Kia Sedona (2008 year). Instruction — part 240

Fig. 89: 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 "Driver Air Mix Potentiometer" Parameter on the scan tool while operating temp, switch.

Fig. 90: Diagnosis Function Screen Display - Air Mix Potentiometer
Courtesy of KIA MOTORS AMERICA, INC.

4. Are the DTC B1245 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
any value below 10%), if there is any fault in Driver Air Mix potentiometer.

YES

Go to TERMINAL AND CONNECTOR INSPECTION procedure.

2008 Kia Sedona EX

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

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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 Driver Air Mix potentiometer.

3. Measure resistance between terminal "6" of Driver Air Mix Potentiometer and terminal "3" of A/C

control unit.

Specification: Approx. 0 ohms

2008 Kia Sedona EX

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

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

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Fig. 91: Checking Resistance Between Terminal "6" Of Driver Air Mix Potentiometer And
Terminal "3" Of A/C Control Unit
Courtesy of KIA MOTORS AMERICA, INC.

4. Is the measured resistance within specifications?

YES

Go to step 2.

NO

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

2. Check for short to ground in harness.

1. Ignition "OFF"

2. Disconnect Driver Air Mix potentiometer.

3. Measure resistance between terminal "6" of Driver Air Mix Potentiometer and chassis ground.

Specification: Approx. infinity ohms

Fig. 92: Checking Resistance Between Terminal "6" Of Driver Air Mix Potentiometer And
Chassis Ground

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.

Courtesy of KIA MOTORS AMERICA, INC.

4. Is the measured resistance within specifications?

YES

Go to "POWER CIRCUIT INSPECTION" procedure.

NO

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

POWER SUPPLY CIRCUIT INSPECTION

1. Check for short or open in harness.

1. Ignition "ON"

2. Connect Driver Air Mix Potentiometer.

3. Measure voltage between terminal "7" of Driver Air Mix Potentiometer and chassis ground.

Specification: Approx. 5V

Fig. 93: Checking Voltage Between Terminal "7" Of Driver Air Mix Potentiometer And
Chassis Ground
Courtesy of KIA MOTORS AMERICA, INC.

4. Is the measured voltage within specifications?

YES

Go to "COMPONENT INSPECTION" procedure.

NO

Check for short or open in power harness. Repair as necessary and go to "VERIFICATION OF

2008 Kia Sedona EX

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

Microsoft

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

Page 85

© 2006 Mitchell Repair Information Company, LLC.