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AUTOMATIC TRANSMISSION SYSTEM (for 1VD-FTV), Diagnostic DTC:U0100

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DTC Code DTC Name
U0100 Lost Communication with ECM / PCM "A"
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DESCRIPTION

The engine control unit and the transmission control unit are located inside the ECM. The engine control unit intercommunicates with the transmission control unit with the Controller Area Network (CAN). If there is a problem in this intercommunication, the ECM stores a DTC.

DTC Code DTC Detection Condition Trouble Area
U0100 No communication with the ECM continues (1 trip detection logic). ECM
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INSPECTION PROCEDURE

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PROCEDURE


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    CHECK DTC OUTPUT (IN ADDITION TO DTC P0100)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the intelligent tester on.

    4. Enter the following menus: Powertrain / ECT / DTC.

    5. Read the DTCs using the tester.

      Table 1. Result
      Result Proceed to
      Only U0100 is output A
      U0100 and other DTCs are output B
      Tip:

      If any other codes besides U0100 are output, perform troubleshooting for those DTCs first.


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    REPLACE ECM


    1. Replace the ECM (Click here).


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    CHECK IF DTC RECURS


    1. Clear the DTC (Click here).

    2. Start the engine.

    3. Read the DTCs using the tester.

      Table 2. Result
      Result Proceed to
      No DTC output A
      Other DTCs output B

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    END

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    GO TO DTC CHARTClick here

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    GO TO DTC CHARTClick here