Hyundai Santa Fe (TM): Power Tailgate Module

Hyundai Santa Fe TM 2019-2023 Service Manual / Body Electrical System / Power Tailgate Module

Description and operation

Description

Power tailgate is an electro-mechanical system designed to provide power opening and closing of the tailgate through the push of a button of a remote key (fob), console switch, inner switch or an outside handle switch of the tailgate.

The power tailgate will reverse direction of travel if resistance to movement is detected while the tailgate is being opened or closed.

Tailgate Position And Direction

The PTG system will measure the Tailgate position via an integrated hall sensor inside the Spindle drive unit motor.

The moving direction of tailgate will be detected by analyzing the direction of the drive unit motor.

The hall sensor pulse counting (position detection) is active during power and manual operation mode.

System Components

1.	PTG Unit PTG unit is located in rear left luggage side trim. PTG drive unit drive the two actuators (Spindles) by measuring the driving motors. PTG unit also controls anti trap functions by hall sensor analysis in the anti-pinch strip.

2.	PTG Latch Assembly PTG latch assembly is consist of Power Latch (A) and Power Closeing Unit (B). Power latch is located in the lower part of tail gate panel.

3.	PTG Spindle PTG spindle open and close the tailgate by driving the motor.

4.	Anti-Pinch Strip During power closing or cinching, the PTG system shall reverse to full open if an anti-pinch strip signal is received. However, the anti-pinch strips will not work when the Tailgate is idle in the full closed, full open, or stopped positions.

5.	SMK (Smart key) Push the power tailgate open of the SMK more than 0.5s to open the power tailgate. Power Open operation shall be reversed when an additional Open/Close signal is received during power opening.

6.	Tailgate inner switch

7.	Tailgate buzzer When a power operation cannot be performed as requested or an obstacle has been detected.

Operation

Power Tailgate Opening

** - Primary switch signal received by PTGM via CAN bus (sent by SJB)

PTGM Opening procedure:

1.	Opening can be triggered after a signal is received from, driver-console switch, outside handle switch, remote Key (FOB)

2.	The latch will be released (by SJB) by actuation of latch motor.

3.	On latch release, the tailgate latch pops out of the striker.

4.	PTG module controls the tailgate motor in order to open the tailgate.

5.	The rotating speed of the tailgate motor can be hall sensor that is built in the motor.

Opening angle of the tailgate is calculated by counting the input pulse signals from Hall sensor.

When the motor movement is restricted, the PTGM stops the tailgate motor movement due to obstacle detection.

Power Tailgate Closing

PTGM Closing procedure:

1.	Closing can be triggered after receiving a signal from, console (driver) switch, ouside handle switch, remote key (FOB), inner switch

2.	PTG module controls the tailgate motor in order to close the tailgate

3.	Closing angle of the tailgate is calculated by counting the input pulse signlas from hall sensor

4.	The rotating speed of the tailgate motor can be hall sensor that is built in the motor

5.	The tailgate latch engages with the striker and the latch is locked mechanically (Latch unlock → Latch lock)

6.	PTGM stops the tailgate motor operation after detecting the tailgate latch's secondary signal

7.	On detecting the latch's secondary signal, the power close unit (PCU) starts the contract (cinch) operation and stops after the latch lock signal is detected

8.	After contract operation is stopped, PCU is rewound until the PCU home position is reached

9.	The tailgate is completely closed and latch is fully locked

Learned/Calculated/Programmed positions

Maximum Point for Opening

Above this position a start in opening direction could make the tailgate move beyond the Maximum Basic Position and overload the mechanical system (hinges).

Therefore the start of an opening action above this point is disabled.

Anyway the tailgate moves beyond this point, if it has been started at a lower position.

Learned Mechanical End Position

This is the mechanical block position while opening and is considered to be 100% opening. During the first tailgate opening this position is learned.

After learning, the tailgate will not move beyond the Maximum Basic Position, which is defined by the Learned Mechanical Position – Security Distance.

All positions are defined by parameters in the ECU or programmed by the user (Basic Programmed Position)

Programming the max. T/gate opening (Garage Position)

The customizable Programmed Basic Position is set equal to the Maximum Basic Position after the Learned Mechanical End Position is learned.

–	The customer can change the Programmed Basic Position to any new position between the Maximum Point For Closing and the Maximum Basic Position.

–	If the customer wants to set a new Programmed Basic Position below the actual Programmed Basic Position, he has to move the tailgate electrically or manually to the new position and has to push the Inner Switch for e.g. 3 seconds (time can be modified by parameter)

–	If the customer wants to set a new Programmed Basic Position above the actual Programmed Basic Position he has to move the tailgate manually to the new position and has to push the Inner Switch for 5 seconds (time can be modified by parameter)

–	If the user tries to program a tailgate position above the Maximum Basic Position, the ECU will set the Programmed Basic Position to the Maximum Basic Position.

System Parameterization

Due to mechanical tolerances and adjustments in vehicle production and assembly the power operated tailgate needs calibration of the maximum movement range before proper operation can be ensured.

The tailgate’s maximum movement range is represented by the number of Hall-pulses received by the ECU from the actuators’ speed / position sensors during a tailgate movement from the fully closed position (closure unit in fully latched position) to the upper end position limited by mechanical constraints (e.g. upper bump stops, spindle length or similar).

Calibration Mode

Manual De-calibration Mode

Buzzer operation is defined in the following chart

	BUZZER	LAMP *)	Remark
T/gate start	2 times	2 times	When T/gate is triggered by Remote Contol or T/gate Console Switch
T/gate start	n.a.	n.a.	When T/gate is triggered by T/gate Inner Switch or T/gate Outer Handle Switch
T/gate stop	n.a.	n.a.
System error	3 Times	-	PCU/Tailgate antiplay active, 0ver-/undervoltage condition, Endposition-/position error, spindle error, CAN error, Latch closed when Tailgate open
T/gate not closed	10 times	10 times	Latch Lock Switch not present
During Calibration run	Continuous ON-OFF beeping	n.a.	Activate buzzer but not C_PTHazard
Max. End Position learned	n.a.	2 times	Buzzer confirms learning finished
Max. End Position deleted	1 time	n.a.	Buzzer confirms "position deleted"
Car is moving with open T/gate	10 times	n.a.	T/gate open AND Speed >3km/h
Garage Position saved	2 times	n.a.	Buzzer confirms "New Garage Position"

*) Lamp will be synchronized by sending C_PTHazard simultaneously to Buzzer signal

Components and components location

Component Location (1)

1. Buzzer
2. Console S/W
3. RKE
4. Anti Pinch Strip

5. Spindle Drive
6. Tailgate Trim Switch
7. Power Latch
8. PTG Control Module

Inspection

Tailgate normal operation transmit / receive process

•	FOB key Switch : FOB key Switch → BMC / SMK → CAN communication → PTG Module

•	Driver Switch : Driver Switch → Wiring → PTG Module

•	Outer Switch : Outer Switch → Wiring → SJB → CAN communication → PTG Module

① Press the power tailgate open switch

② Transmit / receive power tailgate open signal via CAN communication and wiring

③ Power tailgate open

•	The operation of the power tailgate is activated by mutual communication with the vehicle's module and switch.

•	Before replacing parts, it is necessary to check the basic communication, switch signals, and contact points of wire connectors.

PTG Inspection Flow Chart

Power Tailgate NG List

List	Solution
CAN BUS OFF	Check CAN Line
Power Tailgate Module Inline Mode Not Deactivated	1. S/W Management - Disable Inline Mode
Power Tailgate Module Inline Mode Not Deactivated	2. Disable inline mode by driving (5 km/h↑)
PTG Unlatch Error	1. Check latch connector plugged in properly
	2. Check latch wiring
	3. Check latch assembly
PTG Spindle Hall Sensor Error, LH	1. Check spindle connector plugged in properly - LH
	2. Check spindle wiring - LH
	3. Check spindle assembly - LH
PTG Spindle Hall Sensor Error, RH	1. Check spindle connector plugged in properly - RH
	2. Check spindle wiring - RH
	3. Check spindle assembly - RH
PTG Anti-Pinch Sensor Error, LH	1. Check anti-pinch sensor connector plugged in properly - LH
	2. Check anti-pinch sensor wiring - LH
	3. Check anti-pinch sensor assembly - LH
PTG Anti-Pinch Sensor Error, RH	1. Check anti-pinch sensor connector plugged in properly - RH
	2. Check anti-pinch sensor wiring - RH
	3. Check anti-pinch sensor assembly - RH
PTG Latch Cinching Rewinding Fail Max	1. Check latch connector plugged in properly
	2. Check latch wiring
	3. Check latch assembly
PTG Integrated Latch Home Position Switch Error	1. Check latch connector plugged in properly
	2. Check latch wiring
	3. Check latch internal switch signal
	4. Check latch assembly
PTG Integrated Latch Switch Combination Error	1. Check latch connector plugged in properly
	2. Check latch wiring
	3. Check latch internal switch signal
	4. Check latch assembly

Sensor Data Diagnosis With Diagnostic Tool

1.	Select the 'Data Analysis'.

2.	Select the 'PTG'.

3.	Check the sensor data.

Troubleshooting

Failure Inspection

Diagnosis with diagnostic tool

In the body electrical system, failure can be quickly diagnosed by using the vehicle diagnostic system (diagnostic tool).

The diagnostic system (diagnostic tool) provides the following information.

(1)	Fault Code Searching : Checking failure and code number (DTC)

(2)	Data Analysis : Checking the system input/output data state

(3)	Actuation test : Checking the system operation condition

(4)	S/W Management : Controlling other features including system option setting and zero point adjustment

2.	If diagnose the vehicle by diagnostic tool, select "DTC Analysis" and "Vehicle".

3.	Select the 'Data Analysis'.

4.	Select the 'PTG' to search the current state of the input/output data.

Mode Change (Power Tailgate System)

1.	After replacing with a new power tailgate module, check for DTC code at all times. If DTC code B24B0 exists, perform power tailgate mode change.

2.	After connecting the diagnostic tool, Select the 'S/W Management' and 'Car model'.

3.	Select the "Power Tailgate" and Power Tailgate Mode Configuration" procedure.

4.	Perform the "Power Tailgate Mode Configuration" procedure according to the diagnostic tool screen message.

System Initialization

System initialization is needed to recognize the closing position of the tailgate to power tailgate module.

The initialization process after battery power reset, system initialization is needed to recognize the maximum opening and closing tailgate position exactly.

The power tailgate operates normally after system initialization is completed.

Procedure :

Inspection and Test - Power Tailgate System

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

The most trustworthy, effective and accurate method is using diagnostic tool required by power tailgate.

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

The battery must be fully charged before conducting all of the test on power 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
	Latch assembly failure	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 manual.
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 Power Tailgate module battery	Check for proper voltage of the Power Tailgate
	Low voltage of the Power Tailgate module battery	Battery charged
	Swelling of the fuse	Check if the fuse is swollen
	Malfunction of PTG spindle	Check for PTG spindle status
	Critical code failure at BCM/tailgate control module	Check for code status using diagnostic tool
	Latch assembly failure	Check if the wiring connection of fuse are swollen.
	Latch assembly failure	Check if there's any alien object interfering with the operation of latch assembly.
Unable to open and close of the tailegate	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.
	Wiring problem (system or vehicle)	Refer to wiring diagram.
Loss of electricity during the tailgate operation	Wiring problem (system or vehicle)	Resolve the problem using the wiring map.
	Wiring problem (system or vehicle)	Refer to wiring diagram.
	Low voltage of vehicle battery	Check for proper voltage of PTGM.
	Low voltage of vehicle battery	Charge the battery
	Failure in Power 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 Power 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 Power Tailgate module battery	Check for proper voltage of the Power Tailgate
	Low voltage of the Power Tailgate module battery	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 Power 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 PTGM	Check for proper voltage of PTGM.
	Low voltage of PTGM	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 manual
Unable to unlock the electric lock	Failure of Power Tailgate module	Resolve the problem using the vehicle inspection manual
	Failure of Body Control Module (BCM)	Resolve the problem using the vehicle inspection manual
	Failure of Body Control Module (BCM)	Replace BCM if needed
	Malfunctioning of wireless remote control key	Rewrite the wireless remote control key program
	Malfunctioning of wireless remote control key	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 manual
		Replace the motor if needed
Unable to maintain opened status of the tailgate	Failure on PTG spindle	Replace PTG spindle
Unable to maintain opened status of the tailgate	Failure on PTG spindle	Check if attached objects are damaged
Excessive operating force when opening and closing	Failure on PTG spindle	Replace PTG spindle
	Failure on PTG 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
When tailgate keeps cinching lock mode	Failure on the latch assembly	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 manual
	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 for the vehicle inspection manual 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
	Wiring problem (system or vehicle)	Refer to wiring diagram.
Very slow opening of the tailgate	Vehicle battery voltage too low	Check for proper voltage of PTGM.
	Vehicle battery voltage too low	Charge the battery
	Malfunctioning of the tailgate PTG spindle	Replace the tailgate PTG 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
Rattling or squeaky sound	Excessive tightening or loosening of the components	Resolve the excessive tightness or looseness

Power Tailgate Unit. Components and components location

Components

Power Tailgate Unit. Schematic diagrams

Circuit Diagram

Power Tailgate Unit. Repair procedures

Removal

1)	After replacing with a new power tailgate module, check for DTC code at all times. If DTC code B24B0 exists, perform power tailgate mode change. (Refer to Power Tailgate Module - "Troubleshooting")

2)	After replacing with a new power tailgate module, perform the system initialization. (Refer to Power Tailgate Module - "Troubleshooting")

3)	Before delivery to customer, operate the power tailgate to be sure that there is no warning sound.

1.	Disconnect the negative (-) battery terminal.

2.	Remove the rear left luggage side trim. (Refer to Body - "Luggage Side Trim")

3.	Remove the power tailgate unit connectors (A).

4.	Remove the power tailgate unit (A).

Installation

Install the power tailgate unit.

Tightening torque :

4.9 - 7.8 N.m (0.5 - 0.8 kgf.m, 3.6 - 5.8 lb-ft)

2.	Install the rear left luggage side trim.

3.	Connect the negative (-) battery terminal.

Power Tailgate Latch. Repair procedures

Removal

1.	Disconnect the negative (-) battery terminal.

2.	Remove the tailgate trim. (Refer to Body - "Tailgate Trim")

3.	Remove the tail gate latch and PCU (A) after loosening the mounting bolts.

Installation

Install the power tailgate latch & PCU assembly.

Tightening torque :

Latch : 7.6 - 11.4 N.m (0.7 - 1.2 kgf.m, 5.6 - 8.4 lb-ft)

PCU : 2.7 - 4.0 N.m (0.3 - 0.4 kgf.m, 3.0 - 5.8 lb-ft)

2.	Install the tailgate trim.

3.	Connect the negative (-) battery terminal.

Inspection

Inspection of the Power Tailgate Latch

Refer to Power Tailgate System - "Troubleshooting"

Anti-Pinch Strip. Repair procedures

Removal

1.	Disconnect the negative (-) battery terminal.

2.	Remove the tailgate trim. (Refer to Body - "Tailgate Trim")

3.	Remove the anti-pinch strip sensor connector (A).

4.	Remove the anti-pinch strip (A) after removing the clips.

Installation

1.	Install the tailgate anti-pinch strip.

2.	Install the tailgate side trim.

3.	Connect the negative (-) battery terminal.

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