heater rear

7/26/2019 Heater Rear

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2008 HVAC

Rear Heater - Sedona

REAR HEATER UNIT

COMPONENT LOCATION

Fig. 1: Identifying Rear Heater Unit Component Location

COMPONENTS

2008 Kia Sedona EX

2008 HVAC Rear Heater - Sedona

2008 Kia Sedona EX



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Fig. 2: Identifying Rear Heater Unit Components (1 Of 2)

2008 Kia Sedona EX



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Fig. 3: Identifying Rear Heater Unit Components (2 Of 2)

REPLACEMENT

1. Disconnect the negative (-) battery terminal.

2. Recover the refrigerant with a recovery/recycling/charging station.

3. When the engine is cool, drain the engine coolant from the radiator.

4. Remove luggage side trim. Refer to LUGGAGE SIDE TRIM REPLACEMENT.

5. Remove the rear speaker.

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6. Loosen the air duct mounting screw, and then remove the rear air duct (A).

Fig. 4: Identifying Rear Air Duct

7. Loosen the refrigerant line mounting bolts, and then remove the rear refrigerant line (A).

Fig. 5: Identifying Rear Refrigerant Line

8. Remove the heater hose (A), drain hose (B).

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Fig. 6: Identifying Heater Hose And Drain Hose

9. Remove the rear heater main connector (A).

Fig. 7: Identifying Rear Heater Main Connector

10. Loosen the rear heater mounting nuts, and then remove the rear heater unit (A).

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Fig. 8: Identifying Rear Heater Unit

11. Remove the rear temp actuator. Refer to TEMPERATURE CONTROL ACTUATOR.

12. Remove the rear temp actuator lever (A).

Fig. 9: Identifying Rear Temp Actuator Lever

13. Remove the heater core.

14. Installation is the reverse order of removal.

REAR HEATER BLOWER UNIT

INSPECTION

1. Connect the battery voltage and check the blower motor rotation.

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Fig. 10: Checking Blower Motor

2. If the blower motor voltage is not operated well, substitute with a known-good blower motor and checkfor proper operation.

3. If the problem is corrected, replace the blower motor.

REPLACEMENT


2. Disconnect the connector (A) of the blower motor.

3. Remove the blower motor (B) after loosening the mounting screws.

Fig. 11: Identifying Blower Motor And Connector


REAR TEMPERATURE CONTROL ACTUATOR

DESCRIPTION

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1. Heater unit includes mode control actuator and temperature control actuator.

2. Temperature control actuator is located at the heater unit. It regulates the temperature by the procedure asfollows. Signal from control unit adjusts position of temperature door by operating temperature switchand then temperature will be regulated by the hot/cold air ratio decided by position of temperature door.

INSPECTION

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 theterminal 3 and grounding terminal 4.

Verify that the temperature control actuator operates to the cool position when connecting in the reverse.

Fig. 12: Temperature Control Actuator Circuit

4. Check the voltage between terminals 6 and 7.

SPECIFICATION

DOOR POSITION CHART

5. If the measured voltage is not specification, substitute with a known-good temperature control actuatorand check for proper operation.

6. If the problem is corrected, replace the temperature control actuator.

REPLACEMENT

Door position Voltage (6-7) Error detecting

Max. cooling 0.3 0.15V Low voltage: 0.1V or less

Max. heating 4.7 0.15V High voltage: 4.9V or more

* It will feedback current position of actuator to controls.

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2. Remove the luggage side trim. Refer to LUGGAGE SIDE TRIM REPLACEMENT.

3. Remove the rear heater unit. Refer to HEATER UNIT.

4. Disconnect the temperature control actuator connector.

5. Loosen the mounting screw and then remove the temperature control actuator (B).

Fig. 13: Identifying Temperature Control Actuator


REAR MODE CONTROL ACTUATOR

INSPECTION

1. Ignition "OFF".

2. Disconnect the connector of mode control actuator.

3. Verify that the mode control actuator operates to the defrost mode when connecting 12V to the terminal 3

and grounding terminal 4.4. Verify that the mode control actuator operates to the vent mode when connecting in the reverse.

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Fig. 14: Mode Control Actuator Circuit

5. Check the voltage between terminals 3 and 4.

DOOR POSITION CHART

REPLACEMENT


2. Remove the rear heater unit. Refer to REPLACEMENT.

3. Disconnect the mode control actuator connector (A).

4. Loosen the mounting screws and then remove the mode control actuator (B).

Fig. 15: Identifying Mode Control Actuator And Connector

Door position Voltage (3-4) Error detecting

Vent 0.3 0.15V Low voltage: 0.1V or less

Defrost 4.7 0.15V High voltage: 4.9V or more

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REAR POWER MOSFET

INSPECTION

1. Ignition "ON".

2. Manually operate the control switch and measure the voltage of blower motor between pin 1 and 2.

3. Select the control switch to raise voltage until high speed.

Fig. 16: Measuring Voltage Of Blower Motor Between Pin 1 And 2

FAN VOLTAGE CHART

REPLACEMENT

FanVoltage

Manual1 STEP 4.5 0.5V

2 STEP 5.7 0.5V

3 STEP 6.9 0.5V

4 STEP 8.1 0.5V

5 STEP 9.3 0.5V

6 STEP 10.5 0.5V

7 STEP Battery (+)*AUTO COOLING: Auto speed (4.5V-B+)

*AUTO HEATING: Auto speed (4.5V-10.5V)

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2. Remove the luggage side trim. Refer to LUGGAGE SIDE TRIM REPLACEMENT.3. Disconnect the power Mosfet connector (A).

4. Remove the power Mosfet (B) after loosening the mounting screws.

Fig. 17: Identifying Power Mosfet And Connector

REAR CONTROL PANEL

COMPONENT

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Fig. 18: Identifying Rear Control Panel Component

REPLACEMENT

2008 Kia Sedona EX


2008 Ki S d EX


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1. Remove the rear control panel (A) and then disconnect the rear control panel connector (B).

Fig. 19: Identifying Rear Heater Control Unit And Connector


2008 Kia Sedona EX


heater rear

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