Circuit Operation

CIRCUIT OPERATION
The all wheel Anti-Lock Brake System (ABS) uses three wheel speed sensors; a single sensor for both rear wheels and individual sensors for the front wheels. The single sensor used for the rear wheels mounts on the top of the rear axle differential housing. Each sensor converts wheel speed into an electrical signal that is transmitted to the ABS control module. A pair of twisted wires connect to each sensor and provide signals to the ABS control module.

Circuits B6 and B7 provide signals to ABS control module from the right front wheel speed sensor. Circuit B6 which provides the LOW signal connects to cavity 15 of the ABS control module. Circuit B7 connects to cavity 2 of the module and provides the HIGH signal.

Circuits B8 and B9 provide signals to ABS control module from the left front wheel speed sensor. Circuit B8, which provides the LOW signal, connects to cavity 16 of the ABS control module. Circuit B9 connects to cavity 3 of the module and provides the HIGH signal.

Circuit B114 connects to cavity 14 of the ABS control module and to circuit B2 of the rear wheel speed sensor at the sensor connector. Circuit B113 connects to cavity 1 of the ABS control module and to circuit B1 at the rear wheel speed sensor connector. Circuit B114 provide the rear wheel speed sensor LOW input while circuit B113 provides the HIGH input.