Kia Sedona (2008 year). Manual - part 241

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. 

Fig. 94: 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) 

 

2008 Kia Sedona EX 

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

  

Microsoft 

 

Monday, May 24, 2010 3:56:08 PM

Page 86 

© 2006 Mitchell Repair Information Company, LLC. 

Fig. 95: Checking Voltage Between Terminal "5" And "6" Of Intake Potentiometer 
Courtesy of KIA MOTORS AMERICA, INC. 

DOOR POSITION CHART 

Fig. 96: 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  

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 3:56:08 PM

Page 87 

© 2006 Mitchell Repair Information Company, LLC. 

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. 

VERIFICATION OF VEHICLE REPAIR 

After a repair, it is essential to verify that the fault has been corrected. 

1. Connect scan tool and select "Diagnostic Trouble Codes (DTCs)" mode and then clear DTC.  

2. Operate the vehicle and monitor the DTC on the scan tool.  

3. Are any DTCs present? 

YES  

Go to the applicable troubleshooting procedure. 

NO  

System is performing to specification at this time. 

DTC B1246 AIR MIX POTENTIOMETER SHORT (HIGH) - DRIVER 

COMPONENT LOCATION 

Fig. 97: Identifying Temperature Control Actuator Component Location 
Courtesy of KIA MOTORS AMERICA, INC. 

GENERAL DESCRIPTION 

Refer to DTC B1245. 

DTC DESCRIPTION 

The A/C controller sets DTC B1246 if there is a short to power in the air mix potentiometer. 

 

2008 Kia Sedona EX 

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

  

Microsoft 

 

Monday, May 24, 2010 3:56:08 PM

Page 88 

© 2006 Mitchell Repair Information Company, LLC. 

DTC DETECTING CONDITION 

DTC DETECTING CONDITION CHART 

SPECIFICATION 

Refer to DTC B1245. 

MONITOR SCAN TOOL DATA 

1. Connect scan tool to Data Link Connector (DLC).  

2. Engine "ON"  

3. Monitor the "Driver Air Mix Potentiometer" Parameter on the scan tool while operating temp, switch. 

Fig. 98: Diagnosis Function Screen Display - Air Mix Potentiometer 
Courtesy of KIA MOTORS AMERICA, INC. 

4. Are the DTC B1246 present and is parameter of "Driver Air Mix potentiometer" fixed? 

Parameter of "Driver Air Mix potentiometer" will be fixed at 100% (or any value above 90%), or 0% (or 

Item

Detecting Condition

Possible cause

DTC Strategy



Voltage check  



Short circuit in harness  



Faulty driver Air Mix 
potentiometer  

Threshold value



> 4.9V  

Detecting time



0.3 sec  

FAIL SAFE



If temperature setting 17-24.5°C(63-76°F) 
fix at max. cooling position.  



If temperature setting 25-32°C(77-90°F) fix 
at max. heating position.  

 

2008 Kia Sedona EX 

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

  

Microsoft 

 

Monday, May 24, 2010 3:56:08 PM

Page 89 

© 2006 Mitchell Repair Information Company, LLC.