Kia Sedona (2008 year). Instruction — part 255

Fig. 159: Checking Voltage Between Terminal "1" And "2" 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

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 DTC s present?

YES

Go to the applicable troubleshooting procedure.

NO

System is performing to specification at this time.

DTC B2408 INTAKE MOTOR FAILURE

2008 Kia Sedona EX

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

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COMPONENT LOCATION

Fig. 160: Identifying Intake Actuator Component Location
Courtesy of KIA MOTORS AMERICA, INC.

GENERAL DESCRIPTION

Refer to DTC B1208.

DTC DESCRIPTION

The A/C controller sets DTC B2408 if the intake motor Doesn't move to intended position within 40sec (The
A/C controller attempts to move the intake door for a 2 second duration at a frequency of 3 times every 20
seconds before storing a DTC.)

DTC DETECTING CONDITION

DTC DETECTING CONDITION CHART

SPECIFICATION

Refer to DTC B1208.

MONITOR SCAN TOOL DATA

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

2. Engine "ON"

Item

Detecting Condition

Possible cause

DTC Strategy



Voltage check



Poor connection of connected part



Open circuit in harness



Short circuit in harness



Faulty Intake potentiometer

Threshold value



< 0.1V

Detecting time



0.3 sec

FAIL SAFE

-

2008 Kia Sedona EX

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

Microsoft

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3. Monitor the "Intake Potentiometer" Parameter on the scan tool while operating Intake switch.

Fig. 161: Diagnosis Function Screen Display - Intake Sensor
Courtesy of KIA MOTORS AMERICA, INC.

4. Are the DTC B2408 present and is parameter of "Intake Potentiometer" fixed?

There is any fault in Intake potentiometer. If the parameter of "Intake potentiometer" is 30% or less when
the actuator operates to the fresh position, or If the parameter is 60% and more when the actuator operates
to the recirculation position.

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 B1208.

SIGNAL CIRCUIT INSPECTION

1. Check for open in harness.

1. Ignition "OFF"

2008 Kia Sedona EX

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

Microsoft

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2. Disconnect Intake potentiometer.

3. Measure resistance between terminal "3, 4" of Intake potentiometer and terminal "7, 8" of A/C

control unit.

Specification: Approx. 0 ohms

Fig. 162: Checking Resistance Between Terminal "3, 4" Of Intake Potentiometer And
Terminal "7, 8" 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 Actuator.

3. Measure resistance between terminal "3, 4" of Driver Air Mix Motor and chassis ground.

Specification: Approx. infinity ohms

2008 Kia Sedona EX

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

Microsoft

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

Page 145

© 2006 Mitchell Repair Information Company, LLC.