Wheel Speed Sensor Signal Missing

The wheel speed sensor should detect how fast each wheel is turning. If it doesn't send a signal, the computer can't tell if the wheels are spinning. This can affect traction control and anti-lock brakes.

The vehicle's control module expects a waveform signal from the wheel speed sensor at a consistent frequency based on wheel rotation. When this signal is absent or below a threshold level, the fault code triggers.

Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.

1. 11. Inspect wiring and connector to the wheel speed sensor. Look for frays, breaks, or corrosion. Action: Repair or replace damaged wiring/connectors. Decision: Still getting a C006C? Go to step 2.
2. 22. Measure the voltage at the wheel speed sensor connector with the ignition on but engine off. Expected: 0.5V to 5V. Action: If no voltage, check the circuit continuity. Decision: If continuity is good, go to step 3. If continuity is bad, repair the circuit.
3. 33. Test the wheel speed sensor by checking for the output signal while rotating the wheel. Expected: Signal between 0.5V and 5V. Action: If no signal is present, the sensor is likely faulty. Decision: Replace the wheel speed sensor and retest. If signal is present, go to step 4.
4. 44. Use a scan tool to check for any software updates or additional fault codes that could be affecting the system. Action: Update software if necessary. Decision: If no updates exist and the issue persists, further diagnose the ABS control module.

• Damaged wiring to the wheel speed sensor
• Corroded or loose connector at the wheel speed sensor
• Faulty wheel speed sensor
• Contaminants affecting sensor operation
• Software issue in the control module

$$