heating CHERY TIGGO 2009 Service Owner's Guide

Downloaded from www.Manualslib.com manuals search engine GENERAL INFORMATION
Description
All models are equipped with a common HVAC housing assembly that combines A/C and heating capabilities into a
single unit mounted within the passenger compartment. The HVAC housing assembly consists of three separate
housings:
•HVAC housing — The HVAC housing is mounted to the dash panel behind the instrument panel and contains
the A/C evaporator. The HVAC housing has mounting provisions for the air inlet housing, blower motor and the
air distribution housing.
• Air distribution housing — The air distribution housing is mounted to the rear of the HVAC housing and con-
tains the heater core, blend-air and mode-air doors and door linkage.
• Air inlet housing — The air inlet housing is mounted to the passenger side end of the HVAC housing. The air
inlet housing contains the recirculation-air door and actuator.
Operation
The A/C system is designed for the use of a non-CFC, R-134a refrigerant and uses an A/C evaporator to cool and
dehumidify the incoming air prior to blending it with the heated air. Temperature control determines the discharge air
temperature by operating the temperature control cable, which moves the blend-air door. This allows an almost
immediate control of the output air temperature of the system. The mode door cable operates the mode-air doors
which direct the flow of the conditioned air out the various air outlets, depending on the mode selected. When
equipped with A/C, the recirculation door actuator operates the recirculation-air door which closes off the fresh air
intake and recirculates the air already inside the vehicle. The electric recirculation door actuator and the blower motor
are connected to the vehicle electrical system by the instrument panel wire harness. The blower motor controls the
velocity of air flowing through the HVAC housing assembly by spinning the blower wheel within the HVAC housing at
the selected speed by use of the blower motor resistor, which is around the blower motor.
The air distribution housing must be removed from the HVAC housing and disassembled for service of the blend-air
and mode-air doors. The air inlet housing must be removed from the HVAC housing and disassembled for service of
the recirculation-air door. The HVAC housing must be removed from the vehicle and disassembled for service of the
A/C evaporator.
Specifications
Torque Specifications
DESCRIPTION TORQUE (N·m)
All General Service Screws 2
Evaporator Bolts 4
Expansion Valve Bolts 10
Pipeline Stent 4
Refrigerant Lines To A/C Accumulator 6
Condenser Bolts 6
Refrigerant Lines To A/C Compressor Bolt 30
Refrigerant Lines 10
Refrigerant Lines To A/C Evaporator Bolt 25
13–26Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine ON-VEHICLE SERVICE
HVAC Housing
Removal & Installation
1. Evacuate the A/C system (See A/C System Evacuation and Recharge in Section 13 Heating & Air Conditioning).
2. Drain the cooling system and then disconnectheater hoses (1). (See Cooling System Draining &
Filling in Section 06 Cooling).
3. Remove the instrument panel (See Instrument Panel Removal & Installation in Section 15 Body & Accessories).
4. Remove the evaporator assembly upper retaining bolts (1).
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13–29Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 5. Remove the evaporator assembly lower retainingbolts (1).
6. Disconnect the electrical connectors. Remove the evaporator assembly.
7. Installation is in the reverse order of removal.
Installation Notes:
• Lubricate new rubber O-ring seals with clean refrigerant oil and install them and new gaskets onto the refriger-
ant line fittings.
• Use only the specified O-rings as they are made of a special material for the R-134a system.
• Use only refrigerant oil recommended for the A/C compressor in the vehicle.
• Recharge the A/C system (See A/C System Evacuation and Recharge in Section 13 Heating & Air Condition-
ing).
Blower Motor
Description
The blower motor is mounted in the HVAC housing. The following are blower motor functions:
•The blower motor will operate whenever the ignition switch is in the ON position and the blower motor control
is in any position except Off.
• The blower motor can be accessed for service from underneath the instrument panel.
• The blower motor and blower motor wheel are factory balanced as an assembly and cannot be adjusted or
repaired and must be replaced if found inoperative or damaged.
Operation
The blower motor is used to control the velocity of air moving through the HVAC housing by spinning the blower
wheel within the HVAC air inlet housing at the selected speed. The blower motor is a 12-volt, direct current (DC)
motor mounted within a plastic housing with an integral wire harness connector. The blower wheel is secured to the
blower motor shaft and is positioned within the air inlet housing on the passenger side of the HVAC housing.
ON-VEHICLE SERVICE
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13–30Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 12. If the noise is from liquid refrigerant slugging in the A/C suction line, replace the A/C accumulator and check therefrigerant oil level and the refrigerant system charge.
13. If a slugging condition still exists after replacing the A/C accumulator, replace the A/C compressor.
Refrigerant System Leaks
WARNING!
R-134a service equipment or vehicle A/C systems should not be pressure tested or leak tested with compressed
air. Mixture of air and R-134a can be combustible at elevated pressures. These mixtures are potentially danger-
ous and may result in fire or explosion causing property damage, personal injury or death. Avoid breathing A/C
refrigerant and lubricant vapor or mist. Exposure may irritate eyes, nose and throat. Use only approved service
equipment meeting SAE requirements to discharge an R-134a system. If accidental system discharge occurs,
ventilate work area before resuming service.
NOTE :
If the A/C refrigerant system charge is empty or low, a leak in the A/C system is likely. Inspect all A/C lines, fittings
and components for an oily residue. Oil residue can be an indicator of an A/C system leak location.
NOTE :
The only way to correctly determine if the refrigerant system is fully charged with R-134a is to completely evacuate
and recharge the A/C system.
Refrigerant System Empty
1. Evacuate the refrigerant system to the lowest degree of vacuum possible. Determine if the system holds a vac- uum for 15 minutes. If vacuum is held, a leak is probably not present. If system will not maintain vacuum level,
proceed to STEP 2.
2. Prepare and dispense 0.3 kilograms of R-134a refrigerant into the evacuated refrigerant system and proceed to STEP 1 of the System Low procedure.
Refrigerant System Low
1. Position the vehicle in a wind-free work area. This will aid in detecting small leaks.
2. Operate the heating-A/C system with the engine at idle under the following conditions for at least 5 minutes:Doors or windows open, transaxle in Park or Neutral with the parking brake set (depending on application), A/C-
Heater controls set to outside air, full cool, panel mode, high blower and with A/C compressor engaged.
3. Shut the vehicle Off and wait2-7minutes. Then use an electronic leak detector that is designed to detect R-134a refrigerant and search for leaks. Fittings, lines or components that appear to be oily usually indicate a
refrigerant leak. To inspect the A/C evaporator for leaks, insert the leak detector probe into the drain tube open-
ing or an air outlet. A dye for R-134a is available to aid in leak detection. Use only approved refrigerant dye.
CAUTION:
A leak detector only designed for R-12 refrigerant will not detect leaks in an R-134a refrigerant sys-
tem.
DIAGNOSIS & TESTING
13–36Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 1. Connect the refrigerant recovery/recycling stationto the vehicles high and low side A/C line
connectors.
NOTE: The refrigerant recovery/recycling station
connectors are connected to the vehicle in the fol-
lowing way:
• BLUE connector (1) is connected to the A/C low side
fitting.
• RED connector (2) is connected to the A/C high side
fitting.
A/C System Evacuation
CAUTION:
Do NOT run the engine with a vacuum pump in operation or with a vacuum present within the A/C
system. Failure to follow this caution will result in serious A/C compressor damage.
NOTE :
Special effort must be used to prevent moisture from entering the A/C system oil. Moisture in the oil is very difficult
to remove and will cause a reliability problem with the A/C compressor.
If the refrigerant system has been open to the atmosphere, it must be evacuated before the system can be filled.
Moisture and air mixed with the refrigerant will raise the compressor high pressure above acceptable operating lev-
els. This will reduce the performance of the A/C system and damage the A/C compressor. Moisture will boil at near
room temperature when exposed to vacuum.
NOTE :
When connecting the service equipment coupling to the line fitting, verify that the valve of the coupling is fully closed.
This will reduce the amount of effort required to make the connection.
To evacuate the refrigerant system:
1. With the engine OFF, connect a suitable charging station, refrigerant recovery machine or a manifold gauge set with vacuum pump and refrigerant recovery equipment. Do not operate the engine with a vacuum on the A/C
system.
2. Open the suction and discharge valves and start the vacuum pump. The vacuum pump should run a minimum of 45 minutes prior to charge to eliminate all moisture in system. When the suction gauge reads to the lowest
degree of vacuum possible for 30 minutes, close all valves and turn off vacuum pump. If the system fails to
reach specified vacuum, the refrigerant system likely has a leak that must be corrected. If the refrigerant system
maintains specified vacuum for at least 30 minutes, start the vacuum pump, open the suction and discharge
valves. Then allow the system to evacuate an additional 10 minutes.
3. Close all valves.
4. Turn off and disconnect the vacuum pump.
5. Charge the refrigerant system.
A/C System Recharge
After all refrigerant system leaks have been repaired and the refrigerant system has been evacuated, a refrigerant
charge can be injected into the system.
CAUTION:
A small amount of refrigerant oil is removed from the A/C system each time the refrigerant system
is recovered and evacuated. Before charging the A/C system, you MUST replenish any oil lost dur-
ing the recovery process.
1. Evacuate the refrigerant system (See A/C System Evacuation and Recharge in Section 13 Heating & Air Con- ditioning).
ON-VEHICLE SERVICE
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13–38Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 2. A manifold gauge set and an R-134a refrigerant recovery/recycling/charging station that meets SAE standardJ2210 should be connected to the refrigerant system.
3. Open both the suction and discharge valves, then open the charge valve to allow the refrigerant to flow into the system.
4. When the transfer of refrigerant has stopped, close both the suction and discharge valves.
5. If all of the refrigerant charge did not transfer from the dispensing device, open all of the windows in the vehicle and set the heating-A/C system controls so that the A/C compressor is operating and the blower motor is running
at its lowest speed setting. Run the engine at a steady high idle (about 2000 RPM).
6. Open the low-pressure valve to allow the remaining refrigerant to transfer to the refrigerant system.
WARNING!
Take care not to open the discharge (high pressure) valve at this time. Failure to follow this warning could result
in possible personal injury or death.
7. Disconnect the refrigerant recovery/recycling station from the refrigerant system service ports.
8. Reinstall the caps onto the refrigerant system service ports.
Compressor
Description
Vehicles equipped with the 1.6L & 1.8L & 2.0L engine use a SD7V16 clutch-less compressor. The 2.4L equipped
vehicles use a V5 clutch-less compressor. The compressor is a variable displacement compressor. The largest dis-
placement is 161.3 ml/r, displacement range of 5% to 100%.
CAUTION:
DONT run the engine with a vacuum pump in operation or with a vacuum present within the A/C
system. Failure to follow this caution will result in serious A/C compressor damage.
NOTE :
The compressor drive hub and the pulley and bearing assembly cannot be serviced separately from the A/C com-
pressor. In the event of drive hub or pulley and bearing assembly damage or failure, the A/C compressor, drive hub
and pulley and bearing must be replaced as an assembly.
Operation
The A/C compressor is controlled by the Engine Control Module (ECM), depending on engine application. The ECM
calculates compressor displacement required by A/C system load and demand by monitoring vehicle speed, A/C high
side pressure, engine speed, evaporator temperature, accelerator pedal position, ambient temperature and A/C-
Heater request signals. The ECM then sends a pulse width modulated signal to the A/C compressor control solenoid
to increase or decrease refrigerant flow through an orifice located within the compressor housing. The amount of
refrigerant allowed to pass through the orifice in the compressor determines the head pressure which controls the
angle of the swash plate, which in turn, determines the amount of compressor displacement. When there is no
demand for A/C, the swashplate is adjusted to nearly a zero degree angle, which removes compressor torque drag
from the engine.
NOTE :
The A/C compressor cannot be repaired and it must be replaced if found inoperative or damaged. If an internal fail-
ure of the A/C compressor has occurred, the A/C accumulator and the A/C liquid line must also be replaced.
Removal & Installation - 1.6L & 1.8L & 2.0L
WARNING!
Review safety precautions and warnings in this group before performing this procedure. Failure to follow the
warnings and cautions could result in possible personal injury or death.
ON-VEHICLE SERVICE
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13–39Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine CAUTION:
The A/C accumulator and the A/C liquid line must be replaced if an internal failure of the A/C com-
pressor has occurred. Failure to replace the A/C accumulator and the A/C liquid line can cause
serious damage to the replacement A/C compressor.
NOTE :
When replacing multiple A/C system components, determine how much oil should be removed from the new A/C
compressor.
NOTE :
Replacement of the refrigerant line O-ring seals and gaskets is required anytime a refrigerant line is opened. Failure
to replace the rubber O-ring seals and metal gaskets could result in a refrigerant system leak.1. Evacuate the A/C system (See A/C System Evacuation and Recharge in Section 13 Heating & Air Conditioning).
2. Disconnect the A/C compressor electrical connector.
3. Remove the engine drive belt (See Drive Belt Removal & Installation in Section 02 Engine).
4. Remove the intake manifold (See Intake Manifold Removal & Installation in Section 02 Engine).
5. Remove the A/C compressor line bolt (1) from the A/C compressor.
(Tighten: A/C compressor line bolt to 20 N·m)
NOTE: After removing the A/C lines, plug the A/C
lines to prevent any debris from entering the A/C
system.
6. Loosen the A/C compressor bracket bolt connecting the A/C compressor and bracket. (Tighten: A/C compressor bracket bolt to 40 N·m)
ON-VEHICLE SERVICE
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VISM130017
13–40Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 7. Remove the A/C compressor bracket bolts (1).(Tighten: A/C compressor bracket bolts to 40 N·m)
8. Carefully remove the A/C compressor and bracket assembly.
9. Installation is in the reverse order of removal.
Installation Notes:
• Lubricate new rubber O-ring seals with clean refrig-
erant oil and install them and new gaskets onto the
refrigerant line fittings.
• Use only the specified O-rings as they are made of
a special material for the R-134a system.
• Use only refrigerant oil of the type recommended
for the A/C compressor in the vehicle.
• Recharge the A/C system (See A/C System Evacuation and Recharge in Section 13 Heating & Air Condition-
ing).
Removal & Installation - 2.4L
1. Evacuate the A/C system (See A/C System Evacuation and Recharge in Section 13 Heating & Air Conditioning).
2. Disconnect the A/C compressor electrical connector.
3. Remove the engine drive belt (See Drive Belt Removal & Installation in Section 02 Engine).
4. Remove the A/C compressor low-pressure line bolt (1) and high-pressure line bolt (2) from the A/C compressor.
(Tighten: A/C compressor line bolts to 20 N·m)
5. Remove the A/C compressor mounting bolts (1). (Tighten: A/C compressor bracket bolt to 40 N·m)
6. Carefully remove the A/C compressor assembly.
7. Installation is in the reverse order of removal.
Installation Notes:
• Lubricate new rubber O-ring seals with clean refrigerant oil and install them and new gaskets onto the refriger-
ant line fittings.
• Use only the specified O-rings as they are made of a special material for the R-134a system.
ON-VEHICLE SERVICE
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13–41Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine •Use only refrigerant oil of the type recommended for the A/C compressor in the vehicle.
• Recharge the A/C system (See A/C System Evacuation and Recharge in Section 13 Heating & Air Condition-
ing).
Evaporator
Description
The evaporator core is located in the HVAC housing, under the instrument panel. The evaporator coil is positioned in
the HVAC housing so that all air that enters the housing must pass over the fins of the evaporator before it is dis-
tributed through the system ducts and outlets. However, air passing over the evaporator core fins will only be con-
ditioned when the compressor is engaged and circulating refrigerant through the evaporator coil tubes.
Operation
Refrigerant enters the evaporator from the orifice tube as a low-temperature, low-pressure liquid. As air flows over
the fins of the evaporator, the humidity in the air condenses on the fins, and the heat from the air is absorbed by the
refrigerant. Heat absorption causes the refrigerant to boil and vaporize. The refrigerant becomes a low-pressure gas
before it leaves the evaporator. The evaporator core housing directs airflow from the blower motor through the evap-
orator 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).
Removal & Installation
1. Evacuate the A/C system (See A/C System Evacuation and Recharge in Section 13 Heating & Air Conditioning).
2. Remove the expansion valve.
3. Remove the HVAC housing (See HVAC Housing Removal and Installation in Section 13 Heating & Air Condi-
tioning).
4. Remove the retaining bolts and screws.
5. Remove the evaporator core.
6. Installation is in the reverse order of removal.
Installation Notes:
• Lubricate new rubber O-ring seals with clean refrigerant oil and install them and new gaskets onto the refriger-
ant line fittings.
• Use only the specified O-rings as they are made of a special material for the R-134a system.
• Use only refrigerant oil of the type recommended for the A/C compressor in the vehicle.
• Recharge the A/C system (See A/C System Evacuation and Recharge in Section 13 Heating & Air Condition-
ing).
Condenser
Description
The condenser is located in the air flow in front of the engine cooling radiator. The condenser transforms the refrig-
erant from a gas into a liquid. It is attached to the vehicle with bolts and the A/C lines with fittings.
Operation
When the heat is removed from the refrigerant, it condenses. When the refrigerant leaves the condenser, it becomes
a high-pressure liquid refrigerant. The volume of air flowing over the condenser fins is critical to the proper cooling
performance of the air conditioning system. Therefore, it is important that there are no objects placed in front of the
radiator grille openings in the front of the vehicle or foreign material on the condenser fins that might obstruct proper
air flow. Also, any factory-installed air seals or shrouds must be properly reinstalled following radiator or condenser
service.
ON-VEHICLE SERVICE
13–42Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Removal & Installation
1. Disconnect the negative battery cable.
2. Evacuate the A/C system (See A/C System Evacuation and Recharge in Section 13 Heating & Air Conditioning).
3. Remove the front bumper (See Front Bumper Removal & Installation in Section 15 Body & Accessories).
4. Remove the nut (3) that secures the A/C high-pres-sure liquid line to the A/C condenser. Remove and
discard the O-ring seal and gasket.
NOTE: After removing the A/C lines, plug the A/C
lines to prevent any debris from entering the A/C
system.
5. Remove the nut (2) that secures the A/C high-pres- sure gas line to the A/C condenser. Remove and
discard the O-ring seal and gasket.
6. Remove the condenser mounting bolts (1).
7. Remove the condenser from the engine compartment.
8. Installation is in the reverse order of removal.
Installation Notes:
• Lubricate new rubber O-ring seals with clean refrigerant oil and install them and new gaskets onto the refriger-
ant line fittings.
• Use only the specified O-rings as they are made of a special material for the R-134a system.
• Use only refrigerant oil of the type recommended for the A/C compressor in the vehicle.
• Recharge the A/C system (See A/C System Evacuation and Recharge in Section 13 Heating & Air Condition-
ing).
Accumulator
Description
The accumulator is connected directly between the condenser and the expansion valve. Accumulator is used on sys-
tems that use an orifice tube to meter refrigerants into the evaporator.
Operation
The primary function of the accumulator is to isolate the compressor from any damaging liquid refrigerant. The accu-
mulator removes debris and moisture from the air conditioning system.
Removal & Installation
1. Disconnect the negative battery cable.
2. Evacuate the A/C system (See A/C System Evacuation and Recharge in Section 13 Heating & Air Conditioning).
ON-VEHICLE SERVICE
LTSM130005
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13–43Chery Automobile Co., Ltd.