Dtc C1203 Ecm Communication Circuit Malfunction


DESCRIPTION

INSPECTION PROCEDURE

CHECK PART NUMBER (ECM AND BRAKE ACTUATOR ASSEMBLY)

RECONFIRM DTC

DTC C1203 ECM Communication Circuit Malfunction


DESCRIPTION

This circuit is used to send control information from the skid control ECU (brake actuator assembly) to the ECM and engine control information from the ECM to the skid control ECU (brake actuator assembly) through the CAN communication system.

DTC Code
DTC Detection Condition
Trouble Area
C1203
The engine, drivetrain 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 are installed.

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



B
REPLACE ECUS WITH PROPER ONES
A


2.RECONFIRM DTC

  1. Clear the DTC (Toyota Fortuner RM000000XHV0C7X.html).

  1. Turn the ignition switch off.

  1. Check if the same DTC is output.

    HINT:
    Reinstall the sensors, connectors, etc. and restore the vehicle to its prior condition before rechecking for DTCs.
    Result
    Result
    		Proceed to
    DTC is output
    		A
    DTC is not output
    		for 1GR-FE
    		B
    for 1KD-FTV
    		C
    for 2KD-FTV
    		D


B
REPLACE ECM (Toyota Fortuner RM000000VW200DX.html)

C
REPLACE ECM (Toyota Fortuner RM0000013Z0004X.html)

D
REPLACE ECM (Toyota Fortuner RM0000043H100CX.html)
A

USE SIMULATION METHOD TO CHECK (Toyota Fortuner RM0000012Q9013X.html)