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:

    Power supply and ground circuit
    AV CONTROL UNIT AV CONTROL UNIT : Diagnosis Procedure 1.CHECK FUSES Check that the following fuses of the AV control unit are not blown. 2.POWER SUPPLY CIRCUIT CHECK Disconnect AV control unit connectors M115 and M119. Check voltage between the AV control unit connectors M115 and ...

    Evaporative emission system
    System Diagram System Description *1: ECM determines the start signal status by the signals of engine speed and battery voltage. *2: This signal is sent to the ECM via the CAN communication line. SYSTEM DESCRIPTION The evaporative emission system is used to reduce hydrocarbons emitte ...

    On board diagnostic (OBD) system
    Trouble Diagnosis Introduction CAUTION: Do not use electrical test equipment on any circuit related to the SRS unless instructed to do so inthis Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harness connectors. Do not attempt to repair, splice or modify ...

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