Speed control

Tightening torque specification

Name	Nm	Pound foot	Pound-inch
Speed control actuator nuts	6	-	53
Speed Control Switch Bolts	5	-	44

Pos.	Spare Part No	Name
1	-	Speed control system drive cable
2	-	Speed control switches
3	-	Speed control system servo unit
4	-	Clutch pedal position switch (vehicles with manual transmission in block with the driving axle)
5	-	Vehicle speed sensor
6	-	Brake light switch
7	-	Deactivator switch

The speed control system is controlled by five switches located on the steering wheel. The functions of the system are as follows:

The speed control module sends signals to the actuator, which changes the position of the throttle valve using an internal gear train and a drive cable. The speed control sensor generates a reference signal, which is compared by the servo unit with the speed value set by the driver. If there is a difference, the stepper servo motor will adjust the position of the throttle valve, correcting the speed of the car.

ON	Turning on the system
OFF	Shutting down the system
+ (SET/ACC)	Tuning/Acceleration and Step Speed Increase
- (COAST)	Inertial motion and stepwise reduction of speed
= (RESUME)	Renewal

Any of the switches, actuated by the brake or clutch pedal (vehicles equipped with a manual transmission), will activate the cruise control servo unit by closing the throttle valve.

Speed control system actuator

The servo unit of the speed control system is located on the partition. It combines the following elements:

• Electronic module
• An actuator consisting of a stepper motor, an electromagnetic clutch and a reduction gear transmission.

Speed control system servo unit

The speed control servo unit compares the speed signal from the vehicle speed sensor and the commands from the switches. It adjusts the throttle position to maintain a constant vehicle speed.

When the clutch pedal (vehicles with manual transmission) or the brake pedal is pressed, the servo unit of the speed control system switches off the speed control system. The servo unit enters the speed control system interrupt mode.

Speed control system switches

When the "ON" switch is pressed while the vehicle is traveling at a speed exceeding 48 km/h (30 mph), the speed control actuator receives speed input signals.



The + (SET/ACC) switch is used to adjust the speed or acceleration of the vehicle when the vehicle is moving at speeds exceeding 48 km/h (30 mph). The switch can be used in three ways.

• Accelerate the car to the desired speed using the accelerator pedal, press and release the + (SET/ACC) switch. The car will maintain the selected speed.
• Press and hold the + (SET/ACC) switch until the vehicle reaches the desired speed. Once released, the speed value will be stored in memory and used to maintain the vehicle speed.
• Press the + (SET/ACC) switch repeatedly to increase vehicle speed in steps of 1.6 km/h (1 mph).

Switch - (COAST) is used to reduce the speed of the vehicle. The switch can be used in two ways:

• Press and hold the - (COAST) switch until the vehicle slows down to the desired speed. When you release the switch, the speed value will be stored in memory and used to maintain the selected speed.
• Press the - (COAST) switch repeatedly to decrease vehicle speed in steps of 1.6 km/h (1 mph).

Pressing the = (RESUME) switch returns the vehicle to the selected speed when the speed control system is in the system interrupt mode. Pressing and releasing the = (RESUME) switch at any speed above 48 km/h (30 mph) will return the vehicle to the pre-selected speed.



Pressing the OFF switch turns off the speed control system. The speed value stored in memory will be erased.

Brake light switch

If you lightly press the brake pedal while the speed control system is on, the servo unit will receive an input signal from the brake light switch. This will cause the speed control servo unit to close the throttle valve at a controlled speed. The speed control system will enter the system interrupt mode.

Deactivator switch

If the brake pedal is quickly depressed while the speed control system is engaged, the speed control servo unit will receive an input signal from the deactivator switch. This will cause the electromagnetic clutch to disengage from the stepper motor and turn off. This will allow the cable to close the throttle valve under the action of the throttle return spring. The speed control system will enter the system interrupt mode.

Clutch pedal position switch (CPP) (in versions with a manual transmission in a block with a driving axle)

If the clutch pedal is depressed while the speed control system is engaged, the speed control servo unit will receive an input signal from the clutch pedal position switch. This will cause the servo unit to disengage and close the throttle valve at a controlled speed. The speed control system will enter the system interrupt mode.