In most cases, their diagrams are right from the factory manuals. They include wiring diagrams and technical service bulletins. Get the BEST auto repair information and are professional-grade shop manuals-period. Wipe it off with a dry nylon bristle brush. Look for debris build up on the magnetized ring. Inspect the wheel bearing associated with the trouble code. But there’s enough metallic debris on the road that any accumulation on the magnetized rubber ring can throw off the wheel speed sensor. GM figured that the elimination of the steel tone ring would stop the accumulation of metallic debris. Great idea but bad execution on GM’s part. The wheel speed sensor is inside the wheel bearing and the tone ring is mounted on the outside of the like a seal in a sealed bearing. Now, instead of a steel tone ring, it is a rubberized ring with magnetic North and South poles molded into the nitrile rubber (like a magnetic business card). GM changed the wheel speed sensor and tone rings in these vehicles. As rust accumulated on the tone ring it would throw debris onto the magnetic sensor and that debris would interfere with the signal, causing the ABS to activate prematurely. Older ABS braking systems used a steel toothed ring and a magnetized wheel speed sensor. You do NOT have to replace the wheel bearing to correct this problem. The cause of these trouble codes and braking noise is debris accumulation on the magnetic “tone” wheel built into the wheel bearing. Vehicles affected by this service bulletinĢ013 Cadillac XTS – FWD Models (rear non-driven wheel bearings only) This condition is normal when the vehicle loses signal from a wheel speed sensor. You will most likely experience heavier steering feel at low speed or static steering maneuvers when this happens.
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Or, if your vehicles is equipped with Electric Power Steering you may also notice a Service Steering Message displaying in the Driver Information Center (DIC). In addition to the warning lights, you may also hear a brief and intermittent noise, click, ratchet, grind, or ABS pump motor noises from the inside of the vehicle at parking lot speeds when braking. C0045 Left Rear Wheel Speed Sensor CircuitĬ0050 Right Rear Wheel Speed Sensor Circuit Plausibility Failure