Kia Sedona (2008 year). Manual - part 259

1. Ignition "OFF"  

2. Disconnect Rear mode Actuator.  

3. Measure resistance between terminal "3, 4" of Rear Direction Motor and chassis ground. 

Specification: Approx. infinity ohms 

Fig. 177: 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 Rear Direction 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 158 

© 2006 Mitchell Repair Information Company, LLC. 

Fig. 178: Diagnosis Function Screen Display - Actuation Test 
Courtesy of KIA MOTORS AMERICA, INC. 

3. Does Rear Direction 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. 

1. Ignition "OFF"  

2. Disconnect Rear Direction potentiometer.  

3. Verify that the mode actuator operates to the vent mode when connecting 12V to the terminal "3" 

and grounding terminal "4".  

4. Verify that the mode actuator operates to the def mode 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 159 

© 2006 Mitchell Repair Information Company, LLC. 

Fig. 179: 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 Rear Direction potentiometer.  

3. Measure voltage between terminal "5" and "6" of Rear Direction potentiometer as the mode switch 

is operated. 

Specification: Refer the specifications in DOOR POSITION CHART 

Fig. 180: Checking Voltage Between Terminal "5" And "6" Of Intake Potentiometer 
Courtesy of KIA MOTORS AMERICA, INC. 

DOOR POSITION CHART 

Door position

Voltage (5-6)

Error detecting

 

2008 Kia Sedona EX 

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

  

Microsoft 

 

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

Page 160 

© 2006 Mitchell Repair Information Company, LLC. 

Fig. 181: Output Voltage 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 "19" and "20" of A/C Control Unit while operating the mode 

switch. 

Specification :Approx. 12V 

VENT

0.3 ± 0.15V

Under voltage: 

0.08V or less 

Over voltage: 4.92V 

or more

BI-LEVEL(1)

1.35 ± 0.4V

BI-LEVEL(2)

2.25 ± 0.4V

FLOOR

3.0 ± 0.4V

MIX

3.6 ± 0.4V

DEF

4.7 ± 0.15V

 

2008 Kia Sedona EX 

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

  

Microsoft 

 

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

Page 161 

© 2006 Mitchell Repair Information Company, LLC.