C1203

DTC C1203 ECM COMMUNICATION CIRCUIT MALFUNCTION

CIRCUIT DESCRIPTION

DTC Detecting Condition:

1MZ, 3MZ
The circuit is used to send TRAC & VSC control information from the skid control ECU to the ECM (TRC+, TRC-), and engine control information from the ECM to the skid control ECU (ENG+, ENG-).

2AZ
The ECM signal circuit is used for the CAN communication system.

Wiring Diagram:

Step 1 - 2:

Step 3 - 5:

Step 6:

INSPECTION PROCEDURE

NOTE: When replacing the brake actuator assembly, perform zero point calibration