C0317

Code

Generic C — Chassis

Right Front Wheel Speed Sensor Circuit Malfunction

Brand: Generic

Type: C — Chassis

Views: UK: 7 EN: 13 RU: 12

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ABS warning lamp illuminated (may also trigger traction control/ESC lamp)
ABS or traction control functions disabled or operate in a degraded mode
Possible inconsistent wheel speed reading for the right front on a scan tool
ABS activation irregularities under braking, possible pulsation or reduced function
Occasional speedometer or stability control anomalies (depends on vehicle integration)

Use a scan tool to read live wheel speed data and confirm right front sensor output vs other wheels
Visually inspect sensor, connector and wiring harness for damage, corrosion, contamination or rubbing points
Wiggle the harness and connector while monitoring live data to check for intermittent faults
Measure continuity and resistance of the sensor circuit and compare to manufacturer spec
Check for AC voltage or pulse output at the sensor while rotating the wheel (jack and safely support the vehicle)
Inspect tone ring / reluctor for missing teeth, heavy rust, or foreign debris

Passive (variable reluctance) sensor: AC voltage waveform (sine/alternating) increasing with wheel speed; typically tens of millivolts at low speed to several hundred millivolts up to ~1V+ depending on design
Active (Hall or magnetoresistive) sensor: digital square wave or pulse signal referenced to 5V (some systems use 12V or pull-up to module); frequency rises with wheel speed, duty cycle often near 50%
Expected behaviour: signal present and proportional to wheel speed; no constant open-circuit or short to supply/ground
When stationary: sensor output typically zero or stable idle level; when rotating slowly: measurable pulses/AC should be seen

Retrieve freeze frame and live data with a scan tool. Confirm C0317 and note conditions when it set (speed, temp, after impact, etc.).
Visually inspect the right front sensor, connector and wiring for damage, corrosion, pin push-out, or contamination. Repair any obvious issues.
With vehicle safely supported and wheel off the ground, spin the wheel by hand. Monitor the wheel speed sensor signal with a scan tool or oscilloscope. Look for missing or erratic pulses.
Backprobe the sensor connector. For passive sensors measure AC voltage while spinning; for active sensors check for proper supply/reference voltage and pulse output. Compare to manufacturer specs.
Measure sensor resistance and circuit continuity to the ABS module connector. Check for short to ground or supply. Repair or replace wiring as required.
Inspect the tone/reluctor ring for damaged or missing teeth, heavy rust, or debris. Clean or replace if damaged. Check hub/bearing play that could affect sensor gap.
If sensor output and wiring are good, verify ABS module power and grounds. Check for corrosion at module connector and test module inputs if qualified equipment is available.
After repairs, clear codes and perform a road test or forced wheel spin test while monitoring live data to confirm the fault does not return.