Kia Sedona (2008 year). Instruction — part 34

Courtesy of KIA MOTORS AMERICA, INC.

DESCRIPTION

1. In-car air temperature sensor is located at the center fascia 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.

Fig. 2: Identifying In-Car Air Temperature Sensor Connector Terminals
Courtesy of KIA MOTORS AMERICA, INC.

INSPECTION

1. Ignition "ON"

2. Blow air with changing temperature to the in-car sensor air inlet. Measure sensor resistance between 2

and 4 terminals.

SPECIFICATION

TEMPERATURE SPECIFICATION

Temperature [°C (°F)]

Resistance between terminals 2and 4 (kohms)

0 (32)

97.71 ± 2.4%

15 (59)

47.13 ± 1.7%

25 (77)

30.00 ± 1.2%

35 (95)

19.59 ± 1.6%

50 (122)

10.81 ± 2.2%

2008 Kia Sedona EX

2008 HVAC A/C Compressor Controls (Full Auto) - Sedona

Microsoft

Monday, May 24, 2010 3:58:11 PM

Page 2

© 2006 Mitchell Repair Information Company, LLC.

REPLACEMENT

1. Disconnect the negative (-) battery terminal.

2. Remove the A/C control panel. Refer to INTERIOR .

3. Disconnect the connector of in-car sensor. Loosen the mounting 2 screws and then remove the in-car

sensor (A).

Fig. 3: Identifying In-Car Sensor
Courtesy of KIA MOTORS AMERICA, INC.

4. Installation is the reverse order of removal.

PHOTO SENSOR

COMPONENT LOCATION

NOTE:

In-car sensor is negative type thermistor that resistance will rise with lower
temperature, and reduce with higher temperature.

2008 Kia Sedona EX

2008 HVAC A/C Compressor Controls (Full Auto) - Sedona

Microsoft

Monday, May 24, 2010 3:58:11 PM

Page 3

© 2006 Mitchell Repair Information Company, LLC.

Fig. 4: Locating Photo Sensor
Courtesy of KIA MOTORS AMERICA, INC.

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.

2008 Kia Sedona EX

2008 HVAC A/C Compressor Controls (Full Auto) - Sedona

Microsoft

Monday, May 24, 2010 3:58:11 PM

Page 4

© 2006 Mitchell Repair Information Company, LLC.

INSPECTION

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.

Fig. 5: Identifying Photo Sensor Connector Terminals
Courtesy of KIA MOTORS AMERICA, INC.

REPLACEMENT

1. Disconnect the negative (-) battery terminal.

2. With a flat screw driver, remove the photo sensor (B) from the center of defrost nozzle (A).

Fig. 6: Identifying Photo Sensor And Center Of Defrost Nozzle
Courtesy of KIA MOTORS AMERICA, INC.

3. Install in the reverse order of removal.

AMBIENT TEMPERATURE SENSOR

2008 Kia Sedona EX

2008 HVAC A/C Compressor Controls (Full Auto) - Sedona

Microsoft

Monday, May 24, 2010 3:58:11 PM

Page 5

© 2006 Mitchell Repair Information Company, LLC.