Heating, Ventilation & Air Conditioning: Overview Kia Sportage II

OIL RETURN OPERATION

There is close affinity between the oil and the refrigerant. During normal operation, part of the oil recirculates with the refrigerant in the system. When checking the amount of oil in the system, or replacing any component of the system, the compressor must be run in advance for oil return operation. The procedure is as follows

1. Open all the doors and the engine hood.
2. Start the engine and air conditioning switch to "ON" and set the blower motor control knob at its highest position.
3. Run the compressor for more than 20 minutes between 800 and 1,000 rpm in order to operate the system.
4. Stop the engine.

DESCRIPTION

The triple switch is a combination of a medium switch as well as conventional low pressure and high pressure switches. The low pressure switch will be turned off to stop compressor operation if refrigerant pressure is low. The high pressure switch will be turned off to stop compressor operation if refrigerant pressure is too high. The medium switch will be turned on at medium level pressure to cool the A/C system operating radiator fan and condenser fan at high speed.

Scheme 20

TRIPLE PRESSURE SWITCH SPECIFICATIONS

Scheme 21

Scheme 22

Scheme 23

Scheme 24

The evaporator temperature sensor will detect the evaporator core temperature and interrupt compressor relay power in order to prevent evaporator freezing by excessive cooling.

It is a negative type thermistor whose resistance is inversely proportional to temperature.

Scheme 25

Scheme 26

1. Ignition "OFF"
2. Disconnect evaporator temperature sensor.
3. Using the multi-tester, Measure resistance between terminal "1" and "2" of evaporator temperature sensor.

1. The photo sensor is located at the center of defrost nozzle.
2. The photo sensor contains a photovoltaic (sensitive to sunlight) diode. The solar radiation received by its light receiving portion, generates an electromotive force in proportion to the amount of radiation received which is transferred to the automatic temperature control module so that the solar radiation compensation will be performed.

Scheme 27

1. Ignition "ON"
2. Using the scan tool.
3. Emit intensive light toward photo sensor using sunshine, and check the output absolute voltage change.
4. The absolute voltage will rise with higher intensive light and reduce with lower intensive light. NOTE: When checking photo sensor, select a place where sun shines directly on it.

Scheme 28

1. Disconnect the negative (-) battery terminal.
2. Using the (-) driver, Remove the photo sensor (B) from the center of defrost nozzle (A).
3. Install in the reverse order of removal.

Scheme 29

Scheme 30

1. Water temperature sensor(A) is located at the heater unit.
2. It detects coolant temperature. Its signal is used for cold engine lockout control. When the driver operates the heater before the engine is warmed up, the signal from sensor causes the heater control unit to reduce blower motor speed until coolant temperature reaches the threshold value.

Scheme 31

1. Ignition "OFF"
2. Disconnect water temperature sensor.
3. Using the multi-tester, Measure resistance between terminal "1" and "2" of water temperature sensor. WATER TEMPERATURE SENSOR SPECIFICATIONS Coolant temperature [°C(°F)] Resistance between terminals 1and 2 (kohms ) -15 (5) 73.6 +/- 3% 0 (32) 32.9 +/- 3% 15 (59) 15.8 +/- 3% 25 (77) 10.0 +/- 3% 35 (95) 6.0 +/- 3% 60 (140) 2.5 +/- 3%
4. If the measured resistance is not specification, substitute with a known-good water temperature sensor and check for proper operation.
5. If the problem is corrected, replace the water temperature sensor.

Scheme 32

Scheme 33

1. Disconnect the negative(-) battery terminal.
2. Remove the passenger's center lower side cover(A) .
3. Disconnect the connector(A) of water temperature sensor.
4. Remove the caulk of water temperature sensor by using the scraper.
5. Pull the water temperature sensor out at the heater unit with the clamp(C). NOTE: Take care that wire of water temperature sensor is not to be damaged.
6. Install in the reverse order of removal. NOTE: Apply caulk to the water temperature sensor. Make sure that there is no air leakage.

Scheme 34

1. The ambient temperature sensor is located at the front of the condenser and detects ambient air temperature. It is a negative type thermistor; resistance will increase with tower temperature, and decrease with higher temperatures.
2. The sensor output will be used for discharge temperature control, temperature regulation door control, blower motor level control, mix mode control and in-car humidity control. NOTE: If the ambient temperature is below 2.0°C (35.6°F), the A/C compressor will be stopped. The compressor will be operated by manual operating.

Scheme 35

1. Ignition "OFF"
2. Disconnect ambient temperature sensor.
3. Check the resistance of ambient temperature sensor between terminals 1 and 2 whether it is changed by changing temperature of the ambient temperature sensor. AMBIENT TEMPERATURE SENSOR SPECIFICATIONS Ambient temperature [°C(°F)] Resistance between terminals 1 and 2 ( kohms ) -15 (5) 215.3+/-3% 0 (32) 97.5+/-3% 15 (59) 59.6+/-3% 25 (77) 30.0+/-3% 35 (95) 24.2+/-3% 60 (140) 16+/-3%
4. If the measured resistance is not specification, substitute with a known-good ambient temperature sensor and check for proper operation.
5. If the problem is corrected, replace the ambient temperature sensor.

Scheme 36

1. Disconnect the negative (-) battery terminal.
2. Remove the front bumper (Refer to «BUMPER»(ref-226879) ).
3. Remove the ambient temperature sensor (B) after loosening the mounting screws(A).
4. Install in the reverse order of removal.

Scheme 37

The evaporator temperature sensor will detect the evaporator core temperature and interrupt compressor relay power in order to prevent evaporator freezing by excessive cooling.

It is a negative type thermistor whose resistance is inversely proportional to temperature.

Scheme 38

1. Ignition "OFF"
2. Disconnect evaporator temperature sensor.
3. Using the multi-tester, Measure resistance between terminal "1" and "2" of evaporator temperature sensor. EVAPORATOR TEMPERATURE SENSOR SPECIFICATIONS Evaporator core temperature [°C(°F)] Resistance [kohms ] -10(14) 13.6 0(32) 8.0 10(50) 4.9 15(59) 3.9 30(86) 2.0 40(104) 1.3 50(122) 0.9
4. If the measured resistance is not specification, substitute with a known-good evaporator temperature sensor and check for proper operation.
5. If the problem is corrected, replace the evaporator temperature sensor.

Scheme 39

1. AQS is located at center support in front of the engine radiator, and detects hazardous elements in ambient air providing output signal to control.
2. It will detect sulfurous acid gas, carbon dioxide, carbon monoxide, hydrocarbon and allergen.

Scheme 40

1. Ignition "ON"
2. Using the scan tool.
3. Check the output voltage of AQS between terminals 2 and 3. AIR QUALITY SENSOR SPECIFICATIONS Condition Output signal Fresh/recirculation Normal condition 4 ~ 5V Fresh Hazardous gas detection 0 ~ 1V Recirculation
4. AQS diagnosis and fail safe. Open signal detection period: 7 seconds (AQS switch OFF, IGN ON). 2.5V detected for >/= 3.5 seconds during 7 second initialization period. Fail safe: AQS function inoperative (AQS cannot be selected). Fresh air and recirculation mode selection may be accomplished manually. NOTE: When IG is turned ON, AQS sensor heats for 34+/-5 seconds, it will output below 1.0 voltage during this time.

Scheme 41

1. Disconnect the negative (-) battery terminal.
2. Remove the front bumper.
3. Remove the AQS (B) after loosening the mounting screws (A).
4. Install in the reverse order of removal.

Scheme 42

Scheme 43

1. Humidity sensor is located at the lower crush pad and detects in-car humidity for in-car humidity control.
2. If ambient air temperature or in-car humidity is outside certain range, it will turn on A/C to control in-car humidity preventing in car fogging. Air conditioner operation depends on ambient temperature and humidity.

1. Heater unit includes mode control actuator and temperature control actuator.
2. Temperature control actuator is located at the heater unit. Signal from control unit adjusts position of temperature door by operating temperature switch and then temperature will be regulated by the hot/cold air ratio determined by position of temperature door.

Scheme 44

1. Ignition "OFF".
2. Disconnect the connector of temperature control actuator.
3. Verify that the temperature control actuator operates to the hot position when connecting 12V to the terminal 1 and grounding terminal 2.
4. Verify that the temperature control actuator operates to the cool position when the connections are reversed.
5. Check the voltage between terminals 3 and 4. TEMPERATURE CONTROL ACTUATOR SPECIFICATIONS Door position Voltage (3-4) Error detecting Max. cooling 0.3 +/- 0.15V Low voltage: 0.08V or less Max. heating 4.7 +/- 0.15V High voltage: 4.9V or more It will feed back current position of actuator to controls.
6. If the measured voltage is not within specification, substitute with a known-good temperature control actuator and check for proper operation.
7. If the problem is corrected, replace the temperature control actuator.

Scheme 45

1. Disconnect the negative (-) battery terminal.
2. Remove the side cover.
3. Disconnect the connector (A) of temperature control actuator after removing the air duct.
4. Loosen the mounting screw (B) and then remove the temperature control actuator (C).
5. Install in the reverse order of removal.

Scheme 46

The mode control actuator is located at the heater unit. It adjusts position of mode door by operating mode control actuator based on signal of A/C control unit. Pressing mode select switch makes the mode control actuator shift in order of vent--> B/L --> floor --> mix.

Scheme 47

1. Ignition "OFF"
2. Disconnect the connector of mode control actuator.
3. Verify that the mode control actuator operates to the vent position when connecting 12V to the terminal 1 and grounding terminal 2.
4. Verify that the mode control actuator operates to the defrost position when the connections are reversed.
5. Check the voltage between terminals 4 and 5. MODE CONTROL ACTUATOR SPECIFICATIONS Door position Voltage (4-5) Error detecting Vent 0.3 +/- 0.15V Low voltage: 0.08V or less Defrost 4.7 +/- 0.15V High voltage: 4.9V or more It will feed back current position of actuator to controls.
6. If the measured voltage is not within specification, substitute with a known-good mode control actuator and check for proper operation.
7. If the problem is corrected, replace the mode control actuator.

Scheme 48

1. Disconnect the negative (-) battery terminal.
2. Remove the lower crush panel.
3. Disconnect the connector (A) of mode control actuator after removing the air duct.
4. Loosen the mounting screws (B) and then remove the mode control actuator (C).
5. Install in the reverse order of removal.

Scheme 49

Scheme 50

Scheme 51

1. Disconnect the negative (-) battery terminal.
2. Remove the heater unit (See «HEATER UNIT»(ref-235431-S09286395152006062100000) )
3. Disconnect the connectors from the fresh and recirculation actuator, the blower relay, the blower motor and power mosfet. Remove the self-tapping screws (A), the mounting nut (B), the mounting bolt (C) and the blower unit (D). NOTE: Make sure that there is no air leaking out of the blower and duct joints.
4. Install in the reverse order of removal.

Scheme 52

Scheme 53

1. Connect the battery voltage and check the blower motor rotation.
2. If the blower motor does not operate properly, substitute with a known-good blower motor and check for proper operation.
3. If the problem is corrected, replace the blower motor.

Scheme 54

Scheme 55

1. Disconnect the negative (-) battery terminal.
2. Disconnect the connector (A) of the blower motor.
3. Remove the blower motor (A) after loosening the mounting screws.
4. Install in the reverse order of removal.

Scheme 56

This has particle filter which eliminates foreign materials and odor. The particle filter includes odor filter as well as conventional dust filter to ensure comfortable interior environment.

Scheme 57

Scheme 58

1. Open the glove box. Lower the glove box down completely by removing the tension cord (A) and the glove box stopper (B) to the glove box.
2. Remove the filter cover (A) with pushing the knob.
3. Replace the air filter (B). NOTE: In case of driving in an air-polluted area or rugged terrain, check and replace the air filter as frequently as possible. Replacement period: 15,000 km (9320 mile)

Scheme 59

1. The fresh and recirculation actuator is located at the blower unit.
2. It regulates the intake door by signal from control unit.
3. Pressing the intake selection switch will shift between recirculation and fresh air modes.

Scheme 60

1. Ignition "OFF".
2. Disconnect the connector of fresh and recirculation actuator.
3. Verify that the fresh and recirculation actuator operates to the fresh position when connecting 12V to the terminal 1 and grounding terminal 2.
4. Verify that the fresh and recirculation actuator operates to the recirculation position when the connections are reversed.
5. If the fresh and recirculation actuator does not operate properly, substitute with a known-good fresh and recirculation actuator and check for proper operation.
6. If the problem is corrected, replace the fresh and recirculation actuator.

Scheme 61

1. Disconnect the negative (-) battery terminal.
2. Remove the glove box.
3. Disconnect the connector (A) of fresh and recirculation actuator.
4. Loosen the mounting screw (B) and then remove the fresh and recirculation actuator (C) from the blower unit (D).
5. Install in the reverse order of removal.

Scheme 62

GENERAL DESCRIPTION

Humidity sensor located at crush pad, detects in-car humidity for in-car humidity control. If ambient air temperature or in-car humidity is outside certain range, it will turn on A/C to control in-car humidity for preventing in-car fogging. Air conditioner operation depends on ambient temperature and humidity.

DTC DESCRIPTION

The A/C controller sets DTC B1200 if there is an open circuit in humidity sensor signal harness or the measured frequency value of sensor is more than threshold value (about 7,224 Hz )

Refer to DTC B1200 .

The A/C controller sets DTC B1201 if there is a short circuit in humidity sensor signal harness or the measured frequency value of sensor is less than threshold value(about 6,100 Hz )

A water temp. sensor located at heater unit, detects coolant temperature. Its signal is used for cold engine lockout control. When the driver operates the heater before the engine is warmed up, the signal from sensor causes the heater control unit to reduce blower motor speed until coolant temperature reaches the threshold value.

The A/C controller sets DTC B1202 if there is an open circuit in water temp. sensor signal harness or the measured resistance value of the sensor is more than the threshold value(about 176.3kohms)

Refer to DTC B1202 .

The A/C controller sets DTC B1203 if there is a short circuit in water temp. sensor signal harness or the measured resistance value of sensor is less than threshold value(about 1.2kohms)

The in car temperature sensor located at crush pad, control unit contains a thermistor which measures the temperature of the inside. The signal, decided by the resistance value which changes in accordance with perceived inside temperature, is delivered to heater control unit and according to this signal, the control unit regulates in car temperature to intended value.

The A/C controller sets DTC B1233 if there is a short circuit in in car temp. sensor signal harness or the measured resistance value of sensor is less than threshold value(about 3.23kohms)

Refer to DTC B1233 .

The A/C controller sets DTC B1234 if there is an open circuit in in car temp. sensor signal harness or the measured resistance value of sensor is more than threshold value(about 528kohms)

The ambient temperature senor located at the center stay of the condenser, detects ambient air temperature. It is a negative type thermistor whose resistance is inversely proportional to temperature. Its output is used for discharge temperature sensor, sensor fail-safe, temperature regulation door lock, blower motor level control, mix mode control and in-car humidity control.

The A/C controller sets DTC B1237 if there is a short circuit in ambient temp. sensor signal harness or the measured resistance value of sensor is less than threshold value(about 10.8kohms)

Refer to DTC B1237 .

The A/C controller sets DTC B1238 if there is an open circuit in ambient temp. sensor signal harness or the measured resistance value of sensor is more than threshold value(about 507kohms)

The Evaporator temperature sensor located on heater unit, detects the core temperature and interrupts compressor relay power, in order to prevent evaporator freezing by excessive cooling. It is a negative type thermistor whose resistance is inversely proportional to temperature.

The A/C controller sets DTC B1241 if there is a short circuit in evaporator temp. sensor signal harness or the measured resistance value of sensor is less than threshold value(about 0.9kohms)

Refer to DTC B1241 .

The A/C controller sets DTC B1242 if there is an open circuit in evaporator temp. sensor signal harness or the measured resistance value of sensor is more than threshold value(about 13.6kohms)

Temperature control actuator located at heater unit, regulates the temperature by the procedure as follows. Signal from control unit adjusts position of temp. door by operating temp. motor and then temperature will be regulated by the hot/cold air ratio decided by position of temp. door.

The A/C controller sets DTC B1245 if there is an open circuit or poor connection in the air mix potentiometer.

Refer to DTC B1245 .

The A/C controller sets DTC B1246 if there is a short to power in the air mix potentiometer.

The mode control actuator mounted on heater unit, adjusts position of mode door by operating Direction Motor based on signal of A/C control unit. Pressing mode select switch makes the mode control actuator shift in order of vent--> B/L --> floor --> mix.

The A/C controller sets DTC B1249 if there is an open circuit or poor connection in the Direction potentiometer.

Refer to DTC B1249 .

The A/C controller sets DTC B1250 if there is a short to power in the Direction potentiometer.

Refer to DTC B1245 .

The A/C controller sets DTC B2406 if the air mix actuator doesn't move to intended position within 40sec (In this case, A/C controller try to move temp, door for 2sec. 3 times, every 20 sec, before setting DTC).

Refer to DTC B1249 .

The A/C controller sets DTC B2409 if the direction motor doesn't move to intended position within 40sec(In this case, A/C controller try to move mode door for 2sec. 3 times, every 20 sec, before setting DTC).