Visual Inspection

MECHANICAL	ELECTRICAL
Brake fluid level Vacuum system Wheel speed sensor installation Wheel speed sensor air gap Magnetic pulse wheel(s) (damaged/contaminated) Steering angle sensor Yaw rate lateral acceleration sensor Incorrect wheel or tire size	Warning light operation Fuses Wheel speed sensors Connectors/Pins Harnesses Steering wheel rotation sensor Yaw rate lateral acceleration sensor Booster pressure sensor Hydraulic control unit

If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step
If the cause is not visually evident check for Diagnostic Trouble Codes (DTCs) and refer to the DTC Index