  1.  Start the engine and wait for at least 5 seconds.
  2.  Check the first trip DTC.

Diagnosis Procedure

For the diagnosis procedure, refer to LAN-15, "Trouble Diagnosis Flow Chart".

    DTC/circuit diagnosis
    ...

    U1000 CAN comm circuit
    Description CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle multiplex communication line with high data communication speed and excelle ...

    Other materials:

    Shift position indicator circuit
    Description  TCM sends position indicator signals to combination meter via CAN communication line.  The selector lever position is indicated on the shift position indicator. Component Function Check 1.CHECK SHIFT POSITION INDICATOR CAUTION: Always drive vehic ...

    Trouble diagnosis
    Condition of Error Detection DTC (e.g. U1000 and U1001) of CAN communication is indicated on SELF-DIAG RESULTS on CONSULT if a CAN communication signal is not transmitted or received between units for 2 seconds or more. CAN COMMUNICATION SYSTEM ERROR CAN communication line open (CAN-H, ...

    Rear seat
    Exploded View - Fixed Seatback  Headrest  Headrest holder (free)  Headrest holder (locked)  Bumper  Seatback assembly  Seatback trim  Seatback pad  Seat cushion trim  Seat cush ...

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