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.
Circuit Description
As the toothed ring passes Wheel Speed Sensor (WSS), an AC voltage signal is produced. Signal frequency is proportional to the wheel speed. The magnitude of this signal is directly related to the wheel speed and the proximity of the WSS to the toothed ring (air gap).
DTC will set when brake is off and no WSS hardware DTCs are present and EBTCM sees a wheel speed variation of more than 9 MPH for 2.5 seconds. This test detects a situation in which one wheel acceleration or deceleration is beyond specified limits.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.