Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Travel Sensor: Operation
The BAS travel sensor (3) reports the position of the brake booster diaphragm plate to the Controller Antilock Brake (CAB). The BAS travel sensor rod is attached to the brake booster diaphragm plate (2). The diaphragm plate is located internal to the brake booster (1), and the sensor rod moves proportionally to the travel of the brake pedal. The travel sensor is used as an input to the CAB to determine the amount of driver braking effort.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.