Climate Control System-General Information: Other Jaguar S-type I

Air Conditioning (A/C) Compressor Leak Detection

1. Remove the A/C compressor from the vehicle. For additional information, refer to «AIR CONDITIONING (A/C) COMPRESSOR»(ref-199554-S13273858272005101900000) .
2. Install A/C pressure test adaptor to the A/C compressor using the existing manifold bolt.
3. Connect the high and low pressure lines of R-134a manifold gauge set to the fittings on A/C pressure test adaptor.
4. Attach the center hose of R-134a manifold gauge set to a refrigerant container standing in an upright position.
5. Hand rotate the compressor shaft ten revolutions to distribute the oil inside the A/C compressor.
6. Open the low and high pressure gauge valves and the valve on the refrigerant container to allow the refrigerant vapor to flow into the A/C compressor.
7. Use R-134a automatic calibration halogen leak detector to check for leaks at the compressor shaft seal and the compressor center seal.
8. If a shaft seal leak is found, install a new shaft seal. If a leak is found at the compressor center seal, install a new A/C compressor.
9. When the leak test is finished, close the manifold gauge valves and the valve on the refrigerant container.
10. Slowly remove the gauge set hoses from A/C pressure test adapter. Allow the refrigerant in the compressor to escape.
11. Install the A/C compressor on the vehicles. For additional information, refer to «AIR CONDITIONING (A/C) COMPRESSOR»(ref-199554-S13273858272005101900000) .
12. Evacuate, charge and leak test the system.

Air Conditioning (A/C) System Recovery, Evacuation and Charging

1. Connect the charging station. For additional information, refer to the manufacturers equipment instructions.
2. Recover the refrigerant. For additional information, refer to the manufacturers equipment instructions.
3. Carry out the required repair procedure. For addition information, refer to «AIR CONDITIONING»(ref-199554) .
4. Add the required amount of oil to the A/C system depending on the repair procedure.
5. Evacuate the A/C system. For additional information, refer to the manufacturers equipment instructions.
6. Check the A/C system for a sufficient vacuum. For additional information, refer to the manufacturers equipment instructions.
7. Charge the A/C system with 800 grams of refrigerant.
8. Check the A/C system for correct operation.
9. Carry out fluorescent dye leak detection test.

Contaminated Refrigerant Handling

1. If contaminated refrigerant is detected DO NOT recover the refrigerant into your R-134a OR R-12 recovery/recycling equipment. Take the follow actions: Repeat the test to verify contaminated refrigerant is present. Advise the customer of the contaminated A/C system and any additional cost to repair the system. The customer may wish to return to the repair facility performing the last A/C repair. Recover the contaminated refrigerant using suitable recovery only equipment designed for capturing and storing contaminated refrigerant. This equipment must only be used to recover contaminated refrigerant to prevent the spread to other vehicles. As an alternative, contact an A/C repair facility in your area with the proper equipment to perform the repair. On completion of the recovery of the contaminated refrigerant, it will be necessary to carry out the A/C system flushing procedure.

Discharging and Recovery

1. Connect R-134a A/C refrigerant center hose(s) to the vehicle gauge ports and R-134a A/C refrigerant center inlet fittings.
2. Turn on the power to R-134a A/C refrigerant center to start the recovery process. Allow R-134a A/C refrigerant center to recover refrigerant from the system until the station pressure goes into a vacuum. On some equipment, the pump will be shut off automatically by a low-pressure switch in the electrical system. On other units, it may be necessary to manually turn off the pump.
3. Once R-134a A/C refrigerant center has recovered the vehicle A/C system refrigerant, close R-134a A/C refrigerant center inlet valve (if equipped). Then switch off the power supply.
4. Allow the vehicle A/C system to remain closed for about two minutes. Observe the system vacuum level as shown on the gauge. If the pressure does not rise, disconnect R-134a A/C refrigerant center hose(s).
5. If the system pressure rises, repeat Steps 2 - 4 until the vacuum level remains stable for two minutes.
6. Carry out the required operations, then evacuate and recharge the A/C system. For additional information, refer to «AIR CONDITIONING (A/C) SYSTEM RECOVERY, EVACUATION AND CHARGING»(ref-199551-S27055283222005101900000) .

Electronic Leak Detection

1. Attach R-134a manifold gauge set to the service gauge port valves. Leave both R-134a manifold gauge set valves closed. Both gauges should indicate 413-551 kPa (60-80 psi) at24°C (75°F) with the engine off. If little or no pressure is indicated, charge the refrigerant system. For additional information, refer to.
2. Use R134-a Automatic calibration halogen leak detector to leak test the refrigerant system. Follow the instructions included with leak detector for handling and operation techniques.
3. If a leak is found, reclaim the refrigerant. For additional information, refer to.

Fluorescent Dye Leak Detection

1. Check for leaks using 120 Watt UV Spot Lamp.
2. Scan all components, fittings and lines of the A/C system.
3. After the leak is repaired, remove any traces of leak dye with a general purpose oil solvent.
4. Verify the repair by operating the system for a short time and inspecting with the UV lamp.

Manifold Gauge Set Connection

1. Turn both valves on R-134a manifold gauge set all the way to the left to close the low-pressure and high-pressure hoses to the center manifold and center hose.
2. Remove the A/C charging valve caps from the low and high-pressure gauge port valves.
3. Connect R-134a manifold gauge set low-pressure hose and R-134a low side quick disconnect to the low-pressure gauge port valve.
4. Connect R-134a manifold gauge set high-pressure hose and R-134a high side quick disconnect to the high-pressure gauge port valve.
5. Connect the center hose to the vacuum pump or the R-134a tank.

Refrigerant Oil Adding

1. A new replacement A/C compressor contains no refrigerant oil. If the amount of oil drained from the removed A/C compressor is between 90 and 150 ml (3 to 5 oz.), pour the same amount plus 30 ml (1 oz.) of clean oil into the new A/C compressor. If the amount of oil drained from the old A/C compressor is greater than 150 ml (5 oz.), pour only 150 ml (5 oz.) of clean refrigerant oil into the new A/C compressor. If the amount of refrigerant oil drained from the old A/C compressor is less than 90 ml (3 oz.), pour 90 ml (3 oz.) of clean refrigerant oil into the new compressor. When replacing components of the air conditioning refrigerant system, add oil to the replacement components.

Refrigerant System Tests

1. Use R-134a A/C Refrigerant Center to evacuate and recover the A/C system. Follow the equipment manufactures procedures and instructions for use of equipment.

The purpose of the air distribution system is to route air to the designated registers. This is accomplished when air enters the plenum through the fresh/recirculated air inlet and is routed to the desired outlets by the use of air distribution doors.

The air distribution system contains the heater core, A/C evaporator core, blower motor, and all of the distribution doors. All of the air is mixed and distributed inside of the plenum assembly, depending on the distribution door positions.

For additional information on the air distribution and filtering system, refer to AIR DISTRIBUTION & FILTERING .

Heating/Defrosting

The heater system is a blended air system, receiving outside air through the air inlet, which is connected to the upper cowl. Air is directed through and/or around the heater core and mixed and discharged through outlets in the plenum assembly to the floor, panel or defrost nozzles, as desired.

For additional information on heating and defrosting, refer to HEATING & VENTILATION .

Heater Core

The heater core consists of a number of fins and tubes in an arrangement to extract heat from the engine coolant and transfer that heat to the air that passes through the heater core.

Blower motor

The blower motor pulls air from the air inlet and forces it into the plenum assembly where it is mixed and distributed. The blower motor has seven speeds and is controlled by the blower motor switch and resistor.

Air Conditioning

The R-134a air conditioning system uses a hydrofluorocarbon (HFC) non-CFC based refrigerant, R-134a requires the use of Jaguar refrigerant oil or equivalent meeting Jaguar specification. Do not use R-12 tools and equipment when repairing a R-134a system unless specified in the workshop manual. Never mix R-12 and R-134a refrigerants and oils. They are not compatible.

A/C System

The A/C system is a multi-piece, single case design, with an integral blower. The system allows the operator to control the temperature by delivering heated or cooled air to maintain a constant temperature. In addition, during A/C operation, it reduces the relative humidity of air inside the vehicle. Controls are provided to adjust the temperature and system functions, included blower motor speeds for desired airflow. Outside air is drawn from the cowl air inlet just below the windshield during all system operations except for MAX A/C cooling (when recirculated air is used) and off. For additional information on the air conditioning, refer to AIR CONDITIONING .

Control System Inputs

The climate control system inputs are selected manually from the climate control head.

Control System Outputs

The air inlet, air distribution and air temperature blend doors are all controlled by electronic stepper motors. For additional information, refer to CONTROL COMPONENTS .

Note. All air conditioning (A/C) related tests should be run in an ambient temperature of at least 10°C (50°F).

1. Verify the customer concern by operating the system.
2. Visually inspect for obvious signs of mechanical or electrical damage.
3. Listen for any unusual noises during climate control system operation.
4. Inspect the air conditioning (A/C) system with an ultraviolet (UV) lamp for traces of UV sensitive leak trace dye.

VISUAL INSPECTION

1. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
2. If the cause is not visually evident, verify the symptom and refer to the Jaguar Approved Diagnostic System.