Kia Sedona (2008 year). Instruction — part 490

1. Vehicle condition

Moving



(IGN=OFF and Vehicle Speed > 5 km/h) or (IGN= ON and (Vehicle Speed > 5 km/h or TRANS -
not P/N))

Not moving



(IGN=OFF and Vehicle Speed < 5 km/h) or (IGN= ON and (Vehicle Speed < 5 km/h and TRANS -
P/N))

2. TAILGATE TRAVEL ZONES

The Tailgate travel is divided into four zones starting at the full closed and latched position. Dimensions
are at the bottom edge of the Tailgate and are approximate.

Zone 1: Power Latching - from primary to secondary latch (0 to 10 mm depending on latch travel).

Zone 2: Between Secondary and Crossover Point (Secondary to 20 degrees)

Zone 3: Between Crossover Point and Power Off (20 degrees to 79 degrees)

Zone 4: Power Off to Full Open - approximately 5° (15 counts from full open)

DIAGNOSIS AND TESTING - POWER TAILGATE SYSTEM

The power tailgate system is a complex system containing many components. In order to perform conclusive
testing, or receive outputs the power tailgate control module must be checked.

The most reliable, efficient, and accurate means to diagnose the power tailgate system requires the use of a scan
tool and using the BCM (BODY CONTROL MODULE) .

ON

Any

•

•

•

X

Moving

1 or 2

ON/OFF

Any

X (Chime 1

T)

X (Chime 1

T)

X (Chime 1

T)

X

3 or 4

OFF

Any

•

•

X (Chime 1

T)

X

ON

Any

•

•

•

X

Closing

ON

Any

•

•

•

X

Opening 1 or

2

OFF

Any

X

X

X

X

ON

Any

X

X

X

X

Opening 3 or

4

OFF

Any

•

•

X

X

ON

Any

•

•

•

X

Any

Any

ON/OFF

Any

Manual Move

2008 Kia Sedona EX

2008 ACCESSORIES & BODY, CAB Power Tailgate System - Sedona

Microsoft

Monday, May 24, 2010 4:16:59 PM

Page 7

© 2006 Mitchell Repair Information Company, LLC.

The scan tool can be used to observe current switch status recorded in the power tailgate control module to help
the technician diagnose an inoperative switch.

Before any testing of the power tailgate system is attempted, the battery should be fully charged, all power
tailgate system inhibitors read and understood (Refer to DESCRIPTION for list).

Following are quick reference diagnostic tables to help when diagnosing and testing the power tailgate system.

DIAGNOSTIC TROUBLE CODE CHART

CONDITION

POSSIBLE CAUSES

CORRECTION

Tailgate opens
unexpectedly

Accidental activation or
Failure of open/close
command switch

Check for shorted or defective switch

Failure of latch assembly

Check wiring connections
Check for trouble codes, replace latch if necessary

Failure of Power
Tailgate or Body Control
module

Disconnect then reconnect battery or fuse to reset
module, function tailgate, if no function exists
check for loose wire connections, See for detailed
procedures

Tailgate will not power
open or close

Not in Park or false
indication

Check switch status with SCAN tool

Battery voltage at PTGM
is too low

Check for proper voltage at the PTGM Charge
battery

Blown fuse

Check for blown fuse

Gas strut failure

Check condition of tailgate gas struts

BCM or tailgate control
module critical fault
codes

Check code status with SCAN tool

Failure of latch assembly

Check wire connections and for blown fuse
Check for foreign matter preventing the operation
of latch assembly

Tailgate will not power
open or close

Failure of motor
assembly

Test motor assembly

Binding or sticking of
components

Establish location of binding and replace necessary
components

Wiring problems (system
or vehicle)

Troubleshoot using electrical schematics Refer to
appropriate SYSTEM WIRING DIAGRAMS
article.

Power loss during Tailgate
operation

Wiring problems (system
or vehicle)

Troubleshoot using electrical schematics. Refer to
appropriate SYSTEM WIRING DIAGRAMS
article.

Battery voltage at PTGM
is too low

Check for proper voltage at the PTGM Charge
battery

Failure of Power

2008 Kia Sedona EX

2008 ACCESSORIES & BODY, CAB Power Tailgate System - Sedona

Microsoft

Monday, May 24, 2010 4:16:59 PM

Page 8

© 2006 Mitchell Repair Information Company, LLC.

Tailgate or Body Control
Module

Check for diagnostic trouble codes with SCAN tool

Failure of motor
assembly

Test motor assembly

No power latching in
primary and/or secondary
positions

Failure of latch assembly

Check wire connections and for blown fuse
Check for diagnostic trouble codes and cycle with
SCAN tool
Troubleshoot using Body Diagnostic Manual.
Replace latch assembly, if necessary

Binding or sticking of
components

Establish location of binding and replace necessary
components

Failure of Power
Tailgate or Body Control
Module

Check for diagnostic trouble codes with scan tool

Tail Gate seal force too
high

Inspect seals for damage, mis-assembly, foreign
matter or other possible obstruction

Failure of motor
assembly

Test motor assembly

Latch will not release from
primary position

Not in Park or false
indication

Check switch status with SCAN tool

Battery voltage at PTGM
is too low

Check for proper voltage at the PTGM Charge
battery

Blown fuse

Check fuse and replace if required

Failure of latch assembly Check switch status with scan tool

Check for foreign matter or damaged components
preventing the operation of latch assembly

Troubleshoot using body diagnostic manual.
Replace latch assembly, if necessary

Failure of outside handle
connection

Check handle of drain plate.

Failure of Power
Tailgate or Body Control
Module

Check for diagnostic trouble codes and cycle with
scan tool

Binding or sticking of
components

Establish location of binding and replace necessary
components

Key fob or overhead
console switch does not
power operate tailgate

Blown Fuse

Check fuse and replace

Battery voltage at PTGM
is too low

Check for proper voltage at the PTGM Charge
battery

Does Not Power Unlatch

Failure of latch assembly

Check for foreign matter preventing the operation
of latch assembly
Check for diagnostic trouble codes and cycle with
scan tool
Check pawl and/or ratchet switch with SCAN tool
Troubleshoot using body diagnostic manual

2008 Kia Sedona EX

2008 ACCESSORIES & BODY, CAB Power Tailgate System - Sedona

Microsoft

Monday, May 24, 2010 4:16:59 PM

Page 9

© 2006 Mitchell Repair Information Company, LLC.

Does Not Power Unlatch

Failure of Power
Tailgate Module

Troubleshoot using body diagnostic manual

Failure of Body Control
Module (BCM)

Troubleshoot using body diagnostic manual
Replace BCM if necessary

Failure of RAM

Replace RAM if necessary

Failure of key fob

Reprogram key fob
Replace key fob if necessary

Failure of Power
Tailgate Module

Check for diagnostic trouble codes with scan tool,
See for detailed procedures

Failure of tailgate motor
assembly

Check for foreign matter preventing the operation
of motor assembly
Check wire connections
Motor clutch does not engage, replace assembly
Full open switch inoperative, replace switch, if
necessary
Troubleshoot using Replace motor, if necessary

Tailgate does not stay open

Failure of tailgate gas
struts

Replace gas struts
Check for broken attachments

High inside/outside
opening effort

Failure of tailgate gas
struts

Replace gas struts
Check for broken attachments

Drive unit jammed or did
not disengage

Troubleshoot using Replace components, if
necessary

Binding or sticking of
components

Establish location of binding and replace necessary
components

Tailgate continues to cinch
closed

Failure of latch assembly

Check wire connections and for blown fuse Check
switches with SCAN tool

Tail gate continues to
power close

Failure of latch assembly

Check wire connections
Check for foreign matter
Troubleshoot using Body Diagnostic Manual

Control Module

Check for diagnostic trouble codes with Scan tool

Wiring problems (system
or vehicle)

Troubleshoot using electrical schematics Refer to
appropriate SYSTEM WIRING DIAGRAMS
article.

Tailgate continues to
power open

Failure of PTGM or
BCM

Check for diagnostic trouble codes and cycle, See
for detailed procedures

Failure of motor
assembly

Check for continuous drive condition

Wiring problems (system
or vehicle)

Troubleshoot using electrical schematics Refer to
appropriate SYSTEM WIRING DIAGRAMS
article.

Battery voltage at PTGM
is too low

Check for proper voltage at the PTGM Charge
battery

Failure of tailgate gas

2008 Kia Sedona EX

2008 ACCESSORIES & BODY, CAB Power Tailgate System - Sedona

Microsoft

Monday, May 24, 2010 4:16:59 PM

Page 10

© 2006 Mitchell Repair Information Company, LLC.