Acceleration/Deceleration Sensor: Description and Operation
SWITCH OPERATIONThe Controller monitors the acceleration switch at all times. The switch assembly contains three mercury switches that monitor vehicle deceleration rates (G force). Sudden, rapid changes in vehicle and wheel deceleration rate trigger the switch, sending a signal to the CAB. The switch assembly provides three deceleration rates; two for forward braking and one for rearward braking.
CIRCUIT OPERATION
During four-wheel drive operation, the acceleration switch provides deceleration data to the ABS control module.
Circuits B41, B42, and B43 connect the acceleration sensor to the ABS control module. Circuits B41 and B42 provide switch states while circuit B43 provides ground. At the ABS control module, circuit B41 connects to cavity 25, circuit B42 connects to cavity 43 and circuit B43 connects to cavity 26.