Cruise Control: Description and Operation
Speed Control - VIN Range: N52048->N99999
Speed Control:
System operation
The speed control system is inoperative below 32 kph (20 mile/h) and inoperative above 250 kph (155 mile/h).
The speed control system is designed to maintain a selected vehicle speed between 32 kph (20 mile/h) and 180 kph (112 mile/h).
Any of the switches operated by the brake will interrupt the speed control operation by switching the signal to the engine control module (ECM). This will allow the system to go into STANDBY mode. Pressing the RESUME switch with the vehicle travelling above 32 kph (20 mile/h) while the system is in STANDBY mode will allow the vehicle to accelerate until the last set speed is resumed.
Speed Control Steering Wheel Switches
RESUME Switch
When the RESUME switch is operated with the vehicle travelling above 32 kph (20 mile/h) with the system in STANDBY mode, the vehicle is allowed to accelerate until the last set speed is resumed. The RESUME switch will not function if the ignition switch has been cycled or if the vehicle speed is below 32 kph (20 mile/h).
CANCEL Switch
When the CANCEL switch is operated with the vehicle travelling above 32 kph (20 mile/h) the system will enter STANDBY mode. SET Switch When the SET +/- switch is operated with the vehicle travelling above 32 kph (20 mile/h) the system allows the vehicle speed to be maintained to ± 1.62 kph (1 mile/h). 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 1.62 kph (1 mile/h) increments.
Brake Pedal Position (BPP) Switch
If the brake pedal is operated while the speed control system is active, the ECM receives a signal from the BPP switch. This will cancel vehicle speed control and allow the throttle blade to return to the position as demanded by the accelerator pedal.
Speed Control Deactivation Switch (brake).
If the brake pedal is activated while the speed control system is active, the ECM receives a signal from the speed control deactivation switch. This will cancel speed control and allow the throttle blade to return to the position as demanded by the accelerator pedal.
Clutch Pedal Position Sensor
If the clutch pedal is activated while the speed control system is active, the ECM receives a signal from the clutch pedal position switch. This will cancel speed control and allow the throttle blade to return to the position as demanded by the accelerator pedal.
Adaptive Speed Control
On vehicles for certain markets, an adaptive speed control system is installed as an option. In addition to the normal vehicle speed control functions, this system enables a preset distance to be maintained behind a moving vehicle immediately ahead, without driver intervention.
Automatic Switch Off - Vehicles with Adaptive Speed Control
The adaptive speed control will disengage, but not clear the memory when:
- the CANCEL button is operated.
- the brake pedal is applied.
- the vehicle speed falls below 32 kph (20 mile/h).
- neutral, park or reverse gear positions are selected.
- traction control is activated.
- cruise override activated for more than five minutes.
The adaptive speed control will disengage, and clear the memory when:
- the ignition switch is set to position '0'.
- a fault occurs in the adaptive speed control system.
Message center
The message center will keep the driver informed by displaying messages and warnings.
Forward Alert Switch - Vehicles with Adaptive Speed Control
Forward Alert
The forward alert system is switched on and off by the forward alert switch, which is incorporated into the message center switch. The forward alert system additionally provides warnings while the adaptive speed control is not activated.
Speed Control Module - Vehicles with Adaptive Speed Control
The speed control module provides system control functions.
Speed Control Sensor - Vehicles with Adaptive Speed Control
The speed control sensor incorporates the forward looking radar sensor.
Adaptive Speed Control Failure
If a fault occurs during any adaptive speed control operation, the adaptive speed control system will deactivate and will remain in this state until the fault is rectified. The 'CRUISE NOT AVAILABLE' message will be displayed on the message center on 'demand' by trying to operate the steering wheel control switches. This on 'demand' strategy is intended to show that adaptive speed control is not available and another fault may exist. For example: If an anti-lock brake system or traction control error message is displayed this would imply that the brake system may be effecting or inhibiting the adaptive speed control. If the message center displays 'CRUISE NOT AVAILABLE' permanently or no message is displayed, this may imply that the vehicle has an ECM fault.