ECM Communication Circuit Malfunction

CIRCUIT DESCRIPTION
The circuit is used to send TRAC & VSC control information from the ABS & TRAC & VSC ECU to the ECM (TRC+, TRC-) and engine control information from the ECM to the ABS & TRAC & VSC ECU (ENG+, ENG-).




DETECTING CONDITIONS

Fail safe function:
If trouble occurs in the ECM communication circuit, the ECU prohibits TRAC & VSC control.




WIRING DIAGRAM

Step 1:

INSPECTION PROCEDURE