Kia Sorento: Troubleshooting

Second Generation XM (2011-2025) / Kia Sorento XM 2011-2025 Service Manual / Body Electrical System / Power Tailgate Module / Troubleshooting

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 GDS. The GDS 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
	Failure of latch assembly	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
	Failure of latch assembly	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
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 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
	Failure of Body Control Module (BCM)	Replace BCM if necessary
	Failure of key fob	Reprogram key fob
	Failure of 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
	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 Body Diagnostic Manual Replace motor, if necessary
Tailgate does not stay open	Failure of tailgate gas struts	Replace gas struts
Tailgate does not stay open	Failure of tailgate gas struts	Check for broken attachments
High inside/outside opening effort	Failure of tailgate gas spindle	Replace gas spindle
	Failure of tailgate gas spindle	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
Squeaks, Noises and rattles	Worn/Loose components	Check and tighten loose components

Operation

Power Tailgate Opening ** - Primary switch signal received by PTGM via CAN bus (sent by IPM) PTGM Opening procedure: 1. Opening can be triggered after a signal i ...

Power Tailgate Unit Circuit Diagram

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Kia Sorento: Troubleshooting

Operation

Power Tailgate Unit Circuit Diagram

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