Kia Sedona (2008 year). Manual - part 254

1. Ignition "OFF"  

2. Disconnect Driver Air Mix Actuator.  

3. Measure resistance between terminal "3, 4" of Driver Air Mix Motor and chassis ground. 

Specification: Approx. infinity ohms 

Fig. 154: Checking Resistance Between Terminal "3, 4" Of Driver Air Mix Motor And 
Chassis Ground 
Courtesy of KIA MOTORS AMERICA, INC. 

4. Is the measured resistance within specifications? 

YES  

Go to "VISUAL/PHYSICAL INSPECTION" procedure. 

NO  

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

VISUAL/PHYSICAL INSPECTION 

1. Check actuator. 

Check if Driver Air Mix Actuator works properly through ACTUATION TEST. 

1. Ignition: ON  

2. Connect scan tool and select" ACTUATION TEST" mode and press [F1] 

 

2008 Kia Sedona EX 

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

  

Microsoft 

 

Monday, May 24, 2010 3:56:09 PM

Page 138 

© 2006 Mitchell Repair Information Company, LLC. 

Fig. 155: Diagnosis Function Screen Display - Actuation Test 
Courtesy of KIA MOTORS AMERICA, INC. 

3. Does Driver Air Mix Actuator work properly? 

YES  

Go to "COMPONENT INSPECTION" procedure. 

NO  

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. 

COMPONENT INSPECTION 

1. Check actuator motor. 

1. Ignition "OFF"  

2. Disconnect Driver 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. 

 

2008 Kia Sedona EX 

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

  

Microsoft 

 

Monday, May 24, 2010 3:56:09 PM

Page 139 

© 2006 Mitchell Repair Information Company, LLC. 

Fig. 156: Checking Terminal 3 And Grounding Terminal 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 Driver Air Mix potentiometer.  

3. Measure voltage between terminal "5" and "6" of Driver Air Mix potentiometer while operating the 

temp, switch. 

Specification: Refer the specifications in DOOR POSITION CHART) 

Fig. 157: Checking Voltage Between Terminal "5" And "6" Of Intake Potentiometer 
Courtesy of KIA MOTORS AMERICA, INC. 

DOOR POSITION CHART 

Door position

Voltage (3-4)

Error detecting

 

2008 Kia Sedona EX 

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

  

Microsoft 

 

Monday, May 24, 2010 3:56:09 PM

Page 140 

© 2006 Mitchell Repair Information Company, LLC. 

Fig. 158: 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. 

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. 

3. Check A/C Control Unit. 

1. Engine "ON"  

2. Connect A/C Control Unit.  

3. Measure voltage between terminal "1" and "2" of A/C Control Unit while operating the temp, 

switch. 

Specification :Approx. 12V 

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 3:56:09 PM

Page 141 

© 2006 Mitchell Repair Information Company, LLC.