2003 FORD MUSTANG ECU

PINPOINT TEST L: CLUTCH VIBRATION appropriate workshop manual for the service procedures.
z Secure the brake drums (if so equipped), by installing wheel
hub bolt nuts, reversed.
z Carefully accelerate the drivetrain while checking for vibration.
z Is the vibration present? assemblies as necessary.
TEST the system for
normal operation.
Test Step Result / Action to Take
L1 CHECK ENGINE COMPONENTS FOR GROUNDING
z
NOTE: Make sure the clutch is the cause of the
vibration concern. The vibration should occur during
clutch operation. The clutch can also be difficult to
engage or disengage. Eliminate all related systems
before checking the clutch components.
z NOTE: Check the driveline angles and driveshaft
runout before disassembling the clutch system. Refer
to Section 205 - 00 for the correct driveline angle
specifications.
z Check the powertrain/drivetrain mounts, exhaust
manifolds or other engine components for grounding
on the chassis.
z Are any mounts or engine components
grounded? Yes
REPAIR as necessary. TEST the
system for normal operation.
No
GO to
L2 .
L2 CHECK THE ACCESSORY DRIVE
z
Remove the accessory drive belt.
z Does the vibration stop with the accessory drive
belt removed? Yes
DIAGNOSE the accessory drive
components.
No
GO to
L3 .
L3 CHECK FOR LOOSE CLUTCH PRESSURE PLATE
BOLTS z
Check for loose clutch pressure plate bolts. Inspect
the clutch pressure plate for damage or for material
between the pressure plate and flywheel.
z Are there any loose bolts or damage? Yes
TIGHTEN the bolts to
specifications or if damaged,
INSTALL a new clutch pressure
plate. REFER to
Section 308 - 01 .
TEST the system for normal
operation.
No
GO to L4 .
L4 CHECK THE CLUTCH DISC SPRINGS
z
Check for worn, broken or loose clutch disc springs.
z Are the clutch springs worn, broken or loose? Yes
INSTALL a new clutch disc.
REFER to
Section 308 - 01 . TEST
the system for normal operation.
No
GO to L5 .
L5 CHECK THE CLUTCH DISC SPLINES
z
Inspect the clutch disc splines for damage or wear.
z Is there damage or wear? Yes
INSTALL a new clutch disc.
REFER to
Section 308 - 01 . TEST Klj . 61 ba
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GENERAL PROCEDURES
Exhaust System Neutralizing
WARNING: Exhaust gases contain carbon monoxide, which is harmful to health and
potentially lethal. Repair exhaust system leaks immediately. Never operate the engine in an
enclosed area.
WARNING: Exhaust system components are hot.
NOTE: Neutralize the exhaust system to relieve strain on mounts which can be sufficiently bound up to
transmit vibration as if grounded.
1. WARNING: The electrical power to the air suspension system must be shut off prior
to hoisting, jacking or towing an air suspension vehicle. This can be accomplished by
turning off the air suspension switch. Failure to do so can result in unexpected inflation
or deflation of the air springs, which can result in shifting of the vehicle during these
operations.
CAUTION: Make sure the system is warmed up to normal operating temperature, as
thermal expansion can be the cause of a strain problem.
Raise and support the vehicle.
2. Loosen all exhaust hanger attachments and reposition the hangers until they hang free and straight.
3. Loosen all exhaust flange joints.
4. Place a stand to support the muffler parallel to the vehicle frame with the muffler pipe bracket free of stress.
5. Tighten the muffler connection.
6. Tighten all the exhaust hanger clamps and flanges (tighten the exhaust manifold flange joint last).
zVerify there is adequate clearance to prevent grounding at any point in the system. Make
sure that the catalytic converter and heat shield do not contact the frame rails.
z After neutralization, the rubber in the exhaust hangers should show some flexibility when
movement is applied to the exhaust system.
z With the exhaust system installed securely and cooled, the rear hanger should be angled
forward.
7. Lower the vehicle.
8. Test the exhaust system for normal operation.
SECTION 100-
04: Noise, Vibration and Harshness 2003 Mustang Workshop Manual Klj . 1 ba
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5.
NOTE: If necessary, use Rust Penetrant and Inhibitor F2AZ-19A501- A meeting Ford
specification ESR-M99C56- A to loosen the sensor for removal.
Remove the rear anti- lock brake sensors from the rear disc brake adapters. For additional
information, refer to Section 206 - 09A .
6. CAUTION: Index- mark the brake discs and the wheel studs prior to brake disc
removal.
CAUTION: Do not allow the calipers to hang from the brake hoses.
Remove the rear brake discs. For additional information, refer to Section 206 - 04 .
7. CAUTION: Secure the differential housing (4010) to the jack with a suitable strap.
Support the differential housing with a suitable hi- lift jack. Klj . 2 ba
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9. Remove the stabilizer bar. For additional information, refer to
Section 204 - 02 .
10. Position a suitable transmission jack under the differential housing (4010) for support and strap it securely in place.
11. Remove and discard the nuts and bolts retaining the upper suspension arm and bushings to the differential housing. Klj . 3 ba
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DESCRIPTION AND OPERATION
Rear Drive Halfshafts
The rear wheel drive halfshaft system consists of and operates as follows:
zHalfshafts (4K138) transmit engine torque from the rear axle housing to the rear wheels.
z Halfshafts rotate at approximately one- third the speed of a driveshaft and do not contribute to
rotational vibration disturbances.
z A constant velocity (CV) joint is a mechanism for transmitting uniform torque and rotary motion
while operating through a range of angles.
z CV joints at both inboard (differential) and outboard (wheel) ends provide operating
smoothness.
z The inboard CV joints are plunge- type joints that provide the axial movement necessary to
affect shaft length changes.
z The outboard CV joints have a higher angle capability than the inboard CV joints to
accommodate suspension travel.
z Inboard and outboard CV joints connect to a splined shaft.
z A driveshaft bearing retainer circlip retains the splined inboard CV joint to the differential side
gear. Install a new circlip every time you remove the halfshaft from the vehicle.
z A rear axle wheel hub retainer secures the interconnecting shaft and outboard CV joint to the
rear hub.
z The lubed-for- life CV joints use special CV joint grease. They require no periodic lubrication.
z To separate the halfshaft from the rear hub, press the outboard CV joint from the rear hub.
z To separate the halfshaft from the differential, apply a load to the back face of the inboard CV
joint assembly to overcome the circlip.
z The halfshaft assemblies are not repairable. Install a new assembly if worn/damaged.
SECTION 205-
05: Rear Drive Halfshafts 2003 Mustang Workshop Manual Klj . 1 ba
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in the brake master cylinder reservoir are also indicators of system concerns.
If a wheel is locked and the vehicle must be moved, open a bleeder screw at the locked wheel (1007)
to let out enough fluid to relieve the pressure. Close the bleeder screw. This bleeding operation may
release the brakes but will not correct the cause of trouble. If this does not relieve the locked wheel
condition, repair the locked components before proceeding.
Inspect all hoses and connections. All unused vacuum connectors should be capped. Make sure
hoses and their connections are correctly secured and in good condition with no holes, soft or
collapsed areas.
Non-
Pressure Leaks
The only part of the brake system that could have a brake fluid loss that does not appear when the
system is under pressure is the brake master cylinder reservoir area. Brake fluid loss can be caused
by a missing or poorly- fitted brake master cylinder filler cap (2162), a punctured or otherwise damaged
brake master cylinder reservoir, a missing or damaged brake master cylinder filler cap gasket, or by
missing, damaged or poorly- fitted sealing grommets between the brake master cylinder (2140) and the
brake master cylinder reservoir.
The brake master cylinder reservoir grommets are not separately serviceable and must be installed
new as part of a new brake master cylinder reservoir.
Install a new flexible brake hose if it shows signs of softening, cracking or other damage.
When installing a new brake hose, position the hose to avoid contact with other vehicle components.
Road Test
Perform a road test to compare actual vehicle braking performance with the performance standards
expected by the driver. The ability of the test driver to make valid comparisons and detect performance
deficiencies will depend on experience.
The driver should have a thorough knowledge of brake system operation and accepted general
performance guidelines in order to make good comparisons and detect performance problems.
Select a road that is reasonably smooth and level. Gravel or bumpy roads are not suitable because the
surface does not allow the tires to grip the road equally. Avoid crowned roads.
A key factor in evaluating brake concerns is the deceleration rate. This varies from vehicle to vehicle
and with changes in operating conditions. It is evident how well the brakes are working after just a few
applications.
Avoid locking the brakes. Locked brakes are not an indication of braking efficiency.
Visual Inspection Chart Mechanical Electrical
z
Brake master cylinder
z Brake caliper piston
z Brake discs
z Brake pads z
Parking brake switch
z Damaged or corroded wiring harness
z Brake master cylinder fluid level switch Klj . 2 ba
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REMOVAL AND INSTALLATION
Shield
Removal
1. Remove the brake disc (1125). For additional information, refer to Disc in this section.
2. Remove the brake disc shield (2K004). 1. Drill out three brake disc shield rivets.
2. Remove the brake disc shield.
Installation 1. Install the brake disc shield. 1. Position the shield.
2. Secure with three rivets.
2. Install the brake disc. For additional information, refer to Disc in this section.
SECTION 206-
03: Front Disc Brake 2003 Mustang Workshop Manual Klj . 1 ba
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DISASSEMBLY AND ASSEMBLY
Caliper
Disassembly
1. Remove the rear disc brake caliper (2552). For additional information, refer to Caliper in the Removal and Installation portion of this section.
2. Drain the brake fluid from the rear disc brake caliper.
3. Secure the rear disc brake caliper in a vise.
4. Turn the rear disc brake piston and adjuster (2B588) counterclockwise with Rear Caliper Piston Adjuster.
SECTION 206-
04: Rear Disc Brake 2003 Mustang Workshop Manual Special Tool(s)
Rear Caliper Piston Adjuster
206-
026 (T87P-2588- A) Rear Caliper Spring
Compressor Set
206-
S027 (T87P-2588- B) Klj . 1 ba
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