A L L Diagnostic Trouble Codes ( DTC ): C Code Charts
C1231
ABS W/BA & VSC System
CIRCUIT DESCRIPTION
DETECTING CONDITIONS
Fail safe function:
If any trouble occurs in the steering angle sensor circuit, the ECU prohibits BA & TRAC & VSC controls.
2000 Lexus ES 300 V6-3.0L (1MZ-FE) Copyright ? 2013, ALLDATA 10.52SS Page 2
WIRING DIAGRAM
2000 Lexus ES 300 V6-3.0L (1MZ-FE) Copyright ? 2013, ALLDATA 10.52SS Page 3
INSPECTION PROCEDURE
HINT: Start the inspection from step 1 in case of using the LEXUS hand-held tester and start from step 3 in case of not using the LEXUS hand-held
tester.
ABS W/Traction Control (TRAC)
2000 Lexus ES 300 V6-3.0L (1MZ-FE) Copyright ? 2013, ALLDATA 10.52SS Page 4
CIRCUIT DESCRIPTION
The speed sensor detects wheel speed and sends the appropriate signals to the ECU. These signals are used to control the ABS and TRAC system.
The front and rear rotors each have 48 serrations.
When the rotors rotate, the magnetic field emitted by the permanent magnet in the speed sensor generates an AC voltage. Since the frequency of this
AC voltage changes in direct proportion to the speed of the rotor, the frequency is used by the ECU to detect the speed of each wheel.
DETECTING CONDITIONS
HI-NTD: TC No. C1231/31 is for the right front speed sensor.
Fail safe function:
If any trouble occurs in the speed sensor circuit, the ECU cuts off current to the ABS & TRAC solenoid relay
and prohibits ABS control and TRAC control.
2000 Lexus ES 300 V6-3.0L (1MZ-FE) Copyright ? 2013, ALLDATA 10.52SS Page 5
WIRING DIAGRAM
2000 Lexus ES 300 V6-3.0L (1MZ-FE) Copyright ? 2013, ALLDATA 10.52SS Page 6
2000 Lexus ES 300 V6-3.0L (1MZ-FE) Copyright ? 2013, ALLDATA 10.52SS Page 7
2000 Lexus ES 300 V6-3.0L (1MZ-FE) Copyright ? 2013, ALLDATA 10.52SS Page 8
INSPECTION PROCEDURE
