Kia Sedona (2008 year). Instruction — 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

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© 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

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© 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.