Ford Workshop Service and Repair Manuals

The speed control system is operated by means of five switches on the steering wheel. The functions are:

The speed control module provides signals to the actuator. The actuator moves the throttle by means of an internal geartrain and an actuator cable. The vehicle speed sensor generates the reference signal that the servo compares to the set speed selected by the driver. If a discrepancy exists the stepper servo will adjust the throttle, correcting the vehicle speed.

ON	Activate system
OFF	De-activate system
+ (SET/ACC)	Set/Accelerate and tap up
- (COAST)	Coast and tap down
= (RESUME)	Resume

Any of the switches operated by the brake or clutch pedal (vehicles fitted with manual transaxle) will activate the speed control servo by closing the throttle.

Speed Control Actuator

The speed control servo is mounted on the bulkhead. The speed control servo incorporates the following components:

• An electronic module
• An actuator consists of a stepper motor and geartrain electromagnetic coupling and reduction gearing

Speed Control Servo

The speed control servo evaluates the incoming speed signal from the speed sensor and switch inputs. It adjusts the throttle to maintain a constant vehicle speed.

If the clutch pedal (vehicles with manual transaxle) or the brake pedal are depressed, the speed control servo deactivates the speed control. The servo is will enter a stand by mode.

Speed Control Switches

When the ON switch is pressed and the vehicle is travelling at a speed greater than 48 km/h (30 mph) the speed control actuator will accept speed inputs.

The + (SET/ACC) switch is used to set or accelerate the vehicle at speeds above 48 km/h (30 mph). The switch can be used in three ways.

• Accelerate the vehicle with the accelerator pedal to the required speed, press and release the + (SET/ACC) switch, the vehicle will then maintain the required speed.
• Press the + (SET/ACC) switch and hold it down until the vehicle reaches the required speed. When released, the speed is stored in the memory and used to maintain the vehicle speed.
• Press the + (SET/ACC) switch repeatedly in order to increase the vehicle speed by increments of 1.6 km/h (1 mph).

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

• Press and hold the - (COAST) switch down until the vehicle slows to the required speed. When the switch is released, the speed is stored in the memory and used to maintain the vehicle speed.
• Press the - (COAST) switch repeatedly to reduce the vehicle road speed by increments of 1.6 km/h (1 mph).

Pressing the = (RESUME) switch returns the vehicle to the set speed when speed control is in the stand by mode. Pressing and releasing the = (RESUME) switch at any speed greater than 48 km/h (30 mph) will return the vehicle to the previous set speed.

Pressing the OFF switch deactivates the speed control system. The speed setting stored in memory will be erased.

Stop Lamp Switch

If the brake pedal is tapped lightly while the speed control system is active, the servo receives an input from the stop lamp switch. This causes the speed control servo to close the throttle at a controlled rate. The system is put in stand by mode.

Deactivator Switch

If the brake pedal is depressed rapidly while the speed control system is active, the speed control servo receives a input from the deactivator switch. This causes, the electromagnetic actuated coupling to disconnect from the stepper motor and deactivate. This allows the cable and throttle to close under throttle return spring control. The system is put in stand by mode.

Clutch Pedal Position (CPP) Switch (with manual transaxle)

If the clutch pedal is depressed while the speed control system is active, the speed control servo receives an input from the clutch pedal position switch. This causes the speed control servo to deactivate and close the throttle at a controlled rate. The system is put in a stand by mode.