C1716

Code

Other C — Chassis

Right Front Sensor Circuit Fault

Brand: Other

Type: C — Chassis

Views: UK: 20 EN: 51 RU: 23

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Page language: EN

ABS and/or traction/stability warning lamp illuminated
ABS may be disabled; traction/stability may be limited or disabled
Unexpected ABS activation or reduced braking performance under heavy braking
Speedometer or cruise control irregularities if vehicle uses wheel speed for those systems
Intermittent drivability or diagnostic codes that clear and return

Read freeze frame and live data with a scan tool; observe right-front wheel speed value at key-on and while driving
Visual inspection of right-front sensor, connector, harness, and tone ring for damage, debris, or missing teeth
Wiggle test harness and connector while monitoring live data to reveal intermittent faults
Measure sensor resistance and compare to specification (manufacturer data) or check for open/short
Check for reference voltage and ground (active sensors) with key on
Use an oscilloscope to verify proper waveform (VR: AC sine; Hall/active: square/pulse) while rotating the wheel

Passive (VR) sensors: AC voltage increases with speed; expect measurable mV to volts at moderate wheel speed; sensor DC resistance typically in the manufacturer's specified range (commonly a few hundred to a few thousand ohms)
Active (Hall/electronic) sensors: supply/reference voltage typically 5 V (or 12 V on some designs) with a pulsed square-wave output 0–5 V (or 0–12 V) as wheel rotates
At rest: active sensor idle voltage ~0–5 V; VR sensor shows 0 V with key off and small AC when wheel turned
Open-circuit: infinite resistance; short-to-ground or short-to-V: near 0 Ω or near system voltage respectively
Signal frequency and amplitude should increase smoothly with wheel speed without dropouts or noise spikes

Connect a scan tool, record freeze-frame and live data. Confirm only the right-front wheel speed is missing/erratic.
Visually inspect the right-front sensor, tone ring, and wiring for obvious damage, corrosion, or contamination. Clean and reseat connectors.
With ignition ON (engine off), backprobe sensor connector: for active sensors verify reference voltage and ground; for passive sensors measure DC resistance across sensor terminals and compare to spec.
Rotate wheel by hand or road test with scan tool while monitoring the right-front wheel speed channel; wiggle harness/connector to check for intermittent changes.
Use an oscilloscope to view waveform at sensor while spinning wheel: passive should show sinusoidal AC, active should show clean pulses. Note amplitude/shape and any dropouts.
If open/short suspected, isolate circuit and check continuity between sensor connector and ABS module pins. Repair any damaged wiring or connector terminals.
If wiring and connector are good but signal is absent or out of spec, replace the right-front wheel speed sensor and test again.
If replacement sensor still fails or if multiple sensors/wires test OK, suspect ABS control module fault; verify module power/grounds and consider module diagnostics or replacement per manufacturer procedures.
After repair, clear codes and perform a test drive to confirm the code does not return and that ABS/traction systems operate normally.

⚠️ Status

Right front wheel speed sensor circuit fault detected — open/short/intermittent signal. Check sensor, connector, wiring, and ABS module inputs.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.0 hours

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C1716 — Right Front Sensor Circuit Fault