ABS (Antilock Brake System)

CIRCUIT DESCRIPTION




DETECTING CONDITIONS

HINT: There is a case that LEXUS hand-held tester cannot be used when ECU is abnormal.

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




WIRING DIAGRAM

Step 1:

Step 2:

Step 3:

Step 4:

Step 5:

Step 6:

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 the LEXUS hand-held tester.