Wheel Speed Sensor: Description and Operation

CIRCUIT OPERATION
The all wheel anti-lock system uses four wheel speed sensors; one for each wheel. Each sensor converts wheel speed into an electrical signal that it transmits to the Controller, Anti-Lock Brakes (CAB). A pair of twisted wires connect to each sensor to provide signals to the CAB.

Circuits B6 and B7 provide signals to the CAB from the right front wheel speed sensor. Circuit B6 which provides the LOW signal connects to cavity 2 of the CAB. Circuit B7 connects to cavity 1 of the CAB and provides the HIGH signal.

Circuits B8 and B9 provide signals to the CAB from the left front wheel speed sensor. Circuit B8, which provides the HIGH signal, connects to cavity 10 of the CAB. Circuit B9 connects to cavity 9 of the CAB and provides the LOW signal.

Circuits B1 and B2 provide signals to the CAB from right rear wheel speed sensor. Circuit B1 which provides the LOW signal connects to cavity All of the CAB. Circuit B2 connects to cavity A12 and provides the HIGH signal.

Circuits B4 and B3 provide signals to the CAB from the left rear wheel speed sensor. Circuit B3, which provides the LOW signal, connects to cavity A9 of the CAB. Circuit B4 connects to cavity A10 and provides the HIGH signal.