Kia Carnival (2009+). Manual — part 488

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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 the proper Body Diagnostic Procedures manual. 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 power tailgate system description for list).
Following are quick reference diagnostic tables to help when diagnosing and testing the power tailgate system.

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
Body Diagnostic Manual 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 wiring diagrams

Power loss during Tailgate
operation

Wiring problems (system or vehicle)

Troubleshoot using electrical schematics.
Refer to wiring diagrams

Battery voltage at PTGM is too low

Check for proper voltage at the PTGM
Charge battery

Failure of Power Tailgate or Body
Control Module

Check for diagnostic trouble codes with
SCAN tool

Failure of motor assembly

Test motor assembly

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

No power latching in
primary and/or secondary
positions

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 brainplate.

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

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
Body Diagnostic Manual for detailed
procedures

Check for foreign matter preventing the
operation of motor assembly

Check wire connections

Failure of tailgate motor assembly

Motor clutch does not engage, replace
assembly

Full open switch inoperative, replace switch, if
necessary

Troubleshoot using Body Diagnostic Manual
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 Body Diagnostic Manual
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 wiring diagrams

Tailgate continues to power
open

Failure of PTGM or BCM

Check for diagnostic trouble codes and cycle,
see Body Diagnostic Manual for detailed
procedures

Failure of motor assembly

Check for continuous drive condition

Wiring problems (system or vehicle)

Troubleshoot using electrical schematics
Refer to Wiring Diagrams

Tailgate opens very slowly

Battery voltage at PTGM is too low

Check for proper voltage at the PTGM
Charge battery

Failure of tailgate gas struts

Replace gas struts, if necessary

Binding or sticking of components

Establish location of binding and replace
necessary components

Grade of vehicle too steep for power
operation

Operate tailgate manually

Failure of tailgate motor assembly

Replace motor assembly, if necessary

Squeaks, Noises and rattles

Foreign material in tail gate
compartment

Remove foreign material

Worn/Loose components

Check and tighten loose components

DTC LIST

DTC CODE

DISPLAY

B1101

Battery Voltage High

B1102

Battery Voltage Low