A/c Compressor Controls (Full Auto): Overview Kia Sedona II

Scheme 3

Scheme 4

1. In-car air temperature sensor is located at the center facia lower panel.
2. The sensor 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.
3. It perceives the inside temperature, changes the resistance value, and enters the corresponding voltage into the automatic temperature control module.
4. It will used for discharge temperature control, sensor fail-safe, temperature door control, blower motor level control, and A/C auto control.

DESCRIPTION

1. The photo sensor (A) 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 5

1. Ignition "ON"
2. Using the scan tool.
3. Emit intensive light toward photo sensor using a lamp, and check the output voltage change.
4. The voltage will rise with higher intensive light and reduce with lower intensive light.

Scheme 6

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

Scheme 7

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 lower 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 0°C (32°F), the A/C compressor will be stopped. The compressor will be operated by manual operating.

Scheme 8

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 of the ambient temperature. SPECIFICATION AMBIENT TEMPERATURE SPECIFICATION Ambient temperature [°C (°F)] Resistance between terminals l and 2 (kohms) -10 (14) 158.18 ± 4.9% 0 (32) 95.10 ± 3.9% 10 (50) 58.80 ± 2.9% 20 (68) 37.32 ± 1.9%
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 9

1. Disconnect the negative (-) battery terminal.
2. Remove the front bumper. (Refer to «FRONT BUMPER»(ref-269622-S06420756682007110100000) )
3. Remove the ambient temperature sensor (A).
4. Installation is the reverse order of removal.

Scheme 10

1. Humidity sensor is located at the lower crush pad and detected 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.