Kia Sedona (2008 year). Manual - 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

  

Microsoft 

 

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

Page 142 

© 2006 Mitchell Repair Information Company, LLC. 

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 

 

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

Page 143 

© 2006 Mitchell Repair Information Company, LLC. 

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 

 

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

Page 144 

© 2006 Mitchell Repair Information Company, LLC. 

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.