Kia Sedona (2008 year). Instruction — part 252

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 Air Mix Actuator works properly through ACTUATION TEST.

1. Ignition: ON

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

Fig. 145: Diagnosis Function Screen Display - Actuation Test
Courtesy of KIA MOTORS AMERICA, INC.

3. Does Driver Air Mix Actuator work properly?

YES

Go to "COMPONENT INSPECTION" procedure.

NO

2008 Kia Sedona EX

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

Microsoft

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Page 130

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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 motor.

1. Ignition "OFF"

2. Disconnect Rear Air Mix Potentiometer.

3. Verify that the temperature actuator operates to the hot position when connecting 12V to the

terminal "3" and grounding terminal "4".

4. Verify that the temperature actuator operates to the cool position when the connections are

reversed.

Fig. 146: 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 Air Mix potentiometer.

3. Measure voltage between terminal "6" and "7" of Rear Air Mix potentiometer while operating the

temp, switch.

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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Specification: Refer the specifications in DOOR POSITION CHART)

Fig. 147: Checking Voltage Between Terminal "6" And "7" Of Driver Direction
Potentiometer
Courtesy of KIA MOTORS AMERICA, INC.

DOOR POSITION CHART

Fig. 148: 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.

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 3:56:09 PM

Page 132

© 2006 Mitchell Repair Information Company, LLC.

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 "4" and "5" of A/C Control Unit while operating the temp,

switch.

Specification :Approx. 12V

Fig. 149: Checking Voltage Between Terminal "4" And "5" Of A/C Control Unit
Courtesy of KIA MOTORS AMERICA, INC.

4. Is the measured voltage within specifications?

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 A/C Control Unit and check for proper operation.

If the problem is corrected, replace A/C Control Unit and then go to "VERIFICATION OF
VEHICLE REPAIR" procedure.

VERIFICATION OF VEHICLE REPAIR

2008 Kia Sedona EX

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

Microsoft

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

Page 133

© 2006 Mitchell Repair Information Company, LLC.