Kia Sedona (2008 year). Instruction — part 248

NO

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

GROUND CIRCUIT INSPECTION

1. Check for open in harness.

1. Ignition "OFF"

2. Disconnect Rear Air Mix Potentiometer.

3. Measure resistance between terminal "7" of Rear Air Mix Potentiometer and chassis ground.

Specification: Approx. 0 ohms

Fig. 126: Checking Resistance Between Terminal "7" Of Rear Air Mix Potentiometer 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 B1260.

VERIFICATION OF VEHICLE REPAIR

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.

Refer to DTC B1260.

DTC B1262 DIRECTION POTENTIOMETER OPEN (LOW) - REAR

COMPONENT LOCATION

Fig. 127: Identifying Mode Control Actuator Component Location
Courtesy of KIA MOTORS AMERICA, INC.

GENERAL DESCRIPTION

The mode control actuator mounted on heater unit, adjusts position of mode door by operating Direction Motor
based on signal of A/C control unit. Pressing mode select switch makes the mode control actuator shift in order
of vent --> B/L --> floor --> mix.

DTC DESCRIPTION

The A/C controller sets DTC B1262 if there is an open circuit or poor connection in the Direction
potentiometer.

DTC DETECTING CONDITION

DTC DETECTING CONDITION CHART

Item

Detecting Condition

Possible cause

DTC Strategy



Voltage check



Poor connection of
connected part



Open circuit in harness



Short circuit in harness



Faulty driver direction
potentiometer

Threshold value



< 0.1V

Detecting time



0.3 sec

FAIL SAFE



Fix vent position, while
selecting vent mode.



Fix defrost position while
selecting except vent mode.

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.

SPECIFICATION

Fig. 128: Output Voltage Graph
Courtesy of KIA MOTORS AMERICA, INC.

MONITOR SCAN TOOL DATA

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

2. Engine "ON"

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

Fig. 129: Diagnosis Function Screen Display - Direction Potentiometer Rear
Courtesy of KIA MOTORS AMERICA, INC.

4. Are the DTC B1262 present and is parameter of "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.

2008 Kia Sedona EX

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

Microsoft

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

Page 116

© 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

1. Many malfunctions in the electrical system are caused by poor harness and terminals.

Faults can also be caused by interference from other electrical systems, and mechanical or chemical
damage.

2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination,

deterioration, or damage.

3. Has a problem been found?

YES

Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR" procedure.

NO

Go to "SIGNAL CIRCUIT INSPECTION" procedure.

SIGNAL CIRCUIT INSPECTION

1. Check for open in harness.

1. Ignition "OFF"

2. Disconnect Rear mode Actuator.

3. Measure resistance between terminal "6" of Rear Direction potentiometer and terminal "10" of A/C

control unit.

Specification: Approx. 0 ohms

2008 Kia Sedona EX

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

Microsoft

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

Page 117

© 2006 Mitchell Repair Information Company, LLC.