2007 > 2.7L V6 GASOLINE >
DESCRIPTION
Power tail gate is an electro - mechanical system designed to provide power opening and closing of a vehicle’s tail gate
through the push of a button of the transmitter key or tail gate handle or the overhead console or switch of the tail
gate.
The power tail gate will reverse direction of travel if resistance to movement is detected while the tail gate is being
closed. If resistance to movement is detected while the power tail gate is being opened, the tail gate will stop moving.
1. PTG DRIVE UNIT
Power tailgate drive unit consists of a DC motor, optical sensor, clutch, push rod, rack and wire harness.
PTG drive unit is located in rear left on D- pillar panel. PTG drive unit opens and closes the tail gate connected
push rod automatically.
a.Optical sensor : Provides tail gate velocity and position information
b. Drive unit clutch : Transmit motor power to push rod through pinion gear.
2. POWER LATCH
Power latch is located in the lower part of tail gate panel. When tail gate located latching position, cinching motor
(A) has a cinch electrically. And unlatch motor (B) unlatch the latch electrically when receive the open signal.
3.ANTI PINCH STRIP (C)
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.
2.When the power ON/OFF button (PWR) (B) is ON, the power sliding door and power tailgate can be opened and
closed automatically by using the switch.
3. When the power tail gate door will power open/close fully, the warning lamp and the chime will operate 3 times.
4. General rules for chime functions
a. Chime & tail lamp shall operate prior to and during power opening or closing the Tailgate : 3 Times (0.5 sec on,
0.5 sec off), after 1 chime start opening or closing with two chimes.
b. Chime shall operate when a power operation cannot be performed as requested except handle pull : 1 Time
(Duration 0.5 second on)
c. Chime shall operate when an obstacle has been detected : 3 Times (0.5 sec on, 0.5 sec off)
d. Chime shall operate if PTG has not reached primary latch position after a power cinch cycle : 3 Times (0.5 sec
on, 0.5 sec off)
POWER TAIL GATE OPERATING CONDITION
1.The tail gate will not power open when vehicle is moving above 3 mph (5 km/h) or the gearshift lever is not in P
(Park) for automatic transaxle.
2. The power tail gate will not open with the transmitter or the main control button when all power sliding doors are
locked and closed.
3. The power tail gate will detect the resistance, then stop movement or move to the full open position to allow the
object to be cleared.
4. If the automatic stop and reversal feature operates continuously more than twice during one opening or closing
operation, the power tail gate may stop at that position. At this time, close the tailgate manually and operate the
tailgate automatically again.
5. The PTG system is an electronic device and requires a minimum battery voltage to operate. The Electronic Control
Unit (ECU) monitors the battery voltage present at the ECU input battery input and will not permit operation if the
battery voltage is out of range.
6. If the PTG button is pressed during closing operation, the power tail gate may reverse direction and open fully.
7. Remove the accumulated snow or ice on the power tail gate before operating.
a.To prevent the battery from being discharged, do not leave the power sliding door and power tailgate at
open position for a long time.
b. The PTGM will go to a sleep mode and power operation will be disabled if the tail gate is left open longer
than 6 hours.
Manually close the tail gate to the latched position to reset the PTGM. Power operation will be restored.
a.Always disconnect the negative battery cable before attempting any power tailgate system service.
b. Never attempt to enter or exit the vehicle with the tailgate in motion. You could be injured or cause
damage to the power tailgate system and or components.
POWER OPERATION
The PTG system shall not open the Tailgate when the vehicle is moving.
The PTG system shall operate through the full range of Tailgate travel.
The PTG system shall learn the position of each travel extreme: full open and full closed.
1.Vehicle condition
Moving
a. (IGN=OFF and Vehicle Speed > 5 km/h) or (IGN= ON and (Vehicle Speed > 5 km/h or TRANS - not P/N))
Not moving a. (IGN=OFF and Vehicle Speed < 5 km/h) or (IGN= ON and (Vehicle Speed < 5 km/h and TRANS - P/N))
2. TAILGATE TRAVEL ZONES
The Tailgate travel is divided into four zones starting at the full closed and latched position. Dimensions are at the
bottom edge of the Tailgate and are approximate.
Zone 1 : Power Latching - from primary to secondary latch (0 to 10 mm depending on latch travel).
Zone 2 : Between Secondary and Crossover Point (Secondary to 20 degrees)
Zone 3 : Between Crossover Point and Power Off (20 degrees to 79 degrees)
Zone 4 : Power Off to Full Open - approximately 5° (15 counts from full open)
2007 > 2.7L V6 GASOLINE >
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 scan tool
and the proper Body Diagnostic Procedures manual. The scan tool 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
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
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
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
No power latching in
primary and/or secondary
positionsReplace 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
Replace BCM if necessary
Failure of RAM Replace RAM if necessary
Failure of key fob Reprogram 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
Check for foreign matter preventing the
operation of motor assembly
Check wire connections
Failure of tailgate motor assemblyMotor 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
Check for broken attachments
High inside/outside opening
effort Failure of tailgate gas struts
Replace gas struts
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
Worn/Loose components Check and tighten loose components
DTC LIST DTC CODE DISPLAY
B1101 Battery Voltage High
B1102 Battery Voltage Low
2007 > 2.7L V6 GASOLINE >
ADJUSTMENT
POWER TAIL GATE INITIALIZATION
POWER TAILGATE SYSTEM RESET
Certain conditions may require that the PTG system be reset. 1. Remove the MEMORY fuse that provides logic power to the PTGM.
2. Wait 1 minute. Replace fuse. Initialize the PTGM.
INITIALIZATION PROCEDURE
The Power Tailgate system initialization must start from the full closed or latched position. The Tailgate must be
powered Open once to fully initialize the system (Obstacle detection shall be active during Tailgate initialization).
1. Manually close and latch the Tailgate.
2. Power the Tailgate open using the Open/Close switch, outside handle or the remote control.
ALTERNATE METHOD
1.Remove the black connector (J2) from the PTGM.
2. Wait a short time. Replace connector. Initialize PTGM.
a.The PTG system initialization must start from the primary or secondary latched position.
b. Obstacle detection shall be active during system initialization.
2007 > 2.7L V6 GASOLINE >
INSPECTION
POWER TAILGATE MOTOR INSPECTION
1. Check the power tailgate motor by using the diagnostic tool.
2. Select a vehicle type and "BODY CONTROL MODULE(BCM)".
3.Select the "REAR AREA MODULE"
4.Select the "ACTUATION TEST" and "PTG OPEN/CLOSE" to operate tailgate motor.
5.If there is no working in actuator, change the drive unit.
OPTICAL SENSOR INSPECTION
1.Check the power tailgate control module input/output value by using the diagnostic tool. If the operation of tailgate
control module is abnormal, replace power tailgate drive unit.
2. When checking the optical sensor, select a vehicle type and "POWER SLIDING/TAILGATE" menu.