Kia Sedona (2008 year). Instruction — part 259

1. Ignition "OFF"

2. Disconnect Rear mode Actuator.

3. Measure resistance between terminal "3, 4" of Rear Direction Motor and chassis ground.

Specification: Approx. infinity ohms

Fig. 177: Checking Resistance Between Terminal "3, 4" Of Driver Air Mix Motor And
Chassis Ground
Courtesy of KIA MOTORS AMERICA, INC.

4. Is the measured resistance within specifications?

YES

Go to "VISUAL/PHYSICAL INSPECTION" procedure.

NO

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

VISUAL/PHYSICAL INSPECTION

1. Check actuator.

Check if Rear Direction Actuator works properly through ACTUATION TEST.

1. Ignition: ON

2. Connect scan tool and select "ACTUATION TEST" mode and press [F1]

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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Fig. 178: Diagnosis Function Screen Display - Actuation Test
Courtesy of KIA MOTORS AMERICA, INC.

3. Does Rear Direction Actuator work properly?

YES

Go to "COMPONENT INSPECTION" procedure.

NO

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.

COMPONENT INSPECTION

1. Check actuator.

1. Ignition "OFF"

2. Disconnect Rear 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.

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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Fig. 179: 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 Rear Direction potentiometer.

3. Measure voltage between terminal "5" and "6" of Rear Direction potentiometer as the mode switch

is operated.

Specification: Refer the specifications in DOOR POSITION CHART

Fig. 180: Checking Voltage Between Terminal "5" And "6" Of Intake Potentiometer
Courtesy of KIA MOTORS AMERICA, INC.

DOOR POSITION CHART

Door position

Voltage (5-6)

Error detecting

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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Fig. 181: 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

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.

3. Check A/C Control Unit.

1. Engine: "ON"

2. Connect A/C Control Unit.

3. Measure voltage between terminal "19" and "20" of A/C Control Unit while operating the mode

switch.

Specification :Approx. 12V

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 3:56:09 PM

Page 161

© 2006 Mitchell Repair Information Company, LLC.