Defect
On certain vehicles, a rear wheel speed sensor may not have been installed correctly, which causes the sensor to report an incorrect wheel speed to the anti-lock brake system (ABS) control unit. The on-board diagnostic system quickly identifies this error under most normal driving conditions and activates numerous warning lamps and disables the ABS. Brake application below the ABS threshold, or after ABS is disabled, is not affected. However, if brake application exceeding the ABS threshold occurs before the malfunction is detected, the ABS control unit may reduce brake force to all wheels. An unexpected loss of brake force can cause a crash.
Safety Risk
No risk description available.
Remedy
Dealers will inspect the rear wheel speed sensors. If an incorrect gap is detected, the sensor will be removed and the knuckle checked for cross-threading damage and replaced, if necessary.