C0275

Code

Generic C — Chassis

Right Rear Wheel Speed Sensor Circuit

Brand: Generic

Type: C — Chassis

Views: UK: 13 EN: 14 RU: 14

AI status

Completed

ready

Completed 100%

Page language: EN

Read stored codes and freeze frame with a capable scan tool; clear and re-check
Observe live wheel speed sensor data for right rear while spinning wheel (scantool or oscilloscope)
Visual inspection of sensor, connector, harness routing, insulation and tone ring
Check DC resistance of the sensor (if passive) and compare to spec; check for open/short
Backprobe connector with ignition on to check power and ground for active sensors (refer to wiring diagram)
Inspect tone ring for missing/damaged teeth, heavy rust, or contact with hub

Passive (variable reluctance) sensors: coil resistance typically ~100–1500 ohms (vehicle-specific); produces AC voltage that increases with wheel speed
Active (Hall/VR) sensors: supply typically 5 V (or switched 12 V); output is a square/pulse signal 0–5 V (or 0–12 V depending on design) with frequency proportional to wheel speed
Expected no-signal at zero wheel speed; frequency and amplitude increase smoothly with wheel rotation
Typical signal frequency range: 0–several hundred Hz depending on wheel speed and tooth count
If present, CAN/ABS module expects continuous pulsed/sinusoidal signal; sudden drop to 0 V, constant voltage or noise indicates fault

Retrieve and record all ABS/traction codes and live data; note freeze frame conditions.
Perform visual inspection: check sensor mounting, connector condition, harness chafing, and tone ring integrity.
With wheel elevated and secured, spin the wheel by hand and observe right rear wheel speed reading on a scan tool or oscilloscope.
If no or erratic signal: disconnect sensor and measure DC resistance (for passive types) and compare to spec; for active types, verify reference supply and ground at connector with ignition ON.
Backprobe the sensor connector while spinning the wheel to observe waveform (use oscilloscope) or voltage pulses with a multimeter if capable.
Perform continuity test from the sensor connector to the ABS module connector; check for short to ground or battery voltage and repair any harness faults found.
Inspect and repair/replace damaged tone ring or remove debris; check air gap between sensor and tone ring and set to specification.
If wiring and tone ring are good and sensor tests out of spec, replace the right rear wheel speed sensor and retest.
If new sensor still fails or wiring is confirmed good, suspect ABS module input driver fault — consult manufacturer procedures for module testing/repair or replacement.
After repair, clear codes and perform a road test to confirm proper wheel speed signal and that warning lamps remain off.