Visual Inspection

MECHANICAL	ELECTRICAL
Brake fluid level Vacuum system Wheel speed sensor installation Wheel speed sensor air gap Steering wheel rotation sensor Accelerometer/sensor cluster installation Incorrect wheel or tire size	Warning light operation Fuses Wheel speed sensors Connectors/Pins Harnesses Steering wheel rotation sensor Accelerometer/sensor cluster Hydraulic Control Unit (HCU)

3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step
4. If the cause is not visually evident, check the anti-lock braking system and steering rotation sensor modules for Diagnostic Trouble Codes (DTCs) and refer to the relevant DTC Index.