Cruise Control: Description and Operation

Vehicle Speed Control:

System operation
The speed control system is inoperative below 27 mile/h (43 kph) and inoperative above the following speeds:
120 mile/h (193 km) for vehicles with 3.0L engine and automatic transmission.
125 mile/h (201 km) for all other variants.
The speed control system is designed to maintain a selected vehicle speed between these two parameters.

Any of the switches operated by the brake or clutch pedal (vehicles fitted with manual transmission) will interrupt the speed control operation by switching the signal to the powertrain control module. This will allow the system to go into STANDBY mode. Pressing the RESUME switch with the vehicle travelling above 27 mile/h (43 kph) while the system is in STANDBY mode will allow the vehicle to accelerate until the last set speed is resumed.

Actuator Switches

ON Switch
When the ON switch is pressed the speed control system is activated. When the vehicle is travelling at a speed greater than 27 mile/h (43 kph) the speed control system will accept the speed inputs. The message center will inform the driver that the speed control has been activated in the form of a message displayed in the message center.

OFF Switch
When the OFF switch is pressed the speed control system is deactivated. The speed setting stored in the powertrain control module memory will be erased. The message center will inform the driver that the speed control has been activated in the form of a message displayed in the message center.

RESUME Switch
When the RESUME switch is pressed with the vehicle travelling above 27 mile/h (43 kph) with the system in STANDBY mode, allows the vehicle to accelerate until the last set speed is resumed. The RESUME switch will not function if the OFF switch has been pressed, the ignition switch has been turned off, or if the vehicle speed is below 27 mile/h (43 kph).

CANCEL Switch
When the CANCEL switch is pressed with the vehicle travelling above 27 mile/h (43 kph) the system will enter STANDBY mode.

SET Switch
When the SET switch is pressed with the vehicle travelling above 27 mile/h (43 kph) the system allows the vehicle speed to be maintained to ± 1 mile/h (1.62 kph). Pressing the SET switch will increase or decrease the vehicle speed respectively until the switch is released. If the respective switch is pressed momentarily, the speed will accelerate or decelerate in 1 mile/h increments.

Brake Pedal Position (BPP) Switch
If the brake pedal is depressed while the speed control system is active, the powertrain control module receives a signal from the brake pedal position switch. This will allow the vehicle to return to the current throttle position as demanded by the throttle pedal.

Switch-Deactivator, Speed Control
If the brake pedal is depressed while the speed control system is active, the powertrain control module receives a signal from the speed control deactivator switch. This will allow the vehicle to return to the current throttle position as demanded by the throttle pedal.

Clutch Pedal Position (CPP) Switch (with manual transmission)
If the clutch pedal is depressed while the speed control system is active, the powertrain control module receives a signal from the clutch pedal position switch. This will allow the vehicle to return to the current throttle position as demanded by the throttle pedal.