RAM 2500 Truck 2WD L6-359 5.9L DSL Turbo VIN D FI (1997)
Wheel Speed Sensor: Description and Operation
Circuit Operation
Four Wheel Antilock Brakes
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 it transmits to the Controller Anti Lock Brake (CAB). A pair of twisted wires connect to each sensor and provide
signals to the CAB.
Circuits B6 and B7 provide signals to CAB from right front wheel speed sensor. Circuit B6 which provides the LOW signal, connects to cavity 15
of the CAB. Circuit B7 connects to cavity 2 of the CAB and provides the HIGH signal.
Circuits B8 and B9 provide signals to CAB from left front wheel speed sensor. Circuit B8 which provides the LOW signal, connects to cavity 16
of the CAB. Circuit B9 connects to cavity 3 of the CAB and provides the HIGH signal.
Circuit B114 connects to cavity 14 of the CAB and to the rear wheel speed sensor. Circuit B113 connects to cavity 1 of the CAB and to the rear
wheel speed sensor. Circuit B114 provides the rear wheel speed sensor LOW input while circuit B113 provides the HIGH input.
Rear Wheel Antilock Brakes
CIRCUIT OPERATION
The rear wheel speed sensor is mounted on the top of the rear axle differential. The sensor converts wheel speed into an electrical signal that it
transmits to the Controller Anti Lock Brake (CAB).
Circuits B113 and B114, a pair of twisted wires, connect to the sensor to provide signals to the CAB. The B113 circuit also connects to the
universal data link connector.
Circuit B113 connects to cavity 14 of the CAB. Circuit B114 connects to cavity 13 of the CAB.
