1, 2 and 3 Digit Codes: 10

Fault Codes 9 and 10 Diagnosis Chart:

Wheel Speed Sensor Circuits:

SENSOR OPERATION
Each wheel speed sensor creates a small AC voltage as a toothed sensor ring (tone-wheel) is passed by the stationary sensor. The sensor ring is mounted on the drive axle or hub/bearing assembly. The sensor has a permanent magnet and coil and generates voltage by magnetic induction. Wheel speed determines the frequency of the wheel speed sensor signal. The Anti-lock Brake Control Module (ABM) uses the wheel speed sensor signal to calculate vehicle reference speeds and individual speed, acceleration, and slip values for each wheel. These values are used to determine when anti-lock control is required.

SENSOR CABLES
Proper installation of wheel speed sensor cables is critical to continued system operation. Be sure that cables are installed and routed properly. Failure to install cables in retainers, see COMPONENT REPAIR AND REPLACEMENT PROCEDURES, may result in contact with moving parts or overextension of cables, resulting in an open circuit.

FAILURE CONDITIONS
Under conditions of hard acceleration, the Anti-lock Brake Control Module (ABM) cannot distinguish between specific wheel speed sensors in the event of a failure. It can, however, determine which diagonal circuit the failure occurred in. Code 9 will set if a failure is detected on the left front/right rear diagonal and Code 10 will set if a malfunction is noted on the right front/left rear diagonal. Codes 9 or 10 may also set with the compact spare installed.

If a Code 9 or 10 is set and a wheel speed sensor malfunction is present, the ABCM is able to determine which sensor has failed if the car is accelerated slowly. Code 9 or 10 will be replaced by the appropriate wheel speed sensor low output code (5-8).