Kia Sedona (2008 year). Instruction — part 250

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 B1263 DIRECTION POTENTIOMETER SHORT (HIGH) - REAR

COMPONENT LOCATION

Fig. 136: Identifying Mode Control Actuator Component Location
Courtesy of KIA MOTORS AMERICA, INC.

GENERAL DESCRIPTION

Refer to DTC B1262.

DTC DESCRIPTION

2008 Kia Sedona EX

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

Microsoft

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The A/C controller sets DTC B1263 if there is a short to power in the Direction potentiometer.

DTC DETECTING CONDITION

DTC DETECTING CONDITION CHART

SPECIFICATION

Refer to DTC B1262.

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

4. Are the DTC B1263 present and is parameter of "DIRECTION POTENTIO." fixed?

Parameter of "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 3:56:09 PM

Page 123

© 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 B1262.

SIGNAL CIRCUIT INSPECTION

1. Check for short in harness.

1. Ignition "OFF"

2. Disconnect Rear mode Actuator.

3. Measure resistance between terminal "6" and "7" of Rear Direction potentiometer.

Specification: Approx. infinity ohms

Fig. 138: Checking Resistance Between Terminal "6" And "7" Of Rear Direction
Potentiometer
Courtesy of KIA MOTORS AMERICA, INC.

4. Is the measured resistance within specifications?

YES

Go to "GROUND CIRCUIT INSPECTION" procedure.

NO

2008 Kia Sedona EX

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

Microsoft

Monday, May 24, 2010 3:56:09 PM

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© 2006 Mitchell Repair Information Company, LLC.

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

GROUND CIRCUIT INSPECTION

1. Check for open in ground harness.

1. Ignition "OFF"

2. Disconnect Rear mode Actuator.

3. Measure resistance between terminal "5" of evaporator sensor and chassis ground.

Specification :Approx. 0 ohms

Fig. 139: Checking Resistance Between Terminal "5" Of Evaporator Sensor And Chassis
Ground
Courtesy of KIA MOTORS AMERICA, INC.

4. Is the measured resistance within specifications?

YES

Go to "COMPONENT INSPECTION" procedure.

NO

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

COMPONENT INSPECTION

Refer to DTC B1262.

VERIFICATION OF VEHICLE REPAIR

Refer to DTC B1262.

2008 Kia Sedona EX

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

Microsoft

Monday, May 24, 2010 3:56:09 PM

Page 125

© 2006 Mitchell Repair Information Company, LLC.