ABS (Antilock Brake System)

DTC C0273 ABS Motor Relay Circuit

CIRCUIT DESCRIPTION
The ABS motor relay supplies power to the ABS pump motor. While the ABS & TRAC & VSC are activated, the ECU switches the motor relay ON and operates the ABS pump motor.





DETECTING CONDITIONS

Fail safe function:
If trouble occurs in the ABS motor relay circuit, the ECU cuts off current to the ABS solenoid relay and prohibits ABS & TRAC & VSC controls and the brake system becomes normal.





WIRING DIAGRAM

Step 1:

Step 2:

Step 3:

Step 4:

Step 5:

INSPECTION PROCEDURE

HINT: Start the inspection from step 1 in case of using the LEXUS hand-held tester and start from step 2 in case of not using LEXUS hand-held tester.