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:

    Brake booster
    Inspection OPERATION With engine stopped, change vacuum to atmospheric pressure by depressing brake pedal several times. Then with brake pedal fully depressed, start engine and when vacuum pressure reaches the standard, make sure that clearance between brake pedal and floor panel decreas ...

    P1777 step motor
    Description The step motor changes the step by turning 4 coils ON/OFF according to the signal from TCM. As a result, the flow of line pressure to primary pulley is changed and pulley ratio is controlled. DTC Logic DTC DETECTION LOGIC DTC CONFIRMATION PROCEDURE CAUTION: Always drive ve ...

    Switch operation
    Type A (if so equipped) The windshield wiper and washer operates when the ignition switch is placed in the ON position. Push the lever down to operate the wiper at the following speed: Intermittent (INT) or (AUTO) - intermittent operation can be adjusted by turning the knob A . L ...

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