DTC    U0100/56    Lost Communication with ECM / PCM "A"

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DESCRIPTION

The steering control ECU receives signals from the ECM (engine ECU) via CAN communication.
If the steering control ECU detects an error in reception, it will output this DTC.

DTC No.
DTC Detecting Condition
Trouble Area
U0100/56
The steering control ECU detects an error in reception (from ECM) in CAN communication.
  1. CAN communication system
  2. ECM

WIRING DIAGRAM


C111971E01


INSPECTION PROCEDURE

1.CHECK DTC

  1. Check for DTCs in the CAN communication system (Click here).

    Result:

    Result
    		Proceed to
    DTC is not output.
    		A
    DTC is output.
    		B



B
REPAIR CIRCUIT INDICATED BY DTC OUTPUT
A

REPLACE ECM