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.
DTC C0035: Left Front Wheel Speed Sensor Malfunction - No Signal/Invalid Signal
2000 Saturn LW1 AutomaticSECTION DTC C0035: Left Front Wheel Speed Sensor Malfunction - No Signal/Invalid Signal
- Drive vehicle at about 30 MPH. Using scan tool, monitor left front wheel speed parameter. If scan tool indicates a signal reading, problem is intermittent. If scan tool does not indicate a signal reading, go to next step.
- Turn ignition off. Disconnect EBTCM harness connector. Using a DVOM, check resistance between EBTCM harness connector terminals No. 6 (Yellow wire) and No. 7 (Light Blue wire). If resistance is 800-1700 ohms, go to next step. If resistance is less than 800 ohms, go to step 6. If resistance is greater than 1700 ohms, go to step 7.
- Disconnect wheel speed sensor harness connector. Check continuity between chassis ground and sensor terminal "A", then sensor terminal "B". If continuity exists on either terminal, repair short to ground in circuit. If continuity does not exist on either terminal, go to next step.
- Connect a test light between chassis ground and sensor terminal "A", then sensor terminal "B". If test light illuminates on either circuit, check for short to voltage in circuit. Repair as necessary. If test light does not illuminate on either circuit, go to next step.
- Check wheel speed sensor for physical damage, improper gap or damage. Repair or replace as necessary. If no problem is found, check for terminal tightness. Repair as necessary. If terminals are okay, replace EBTCM.
- Disconnect wheel speed sensor harness connector. Check continuity between wheel speed sensor harness connector terminals "A" and "B". If continuity exists, repair short in circuit. If continuity does not exist, replace wheel speed sensor.
- Disconnect wheel speed sensor harness connector. Check for open in wheel speed sensor harness connector circuit to EBTCM. If continuity does not exist on both circuit, check for open in circuits. If continuity exists on both circuits, check for terminal tightness at connector. Repair as necessary. If terminals are okay, replace wheel speed sensor.
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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.