Failure Inspection: Notes

Information 

Check whether it is set toe the power tailgate ON or OFF in the USM.

Power tailgate ON (Auto mode)	Power tailgate OFF (Manual mode)
Courtesy of KIA MOTORS AMERICA, INC.	Courtesy of KIA MOTORS AMERICA, INC.

Smart Tailgate system is a complex system that consists of several components. To get an accurate test result, the control module of the Smart Tailgate must be inspected.

The most trustworthy, effective and accurate method is using KDS required by smart tailgate.

KDS helps technicians when inspecting a disabled switch, and enables to check the current status record of the switch of Smart Tailgate control module.

The battery must be fully charged before conducting all of the test on smart tailgate, and all of the interfering elements of the system must be shown and understood. (refer to the explanation of smart tailgate) Refer to the analysis reference table when inspecting and testing the smart tailgate.

Status	Cause	Solution
Sudden opening of tailgate	Activation by mistake or malfunction of open/close switch	Check for short or malfunction of short circuit of switch
	Latch assembly failure	Check for wiring connection
		Check for failure code, and replace the latch if needed
	Failure of Smart Tailgate or the body control module	Reset the module fuse or reconnect the battery. If it does not operate properly, check the wiring connection and analyze information.
Unable to power open and close the tailgate	False indication, or not parked status	Check a switch status using analyzing device
	Low voltage of the Smart Tailgate module battery	Check for proper voltage of the Smart Tailgate
		Battery charged
	Swelling of the fuse	Check if the fuse is swollen
	Malfunction of STG spindle	Check for STG spindle status
	Critical code failure at BCM/tailgate control module	Check for code status using KDS
	Latch assembly failure	Check if the wiring connection of fuse are swollen.
		Check if there is any alien object interfering with the operation of latch assembly.
Unable to open and close of the tailgate	Failure in motor assembly	Check for motor assembly
	Interference of the consisting components	Replace the needed parts or reset the affected position.
	Wiring problem (system or vehicle)	Resolve the problem using the wiring map.
		Refer to wiring diagram.
Loss of electricity during the tailgate operation	Wiring problem (system or vehicle)	Resolve the problem using the wiring map.
		Refer to wiring diagram.
	Low voltage of vehicle battery	Check for proper voltage of STGM.
		Charge the battery
	Failure in Smart Tailgate or BCM	Check for failure code using analyzing device
	Failure in motor assembly	Test the motor assembly
Power latching unable at Primary/Secondary position	Latch assembly failure	Check if the wiring connection of fuse are swollen.
		Check for failure code using analyzing device
		Resolve the problem using a vehicle analyzing manual.
		Replace the latch assembly if needed.
	Interference of the consisting components	Replace the needed parts or reset the affected position.
	Failure in Smart Tailgate or BCM	Check for failure code using analyzing device
	Excessive sealing force of the tailgate	Check for shock on sealing, assembly failure, alien object or other possible factors.
	Failure in motor assembly	Check the motor assembly
Unable to unlock the latch at Primary position	False indication, or not parked status	Check switch status using analyzing device
	Low voltage of the Smart Tailgate module battery	Check for proper voltage of the Smart Tailgate
		Battery charged
	Swelling of the fuse	Check if the fuse is swollen
	Latch assembly failure	Check switch status using analyzing device
		Check for alien object interfering with the latch assembly operation or shock on components.
		Resolve the problem using a vehicle analyzing manual.
		Remove the latch assembly if needed.
	Failure in outside handle connection	Check for handle joint and wiring connection.
	Failure of Smart Tailgate or the body control module	Check for the failure code or cycle using analyzing device.
	Interference of the consisting components	Replace the needed parts or reset the affected position.
Tailgate operation using pop/console switch unavailable.	Swelling of the fuse	Check if the fuse is swollen
	Low voltage of STGM	Check for proper voltage of STGM.
		Charge the battery
Unable to unlock the electric lock	Failure on the latch assembly	Check for alien object interfering with the latch assembly operation or shock on components.
		Check for the failure code or cycle using analyzing device.
		Check for pole/latch switch using analyzing device.
		Resolve the problem using the vehicle inspection information
Unable to unlock the electric lock	Failure of Smart Tailgate module	Resolve the problem using the vehicle inspection information
	Failure of Body Control Module (BCM)	Resolve the problem using the vehicle inspection information
		Replace BCM if needed
	Malfunctioning of wireless remote control key	Rewrite the wireless remote control key program
		Replace the wireless remote control key
	Malfunctioning of the tailgate motor assembly	Check for alien object interfering with the motor assembly operation.
		Check for wiring connection
		Change the assembly if motor clutch is not operable
		Replace the switch if the full opening switch is not working
		Resolve the problem using the vehicle inspection information
		Replace the motor if needed
Unable to maintain opened status of the tailgate	Failure on STG spindle	Replace STG spindle
		Check if attached objects are damaged
Excessive operating force when opening and closing	Failure on STG spindle	Replace STG spindle
		Check if attached objects are damaged
	Interference of the consisting components	Replace the needed parts or reset the affected position.
When tailgate keeps cinching lock mode	Failure on the latch assembly	Check if wiring connection and fuse are swollen
		Check the switch with analyzing device
When tailgate keeps electric lock mode	Failure on the latch assembly	Check for wiring connection
		Check for any alien object
		Resolve the problem using the vehicle inspection information
	Malfunctioning of the control module	Check for failure code using analyzing device
	Wiring problem (system or vehicle)	Resolve the problem, referring an electric circuit
		Refer to wiring diagram.
		Check the vehicle inspection information for detailed process
	Failure of the motor assembly	Check for operating environments constantly
	Wiring problem (system or vehicle)	Resolve the problem, referring an electric circuit
		Refer to wiring diagram.
Very slow opening of the tailgate	Vehicle battery voltage too low	Check for proper voltage of STGM.
		Charge the battery
	Malfunctioning of the tailgate STG spindle	Replace the tailgate STG spindle if needed
	Interference of the consisting components	Replace the needed parts or reset the affected position.
	Vehicle angle too steep for electric operation	Operate the tailgate manually
	Malfunctioning of the tailgate motor assembly	Replace the motor assembly if needed
Rattling or squeaky sound	Alien object jammed in tailgate components	Remove the alien object
	Excessive tightening or loosening of the components	Resolve the excessive tightness or looseness