Dtc C1203 Ecm Communication Circuit Malfunction

Brake. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
Brake Control. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35

DESCRIPTION

INSPECTION PROCEDURE

CHECK PART NUMBER (SKID CONTROL ECU AND ECM)

DTC C1203 ECM Communication Circuit Malfunction


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 (SKID CONTROL ECU AND ECM)

  1. Check that the proper skid control ECU and ECM are installed.

    Result:
    Result
    		Proceed to
    Proper ECUs are installed.
    		for 1AZ-FE
    		A
    for 2AZ-FE
    		B
    for 2GR-FE
    		C
    for 3ZR-FAE
    		D
    Proper ECUs are not installed.
    		E


B
REPLACE ECM (RAV4_ACA30 RM0000017UO01HX.html)

C
REPLACE ECM (RAV4_ACA30 RM0000017UO01GX.html)

D
REPLACE ECM (RAV4_ACA30 RM0000017UO01KX.html)

E
REPLACE ECUS WITH PROPER ONES
A

REPLACE ECM (RAV4_ACA30 RM0000017UO01FX.html)