Cruise Control General

Both the P72 and the P92 chassis are equipped with cruise control but both use different systems. The cruise control on the P72 chassis maintains the vehicle's speed by controlling the electronic throttle. The P92 chassis maintains vehicle speed through an actuator motor and a throttle cable.

The main components of both systems are the control switches, the cruise control module, the vehicle speed sensor (VSS), the electrical release switches and the wiring harness. The P92 chassis also has an actuator motor and a throttle cable assembly. These components work together to increase the driver's comfort by maintaining a desired road speed.

The cruise control module contains a low speed limit that will prevent engagement below 40 km/h (25 mph). The control module functions in response to the operator's input. On the P72 chassis, the controls are located on the multifunction lever on the steering column. The P92 chassis controls are mounted on the instrument panel by the coach manufacturer.

The stop lamp switch also functions as a cruise control release switch in both models. The system will also disengage if the transmission is shifted into neutral or is canceled by the operator.

Cruise Control P72 Circuit Operation

The cruise control regulates the speed of the vehicle in response to the driver's commands.

The cruise control contains electronic circuitry and a stepper motor. The other system components are the cruise control, the "SET" and brake switches and the vehicle speed sensor (VSS).

The cruise control module receives voltage from the GAGES fuse in RUN or START. A speed signal is received from the VSS buffer. The driver gives input to the cruise control module through the system components listed above. The cruise control module circuity receives the driver's input and generates electrical impulses. These pulses cause the stepper motor and its output reel to rotate. The throttle is controlled by a cable wound on the output reel. The cruise control module also contains a clutch which releases the cable when the cruise control system must be shut off. This clutch will operate when the brake pedal is depressed, the cruise control system is turned off or the cruise control system detects a failure.

Cruise Control P92 Circuit Operation

The cruise control regulates the speed of the vehicle in response to the driver's commands.

The cruise control contains electronic circuitry and a stepper motor. The other system components are the cruise control, SET and brake switches and the vehicle speed sensor (VSS).

The cruise control module receives voltage from the GAGES fuse in RUN or START. A speed signal is received from the VSS buffer. The driver gives his input to the cruise control module through the system components listed above. The cruise control module circuitry receives the driver's input and generates electrical impulses. These pulses cause the stepper motor and its output reel to rotate. The throttle is controlled by a cable wound on the output reel. The cruise control module also contains a clutch which releases the cable when the cruise control system must be shut off. This clutch will operate when the brake pedal is depressed, the cruise control system is turned off, or the cruise control system detects a failure.