2003 FORD MUSTANG Workshop Manual

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Page 3009 of 4378

FORD MUSTANG 2003 Workshop Manual SPECIFICATIONS
SECTION 310-
03: Speed Control 2003 Mustang Workshop Manual Torque Specifications
Description Nm lb-
ft lb-
in Battery ground cable 7-
10 — 62-89
Horn contact screws 6.5-
7

Page 3010 of 4378

FORD MUSTANG 2003 Workshop Manual DESCRIPTION AND OPERATION
Speed Control
The speed control system consists of the following components:
�zspeed control actuator cable (9A825)
�z deactivator switch
�z output shaft sensor (OSS)
�

Page 3011 of 4378

FORD MUSTANG 2003 Workshop Manual DIAGNOSIS AND TESTING
Speed Control
Refer to Wiring Diagrams Cell
31 , Speed Control for schematic and connector information.
Principles of Operation
The speed control system is designed to main

DIAGNOSIS AND TESTING
Speed Control
Refer to Wiring Diagrams Cell
31 , Speed Control for schematic and connector information.
Principles of Operation
The speed control system is designed to maintain vehicle speed above 48 km/h (30 mph). After the
ON switch is depressed, depressing the SET/ACCEL switch will activate the speed control servo. To
increase a set speed, either depress and hold for continuous acceleration, or momentarily tap the
SET/ACCEL switch for 1.6 km/h (1 mph) acceleration increments. To decrease a set speed, depress
and hold the COAST switch until the target speed is reached, or momentarily tap the COAST switch
for 1.6 km/h (1 mph) deceleration increments. When the speed control system has been disabled by
tapping the brake pedal, the RESUME switch can be depressed and the vehicle will return to the
original set speed if the vehicle is traveling over 48 km/h (30 mph) and the OFF switch has not been
depressed.
NOTE: The deactivator switch is provided as an additional safety feature. Normally, when the brake
pedal is depressed, an electrical signal from the brake lamp circuit to the speed control servo will
deactivate the system. Under increased brake pedal effort, the deactivator switch will open and
remove power to the speed control servo, releasing the throttle independent of the speed control
servo.
NOTE: The air bag sliding contract provides the electrical interface between the steering column wiring
and the speed control actuator switches in the steering wheel.
The inputs to the speed control servo are the:
zvehicle speed signal.
SECTION 310-
03: Speed Control 2003 Mustang Workshop Manual Special Tool(s)
Worldwide Diagnostic System
(WDS)
418-
F224,
New Generation STAR (NGS)
Tester
418- F052, or equivalent
diagnostic tool 73 Digital Multimeter or
equivalent
105-
R0051 Breakout Box, EEC-V Control
System 418-049, or equivalent
014- 00950 Klj . 1 ba
132003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_2308/S3B~us~en~ ...

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FORD MUSTANG 2003 Workshop Manual �z
speed control actuator switches.
�z brake pedal position (BPP) switch.
�z clutch pedal position (CPP) switch.
�z deactivator switch.
The output of the speed control servo is the:
�zspeed contr

Page 3013 of 4378

FORD MUSTANG 2003 Workshop Manual inoperative
box (CJB) fuse
17 (15A), 33
(15A).
�z Battery junction
box (BJB) fuse
HORN (20A).
�z Circuitry.
�z Deactivator
switch.
�z Clutch pedal
position (CPP)
switch.
�z Speed control

Page 3014 of 4378

FORD MUSTANG 2003 Workshop Manual Pinpoint Tests
PINPOINT TEST A: THE SPEED CONTROL IS INOPERATIVE
Test Step Result / Action to Take
A1 CHECK THE SPEED CONTROL SERVO VOLTAGE AND
GROUND �z
Key in OFF position.
�z Disconnect: Spe

Page 3015 of 4378

FORD MUSTANG 2003 Workshop Manual �z
Is the voltage greater than 10 volts? A4 CHECK CIRCUIT 10 (LG/RD) FOR AN OPEN
�z
Disconnect: Deactivator Switch C2210.
�z Measure the voltage between deactivator switch C2210 Pin 1,
Circuit 10

Page 3016 of 4378

FORD MUSTANG 2003 Workshop Manual �z
Is the voltage greater than 10 volts? A7 CHECK CIRCUIT 151 (LB/BK) FOR AN OPEN
�z
Disconnect: Air Bag Sliding Contact C218a.
�z Measure the resistance between speed control servo C122 Pin
5, Ci

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