C1253

DTC C1253 Motor Relay Circuit

CIRCUIT DESCRIPTION
The ABS motor relay supplies power to the hydraulic brake booster pump motor. While the ABS is activated the ECU switches the motor relay ON and operates the hydraulic brake booster pump motor.





DETECTING CONDITION

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 control.





WIRING DIAGRAM

Step 1:

Step 2:

Step 3:

Step 4:

Step 5:

Step 6:

INSPECTION PROCEDURE
Start the inspection from step 1 in case of using the LEXUS hand-held tester and start from step 3 in cas of not using LEXUS hand-held tester.