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.
Signal Circuit Inspection
- Lift vehicle with suitable lift and refer to shop handbook to remove wheel and wheel guard.
- Ignition "ON".
- Rotate the disc slowly by hands.
- Back probe and measure signal waveform between signal terminal of Rear LH wheel speed sensor and chassis ground with GDS.
- Is the measured waveform within specifications?
Specification : High Approx. 1.18 ~1.68V / Low Approx. 0.59 ~ 0.84V
Fig.1) Normal wheel speed sensor signal waveform when rotating wheel.
YES
Go to COMPONENT INSPECTION procedure.
NO
Repair open or short in signal circuit between HECU and Rear LH wheel speed sensor harness connector and then go to VERIFICATION OF VEHICLE REPAIR procedure.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.