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Home / DTC / C1524 — Rear right wheel speed sensor circuit intermittent

C1524 — Rear right wheel speed sensor circuit intermittent

Detailed page for trouble code C1524.

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C1524

Generic C — Chassis

Rear right wheel speed sensor circuit intermittent

Brand: Generic
Type: C — Chassis
Views: UK: 0 EN: 0 RU: 0
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Page language: EN

Causes

  • Damaged or chafed wiring between the RR wheel sensor and ABS module
  • Corroded, loose or contaminated connector at the sensor or harness
  • Faulty wheel speed sensor (Hall or VR)
  • Damaged or missing tone ring/reluctor (cracked, missing teeth or heavy rust/debris)
  • Incorrect sensor air gap or sensor mispositioned
  • Intermittent internal ABS/traction control module connection or ground issue

Symptoms

  • ABS warning lamp illuminated intermittently or steady
  • Traction control/stability light and possible mode disablement
  • ABS or ESC may behave unpredictably (pulsing, unavailable)
  • Intermittent or incorrect wheel speed reading on scan tool live data
  • Occasional felt ABS intervention or braking irregularities under slip conditions

What to check

  • Scan ABS/traction control module for C1524 and any additional stored or pending codes; record freeze frame and live data while driving slowly
  • Visually inspect RR sensor, connector, and wiring for damage, pin corrosion, bent pins, or moisture intrusion
  • Wiggle harness and connector while monitoring live wheel speed data to reproduce intermittent behavior
  • Inspect tone ring/reluctor for missing/cracked teeth, heavy rust, debris, or metal shavings; check wheel bearing play that could affect gap
  • Measure sensor connector for proper 5V reference and ground (for active/Hall sensors) with ignition on (follow vehicle safety procedures)
  • Measure sensor resistance (if specified) and check continuity from sensor connector to ABS module pins for intermittent opens/shorts

Signal parameters

  • Passive (VR) sensor: DC resistance typically in the low hundreds to a few kiloohms (approx. 500–2,500 Ω); generates AC voltage while wheel spins (amplitude rises with speed) — expected AC amplitude may range from ~0.2 V AC at very low speed up to several volts at higher speed (specs vary)
  • Active (Hall/encoder) sensor: supply typically 5 V or 12 V reference and ground; signal is a square wave/TTL-style pulse that toggles between ~0.5 V and ~4.5 V (or near supply/ground) with frequency proportional to wheel speed
  • Expected behavior: signal frequency should increase smoothly with wheel rotation; intermittent dropouts, missing pulses, or noisy waveform indicate a problem
  • Note: exact voltages/resistance vary by vehicle — compare to manufacturer specifications

Diagnostic algorithm

  1. Retrieve all ABS/traction control codes and freeze frame data with a professional scan tool; note if the fault is current, intermittent, or history.
  2. With ignition on, monitor rear right (RR) wheel speed data on the scan tool. Perform low-speed drive or spin the wheel with the vehicle safely raised to observe live signal behavior.
  3. Visually inspect RR sensor, tone ring/reluctor, and wiring for damage, corrosion, contamination, missing teeth, or excessive air gap. Repair or clean as needed.
  4. Perform a connector wiggle test: wiggle harness and connector while watching live data to try to reproduce the intermittent signal. If wiggle causes the fault, repair wiring/connector or replace sensor as appropriate.
  5. Identify sensor type (passive VR or active Hall). For passive: measure DC resistance at the sensor pins (approx ranges vary) and check for AC output while spinning the wheel. For active: verify supply voltage and ground at the connector with ignition on, then check the signal output while spinning wheel (scope recommended).
  6. Check continuity from sensor connector to ABS module pins and inspect grounds for intermittent/poor connections.
  7. If wiring and connections are good but signal still intermittent, replace the RR wheel speed sensor. If tone ring is damaged or contaminated, repair or replace and ensure correct alignment and air gap.
  8. Clear codes and perform a road test to verify the fault does not return. Re-scan to confirm no new related codes.
  9. If the fault persists after sensor/reluctor/harness repair, inspect ABS module connectors and grounds or consider module testing/repair at a specialist.
  10. Safety note: use proper vehicle support and isolation when spinning wheels or working under the vehicle.

Likely causes

  • Wiring harness damage near the wheel (most common for intermittent failures)
  • Corroded/loose sensor connector allowing intermittent contact
  • Contaminated or damaged tone ring affecting signal
  • Failed wheel speed sensor

Fault status

⚠️ Status
Intermittent signal detected from the rear right wheel speed sensor circuit — ABS/ESC module logging intermittent/failed wheel speed input for RR wheel.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1-2 hours

Similar codes

C0035 C0040 C0045 C0050 C1512
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