Kia Sedona (2008 year). Manual - part 225

Fig. 24: Checking Resistance Between A/C Control Unit Terminals 
Courtesy of KIA MOTORS AMERICA, INC. 

4. Is the measured resistance within specifications? 

YES  

Go to step 2. 

NO  

Check for open in signal harness. Repair as necessary and go to "VERIFICATION OF 
VEHICLE REPAIR" procedure. 

2. Check for short to ground in harness. 

1. Ignition "OFF"  

2. Disconnect Passenger's Air Mix potentiometer.  

3. Measure resistance between terminal "7" of Passenger's Air Mix Potentiometer and chassis ground. 

Specification: Approx. infinity ohms 

Fig. 25: Checking Resistance Between Passenger Air Mix Potentiometer And Chassis Ground
Courtesy of KIA MOTORS AMERICA, INC. 

4. Is the measured resistance within specifications? 

 

2008 Kia Sedona EX 

2008 HVAC Blower & A/C Controls (Automatic) - Sedona

  

Microsoft 

 

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© 2006 Mitchell Repair Information Company, LLC. 

YES  

Go to "POWER CIRCUIT INSPECTION" procedure. 

NO  

Check for short to ground in signal harness. Repair as necessary and go to "VERIFICATION OF 
VEHICLE REPAIR" procedure. 

POWER SUPPLY CIRCUIT INSPECTION 

1. Check for short or open in harness. 

1. Ignition "ON"  

2. Connect Passenger's Air Mix Potentiometer.  

3. Measure voltage between terminal "5" of Passenger's Air Mix Potentiometer and chassis ground. 

Specification: Approx. 5V 

Fig. 26: Checking Voltage Between Terminal Potentiometer And Chassis Ground 
Courtesy of KIA MOTORS AMERICA, INC. 

4. Is the measured voltage within specifications? 

YES  

Go to "COMPONENT INSPECTION" procedure. 

NO  

Check for short or open in power harness. Repair as necessary and go to "VERIFICATION OF 
VEHICLE REPAIR" procedure. 

COMPONENT INSPECTION 

1. Check actuator motor. 

1. Ignition "OFF"  

 

2008 Kia Sedona EX 

2008 HVAC Blower & A/C Controls (Automatic) - Sedona

  

Microsoft 

 

Monday, May 24, 2010 3:56:07 PM

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© 2006 Mitchell Repair Information Company, LLC. 

2. Disconnect Passenger's Air Mix Potentiometer.  

3. Verify that the temperature actuator operates to the hot position when connecting 12V to the 

terminal "3" and grounding terminal "4".  

4. Verify that the temperature actuator operates to the cool position when the connections are 

reversed. 

Fig. 27: Checking Connector Terminals 3 And 4 
Courtesy of KIA MOTORS AMERICA, INC. 

5. Does the actuator work properly? 

YES  

Go to step 2. 

NO  

Substitute with a known-good actuator and check for proper operation. If the problem is corrected, 
replace actuator and then go to "VERIFICATION OF VEHICLE REPAIR" procedure. 

2. Check potentiometer 

1. Ignition "ON"  

2. Connect Passenger's Air Mix potentiometer.  

3. Measure voltage between terminal "5" and "6" of Passenger's Air Mix potentiometer while 

operating the temp, switch. 

Specification: Refer to DOOR POSITION CHART

 

2008 Kia Sedona EX 

2008 HVAC Blower & A/C Controls (Automatic) - Sedona

  

Microsoft 

 

Monday, May 24, 2010 3:56:07 PM

Page 24 

© 2006 Mitchell Repair Information Company, LLC. 

Fig. 28: Checking Voltage Between Air Mix Potentiometer Terminals 
Courtesy of KIA MOTORS AMERICA, INC. 

DOOR POSITION CHART 

Fig. 29: Air Mix Graph 
Courtesy of KIA MOTORS AMERICA, INC. 

4. Is the measured voltage within specifications in DOOR POSITION CHART? 

YES  

Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, 
or damage. 

Repair or replace as necessary and then go to "VERIFICATION OF VEHICLE REPAIR" 
procedure. 

Door position

Voltage (5-6)

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

 

2008 Kia Sedona EX 

2008 HVAC Blower & A/C Controls (Automatic) - Sedona

  

Microsoft 

 

Monday, May 24, 2010 3:56:07 PM

Page 25 

© 2006 Mitchell Repair Information Company, LLC.