C1203

BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: C1203/53: ECM Communication Circuit Malfunction

DTC C1203/53 - ECM Communication Circuit Malfunction

DESCRIPTION

A new skid control ECU is supplied without engine variation data. Until it is recognized by the ECU, DTC C1203/53 remains stored. By entering test mode, recognition of engine variation data is automatically conducted, and DTC C1203/53 is erased automatically.





INSPECTION PROCEDURE

NOTE: When replacing the VSC actuator assembly, perform zero point calibration (Programming and Relearning).

PROCEDURE

1. PERFORM TEST MODE INSPECTION
(a) Perform a TEST MODE inspection (Test Mode Procedure).
NEXT -- Continue to next step.
2. RECONFIRM DTC
(a) Clear the DTC (Reading and Clearing Diagnostic Trouble Codes).
(b) Start the engine.
(c) Check if the same DTC is output (Reading and Clearing Diagnostic Trouble Codes).

Result





B -- USE SIMULATION METHOD TO CHECK
A -- REPLACE VSC ACTUATOR ASSEMBLY