Speed Control Ford Explorer Sport Trac I

Torque Specifications

TORQUE SPECIFICATIONS

The vehicle speed control system consists of the following components

1. speed control servo
2. speed control switches
3. speed control cable
4. deactivator switch

It is normal for the engine rpm to increase slightly and then drop off slowly when the clutch pedal is depressed during operation.

Refer to SYSTEM WIRING DIAGRAMS for schematic and connector information.

Scheme 1

Principles of Operation

The speed control system is designed to maintain a selected vehicle speed between 48 and 200 km/h (30 and 125 mph).

Whenever the system is engaged and active, a speed control set indicator will be illuminated in the instrument cluster.

The brake pedal position (BPP) switch is normally closed to ground. When the brake pedal is applied with the speed control system engaged, the BPP switch closes to battery voltage, putting the speed control in stand-by mode.

Note. A redundant brake deactivator switch is provided as an additional safety feature.

The clutch pedal position (CPP) switch is incorporated on vehicles equipped with manual transmissions. When the clutch pedal is applied with the vehicle speed control system engaged, the normally closed switch opens and signals the speed control module to deactivate the speed control.

Note. The speed control module is integral to the speed control servo.

Normally, when the brake pedal is depressed, the speed control module deactivates the speed control system. Under increased brake pedal effort, the deactivator switch, a normally closed switch, will open and remove power to the speed control servo clutch, releasing the throttle independently of the speed control module.

The clockspring provides the electrical interface between the steering column wiring and the speed control switches in the steering wheel.

The inputs to the speed control servo are the

1. vehicle speed signal
2. speed control switches
3. brake pedal position (BPP) switch

1. clutch pedal position (CPP) switch
2. deactivator switch

The outputs of the speed control servo are the

1. speed control indicator
2. speed control cable controlled throttle position

Inspection and Verification

Note. If any concerns are noted with the speedometer, stoplamps, or horn, address those concerns by referring to the appropriate sections before continuing speed control diagnosis.

1. Verify the customer concern by operating the speed control system.
2. Visually inspect for obvious signs of mechanical and electrical damage. Visual Inspection Chart VISUAL INSPECTION CHART Mechanical Electrical Speed control cable Speed control cable throttle attachment Central junction box (CJB) fuses: 9 (7.5A) 10 (7.5A) 13 (15A) Battery junction box (BJB) maxi-fuse: 10 (15A) Circuitry Speed control switches Deactivator switch Clutch pedal position (CPP) switch Brake pedal position (BPP) switch Bulb
3. If the fault is not visually evident, verify the symptom and refer to «SELF-TEST DIAGNOSTICS»(/ford/explorer-sport-trac/i-2000-2005/remont/cruise-control-systems/#speed-control__self-test-diagnostics) .

Self-Test Diagnostics

1. Enter self-test diagnostics by depressing the speed control OFF switch while turning the ignition key on, making sure the engine does not start and is not running. The speed control indicator lamp on the instrument panel will flash once to indicate that the speed control module entered the diagnostic mode. Five additional flashes at this point indicate a defective speed control servo. Release the OFF switch.
2. Press the remaining switches in this sequence: ON, RSM (resume), CST (coast) and SET/ACCEL.
3. The speed control indicator lamp will flash as each switch is pressed. Press each switch in the sequence immediately after the light goes out for the previous switch.
4. A lamp flash with the last button (SET/ACCEL) indicates that the STATIC test passed. If the lamp does not flash with the last button and there are no additional flashes of the lamp, the switch is defective. If the lamp does not flash with the last button, and the additional flashes occur, follow the chart below the trouble codes: 2 flashes: Brake pedal position (BPP) switch is defective, circuit is defective, or brake pedal is applied; clutch pedal position (CPP) switch is defective, circuit is defective, or clutch pedal is applied. 3 flashes: Brake deactivation switch is open or circuit is defective. 4 flashes: Vehicle speed signal is out of range or circuit is defective.
5. Immediately (.25 second delay) after the static test has passed, the speed control servo will carry out a dynamic test automatically by actuating the throttle lever from 8 to 10 mm (.31 to .47 inch) of travel from the idle position. During the dynamic throttle pull, observe throttle movement to witness any binding or sticking of the speed control cable, verify the correct connection of the speed control cable to the throttle lever, and make sure the throttle returns back to the idle position. If incorrect connection and/or binding or sticking of the speed control is observed, go to the «SYMPTOM CHART»(/ford/explorer-sport-trac/i-2000-2005/remont/cruise-control-systems/#speed-control__symptom-chart) .
6. Return the ignition switch to the OFF position and proceed to the «SYMPTOM CHART»(/ford/explorer-sport-trac/i-2000-2005/remont/cruise-control-systems/#speed-control__symptom-chart) .

Symptom Chart

Note. Self-test diagnostics must be carried out before proceeding to the SYMPTOM CHART .

SYMPTOM CHART

Scheme 2

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Scheme 26

1. Remove the speed control actuator cable clip.
2. Adjust the speed control actuator cable. Hold the throttle body cam is in the closed position. Pull on the speed control actuator cable housing to remove any slack. Back off the speed control actuator cable one notch and install the clip.

Scheme 27

Scheme 28

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Scheme 30

1. Remove the steering wheel. For additional information, refer to «WHEEL»(/ford/explorer-sport-trac/i-2000-2005/remont/steering-column/#steering-column) .
2. Remove the screws and the steering wheel rear cover.
3. Remove the ribbon harness from the clips.
4. Disconnect the horn contact electrical connectors.
5. Remove the screws and the right side horn contact.
6. Remove the screws and the speed control switch assembly.
7. To install, reverse the removal procedure.

Scheme 31

1. Disconnect the battery ground cable.
2. Disconnect the speed control deactivator switch electrical connector.
3. Remove the speed control deactivator switch.
4. To install, reverse the removal procedure. Bleed the brake system. For additional information, refer to «BLEEDING BRAKE SYSTEM»(/ford/explorer-sport-trac/i-2000-2005/remont/mechanical-hydraulic/#disc-brakes-drum-brakes__bleeding-brake-system) .

Removal and Installation

Note. For early production and late production identification (Scheme 34)and see scheme 36.

Early production vehicles

Scheme 32

Scheme 33

Scheme 34

Scheme 35

1. Disconnect the electrical connector.
2. Depress the locking tab and rotate the speed control cable cap to remove.
3. Disconnect the speed control cable from the speed control servo pulley. Gently push the retaining spring. Disconnect the speed control cable slug.
4. Remove the bolt and the speed control servo and bracket.
5. Remove the bolts and separate the bracket from the speed control servo.
6. To install, reverse the removal procedure.

See also:
• WHEEL
• BLEEDING BRAKE SYSTEM
• SELF-TEST DIAGNOSTICS
• SYMPTOM CHART
• PINPOINT TEST A: THE SPEED CONTROL IS INOPERATIVE - NO FLASH CODES