Troubleshooting

Failure Check

Diagnosis using the diagnostic tool

1. 1
   The electrical system malfunctions can be quickly diagnosed using the vehicle diagnostic system (Diagnostic tool). The diagnostic system (diagnostic tool) provides the following information.

   1. DTC Search: Check malfunction and diagnostic trouble code (DTC)
   2. Data Analysis: Check the input/output data status of the system
   3. Actuation Test: Check the system operating status
   4. S/W Management: Control other functions, including system parameter setting and zero point adjustment
2. 2
   To diagnose the vehicle using the diagnostic tool, select "DTC Analysis" and "Vehicle".

   

3. 3
   Select "Data Analysis".

   

4. 4
   Select "PTG" to check the current input/output status.

   

   

5. 5
   After replacing the power liftgate module with a new one, check for DTCs at all times. If DTC B24B0 is present, perform the power liftgate mode change.
6. 6
   After connecting the diagnostic tool, select "Software Management" and "Vehicle Model".

   

7. 7
   Select the procedure "Power Liftgate Mode Configuration" and "Power Liftgate Mode Configuration".

   

8. 8
   Perform the "Power Liftgate Mode Setting" procedure in accordance with the message on the diagnostic tool screen.

   

Mode Change (Power Tailgate System) System Initialization. System initialization is required to recognize the closed position of the liftgate to the tailgate module. After battery power reset, system initialization is required to accurately determine the maximum open and closed positions of the tailgate. The power tailgate operates normally after system initialization is complete. Procedure: Inspection and Testing — Power Tailgate System. The power tailgate system is a complex system consisting of several components. To obtain accurate inspection results, the power tailgate control module must be inspected. The most reliable, efficient and accurate method is to use the scan tool. The power tailgate requires a scan tool. The scan tool assists technicians in inspecting the disconnected switch and allows checking the recorded current status of the power tailgate control module switch. The battery must be fully charged before performing all power tailgate tests, and all interfering system elements must be shown and understood. (See Smart Liftgate description.) Refer to the analysis reference table when inspecting and testing the smart liftgate.

Status	Cause	Solution
Liftgate opens suddenly	Inadvertent activation or malfunction of the open/close switch	Check the switch for a short circuit or short-circuit malfunction
	Latch assembly malfunction	Check the wiring connection
		Check for DTCs and replace the latch if necessary.
	Smart Tailgate or Body Control Module failure	Reset the module fuse or reconnect the battery. If it does not operate properly, check the wiring connection and refer to the service manual.
Liftgate cannot be opened or closed	False indication or not-parked condition	Check the switch status using the scan tool
	Low battery voltage to Power Tailgate module	Check the voltage at the power liftgate.
		Battery charged
	Fuse blown	Check whether the fuse is blown
	PTG spindle malfunction	Check the PTG spindle condition
	Critical code failure in the BCM/liftgate control unit	Check the code status using the diagnostic tool
	Latch assembly malfunction	Check whether the fuse wiring connections are blown.
		Check whether a foreign object is interfering with the latch assembly.
Liftgate cannot be opened or closed	Motor assembly malfunction	Check the motor assembly
	Interference of components	Replace the necessary parts or reset the malfunctioning position.
	Wiring problem (system or vehicle)	Solve the problem using the wiring diagram.
		Refer to the wiring diagram.
Loss of power during liftgate operation	Wiring problem (system or vehicle)	Solve the problem using the wiring diagram.
		Refer to the wiring diagram.
	Low vehicle battery voltage	Check the PTGM voltage.
		Charge the battery.
	Power liftgate or BCM failure	Check the DTC using the scan tool
	Motor assembly malfunction	Check the motor assembly
Power lock not possible in primary/secondary position	Latch assembly malfunction	Check whether the fuse wiring connections are blown.
		Check the DTC using the scan tool
		Solve the problem using the vehicle diagnostic manual.
		Replace the latch assembly if necessary.
	Interference of components	Replace the necessary parts or reset the malfunctioning position.
	Power liftgate or BCM failure	Check the DTC using the scan tool
	Excessive power liftgate seal force	Check for impact on the seal, assembly malfunction, foreign objects, or other possible causes.
	Motor assembly malfunction	Check the motor assembly
Latch cannot be unlocked in primary position	False indication or not-parked condition	Check the switch status using the scan tool
	Low battery voltage to Power Tailgate module	Check the voltage at the power liftgate.
		Battery charged
	Fuse blown	Check whether the fuse is blown
	Latch assembly malfunction	Check the switch status using the scan tool
		Check whether a foreign object is interfering with the latch assembly or impact on components.
		Solve the problem using the vehicle diagnostic manual.
		Remove the latch assembly if necessary.
	Malfunction in the outside handle connection	Check the handle connection and the wiring connection.
	Power liftgate or Body Control Module failure	Check the DTC or perform a cycle using the scan tool.
	Interference of components	Replace the necessary parts or reset the malfunctioning position.
Liftgate control with the pull-out/console switch is not available.	Fuse blown	Check whether the fuse is blown
	Low PTGM voltage	Check the PTGM voltage.
		Charge the battery.
Power lock cannot be unlocked	Lock assembly malfunction	Check whether a foreign object is interfering with the latch assembly or impact on components.
		Check the DTC or perform a cycle using the scan tool.
		Check the "pole/latch" switch using the scan tool.
		Solve the problem using the vehicle inspection manual
Power lock cannot be unlocked	Power liftgate module malfunction	Solve the problem using the vehicle inspection manual
	Body Control Module (BCM) malfunction	Solve the problem using the vehicle inspection manual
		Replace the BCM if necessary
	Wireless remote control key malfunction	Reprogram the wireless remote control key
		Replace the wireless remote control key
	Liftgate motor assembly malfunction	Check for foreign objects interfering with the motor assembly.
		Check the wiring connection
		Replace the assembly if the motor clutch does not operate.
		Replace the switch if the fully open switch does not operate.
		Solve the problem using the vehicle inspection manual
		Replace the motor if necessary
Liftgate cannot be held in the open position	PTG spindle failure	Replace the PTG spindle
		Check whether the attached objects are damaged
Excessive operating force when opening and closing	PTG spindle failure	Replace the PTG spindle
		Check whether the attached objects are damaged
	Interference of components	Replace the necessary parts or reset the malfunctioning position.
Liftgate keeps locking	Lock assembly malfunction	Check whether the wiring connections and fuse are blown.
		Check the switch using the scan tool
Liftgate remains in power lock mode	Lock assembly malfunction	Check the wiring connection
		Check for a foreign object
		Solve the problem using the vehicle inspection manual
	Control unit malfunction	Check the DTC using the scan tool
	Wiring problem (system or vehicle)	Troubleshoot the electrical circuit
		Refer to the wiring diagram.
		For detailed procedures, refer to the Vehicle Inspection manual.
	Motor assembly malfunction	Always check the operating environment
	Wiring problem (system or vehicle)	Troubleshoot the electrical circuit
		Refer to the wiring diagram.
Tailgate opens very slowly	Vehicle battery voltage is too low	Check the PTGM voltage.
		Charge the battery.
	Power tailgate spindle malfunction	If necessary, replace the power tailgate PTG spindle.
	Interference of components	Replace the necessary parts or reset the malfunctioning position.
	Vehicle incline is too steep for power operation	Operate the tailgate manually
	Liftgate motor assembly malfunction	If necessary, replace the motor assembly
Rattling or squeaking noise	Foreign object caught in the tailgate components	Remove the foreign object
	Excessive tightening or loosening of components	Correct excessive play or looseness