Ford Workshop Service and Repair Manuals > Galaxy 2000.75 (04.2000-02.2006) > Mechanical Repairs | 3 Powertrain | 310 Fuel System | 310-03 Speed Control | Description and Operation | Diagnosis and Testing | Speed Control - Vehicles Built From: 11-2001 Vehicles Built Up To: 04-2002 2.0L-2.3L, Vehicles With: Steering Wheel Speed Contro

Speed Control - Vehicles Built From: 05-2002 Vehicles Built Up To: 10-2002 2.0L-2.3L, Vehicles With: Steering Wheel Speed Contro > < Speed Control - Vehicles Built From: 10-2002 2.0L-2.3L, Vehicles With: Steering Wheel Speed Control Switches

Speed Control - Speed Control—Vehicles Built From: 11/2001 Vehicles Built Up To: 04/2002 2.0L/2.3L, Vehicles With: Steering Wheel Speed Control Switches

Galaxy 2000.75 (04/2000-02/2006)

Diagnosis and Testing

Refer to Wiring Diagrams Section 310-03, for schematic and connector information.

Special Tool(s)

Hand Vacuum/Pressure Pump

416-D001 (23-036A)

Principles of Operation

The 2.0L and 2.3L petrol engine variant speed control system is vacuum operated with electronic control.

An overview of the vehicle speed control system actuator, deactivator switches, vacuum pump and line(s) is shown below.

Item

Part Number

Description

Speed control actuator

Vacuum pump

Speed control deactivator switches

The vacuum pump is electrically driven, this makes the system independent of intake manifold pressure. The speed control actuator is connected to the accelerator pedal, when vacuum is applied the actuator diaphragm acts via a rod onto the accelerator pedal. This eliminates the need for a separate vehicle speed control cable.

Both the brake pedal and clutch pedal (if equipped) have deactivator switches. The deactivator switch(es) has a combination of both electrical and pneumatic control. When the brake or clutch pedal is depressed the deactivator switch opens and vents the system's vacuum to atmosphere. The resultant loss of vacuum ensures that the throttle is completely closed. In addition to the deactivator switch venting to atmosphere, an electrical contact is opened in the deactivator switch, the loss of the ground signal is processed through the speed control module which opens the solenoid valve in the vacuum pump.

Inspection and Verification

Verify the customer concern.

Visually inspect for obvious signs of mechanical or electrical damage.

Visual Inspection Chart

Mechanical	Electrical
Vacuum line(s) Speed control deactivator switches Speed control actuator	Fuse(s) Wiring harness Electrical connector(s) Clutch pedal position (CPP) switch Brake pedal position (BPP) switch Vacuum pump Speed control module Steering wheel speed control switch(es) Steering wheel switch control module

If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.

If the concern is not visually evident, verify the symptom and refer to the Symptom Chart.

Symptom Chart

Symptom	Possible Sources	Action
The speed control is inoperative	* Vacuum line(s). * Clutch pedal position (CPP) switch. * Brake pedal position (BPP) switch. * Speed control actuator. * Circuit(s). * Vacuum pump. * Steering wheel speed control switch(es). * Steering wheel switch control module. * Speed control module.	* GO to Pinpoint Test A.