Cruise control is a speed control system that maintains a desired vehicle speed under normal driving conditions at vehicle speeds above 40 km/h (25 mph). Steep grades may cause variations in the selected vehicle speeds.

The following are the main components of the cruise control system:

The cruise control system will engage and adjust vehicle speed based on the activation of the following cruise control switches:

The cruise control resume/accel and set/coast switches are located on the multifunction/turn signal lever. The AUTO CRUISE on/off switch is located on the instrument panel. The AUTO CRUISE on/off switch is used in order to turn the cruise control system on and off.

The ECM monitors the signal circuits of the cruise control switches in order to determine when to capture and maintain the selected vehicle speed.

Ignition positive voltage is supplied from a 20-ampere circuit breaker, to the cruise control switches. When the normally open AUTO CRUISE on/off switch is turned On, the switch closes and the ECM detects a high signal voltage on the cruise control on switch signal circuit and the green AUTO CRUISE switch indicator also illuminates. When the normally open set/coast switch is pressed, the switch closes and the ECM detects a high signal voltage on the cruise control set/coast switch signal circuit. To engage the cruise control system, turn the AUTO CRUISE on/off switch On and momentarily press the set/coast switch. The ECM will confirm that the cruise control enable criteria has been achieved. The ECM will engage the cruise control system and record the selected vehicle speed. Pressing the accelerator pedal, while the cruise control system is engaged, will allow the driver to override the cruise control system in order to accelerate the vehicle beyond the current set vehicle speed. When the accelerator pedal is released, the vehicle will decelerate and resume the current set vehicle speed. The driver can also override the current set vehicle speed via the set/coast switch and the resume/accel switch. When the cruise control system is engaged, pressing and holding the set/coast switch will allow the vehicle to decelerate from the current set vehicle speed without deactivating the cruise control system. When the set/coast switch is released, the ECM will record the vehicle speed and maintain the vehicle speed as the new set vehicle speed.

When the cruise control system is engaged, momentarily pressing the set/coast switch will allow the vehicle to decelerate at 1.6 km/h (1 mph) increments for each time that the set/coast is momentarily pressed, with a minimum vehicle speed of 37 km/h (23 mph). When the normally open resume/accel switch is activated, the switch closes and the ECM detects a high signal voltage on the cruise control resume/accel switch signal circuit. Activating and holding the resume/accel switch, when the cruise control system is engaged, will allow the vehicle to accelerate to a greater vehicle speed than the current set vehicle speed. When the resume/accel switch is released, the ECM will record the vehicle speed and maintain the vehicle speed as the new set vehicle speed. When the cruise control system is engaged, momentarily activating the resume/accel switch will allow the vehicle to accelerate at 1.6 km/h (1 mph) increments for each time that the resume/accel switch is momentarily activated, with the maximum acceleration total of 16 km/h (10 mph) over the current set vehicle speed . Momentarily activating the resume/accel switch, after the cruise control system has been disengaged by pressing the brake pedal or the clutch pedal, will recall the previous set vehicle speed that is recorded in the ECM.

The ECM disengages the cruise control operation based on the signals from the following switches:

The stop lamp switch is mounted to the brake pedal bracket. Pressing the brake pedal while the cruise control is engaged will disengaged the cruise control system. The ECM monitors the stoplamp switch signal circuit. When the brake pedal is pressed, the normally open stoplamp switch closes. The ECM detects a high signal voltage on the stop lamp switch signal circuit. Depressing the clutch pedal while the cruise control is engaged will disengaged the cruise control system. When the clutch pedal is depressed, the normally closed clutch switch opens and the ECM detects a low signal voltage on the clutch switch signal circuit. The cruise control system will also disengage when the AUTO CRUISE on/off switch is turned OFF. The vehicle speed stored in the memory of the ECM will be erased when the AUTO CRUISE on/off switch is turned to OFF, or the ignition switch is turned OFF.

The cruise control system will disengage when the ECM detects that the driver has the accelerator pedal override active for approximately 60 seconds.

The ECM inhibits the cruise control operation when any of the following conditions exist: