Kia Sedona (2008 year). Instruction — 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

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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

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© 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.