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/System Description
The electronic brake control module (EBCM) supplies a 5 V reference and provides a low reference to the steering wheel angle sensor. The EBCM monitors the signal circuit and the three phase circuits to determine the steering wheel position. The EBCM receives three signal inputs from the steering wheel speed/position sensor. The Index Pulse signal is only High when the steering wheel is centered or within a few degrees of the straight ahead position. The 2 input signals Phase A and Phase B are approximately 90 degrees out of phase. The EBCM dynamically interprets the relationship between the Phase A and Phase B inputs, and determines the position of the steering wheel and the direction of the steering wheel rotation.
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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.