ford Workshop Repair Guides

Ford Workshop Service and Repair Manuals

ABOUT US
Speed Control - Vehicles Built From: 11-2001 Vehicles Built Up To: 10-2002 2.8L-1.9L Diesel, Vehicles With: Steering Wheel Speed > < Speed Control - Vehicles Built Up To: 10-2002 2.8L-1.9L Diesel, Vehicles With: Steering Column Speed Control Switch

Galaxy 2000.75 (04.2000-02.2006)

Speed Control - Speed Control—Vehicles Built Up To: 10/2001 2.8L/1.9L Diesel, 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.

General Equipment
Worldwide Diagnostic System (WDS)

Principles of Operation

The 1.9L diesel and the 2.8L engine variant speed control systems are electronically controlled via the Powertrain Control Module (PCM).

Inspection and Verification

  1. Verify the customer concern.
  1. Visually inspect for obvious signs of electrical damage.

Visual Inspection Chart

Electrical
  • Fuse(s)
  • Wiring harness
  • Electrical connector(s)
  • Clutch pedal position (CPP) switch
  • Brake pedal position (BPP) switch
  • Steering wheel speed control switch(es)
  • Steering wheel switch control module
  • PCM
  1. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
  1. If the concern is not visually evident, connect the diagnostic tool to the data link connector (DLC) and select the Diagnostic Menu/ Powertrain/ Driveability/ Display/Service Continuous Memory.
  1. Retrieve the Diagnostic Trouble Code (DTC)s and refer to the DTC Index Chart.
  1. If no DTC's are retrieved, proceed to the Symptom Chart to continue diagnosis.

Diagnostic Trouble Code (DTC) Index Chart

DTC Index Chart

Condition Possible Sources Action
DTC P0568 Speed control set signal
  • Speed control switch.
  • Steering wheel switch control module.
  • PCM.
  • GO to Pinpoint Test A.

Symptom Chart

Symptom Chart

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

Pinpoint Test

NOTE:
NOTE:Use a digital multimeter for all electrical measurements.

PINPOINT TEST A : THE SPEED CONTROL IS INOPERATIVE
TEST CONDITIONS DETAILS/RESULTS/ACTIONS
A1: CHECK THE PEDAL POSITION SWITCHES USING WDS
1
Using WDS Cruise control test, check the operation of the clutch pedal position (CPP) switch (if equipped) and brake pedal position (BPP) switch.

Are the pedal position switches working correctly?
Yes
GO to A2.
No
The CPP switch is inoperative. Vehicles with 1.9L Diesel engines, GO to A12.
Vehicles with 2.8L engines, GO to A14.
The BPP switch is inoperative. Vehicles with 1.9L Diesel engines, GO to A16.
Vehicles with 2.8L engines, GO to A18.
A2: CHECK FOR POWER AND GROUND TO THE STEERING WHEEL SWITCHES AND STEERING WHEEL SWITCH CONTROL MODULE
1
Check the function of the vehicle horn.
2
Ignition switch in position II.
3
Press each of the vehicle horn switches in turn.

Does the vehicle horn sound?
Yes
GO to A3.
No
GO to A20.
A3: CHECK FOR POWER TO THE INSTRUMENT CLUSTER SPEED CONTROL ILLUMINATION
1
Check the function of the steering wheel speed control ON switch.
2
Operate the steering wheel speed control ON switch.

Is the instrument cluster speed control illumination on?
Yes
Vehicles with 1.9L Diesel engines, GO to A4.
Vehicles with 2.8L engines, GO to A8.
No
GO to A24.
A4: CHECK THE STEERING WHEEL SWITCH CONTROL MODULE TO PCM CIRCUIT FOR OPEN
1
Disconnect Steering wheel switch control module C544.
2
Disconnect PCM C52b.

3
Measure the resistance between the steering wheel switch control module C544 pin 4, (BK/WH), harness side and PCM C52b pin 14, (BK/WH), harness side.

Is the resistance less than 5 ohms?
Yes
GO to A5.
No
REPAIR the circuit. TEST the system for normal operation.
A5: CHECK THE STEERING WHEEL SWITCH CONTROL MODULE TO PCM SET CIRCUIT FOR OPEN

1
Measure the resistance between the steering wheel switch control module C544 pin 8, (RD), harness side and PCM C52b pin 44, (RD), harness side.

Is the resistance less than 5 ohms?
Yes
GO to A6.
No
REPAIR the circuit. TEST the system for normal operation.
A6: CHECK THE STEERING WHEEL SWITCH CONTROL MODULE TO PCM CAN CIRCUIT FOR OPEN

1
Measure the resistance between the steering wheel switch control module C544 pin 14, (GY), harness side and PCM C52b pin 46, (GY), harness side.

Is the resistance less than 5 ohms?
Yes
GO to A7.
No
REPAIR the circuit. TEST the system for normal operation.
A7: CHECK THE STEERING WHEEL SWITCH CONTROL MODULE TO PCM RES CIRCUIT FOR OPEN

1
Measure the resistance between the steering wheel switch control module C544 pin 16, (BU/GY), harness side and PCM C52b pin 45, (BU/GY), harness side.

Is the resistance less than 5 ohms?
Yes
INSTALL a new steering wheel switch control module. TEST the system for normal operation. If the steering wheel switch control module is OK, INSTALL a new drivers airbag module. REFER to Section  501-20 Supplemental Restraint System. TEST the system for normal operation. If the steering wheel switches are OK, INSTALL a new PCM. REFER to Section  303-14A Electronic Engine Controls / 303-14B Electronic Engine Controls / 303-14C Electronic Engine Controls. TEST the system for normal operation.
No
REPAIR the circuit. TEST the system for normal operation.
A8: CHECK THE STEERING WHEEL SWITCH CONTROL MODULE TO PCM CIRCUIT FOR OPEN
1
Disconnect Steering wheel switch control module C544.
2
Disconnect PCM C51b.

3
Measure the resistance between the steering wheel switch control module C544 pin 4, (BK/WH), harness side and PCM C51b pin 38, (BK/WH), harness side.

Is the resistance less than 5 ohms?
Yes
GO to A9.
No
REPAIR the circuit. TEST the system for normal operation.
A9: CHECK THE STEERING WHEEL SWITCH CONTROL MODULE TO PCM SET CIRCUIT FOR OPEN

1
Measure the resistance between the steering wheel switch control module C544 pin 8, (BU/BN), harness side and PCM C51b pin 57, (BU/BN), harness side.

Is the resistance less than 5 ohms?
Yes
GO to A10.
No
REPAIR the circuit. TEST the system for normal operation.
A10: CHECK THE STEERING WHEEL SWITCH CONTROL MODULE TO PCM CAN CIRCUIT FOR OPEN

1
Measure the resistance between the steering wheel switch control module C544 pin 14, (BK/YE), harness side and PCM C51b pin 76, (BK/YE), harness side.

Is the resistance less than 5 ohms?
Yes
GO to A11.
No
REPAIR the circuit. TEST the system for normal operation.
A11: CHECK THE STEERING WHEEL SWITCH CONTROL MODULE TO PCM RES CIRCUIT FOR OPEN

1
Measure the resistance between the steering wheel switch control module C544 pin 16, (BU), harness side and PCM C51b pin 75, (BU), harness side.

Is the resistance less than 5 ohms?
Yes
INSTALL a new steering wheel switch control module. TEST the system for normal operation. If the steering wheel switch control module is OK, INSTALL a new drivers airbag module. REFER to Section  501-20 Supplemental Restraint System. TEST the system for normal operation. If the steering wheel switches are OK, INSTALL a new PCM. REFER to Section  303-14A Electronic Engine Controls / 303-14B Electronic Engine Controls / 303-14C Electronic Engine Controls. TEST the system for normal operation.
No
REPAIR the circuit. TEST the system for normal operation.
A12: CHECK POWER TO THE CPP SWITCH
1
Disconnect CPP switch C356.
2
Ignition switch in position II.

3
Measure the voltage between the CPP switch C356 pin 1, (BK/YE), harness side and ground.

Is the voltage greater than 10 volts?
Yes
GO to A13.
No
REPAIR the circuit. TEST the system for normal operation.
A13: CHECK THE CPP SWITCH CIRCUIT FOR OPEN
1
Ignition switch in position 0.
2
Disconnect PCM C52b.

3
Measure the resistance between the CPP switch C356 pin 2, (WH/RD), harness side and PCM C52b pin 66, (WH/RD), harness side.

Is the resistance less than 5 ohms?
Yes
CHECK the CPP switch, refer to the wiring diagrams for additional information. INSTALL a new CPP switch as necessary. If the CPP switch is OK, INSTALL a new PCM. REFER to Section  303-14A Electronic Engine Controls / 303-14B Electronic Engine Controls / 303-14C Electronic Engine Controls. TEST the system for normal operation.
No
REPAIR the circuit. TEST the system for normal operation.
A14: CHECK POWER TO THE CPP SWITCH
1
Disconnect CPP switch C154.
2
Ignition switch in position II.

3
Measure the voltage between the CPP switch C154 pin 1, (BK), harness side and ground.

Is the voltage greater than 10 volts?
Yes
GO to A15.
No
REPAIR the circuit. TEST the system for normal operation.
A15: CHECK THE CPP SWITCH CIRCUIT FOR OPEN
1
Ignition switch in position 0.
2
Disconnect PCM C51b.

3
Measure the resistance between the CPP switch C154 pin 2, (BK/WH), harness side and PCM C51b pin 39, (BK/WH), harness side.

Is the resistance less than 5 ohms?
Yes
CHECK the CPP switch, refer to the wiring diagrams for additional information. INSTALL a new CPP switch as necessary. If the CPP switch is OK, INSTALL a new PCM. REFER to Section  303-14A Electronic Engine Controls / 303-14B Electronic Engine Controls / 303-14C Electronic Engine Controls. TEST the system for normal operation.
No
REPAIR the circuit. TEST the system for normal operation.
A16: CHECK POWER TO THE BPP SWITCH
1
Disconnect BPP switch C354.
2
Ignition switch in position II.

3
Measure the voltage between the BPP switch C354 pin 2, (BK/YE), harness side and ground.

Is the voltage greater than 10 volts?
Yes
GO to A17.
No
REPAIR the circuit. TEST the system for normal operation.
A17: CHECK THE BPP SWITCH CIRCUIT FOR OPEN
1
Ignition switch in position 0.
2
Disconnect PCM C52b.

3
Measure the resistance between the BPP switch C354 pin 3, (WH/YE), harness side and PCM C52b pin 65, (WH/YE), harness side.

Is the resistance less than 5 ohms?
Yes
CHECK the BPP switch, refer to the wiring diagrams for additional information. INSTALL a new BPP switch as necessary. If the BPP switch is OK, INSTALL a new PCM. REFER to Section  303-14A Electronic Engine Controls / 303-14B Electronic Engine Controls / 303-14C Electronic Engine Controls. Test the system for normal operation.
No
REPAIR the circuit. TEST the system for normal operation.
A18: CHECK POWER TO THE BPP SWITCH
1
Disconnect BPP switch C153.
2
Ignition switch in position II.

3
Measure the voltage between the BPP switch C153 pin 2, (BK), harness side and ground.

Is the voltage greater than 10 volts?
Yes
GO to A19.
No
REPAIR the circuit. TEST the system for normal operation.
A19: CHECK THE BPP SWITCH CIRCUIT FOR OPEN
1
Ignition switch in position 0.
2
Disconnect PCM C51b.

3
Measure the resistance between the BPP switch C153 pin 3, (WH/YE), harness side and PCM C51b pin 55, (WH/YE), harness side.

Is the resistance less than 5 ohms?
Yes
CHECK the BPP switch, refer to the wiring diagrams for additional information. INSTALL a new BPP switch as necessary. If the BPP switch is OK, INSTALL a new PCM. REFER to Section  303-14A Electronic Engine Controls / 303-14B Electronic Engine Controls / 303-14C Electronic Engine Controls. Test the system for normal operation.
No
REPAIR the circuit. TEST the system for normal operation.
A20: CHECK FOR POWER TO THE STEERING WHEEL SWITCH CONTROL MODULE FOR POWER
1
Ignition switch in position 0.
2
Disconnect Steering wheel switch control module C544.
3
Ignition switch in position II.

4
Measure the voltage between the steering wheel switch control module C544 pin 12, (BK/YE), harness side and ground and steering wheel switch control module C544 pin 13, (RD/WH), harness side and ground.

Are the voltages greater than 10 volts?
Yes
GO to A21.
No
REPAIR the circuit. TEST the system for normal operation.
A21: CHECK THE STEERING WHEEL SWITCH CONTROL MODULE FOR GROUND

1
Measure the resistance between the steering wheel switch control module C544 pin 10, (BN), harness side and ground.

Is the resistance less than 5 ohms?
Yes
GO to A22.
No
REPAIR the circuit. TEST the system for normal operation.
A22: CHECK THE STEERING WHEEL SWITCHES FOR POWER
1
Disconnect Clock spring C546.

2
Measure the voltage between the clock spring C546 pin 3, (BK/YE), harness side and ground.

Is the voltage greater than 10 volts?
Yes
GO to A23.
No
REPAIR the circuit. TEST the system for normal operation.
A23: CHECK THE CLOCK SPRING FOR OPEN CIRCUIT
1
Remove the drivers airbag module. REFER to Section  501-20 Supplemental Restraint System.

2
Measure the resistance between the clock spring C546 pin 3, component side and the clock spring to drivers airbag module connector pin 3, component side.

Is the resistance less than 1 ohm?
Yes
INSTALL a new steering wheel switch control module. TEST the system for correct operation. If the steering wheel switch control module is OK, INSTALL a new drivers airbag module. REFER to Section  501-20 Supplemental Restraint System. TEST the system for correct operation.
No
INSTALL a new clock spring. TEST the system for normal operation.
A24: CHECK THE STEERING WHEEL SPEED CONTROL SWITCH CIRCUIT FOR POWER
1
Ignition switch in position 0.
2
Disconnect Steering wheel switch control module C544.
3
Ignition switch in position II.
4
Operate the steering wheel speed control ON switch.

5
Measure the voltage between the steering wheel switch control module C544 pin 4, (BK/WH),harness side and ground.

Is the voltage greater than 10 volts?
Yes
INSTALL a new steering wheel switch control module. TEST the system for normal operation.
No
GO to A25.
A25: CHECK THE STEERING WHEEL SPEED CONTROL SWITCH CIRCUIT FOR OPEN
1
Ignition switch in position 0.
2
Disconnect Clock spring C546.

3
Measure the resistance between the steering wheel switch control module C544 pin 4, (BK/WH), harness side and clock spring C546 pin 4, BK/WH), harness side.

Is the resistance less than 5 ohms?
Yes
GO to A26.
No
REPAIR the circuit. TEST the system for normal operation.
A26: CHECK THE CLOCK SPRING FOR OPEN
1
Remove the drivers airbag. REFER to Section  501-20 Supplemental Restraint System.

2
Measure the resistance between the clock spring C546 pin 4, component side and clock spring to drivers airbag module connector pin 4 component side.

Is the resistance less than 1 ohm?
Yes
INSTALL a new drivers airbage module. REFER to Section  501-20 Supplemental Restraint System. TEST the system for normal operation.
No
INSTALL a new clock spring. TEST the system for normal operation.

Speed Control - Vehicles Built From: 11-2001 Vehicles Built Up To: 10-2002 2.8L-1.9L Diesel, Vehicles With: Steering Wheel Speed > < Speed Control - Vehicles Built Up To: 10-2002 2.8L-1.9L Diesel, Vehicles With: Steering Column Speed Control Switch