2000 Lexus ES 300 V6-3.0L (1MZ-FE) Copyright ? 2013, ALLDATA 10.52SS Page 1
A L L Diagnostic Trouble Codes ( DTC ): C Code Charts
C1203
CIRCUIT DESCRIPTION
The circuit is used to send TRAC & VSC control information from the ABS & BA & TRAC & VSC ECU to the ECM (TRC+, TRC-), and engine
control information from the ECM to the ABS & BA & TRAC & VSC ECU (ENG+, ENG-).
DETECTING CONDITIONS
Fail safe function:
If any trouble occurs in the ECM communication circuit, the ECU prohibits BA & TRAC & VSC controls.
WIRING DIAGRAM
2000 Lexus ES 300 V6-3.0L (1MZ-FE) Copyright ? 2013, ALLDATA 10.52SS Page 2
INSPECTION PROCEDURE
A L L Diagnostic Trouble Codes ( DTC ): C Code Charts
C1203
CIRCUIT DESCRIPTION
The circuit is used to send TRAC & VSC control information from the ABS & BA & TRAC & VSC ECU to the ECM (TRC+, TRC-), and engine
control information from the ECM to the ABS & BA & TRAC & VSC ECU (ENG+, ENG-).
DETECTING CONDITIONS
Fail safe function:
If any trouble occurs in the ECM communication circuit, the ECU prohibits BA & TRAC & VSC controls.
WIRING DIAGRAM
2000 Lexus ES 300 V6-3.0L (1MZ-FE) Copyright ? 2013, ALLDATA 10.52SS Page 2
INSPECTION PROCEDURE
