Kia Sedona (2008 year). Manual - part 244

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

COMPONENT INSPECTION 

1. Check actuator. 

1. Ignition "OFF"  

2. Disconnect Driver 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. 

Fig. 107: 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 Direction potentiometer.  

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

switch is operated. 

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 98 

© 2006 Mitchell Repair Information Company, LLC. 

Fig. 108: Checking Voltage Between Terminal "5" And "6" Of Intake Potentiometer 
Courtesy of KIA MOTORS AMERICA, INC. 

DOOR POSITION CHART 

Fig. 109: 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. 

Door position

Voltage (5-6)

Error detecting

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 3:56:08 PM

Page 99 

© 2006 Mitchell Repair Information Company, LLC. 

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. 

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 B1250 DIRECTION POTENTIOMETER SHORT (HIGH) - DRIVER 

COMPONENT LOCATION 

Fig. 110: Identifying Mode Control Actuator (Driver's) Component Location 
Courtesy of KIA MOTORS AMERICA, INC. 

GENERAL DESCRIPTION 

Refer to DTC B1249. 

DTC DESCRIPTION 

 

2008 Kia Sedona EX 

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

  

Microsoft 

 

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

Page 100 

© 2006 Mitchell Repair Information Company, LLC. 

The A/C controller sets DTC B1250 if there is a short to power in the Direction potentiometer. 

DTC DETECTING CONDITION 

DTC DETECTING CONDITION CHART 

SPECIFICATION 

Refer to DTC B1249. 

MONITOR SCAN TOOL DATA 

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

2. Engine "ON"  

3. Monitor the "DR. DIRECTION POTENTIO." parameter on the scan tool while operating mode switch. 

Fig. 111: Diagnosis Function Screen Display - Direction Potentiometer 
Courtesy of KIA MOTORS AMERICA, INC. 

4. Are the DTC B1250 present and is parameter of "DR. DIRECTION POTENTIO." fixed? 

Parameter of "DR. DIRECTION POTENTIO." will be fixed at 100% (or any value above 90%), or 0% 
(or any value below 10%), if there is any fault in Driver Direction potentiometer. 

Item

Detecting Condition

Possible cause

DTC Strategy



Voltage check  



Short circuit in harness  



Faulty driver direction potentiometer  



Open circuit in harness  

Threshold value



> 4.9V  

Detecting time



0.3 sec  

FAIL SAFE



Fix vent position  

 

2008 Kia Sedona EX 

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

  

Microsoft 

 

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

Page 101 

© 2006 Mitchell Repair Information Company, LLC.