ABS FORD MUSTANG 2003 Workshop Manual

REMOVAL AND INSTALLATION
Muffler —
3.8L
Removal and Installation 1. Raise and support the vehicle. For additional information, refer to Section 100 - 02 .
2. Support the rear axle with a suitable jack.
3. Remove the upper arm- to-differential bolt.
4. Remove the nut and bolt and disconnect the rear shock absorbers (18124) from the axle housing.
zDiscard the nut.
5. Lower the rear axle.
6. Remove the dual converter assembly flange nuts.
SECTION 309-
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REMOVAL AND INSTALLATION
Muffler —
4.6L (2V)
Removal and Installation 1. Use a jack to support and lower the rear axle.
2. Remove the upper arm- to-differential bolt.
3. Remove the nut and bolt, and disconnect the rear shock absorbers (18124) from the axle housing.
zDiscard the nut.
4. Lower the rear axle.
5. Remove the dual converter assembly nuts. (RH shown, LH similar.)
6. Remove the RH intermediate exhaust hanger insulator.
SECTION 309-
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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-
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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-
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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 —
3.8L
Removal and Installation 1. Disconnect the speed control cable from the throttle body and the bracket. For additional information, refer to Section 310 - 03 .
2. Disconnect the accelerator cable from the throttle body by rotating the throttle body full open and aligning the cable with the release slot.
3. Compress the accelerator cable locking tabs and disconnect the accelerator cable from the accelerator cable bracket.
4. Remove the bolts and the accelerator cable bracket.
5. To install, reverse the removal procedure.
SECTION 310-
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REMOVAL AND INSTALLATION
Accelerator Cable Bracket —
4.6L (2V)
Removal and Installation 1. Disconnect the speed control cable from the throttle body and the bracket. For additional information, refer to Section 310 - 03 .
2. Disconnect the accelerator cable from the throttle body by rotating the throttle body full open and aligning the cable with the release slot.
3. Compress the accelerator cable locking tabs and disconnect the accelerator cable from the accelerator cable bracket.
4. Remove the spring.
5. Remove the bolts and the accelerator cable bracket.
SECTION 310-
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22003 Mustang Workshop Manual
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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-
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z
Refrigerant R- 134a must not be mixed with air for leak testing or used with air for any
other purpose above atmospheric pressure. R- 134a is combustible when mixed with high
concentrations of air and higher pressures.
z A number of manufacturers are producing alternative refrigerant products that are
designed to be used instead of R- 134a refrigerant. The use of any unauthorized
substitute refrigerant can severely damage the A/C components. If repair is required, use
only new or recycled refrigerant R- 134a.
CAUTION: To avoid contamination of the A/C system, always observe the following:
z Keep service tools and the work area clean.
z Never open or loosen a connection before discharging the system.
z When loosening a connection, if any residual pressure is evident, allow it to leak out
before opening the fitting.
z Evacuate a system that has been opened to install a new component or one that has
been discharged through leakage before charging.
z Seal an open fitting with a cap or plug immediately after disconnecting a component
from the system.
z Clean the outside of the fittings thoroughly before disconnecting a component from the
system.
z Do not remove the sealing caps from a new component until ready to install.
z Refrigerant oil will absorb moisture from the atmosphere if left uncapped. Do not open
an oil container until ready to use, and install the cap immediately after using. Store the
oil in a clean, moisture- free container.
z Install a new O- ring seal before connecting an open fitting. Coat the fitting and the O- ring
seal with refrigerant oil before connecting.
z When installing a refrigerant line, avoid sharp bends. Position the line away from the
exhaust or any sharp edges that can chafe the line.
z Do not open a refrigerant system or uncap a new component unless it is as close as
possible to room temperature. This will prevent condensation from forming inside a
component that is cooler than the surrounding air.
The manual climate control system heats or cools the vehicle depending on the function selector
switch position and the temperature selected.
zThe function selector switch position determines heating or cooling and air distribution.
z The temperature control setting determines the air temperature.
z The heater blower motor switch (18578) varies the blower motor speed.
Principles of Operation
There are four main principles involved with the basic theory of operation:
zheat transfer
z latent heat of vaporization
z relative humidity
z effects of pressure Heat Transfer Klj . 2 ba
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If two substances of different temperature are placed near each other, the heat in the warmer
substance will transfer to the colder substance.
Latent Heat of Vaporization
When a liquid boils (converts to a gas), it absorbs heat without raising the temperature of the resulting
gas. When the gas condenses (reverts back to a liquid), it gives off heat without lowering the
temperature of the resulting liquid.
Relative Humidity
The amount of moisture (water vapor content) that the air can hold is directly related to the air
temperature. The more heat there is in the air, the more moisture the air can hold. The lower the
moisture content in the air, the more comfortable you feel. Removing moisture from the air lowers its
relative humidity and improves personal comfort.
Effects of Pressure on Boiling or Condensation
As the pressure is increased on a liquid, the temperature at which the liquid boils (converts to a gas)
also increases. Conversely, when the pressure on a liquid is reduced, its boiling point is also reduced.
When in the gas state, an increase in pressure causes an increase in temperature, while a decrease in
pressure will decrease the temperature of the gas.
Compressor Anti-
Slugging Strategy
Liquid refrigerant may accumulate in the A/C compressor under certain conditions. To alleviate
damage to the A/C compressor, compressor anti- slugging strategy (CASS) is utilized.
CASS is initiated only under specific conditions:
zthe ignition is off for more than 8 hours
z the ambient temperature is above -4º C (25ºF)
z battery voltage is above 8.5 volts during engine cranking
When these conditions are present, the powertrain control module (PCM) will activate the A/C control
relay prior to cranking of the engine. The A/C control relay engages the A/C compressor for
approximately 4- 15 A/C compressor revolutions or a maximum of 2 seconds (depending upon vehicle
application), allowing the liquid refrigerant to be pushed from the A/C compressor. CASS is initiated by
the PCM regardless of the function selector switch position or the EATC system settings.
The Refrigerant Cycle
During stabilized conditions (air conditioning system shut down), the refrigerant is in a vaporized state
and pressures are equal throughout the system. When the A/C compressor (19703) is in operation, it
increases pressure on the refrigerant vapor, raising its temperature. The high- pressure and high-
temperature vapor is then released into the top of the A/C condenser core (19712).
The A/C condenser core, being close to ambient temperature, causes the refrigerant vapor to
condense into a liquid when heat is removed from the refrigerant by ambient air passing over the fins
and tubing. The now liquid refrigerant, still at high pressure, exits from the bottom of the A/C
condenser core and enters the inlet side of the A/C evaporator core orifice (19D990).
The A/C evaporator core orifice is the restriction in the refrigerant system that creates the high
pressure buildup upstream of the A/C evaporator core (19860) and separates the high and low
pressure sides of the A/C system. As the liquid refrigerant leaves this restriction, its pressure and
boiling point are reduced.
The liquid refrigerant is now at its lowest pressure and temperature. As it passes through the A/C Klj . 3 ba
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