Dtc U0100 Lost Communication With Ecm / Pcm A

Drivetrain. Land Cruiser. Urj200, 202 Grj200 Vdj200
Ab60F Automatic Transmission Transaxle. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

INSPECTION PROCEDURE

CHECK DTC OUTPUT (IN ADDITION TO DTC P0100)

REPLACE ECM

CHECK IF DTC RECURS

DTC U0100 Lost Communication with ECM / PCM "A"


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

INSPECTION PROCEDURE

1.CHECK DTC OUTPUT (IN ADDITION TO DTC P0100)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the intelligent tester on.

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

  1. Read the DTCs using the tester.

    Result
    Result
    		Proceed to
    Only U0100 is output
    		A
    U0100 and other DTCs are output
    		B

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


B
GO TO DTC CHART (Click here)
A


2.REPLACE ECM

  1. Replace the ECM (Click here).


NEXT


3.CHECK IF DTC RECURS

  1. Clear the DTC (Click here).

  1. Start the engine.

  1. Read the DTCs using the tester.

    Result
    Result
    		Proceed to
    No DTC output
    		A
    Other DTCs output
    		B



B
GO TO DTC CHART (Click here)
A

END