Kia Sedona (2008 year). Manual - part 291

Fig. 5: Identifying Open Circuit Point 
Courtesy of KIA MOTORS AMERICA, INC. 

5. Use an ohmmeter to measure the resistance of each heater line between a terminal and the center of a grid 

line, and between the same terminal and the center of one adjacent heater line. The section with a broken 
heater line will have a resistance twice as that in other sections. In the affected section, move the test lead 
to a position where the resistance sharply changes. 

Fig. 6: Measuring Heater Grid Resistance 
Courtesy of KIA MOTORS AMERICA, INC. 

REPAIR OF BROKEN HEATER LINE 

Prepare the following items: 

1. Conductive paint.  

2. Paint thinner.  

3. Masking tape.  

4. Silicone remover.  

5. Using a thin brush : 

 

2008 Kia Sedona EX 

2008 ACCESSORIES & BODY, CAB Rear Window Defogger - Sedona

  

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Wipe the glass adjacent to the broken heater line, clean with silicone remover and attach the masking tape 
as shown in illustration. See Fig. 7. Shake the conductive paint container well, and apply three coats with 
a brush at intervals of about 15 minutes apart. Remove the tape and allow sufficient time for drying 
before applying power. For a better finish, scrape away excess deposits with a knife after the paint has 
completely dried (Allow 24 hours). 

Fig. 7: Attaching Masking Tape 
Courtesy of KIA MOTORS AMERICA, INC. 

REAR WINDOW DEFOGGER SWITCH 

INSPECTION 

1. Disconnect the negative (-) battery terminal.  

2. Remove the center fascia panel, console lower cover and center air vent (A) after loosening screws. Take 

care not to damage fixing clips. 

Fig. 8: Identifying Center Air Vent 
Courtesy of KIA MOTORS AMERICA, INC.

 

2008 Kia Sedona EX 

2008 ACCESSORIES & BODY, CAB Rear Window Defogger - Sedona

  

Microsoft 

 

Monday, May 24, 2010 4:13:22 PM

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© 2006 Mitchell Repair Information Company, LLC. 

3. Remove the center fascia panel switch and air control panel (A) after loosening screws. 

Fig. 9: Identifying Tray And Heater Control Panel 
Courtesy of KIA MOTORS AMERICA, INC. 

4. Disconnect the air control panel connector (A). 

Fig. 10: Identifying Air Control Panel Connector 
Courtesy of KIA MOTORS AMERICA, INC. 

5. Installation is the reverse of removal.  

REAR WINDOW DEFOGGER TIMER 

INSPECTION 

While operating the components, check whether the operations are normal as shown in the timing chart. See 
Fig. 11. 

 

2008 Kia Sedona EX 

2008 ACCESSORIES & BODY, CAB Rear Window Defogger - Sedona

  

Microsoft 

 

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© 2006 Mitchell Repair Information Company, LLC. 

1. The defog function can be activated only when engine is running and ignition key is in RUN position. 

If the defogger is switched ON, the defogger will stay ON for 20 minutes duration. 

While Windshield Defog is on, the windshield defog button is illuminated 

If the switch is pushed again while defog is already active, defog stops. 

If the engine stops while defog is on, defog stops and it is not automatically turned on when the engine is 
started again. 

Rear defog works exactly in the same way as windshield defog using the Rear Defog Switch button as 
input. 

Fig. 11: Rear Defog Flashing Pattern 
Courtesy of KIA MOTORS AMERICA, INC. 

2. Rear Defog Pause 

When IPM receives tailgate flasher control CAN message transition to tailgate flash value, rear defog is 
inhibited for 30 seconds. 

The 20 min. rear defog timer is frozen during this pause. 

If the user turns on rear defog function while this pause is going on, rear defog is set to ON only at the 
end of the pause. 

This pause has no impact on Rear Defog Switch illumination. 

When IPM receives tailgate open CAN message transition to OPEN value, this 30-second rear defog 
pause is also started, it works the same way as described above.

 

2008 Kia Sedona EX 

2008 ACCESSORIES & BODY, CAB Rear Window Defogger - Sedona

  

Microsoft 

 

Monday, May 24, 2010 4:13:22 PM

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© 2006 Mitchell Repair Information Company, LLC.