ECM Communication Circuit Malfunction - Electronically Controlled Brake System

BRAKE CONTROL: ELECTRONICALLY CONTROLLED BRAKE SYSTEM: C1203/95: ECM Communication Circuit Malfunction

DTC C1203/95 - ECM Communication Circuit Malfunction

DESCRIPTION

The circuit is used to send TRAC and VSC control information from the skid control ECU to the HV control ECU, and hybrid control information from the HV control ECU to the skid control ECU through the CAN communication system.






INSPECTION PROCEDURE

PROCEDURE

1. CHECK PART NUMBER (SKID CONTROL ECU AND HV CONTROL ECU)
(a) Check that the proper skid control ECU and HV control ECU are installed.
OK:
Proper ECUs are installed.
NG -- REPLACE ECUS WITH PROPER ONES
OK -- Continue to next step.
2. RECONFIRM DTC
(a) Clear the DTC .
(b) Turn the power switch on (IG).
(c) Check if the same DTC is recorded .
Result:






B -- REPLACE HV CONTROL ECU
A -- CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION)