Kia Sedona (2008 year). Instruction — part 247

Fig. 121: Checking Voltage Between Terminal "6" And "7" Of Driver Direction
Potentiometer
Courtesy of KIA MOTORS AMERICA, INC.

DOOR POSITION CHART

Fig. 122: 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 (6-7)

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 110

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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 B1261 AIR POTENTIOMETER SHORT (HIGH) - REAR

COMPONENT LOCATION

Fig. 123: Identifying Temperature Control Actuator Component Location
Courtesy of KIA MOTORS AMERICA, INC.

GENERAL DESCRIPTION

Refer to DTC B1260.

DTC DESCRIPTION

The A/C controller sets DTC B1261 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 B1260.

MONITOR SCAN TOOL DATA

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

2. Engine "ON"

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

Fig. 124: Diagnosis Function Screen Display - Air Mix Potentiometer (Rear)
Courtesy of KIA MOTORS AMERICA, INC.

4. Are the DTC B1261 present and is parameter of "Rear Air Mix potentiometer" fixed?

Parameter of "Rear Air Mix potentiometer" will be fixed at 100% (or any value above 90%), or 0% (or
any value below 10%), if there is any fault in Rear Air Mix potentiometer.

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 112

© 2006 Mitchell Repair Information Company, LLC.

YES

Go to TERMINAL AND CONNECTOR INSPECTION procedure.

NO

Fault is intermittent caused by poor contact in the sensor's and/or A/C controller's connector or was
repaired and A/C controller memory was not cleared. Thoroughly 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.

TERMINAL AND CONNECTOR INSPECTION

Refer to DTC B1260.

SIGNAL CIRCUIT INSPECTION

1. Check for short in harness.

1. Ignition "OFF"

2. Disconnect Rear Air Mix potentiometer.

3. Measure resistance between terminal "5" and "6" of Rear Air Mix potentiometer.

Specification: Approx. infinity ohms

Fig. 125: Checking Resistance Between Terminal "5" And "6" Of Rear Air Mix
Potentiometer
Courtesy of KIA MOTORS AMERICA, INC.

4. Is the measured resistance within specifications?

YES

Go to "GROUND CIRCUIT INSPECTION" procedure.

2008 Kia Sedona EX

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

Microsoft

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

Page 113

© 2006 Mitchell Repair Information Company, LLC.