Preliminary Inspection

Begin diagnosis with a basic visual inspection of brake fluid level, tire size and other mechanical brake system components which may affect anti-lock operation. Check system sensors, wire harnesses and connectors for proper installation, routing and connection. Ensure all system fuses are okay. Repair as necessary.

If cause of faulty operation cannot be located with basic diagnosis, ABS/VSC electronic control system must be checked. See DIAGNOSIS & TESTING .

When ignition is turned on, ABS, VSC, VSC OFF, BRAKE and SLIP warning lights should all come on, then go out after 3 seconds. If indicator lights do not operate as specified, go to SYMPTOM INDEX  under SYSTEM TESTS.