Cruise Control Circuit Description

Ignition positive voltage is supplied from the CRUISE fuse 6 to the Powertrain Control Module (PCM). The PCM is grounded to the chassis. When the cruise control ON/OFF switch is on, ignition positive voltage is supplied to the PCM. If the driver has not pressed the brake pedal, ignition positive voltage is supplied through the cruise control brake release switch to the cruise cancel terminal of the PCM. When the driver presses the brake pedal, battery positive voltage is supplied from the STOP fuse 1 through the closed stop lamp switch to the brake signal input terminal of the PCM. When pressing R/A (resume/accelerate) on the control switch, ignition positive voltage is applied to the resume/accelerate terminal of the PCM. When the Set/Coast button is pressed on the cruise control switch, ignition positive voltage is applied to the set/coast terminal of the PCM.

The PCM receives a vehicle speed signal input from the Vehicle Speed Sensor Buffer (VSSB) module. In operation, the voltage varies between 0 V and 5 V. When vehicle speed is less than 40 km/h (25 mph) the PCM will prevent cruise control operation.