engine FORD MUSTANG 2003 Workshop Manual

DESCRIPTION AND OPERATION
Acceleration Control
Component Locations
The throttle is controlled by the accelerator cable which is connected to the accelerator pedal and
shaft.
zThe accelerator pedal and shaft should travel smoothly from the idle to the wide- open throttle
(WOT) positions. Hesitation on return or prevention of return to the idle position must not occur.
z Surrounding components such as wiring, hoses, sound insulator and floor covering must not
contact the sliding inner member of the accelerator cable or the accelerator pedal and shaft.
z The sliding inner member of the accelerator cable should not be lubricated and is not
serviceable.
SECTION 310-
02: Acceleration Control 2003 Mustang Workshop Manual Item Part Number Description
1 9725 Accelerator pedal and shaft
2 9A758 Accelerator cable
3 9728 Accelerator cable bracket, 3.8L
4 9728 Accelerator cable bracket, 4.6L (2V)
5 — Accelerator cable bracket, Supercharged engine Klj . 1 ba
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DIAGNOSIS AND TESTING
Acceleration Control
Inspection and Verification
1. Verify the customer's concern by operating the acceleration control system to duplicate the condition.
2. Inspect to determine if any of the following mechanical concerns apply:
3. If the inspection reveals an obvious concern that can be readily identified, repair as required.
4. If the concern remains after the inspection, determine the symptom(s) and GO to Symptom Chart .
Symptom Chart SECTION 310-
02: Acceleration Control 2003 Mustang Workshop Manual Visual Inspection Chart
Mechanical
z
damaged accelerator pedal and shaft
z damaged linkage
z damaged accelerator cable
z high engine idle speed
z damaged throttle body
Symptom Chart Condition
Possible Sources Action
z Excessive effort
needed to
depress
accelerator pedal
and shaft z
Worn
accelerator lever
pivot bushing. z
INSTALL a new accelerator
pedal and shaft.
z Accelerator
cable binding. z
INSTALL a new accelerator
cable.
z Worn or
damaged
throttle body. z
INSTALL a new throttle body.
REFER to Section 303 - 04A or
Section 303 - 04B .
z Accelerator pedal
and shaft feels
rough or raspy z
Frayed or
binding
accelerator
cable. z
INSTALL a new accelerator
cable.
z Worn or
damaged
throttle body. z
INSTALL a new throttle body.
REFER to Section 303 - 04A or
Section 303 - 04B .
z Accelerator pedal
and shaft binds or
sticks z
Kinked
accelerator
cable. z
INSTALL a new accelerator
cable. Klj . 1 ba
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z
Foreign object
caught in
accelerator
pedal linkage. z
CHECK the accelerator pedal
linkage.
z Worn or
damaged
throttle body. z
INSTALL a new throttle body.
REFER to Section 303 - 04A or
Section 303 - 04B .
z High engine idle
speed z
Kinked
accelerator
cable. z
INSTALL a new accelerator
cable.
z Foreign object
caught in
accelerator
pedal linkage. z
CHECK the accelerator pedal
linkage.
z Incorrect engine
idle speed. z
REFER to the Powertrain
Control/Emissions Diagnosis
(PC/ED) manual for diagnosis
and testing of the idle control
system. Klj . 2 ba
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REMOVAL AND INSTALLATION
Accelerator Cable —
3.8L
Removal and Installation 1. Push the accelerator cable nylon bushing out of the accelerator pedal and shaft arm.
2. Remove the bolts retaining the accelerator cable to the dash panel.
3. Disconnect the accelerator cable from the throttle body by rotating the throttle body full open and aligning the cable with the release slot.
4. Disconnect the accelerator cable from the retaining bracket by compressing the locking tabs and back- feeding the cable through the bracket and out of the engine compartment.
5. To install, reverse the removal procedure.
SECTION 310-
02: Acceleration Control 2003 Mustang Workshop Manual Klj . 1 ba
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REMOVAL AND INSTALLATION
Accelerator Cable —
4.6L (2V)
Removal and Installation 1. Push the accelerator cable nylon bushing out of the accelerator pedal and shaft arm.
2. Remove the bolts retaining the accelerator cable to the dash panel.
3. Disconnect the accelerator cable from the throttle body by rotating the throttle body full open and aligning the cable with the release slot.
4. Disconnect the accelerator cable from the retaining bracket by compressing the locking tabs and back- feeding the cable through the bracket and out of the engine compartment.
SECTION 310-
02: Acceleration Control 2003 Mustang Workshop Manual Klj . 1 ba
22003 Mustang Workshop Manual
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REMOVAL AND INSTALLATION
Accelerator Cable —
Supercharged Engine
Removal and Installation 1. Push the accelerator cable nylon bushing out of the accelerator pedal and shaft arm.
2. Disconnect the accelerator cable from the throttle cam.
3. Depress the tabs and disconnect the accelerator cable from the bracket. 4. Release the clip and position the accelerator cable aside. SECTION 310-
02: Acceleration Control 2003 Mustang Workshop Manual Klj . 1 ba
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REMOVAL AND INSTALLATION
Accelerator Cable Bracket —
Supercharged Engine
Removal and Installation 1. Disconnect the accelerator cable and speed control cable.
2. Depress the tabs and disconnect the accelerator cable and speed control cable from the accelerator cable bracket
3. Remove the bolts and the accelerator cable bracket.
4. To install, reverse the removal procedure.
SECTION 310-
02: Acceleration Control 2003 Mustang Workshop Manual Klj . 1 ba
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SPECIFICATIONS
SECTION 310-
02: Acceleration Control 2003 Mustang Workshop Manual Torque Specifications
Description Nm lb-
ft lb-
in Accelerator pedal and shaft nuts 18 13 —
Accelerator cable bracket (Supercharged engine) 10 — 89
Accelerator cable bolts (Supercharged engine) 4 — 35 Klj . 1 ba
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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 control actuator cable controlling the throttle position.
Inspection and Verification
NOTE: If any concerns are noted with the speedometer, stoplamps, or horn, address those concerns
by referring to their associated 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.
3. If the fault is not visually evident, verify the symptom and GO to the Symptom chart.
Symptom Chart
NOTE: New speed control diagnostic software is available in Version 12 or higher for the diagnostic
tool. When using this software, it is necessary to use Next Generation Speed Control Adapter 007-
00586 with the diagnostic tool.
NOTE: Refer to the Wiring Diagrams for connector numbers stated in the Pinpoint Test.
Visual Inspection Chart Mechanical Electrical
z
Deactivator switch
z Speed control actuator cable not attached to throttle
z Speed control actuator cable not fully seated to the
engine bracket z
Central junction box (CJB)
Fuse:
„15 (15A)
„ 33 (15A)
„ 35 (15A)
z Battery junction box (BJB)
fuse:
„HORN (20A)
z Wiring harness
z Loose or corroded
connections
z Speed control actuator
switches
Symptom Chart Condition
Possible Sources Action
z The speed control is zCentral junction zGo To Pinpoint Test A . Klj . 2 ba
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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
actuator switch.
z Speed control
servo.
z Powertrain
control module
(PCM).
z The set speed
fluctuates z
Circuitry.
z Speed control
servo.
z Powertrain
control module
(PCM). z
Go To Pinpoint Test B .
z Engine. zREFER to the Powertrain
Control/Emissions
Diagnosis (PC/ED)
manual.
z The speed control
does not disengage
when the brakes are
applied z
Central junction
box (CJB) fuse
33 (15A).
z Circuitry.
z Brake pedal
position (BPP)
switch.
z Speed control
servo. z
Go To Pinpoint Test C .
z The speed control
does not disengage
when the clutch is
applied z
Cluch pedal
position (CPP)
switch.
z Speed control
servo. z
Go To Pinpoint Test D .
z The speed control
switch is
inoperative— COAST z
Speed control
actuator switch.
z Speed control
servo. z
Go To Pinpoint Test E .
z The speed control
switch is
inoperative—
SET/ACCEL z
Speed control
actuator switch.
z Speed control
servo. z
Go To Pinpoint Test F .
z The speed control
switch is
inoperative—
RESUME z
Speed control
actuator switch.
z Speed control
servo. z
Go To Pinpoint Test G .
z The speed control
switch is
inoperative— OFF z
Speed control
actuator switch.
z Speed control
servo. z
Go To Pinpoint Test H . Klj . 3 ba
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