DTC    C1203    ECM Communication Circuit Malfunction

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DESCRIPTION

The circuit is used to send TRC and VSC control information from the skid control ECU to the ECM, and engine control information from the ECM to the skid control ECU through the CAN communication system.

DTC Code
DTC Detection Condition
Trouble Area
C1203
Engine, drive source and destination variations that are sent from the ECM do not match the ones of the skid control ECU.
ECM

INSPECTION PROCEDURE

1.CHECK PART NUMBER (ECM AND BRAKE ACTUATOR ASSEMBLY)

  1. Check that the proper ECM and brake actuator assembly (skid control ECU) are installed.

    Result:

    Result
    		Proceed to
    Proper ECUs are installed
    		A
    Proper ECUs are not installed
    		B



B
REPLACE ECUS WITH PROPER ONES
A

REPLACE ECM