Troubleshooting

Abnormality inspection

Diagnosis with GDS

1. 1
   In the body electrical system, a fault can be quickly diagnosed using the Global Diagnostic System (GDS). The GDS provides the following information.

   1. Self-diagnosis: checks for malfunctions and the number of codes (DTC)
   2. Current data: checking the input/output status of the system
   3. Operation check: checks the operating conditions of the system
   4. Additional function: controls other functions, including additional system setup and zero point adjustment
2. 2
   Select "Vehicle Model" and "Power Tailgate Module" to check the vehicle using the tester.
3. 3
   Select the "Current Data" menu to check the current status of inputs and outputs.

   

4. 4
   To control the input force of the module to be controlled, select the "Operation Check" option.
5. 5
   The new power tailgate module is configured at the factory for the assembly line. After replacing with a new power tailgate module, it is necessary to switch to A/S mode. (DTC (B24B0) is output without changing this mode.)
6. 6
   After connecting GDS, select the "Tailgate Mode Change" procedure.

   

7. 7
   Perform the tailgate mode change procedure according to the messages displayed in GDS.

   

   

Mode change (power tailgate system) System initialization: System initialization is required to recognize the closed position on the power tailgate module. The initialization process after battery power reset is required to accurately recognize the opening and closing maximum position 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 many components. For accurate results, the power tailgate control module must be inspected. The most reliable, efficient and accurate method is to use GDS, the required power tailgate tool. GDS assists technicians in checking the switch with the power tailgate control module disconnected and allows checking the current switch state of the power tailgate control module. The battery must be fully charged before performing any power tailgate tests, and all interfering elements of the system must be identified and understood. (See Smart Tailgate explanation.) See the Smart tailgate inspection and testing reference chart.

Condition	Cause	Solution
Liftgate opens suddenly	Incorrect activation or malfunction of the open/close switch	Check the switch for short circuit or short to ground.
	Latch malfunction	Check the wiring connection
		Check the DTC and replace the latch if necessary.
	Smart tailgate or body control module malfunction	Reset the module fuse or reconnect the battery. If the malfunction persists, check the wiring connection and refer to the Manual.
Power liftgate cannot be opened or closed	Incorrect indication or unlocked state	Check the switch condition using a scan tool
	Power tailgate module battery supply, low voltage	Check the correct voltage of the power tailgate lock.
		Battery charged
	Bumps or dents on the fuse	Check whether the fuse is blown
	PTG pin malfunction	Check the PTG contact condition.
	Critical error code in the tailgate control unit / BCM	Check the DTC codes using GDS
	Latch malfunction	Check whether the fuse wire connection is swollen.
		Check for foreign objects interfering with the entire lock operation.
Trunk lid cannot be opened or closed	Malfunction of the engine assembly	Check the motor assembly
	Component interference	Replace the necessary parts or reset the malfunctioning position.
	Wiring problems (system or vehicle)	Solve the problem using the wiring diagram.
		Refer to the wiring diagrams.
Loss of power during liftgate operation	Wiring problems (system or vehicle)	Solve the problem using the wiring diagram.
		Refer to the wiring diagrams.
	Low vehicle battery voltage	Check the PTGM voltage.
		Charge the battery.
	Power tailgate or BCM malfunction	Check the DTC code using a scan tool
	Malfunction of the engine assembly	Check the engine
Power latch function not possible in primary/secondary position	Latch malfunction	Check whether the fuse wire connection is swollen.
		Check the DTC code using a scan tool
		Solve the problem using the vehicle scan manual.
		Replace the latch assembly if necessary.
	Component interference	Replace the necessary parts or reset the malfunctioning position.
	Power tailgate or BCM malfunction	Check the DTC code using a scan tool
	Excessive closing force of the tailgate	Check the seal for bumps, assembly error, foreign objects, or other possible causes.
	Malfunction of the engine assembly	Check the engine
Latch cannot be released in the primary position	Incorrect indication or unlocked state	Check the switch condition using a scan tool
	Power tailgate module battery supply, low voltage	Check the correct voltage of the power tailgate lock.
		Battery charged
	Bumps or dents on the fuse	Check whether the fuse is blown
	Latch malfunction	Check the switch condition using a scan tool
		Check for foreign objects interfering with the latch assembly or impacts on components.
		Solve the problem using the vehicle scan manual.
		Remove the latch assembly if necessary.
	Malfunction in the outside handle connection	Check the handle connection and the wiring connection.
	Power tailgate or body control unit malfunction	Check for errors or cycle codes using the diagnostic device.
	Component interference	Replace the necessary parts or reset the malfunctioning position.
Trunk lid control with pop switch / console is not available.	Bumps or dents on the fuse	Check whether the fuse is blown
	PTGM low voltage	Check the PTGM voltage.
		Charge the battery.
Power lock cannot be released	Non-standard lock assembly	Check for foreign objects interfering with the latch assembly or impacts on components.
		Check for errors or cycle codes using the diagnostic device.
		Check the latch/pole switch using a scan tool.
		Solve the problem using the vehicle inspection manual
Power lock cannot be released	Power main 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 malfunction	Reprogram the wireless remote control.
		Replace the wireless remote
	Tailgate motor malfunction	Check for foreign objects interfering with the motor.
		Check the wiring connection
		Replace the unit if the motor clutch does not engage
		Replace the switch if the fully open switch does not work
		Solve the problem using the vehicle inspection manual
		Replace the motor if necessary
Trunk lid cannot be held open	PTG spindle abnormality	Replace the PTG pin
		Check whether fixed objects are not damaged
Excessive force when opening and closing	PTG spindle abnormality	Replace the PTG pin
		Check whether fixed objects are not damaged
	Component interference	Replace the necessary parts or reset the malfunctioning position.
When the tailgate holds the adjustment lock mode	Non-standard lock assembly	Check whether the cable connection and fuse are swollen.
		Check the switch using a scan tool.
When the trunk lid holds the power lock mode	Non-standard lock assembly	Check the wiring connection
		Check for foreign objects
		Solve the problem using the vehicle inspection manual
	Control unit malfunction	Check the DTC code using a scan tool
	Wiring problems (system or vehicle)	Solve the problem by referring to the wiring diagram
		Refer to the wiring diagrams.
		For details, refer to the vehicle inspection manual.
	Engine assembly malfunction	Constantly monitor the operating environment
	Wiring problems (system or vehicle)	Solve the problem by referring to the wiring diagram
		Refer to the wiring diagrams.
Tailgate opens very slowly	Vehicle battery voltage is too low	Check the PTGM voltage.
		Charge the battery.
	Tailgate PTG pin malfunction	Replace the tailgate PTG pin if necessary.
	Component interference	Replace the necessary parts or reset the malfunctioning position.
	Vehicle incline is too steep for power operation	Operate the tailgate manually
	Tailgate motor malfunction	If necessary, replace the motor assembly
Squeal or rattle	Foreign object caught in the tailgate components	Remove foreign objects
	Excessive tightening or over-tightening of components	Solve the problem of loosening or over-tightening