Climate Control System: Other Ford Mustang V рестайлинг 2

Air Conditioning

The A/C system components are

1. A/C compressor
2. A/C condenser core
3. A/C evaporator core
4. Receiver/drier
5. Connecting refrigerant lines
6. Thermostatic Expansion Valve (TXV)
7. A/C evaporator discharge air temperature sensor
8. A/C pressure transducer
9. A/C compressor pressure relief valve

The refrigerant system incorporates an A/C compressor controlled by the PCM through an A/C clutch relay.

An A/C compressor pressure relief valve is installed in the A/C compressor to protect the refrigerant system against excessively high refrigerant pressures.

Refrigerant flow into the evaporator core is metered by a TXV.

For information concerning the refrigerant cycle and principles of A/C operation, refer to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS .

Thermostatic Expansion Valve (TXV)

The TXV is located at the evaporator core inlet and outlet tubes at the center rear of the engine compartment. The TXV provides a restriction to the flow of refrigerant from the high-pressure side of the refrigerant system and separates the low-pressure and high-pressure sides of the refrigerant system. Refrigerant entering and exiting the evaporator core passes through the TXV through 2 separate flow paths. An internal temperature sensing bulb senses the temperature of the refrigerant flowing out of the evaporator core and adjusts an internal pin-type valve to meter the refrigerant flow into the evaporator core. The internal pin-type valve decreases the amount of refrigerant entering the evaporator core at lower temperatures and increases the amount of refrigerant entering the evaporator core at higher temperatures.

A/C Evaporator Discharge Air Temperature Sensor

The evaporator discharge air temperature sensor contains a thermistor. The resistance of this thermistor varies by a specific amount based on the evaporator discharge air temperature. The HVAC module measures a voltage ratio between the reference voltage it supplies to the sensor and the sensor voltage to determine this resistance and the associated discharge air temperature.

The evaporator discharge air temperature sensor maintains evaporator core temperature and prevents icing of the evaporator core. The temperature information from the sensor is used by the HVAC module to switch off the A/C request signal to the Instrument Cluster (IC) when the evaporator discharge air temperature falls below approximately 7°C (45°F). The A/C request will be switched back on when the evaporator discharge air temperature rises above acceptable levels.

The A/C evaporator discharge air temperature sensor is located on the heater core and evaporator core housing to the right of the accelerator pedal.

A/C Pressure Transducer

Note. It is not necessary to recover the refrigerant before removing the A/C pressure transducer.

The A/C pressure transducer monitors the compressor discharge pressure and sends a variable voltage signal representing the pressure to the PCM. The PCM will interrupt A/C compressor operation in the event that the A/C pressure transducer indicates high system discharge pressures. It is also used to sense low charge conditions. If the pressure is below a predetermined value for a given ambient temperature, the PCM will not allow the clutch to engage.

The A/C pressure transducer is located on the compressor-to-condenser discharge line near the condenser inlet fitting.

Condenser Core

The condenser is an aluminum fin and tube design heat exchanger, located in front of the vehicle radiator. It cools compressed refrigerant gas by allowing air to pass over fins and tubes to extract heat, and by condensing gas to liquid refrigerant as it is cooled.

Evaporator Core

Note. The evaporator core is not individually serviced. It is serviced only with the heater core and evaporator core housing.

The evaporator core is an aluminum plate/fin type and is located in the heater core and evaporator core housing. A mixture of liquid refrigerant and oil enters the bottom of the evaporator core through the evaporator core inlet tube and then moves out of the evaporator core through the evaporator core outlet tube as a vapor. Air from the blower motor is cooled and dehumidified as it flows through the evaporator core fins.

The evaporator core is located in the heater core and evaporator core housing.

Receiver/Drier

Note. Installation of a new receiver/drier is not required when repairing the A/C system, except when there is physical evidence of contamination from a failed A/C compressor or damage to the receiver/drier. Damage to the receiver/drier includes leaks, physical damage to the receiver/drier shell or desiccant, or moisture contamination. Moisture contamination results only from a complete loss of refrigerant, and equalization of the refrigerant system pressure with atmospheric pressure for a period longer than one hour. If even a slight amount of positive refrigerant pressure is present in the refrigerant system before repairs are carried out, a new receiver/drier should not be installed.

The receiver/drier is mounted to the LH front of the condenser core. It stores high-pressure liquid after it leaves the condenser core. A desiccant cartridge mounted inside the receiver/drier removes moisture from the refrigerant.

A/C Compressor Pressure Relief Valve

Note. If the A/C compressor is operating within limits and the A/C pressure relief valve is venting, or if the A/C pressure relief valve is leaking around the threads, install a new A/C pressure relief valve and O-ring. If the A/C pressure relief valve still vents after it is replaced, diagnose the refrigerant system for a restriction.

An A/C pressure relief valve is incorporated in the A/C compressor, as a redundant backup to the A/C pressure transducer, to prevent damage to the A/C compressor and other system components by relieving unusually high system discharge pressure buildups. Under normal conditions the A/C pressure relief valve will never vent. Only a failure of the A/C pressure relief valve, A/C pressure transducer or A/C clutch control system, overheating of the refrigerant system, or a restriction in the refrigerant system between the A/C compressor and A/C pressure transducer will cause the A/C pressure relief valve to vent.

The A/C pressure relief valve is a separate component and can be replaced separately from the A/C compressor. It is necessary to recover the refrigerant before removing the A/C pressure relief valve.

Service Gauge Port Valves

The high-pressure service gauge port valve is located on the condenser-to-evaporator line.

The low-pressure service gauge port valve is located on the A/C compressor suction line.

Scheme 165

The fitting is an integral part of the refrigerant system line or component.

1. Special couplings are required for both the high-side and low-side service gauge ports.
2. A very small amount of leakage will always be detectable around the Schrader-type valve with the service gauge port valve cap removed, and is considered normal. A new Schrader-type valve core can be installed if the seal leaks excessively.
3. The service gauge port valve caps are used as primary seals in the refrigerant system to prevent leakage through the Schrader-type valves from reaching the atmosphere. Always install and tighten the A/C service gauge port valve caps to the correct torque after they are removed.

Refrigerant System Dye

Fluorescent refrigerant system dye is added to the refrigerant system at the factory to assist in refrigerant system leak diagnosis using a Rotunda-approved ultraviolet blacklight. It is not necessary to add additional dye to the refrigerant system before diagnosing leaks, even if a significant amount of refrigerant has been removed from the system. New receiver/driers are shipped with a fluorescent dye "wafer" included in the desiccant bag which will dissolve after approximately 30 minutes of continued A/C operation. It is not necessary to add dye after flushing or filtering the refrigerant system because a new receiver/drier is installed as part of the flushing or filtering procedure. Additional refrigerant system dye should only be added if more than 50% of the refrigerant system lubricant capacity has been lost due to a fitting separation, hose rupture or other damage. Refer to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS .

Air Distribution and Filtering

Note. The air distribution system of this vehicle is factory equipped with a cabin air filter.

There are 2 sources of air available to the air distribution system

1. Outside air
2. Recirculated air

Recirculated air is automatically used when the HVAC module is set to the MAX A/C and OFF modes, and can be selected in any mode except DEFROST or FLOOR/DEFROST.

Air distribution within the vehicle is determined by the function selector switch position. Airflow mode doors are used to direct airflow within the plenum chamber. Electric mode door actuators are used to position the airflow mode doors. Refer to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS for a description and operation of each mode.

Air enters the passenger compartment from the

1. instrument panel registers.
2. floor ducts.
3. windshield defroster duct.
4. side window demisters.

Passenger compartment air is exhausted from the vehicle through open windows or body air vents.

Cabin Air Filter

The cabin air filter is located under the RH cowl vent screen. For cabin air filter maintenance intervals, refer to MAINTENANCE SCHEDULE .

Plenum Chamber

The plenum chamber is used to distribute airflow from the heater core and evaporator core housing to the airflow outlets. It is mounted to the instrument panel and can be replaced separately from the heater core and evaporator core housing. The plenum chamber contains the PANEL and DEFROST mode doors which cannot be separately replaced.

Air Inlet Duct

The air inlet duct is used to switch between FRESH and RECIRCULATED air inlet. It is mounted to the heater core and evaporator core housing and cannot be replaced separately. The air inlet duct contains the air inlet mode door which cannot be separately replaced.

Control Components

The Electronic Manual Temperature Control (EMTC) system control components are used to select

1. air inlet source (outside or recirculated).
2. blower motor speed.
3. discharge air temperature (temperature blend).
4. discharge air location (defrost, panel, floor).
5. A/C compressor operation.

HVAC Module

The EMTC system uses a remote HVAC module that is separate from the control interface. The Front Controls Interface Module (FCIM) provides the interface for the vehicle occupants to control the climate control system. When selections are made, the FCIM communicates the selections to the HVAC module over the Medium Speed Controller Area Network (MS-CAN). The remote HVAC module controls the climate control system based on the FCIM selections.

The HVAC module is mounted to the instrument panel support behind the FCIM.

Blower Motor Speed

The blower motor speed control controls the blower motor speed by converting low power signals from the HVAC module to a high-current, variable ground feed for the blower motor. The HVAC module adjusts blower motor speed based on the blower speed selector position. A delay function is used to provide a gradual increase or decrease in blower motor speed under all conditions.

The blower motor speed control is located on the heater core and evaporator core housing near the blower motor.

Airflow Mode Door Position

The climate control system uses 2 electric airflow mode door actuators to control the airflow mode doors.

The panel/defrost airflow mode door actuator uses a cam and lever assembly to position the panel and defrost airflow mode doors on command from the HVAC module. The panel/defrost mode door actuator contains a reversible electric motor and potentiometer. The potentiometer allows the HVAC module to monitor the position of the panel and defrost airflow mode doors. The potentiometer circuit consists of a 5-volt reference signal connected to one end of a variable resistor, and a signal ground connected to the other. A signal circuit is connected to a contact wiper, which is driven along the variable resistor by the actuator shaft. The signal to the HVAC module from the contact wiper indicates the position of the airflow mode doors. The HVAC module powers the actuator motor to move the airflow mode doors to the desired position. The desired position is set by the vehicle occupants using the mode selector buttons.

The floor airflow mode door actuator positions the floor mode door on command from the HVAC module. The floor mode door actuator is driven to, and will automatically stop at, the full open or full closed position and does not require a feedback circuit to report its position to the HVAC module. The desired position is set by the vehicle occupants using the mode selector buttons.

Air Inlet Mode Door Position

The air inlet mode door actuator moves the air inlet door between the fresh and RECIRC positions on command from the HVAC module. The air inlet mode door actuator is driven to, and will automatically stop at, the full RECIRC or full fresh air inlet position and does not require a potentiometer circuit to monitor its position. The air inlet mode door does not stop at any point between the RECIRC or fresh air inlet position.

Temperature Blend Door Position

The temperature blend door actuator moves the temperature blend door on command from the HVAC module.

The temperature blend door actuator contains a reversible electric motor and a potentiometer. The potentiometer circuit consists of a 5-volt reference signal connected to one end of a variable resistor, and a signal ground connected to the other. A signal circuit is connected to a contact wiper, which is driven along the variable resistor by the actuator shaft. The signal to the HVAC module from the contact wiper indicates the position of the temperature blend door. The HVAC module powers the actuator motor to move the temperature blend door to the desired position. The desired position is set by the vehicle occupants using the temperature selector knob.

The temperature blend door actuator is located on the heater core and evaporator core housing to the left of the glove compartment.

Electronic Automatic Temperature Control (EATC)

The HVAC module analyzes input from the following major sources

1. Temperature, airflow direction, blower, A/C and RECIRC selection (made by the vehicle occupants)
2. In-vehicle temperature sensor
3. Ambient air temperature sensor
4. Solar radiation sensor (sunload sensor)
5. Vehicle speed
6. Engine coolant temperature

Using these inputs, the HVAC module determines the correct conditions for the following outputs

1. A/C compressor operation
2. Blower motor speed
3. RH and LH temperature blend door positions
4. Defrost/panel/floor airflow mode door positions
5. Air inlet mode door position

Control System Inputs

The Electronic Automatic Temperature Control (EATC) system has 4 control system inputs.

The EATC system uses a remote HVAC module that is separate from the control interface. The Front Controls Interface Module (FCIM) provides the interface for the vehicle occupants to control the climate control system. When selections are made, the FCIM communicates the selections to the HVAC module over the Medium Speed Controller Area Network (MS-CAN). The remote HVAC module controls the climate control system based on the FCIM selections or will automatically control the climate control system in the AUTO mode.

The HVAC module is mounted to the instrument panel support behind the FCIM.

In-Vehicle Temperature Sensor

The in-vehicle temperature sensor contains a thermistor, which measures the in-vehicle air temperature and sends that reading to the HVAC module. The in-vehicle temperature sensor uses an internal fan to draw in-vehicle air through the in-vehicle temperature sensor (across the thermistor).

The in-vehicle temperature sensor is mounted to the center instrument panel finish panel below the FCIM.

Solar Radiation Sensor (Sunload Sensor)

The solar radiation sensor supplies information to the dual-zone HVAC module indicating sunload. When sunload is detected, the information from the sensor is used to lower the A/C temperature output to compensate for radiant heat warming the vehicle interior and occupants.

The sunload sensor is located on the center of the instrument panel at the base of the windshield.

Ambient Temperature Sensor

The ambient temperature sensor signal is received by the dual-zone HVAC module and indicates the outside air temperature. The ambient temperature sensor is located in front of the radiator on the radiator support.

The blower motor speed control controls the blower motor speed by converting low power signals from the HVAC module to a high-current, variable ground feed for the blower motor. The HVAC module adjusts blower motor speed based on the difference between the in-vehicle temperature sensor signal and set temperature. A delay function is used to provide a gradual increase or decrease in blower motor speed under all conditions.

The blower motor speed control is located on the heater core and evaporator core housing near the blower motor.

The climate control system uses 2 electric airflow mode door actuators to control the airflow mode doors.

The panel/defrost airflow mode door actuator uses a cam and lever assembly to position the panel and defrost airflow mode doors on command from the HVAC module. The panel/defrost mode door actuator contains a reversible electric motor and potentiometer. The potentiometer allows the HVAC module to monitor the position of the panel and defrost airflow mode doors. The potentiometer circuit consists of a 5-volt reference signal connected to one end of a variable resistor, and a signal ground connected to the other. A signal circuit is connected to a contact wiper, which is driven along the variable resistor by the actuator shaft. The signal to the HVAC module from the contact wiper indicates the position of the airflow mode doors. The HVAC module powers the actuator motor to move the airflow mode doors to the desired position. The desired position is set by the vehicle occupants using the mode selector buttons.

The floor airflow mode door actuator positions the floor mode door on command from the HVAC module. The floor mode door actuator is driven to, and will automatically stop at, the full open or full closed position and does not require a feedback circuit to report its position to the HVAC module. The desired position is set by the vehicle occupants using the mode selector buttons.

Under certain conditions, the panel/defrost and floor airflow mode doors may move at the same time to prevent pressurizing.

The air inlet mode door actuator moves the air inlet door between the fresh and RECIRC positions on command from the HVAC module. The air inlet mode door actuator is driven to, and will automatically stop at, the full RECIRC or full fresh air inlet position and does not require a potentiometer circuit to monitor its position. The air inlet mode door does not stop at any point between the RECIRC or fresh air inlet position.

Temperature Blend Door Positions

The dual-zone EATC system uses 2 temperature blend door actuators to control 2 separate temperature blend doors. The temperature blend doors independently vary the LH side and RH side temperature settings, as desired. The temperature blend door actuators each contain a reversible electric motor and a potentiometer. The potentiometer circuit consists of a 5-volt reference signal connected to one end of a variable resistor, and a signal ground connected to the other. A signal circuit is connected to a contact wiper, which is driven along the variable resistor by the actuator shaft. The signal to the HVAC module from the contact wiper indicates the position of the temperature blend door. The HVAC module powers the actuator motors to move the temperature blend doors to the desired positions. The desired temperature blend door positions are calculated by the HVAC module based on the set temperature, in-vehicle temperature, ambient temperature and sunload.

The LH temperature blend door actuator is located on the heater core and evaporator core housing near the accelerator pedal. The RH temperature blend door actuator is located on the heater core and evaporator core housing to the left of the glove compartment.

Heating and Ventilation

The heating and ventilation system has the following features

1. Controls the temperature and, during A/C operation, reduces the relative humidity of the air inside the vehicle
2. Delivers heated or cooled air to maintain the vehicle interior temperature and comfort level
3. Cooling or heating can be adjusted to maintain the desired temperature

The heating and ventilation system includes the

1. Blower motor
2. Heater core and evaporator core housing
3. Heater core

Blower Motor

The blower motor draws air from the air inlet and forces it into the heater core and evaporator core housing where it is mixed and distributed. The blower motor receives battery voltage when the ignition is in the RUN position with the HVAC module in an ON position, and is grounded by the blower motor speed control.

Heater Core and Evaporator Core Housing

The heater core and evaporator core housing directs airflow from the blower motor through the evaporator core and heater core. All airflow from the blower motor passes through the evaporator core. The airflow is then directed through or around the heater core by the temperature blend door(s). After passing through the heater core, the airflow is distributed to the selected outlet by the plenum chamber.

Heater Core

Note. The heater core is not individually serviced. It is serviced only with the heater core and evaporator core housing.

The heater core receives a flow of coolant from the engine cooling system through the heater core inlet. A restrictor is installed in the heater core inlet hose on V8 models to eliminate noise. The heater core consists of fins and tubes arranged to extract heat from the engine coolant and transfer it to air passing through the heater core. The engine coolant is then returned to the engine cooling system through the heater core outlet.

Scheme 166

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Scheme 173

1. Refer to the procedures and/or exploded views for any Warnings, Notices, Notes, Materials, Specifications, and Special Tools. Items in the exploded views may not be listed in order of removal.

Air Conditioning (A/C) Compressor - 3.7L

MATERIAL SPECIFICATIONS

Air Conditioning (A/C) Compressor - 5.0L and 5.8L

MATERIAL SPECIFICATIONS

Air Conditioning (A/C) Pressure Relief Valve

MATERIAL SPECIFICATIONS

Scheme 174

1. Recover the refrigerant. For additional information, refer to «CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS»(ref-574127) .
2. Remove the A/C compressor pressure relief valve and O-ring seal. To install, tighten to 10 Nm (89 lb-in).
3. NOTE: A new O-ring seal will already be installed on the new A/C pressure relief valve service part. To install, reverse the removal procedure. Add the correct amount of clean PAG oil to the refrigerant system. For additional information, refer to the «REFRIGERANT OIL ADDING»(ref-574127-S22835045972013082300000) .
4. Evacuate, leak test and charge the refrigerant system. For additional information, refer to «CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS»(ref-574127) .

Scheme 175

Clutch and Clutch Field Coil

SPECIAL TOOLS Tool, A/C Clutch Holding 412-150 Protector, A/C Compressor Shaft 412-137 Remover, A/C Compressor Field Coil 412-067 (T89P-19623-FH) Remover, Compressor Pulley 412-001 (T71P-19703-B)

Scheme 176

Scheme 177

Scheme 178

Scheme 179

Scheme 180

1. Remove the A/C compressor. For additional information, refer to «AIR CONDITIONING (A/C) COMPRESSOR - 3.7L»(ref-574188-S04194027492013082300000) or «AIR CONDITIONING (A/C) COMPRESSOR - 5.0L AND 5.8L»(ref-574188-S03555770622013082300000) .
2. Remove the A/C clutch disc and hub bolt. Using the A/C Clutch Holding Tool, hold the A/C clutch disc and hub. Remove the A/C clutch disc and hub bolt.
3. Remove the A/C clutch disc and hub.
4. Remove the A/C clutch disc and hub spacer(s).
5. Remove the A/C compressor pulley snap ring.
6. NOTE: Do not use air tools. Damage to the Air Conditioning (A/C) clutch field coil or A/C compressor may result. Remove the A/C compressor pulley. Install the A/C compressor shaft protector. Install a suitable 3-jaw puller on the A/C compressor shaft protector and A/C compressor pulley. Remove the A/C compressor pulley.
7. Remove the 3 A/C clutch field coil screws.
8. Detach the A/C clutch field coil electrical connector pin-type retainer and remove the A/C clutch field coil.

Compressor to Condenser Discharge Line

MATERIAL SPECIFICATIONS

MATERIAL SPECIFICATIONS

Scheme 181

Scheme 182

Condenser to Evaporator Line

MATERIAL SPECIFICATIONS

Evaporator Outlet Line

MATERIAL SPECIFICATIONS

MATERIAL SPECIFICATIONS

Scheme 183

Scheme 184

Receiver Drier

MATERIAL SPECIFICATIONS

Scheme 185

Thermostatic Expansion Valve

MATERIAL SPECIFICATIONS

All vehicles

1. Recover the refrigerant. For additional information, refer to «CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS»(ref-574127) .
2. If equipped, remove the 4 nuts and the strut tower cross brace. 5.0L (4V) vehicles
3. Remove the engine appearance cover. 5.8L (4V) vehicles
4. Drain the engine coolant. For additional information, refer to «SUPERCHARGER COOLING»(ref-574175) .
5. Disconnect the heater hose fittings at the rear of the RH cylinder head and position the heater hoses aside.
6. Remove the Exhaust Gas Recirculation (EGR) system module tube. For additional information, refer to «ENGINE EMISSION CONTROL»(ref-574176) . All vehicles
7. Remove the Thermostatic Expansion Valve (TXV) fitting nut and disconnect the fitting. Discard the gasket seals. To install, tighten to 15 Nm (133 lb-in).
8. Remove the 2 TXV bolts. To install, tighten to 7 Nm (62 lb-in).
9. Remove the TXV. Discard the gasket seals.
10. To install, reverse the removal procedure. Install new gasket seals. Add the correct amount of clean PAG oil to the refrigerant system. For additional information, refer to the «REFRIGERANT OIL ADDING»(ref-574127-S22835045972013082300000) .
11. Evacuate, leak test and charge the refrigerant system. For additional information, refer to «CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS»(ref-574127) .