Page 1369 of 1575

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.
Page 1370 of 1575

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)
Page 1371 of 1575
2007 > 2.7L V6 GASOLINE >
COMPONENT LOCATION
Page 1372 of 1575

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
Page 1373 of 1575

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
Page 1374 of 1575

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
Page 1375 of 1575

B1105Reference Voltage Fault
B1223 VSS Fault
B1270 Optical Sensor - 1 Output Stuck High
B1271 Optical Sensor - 1 Output Stuck Low
B1272 Optical Sensor - 2 Output Stuck High
B1273 Optical Sensor - 2 Output Stuck Low
B1580 Ignition Start Switch Short High
B1585 Latch Switch Failure
B1621 ECU Defective
B1645 Drive Unit Failure
B2421 Drive Motor Short High
B2422 Drive Motor Short Low
B2423 Clutch Open Or Short High
B2424 Clutch Short Low
B2425 Left pinch strip open or Stuck High
B2426 Left pinch strip stuck Low
B2427 Right Pinch Strip Open Or Stuck High
B2428 Right Pinch Strip Stuck Low
B2450 Unlatch or Cinch Motor short High
B2451 Unlatch or Cinch Motor short Low
B2452 Cinch motor open (PTG Only)
INPUT/OUTPUT MONITORING [•Ô™•Ô™
b
b] BCM DISPLAY
UNIT
1 Battery Logic Voltage Voltages
2 Battery Power Voltage Voltages
3 Optical Sensor Power Voltages
4 Gate Optical Sensor 2 LOW/HIGH
5 Gate Optical Sensor 1 LOW/HIGH
6 Detent Switch LOW/HIGH
7 Forkbolt Primary Switch LOW/HIGH
8 Power Battery Voltage OUT OF RANGE/IN
RANGE
9 Forkbolt Secondary Switch LOW/HIGH
10 Right Pinch Strip - Pinch Condition Not Pinched/Pinched
11 Left Pinch Strip - Pinch Condition Not Pinched/Pinched
12 Park Switch Out Of Park/Park
13 Ignition Swtich LOW/HIGH
14 Tail Lamp Flash Feedback LOW/HIGH
15 Local Open/Close Switch Not Pressed/Pressed
Page 1376 of 1575
16Master Open/Close Switch Not Pressed/Pressed
17 Spare Switch LOW/HIGH
18 Learn Process Complete Status Not Complet/Complete
19 Vehicle Speed Slow Status ≥5kph/<5kph
20 On/Off Switch ON/OFF
21 Start Switch LOW/HIGH
22 Gate Open Feedback Voltages
23 Cinch Feedback (PTG Only) Voltages
24 Uncinch Feedback (PTG Only) Voltages
25 Gate Close Feedback Voltages
26 Unlatch Feedback Voltages
27 Unlatch Return Feedback Voltages
28 Clutch Feedback Voltages
29 Gate Position Count -
30 Most Recent Cinch Time ms
31 2nd Most Recent Cinch Time ms
32 3rd Most Recent Cinch Time ms
33 4th Most Recent Cinch Time ms
34 Left Pinch Strip Voltage Voltages
35 Right Pinch Strip Voltage Voltages