Chrysler Town, Dodge Caravan. Manual — part 116
CONDITION
POSSIBLE CAUSES
CORRECTION
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 Liftgate
operation
Wiring problems (system or vehicle)
Troubleshoot using electrical schematics.
Refer to wiring diagrams
Low battery voltage
Charge battery
Failure of Power Liftgate or Body
Control Module
Disconnect then reconnect battery to reset
module, function liftgate, if no function
exists check for loose wire connections,
see Body Diagnostic Manual for detailed
procedures
Failure of motor assembly
Check for no drive condition
No power latching in
primary and/or secondary
positions
Failure of latch assembly
Check wire connections and for blown fuse
Check for foreign matter preventing the
operation of latch assembly
Troubleshoot using Body Diagnostic
Manual. Replace latch assembly, if
necessary
Binding or sticking of components
Establish location of binding and replace
necessary components
Failure of Power Liftgate or Body
Control Module
Disconnect then reconnect battery to reset
module, function liftgate, if no function
exists check for loose wire connections,
see Body Diagnostic Manual for detailed
procedures
Door seal force too high
Inspect seals for damage, mis-assembly,
foreign matter or other possible obstruction
Failure of motor assembly
Check for no drive condition
Latch will not fully release
from primary position
Failure of latch assembly
Check wire connections and for blown fuse
Check for foreign matter or damaged
components preventing the operation of
latch assembly
Troubleshoot using body electrical
troubleshooting manual Replace latch
assembly, if necessary
Failure of outside handle switch
Troubleshoot using Body Diagnostic
Manual Replace switch, if necessary
Failure of Power Liftgate or Body
Control Module
Disconnect then reconnect battery to reset
module, function liftgate, if no function
exists check for loose wire connections,
see Body Diagnostic Manual for detailed
procedures
Binding or sticking of components
Establish location of binding and replace
necessary components
8N - 6
POWER LIFTGATE SYSTEM
RS
POWER LIFTGATE SYSTEM (Continued)
CONDITION
POSSIBLE CAUSES
CORRECTION
Key fob, Outside Handle or
overhead console switches
do not power operate
liftgate
Blown Fuse
Check fuse and replace
Battery voltage low
Charge or replace battery in key fob or
vehicle
Failure of latch assembly
Check for foreign matter preventing the
operation of latch assembly
Check wire connection
Pawl and/or ratchet switch inoperative
Replace latch if necessary
Wiring problems (system or vehicle)
Troubleshoot using electrical schematics.
Refer to wiring diagrams
Failure of Body Control Module
(BCM)
Check electrical connections
Refer to the Body electrical troubleshooting
guide for additional checks
Replace BCM if necessary
Failure of key fob
Reprogram key fob
Replace key fob if necessary
Failure of Power Liftgate Module
Disconnect then reconnect battery to reset
module, function liftgate, if no function
exists check for loose wire connections,
see Body Diagnostic Manual for detailed
procedures
Failure of liftgate motor assembly
Check for foreign matter preventing the
operation of gear motor assembly
Check wire connections
Motor clutch does not engage, replace
assembly
Full open switch inoperative, replace
switch, if necessary
Troubleshoot using Body Diagnostic
Manual Replace motor, if necessary
Liftgate does not stay open
Failure of liftgate prop rods
Replace prop rods, if necessary
Check for broken attachments
High inside/outside opening
effort
Failure of liftgate prop rods
Replace prop rods, if necessary
Check for broken attachments
Gear motor 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
RS
POWER LIFTGATE SYSTEM
8N - 7
POWER LIFTGATE SYSTEM (Continued)
CONDITION
POSSIBLE CAUSES
CORRECTION
Liftgate continues to cinch
closed during power mode
Failure of latch assembly
Check wire connections and for blown fuse
Check for foreign matter preventing the
operation of latch assembly
Troubleshoot using Body Diagnostic
Manual Replace components, if necessary
Failure of Power Liftgate or Body
Control Module
Disconnect then reconnect battery to reset
module, function liftgate, if no function
exists check for loose wire connections,
see Body Diagnostic Manual for detailed
procedures
Wiring problems (system or vehicle)
Troubleshoot using electrical schematics.
Refer to wiring diagrams
Liftgate continues to open
during power mode
(runaway motor)
Failure of Power Liftgate or Body
Control Module
Disconnect then reconnect battery to reset
module, function liftgate, if no function
exists check for loose wire connections,
see Body Diagnostic Manual for detailed
procedures
Failure of full open switch
Check wire connections
Replace switch, if necessary
Failure of motor assembly
Check for continuous drive condition
Wiring problems (system or vehicle)
Troubleshoot using electrical schematics.
Refer to Wiring Diagrams
Liftgate opens very slowly
Failure of liftgate motor assembly
Check wire connections
Replace motor assembly, if necessary
Failure of liftgate prop rods
Replace prop rods, if necessary
Binding or sticking of components
Establish location of binding and replace
necessary components
Grade of vehicle too steep for power
operation
Operate liftgate manually
Squeaks, Noises and rattles
Foreign material in door
compartment
Remove foreign material
Loose components
Check and tighten loose components
8N - 8
POWER LIFTGATE SYSTEM
RS
POWER LIFTGATE SYSTEM (Continued)
STANDARD PROCEDURE
STANDARD PROCEDURE - LIFTGATE
ADJUSTMENT
In order for the power liftgate system to function
properly the liftgate must move freely and smoothly.
The power liftgate system can acommodate for some
minor changes in the effort required to move the lift-
gate. However, in extreme conditions the liftgate may
need to be mechanicaly adjusted for proper fit and
finish. Refer to the Liftgate Adjustment procedure in
the Body section of the service manual for detailed
instructions.
If a problem exists with the power liftgate and it is
suspected to be extreme effort check the liftgate prop
rods and hinges for free movement. Use a known
good vehicle for liftgate effort comparison.
NOTE: Routine application of Mopar MP-50
T
or
equivalent on the chrome prop rod shafts and lift-
gate latch and hinges will help keep the liftgate in
good working order.
STANDARD PROCEDURE - POWER LIFTGATE
LEARN CYCLE
Any time a power liftgate component is removed,
replaced or a liftgate adjustment is performed a learn
cycle must be performed. This learn cycle enables the
power liftgate control module to learn or relearn
information (travel limits, resistance to door travel,
etc.) which allows it to perform properly and safely.
To perform a learn cycle do the following:
(1) Obtain a DRBIII
t scan tool.
(2) Connect the DRBIII
t to the vehicle and check
for any power liftgate system stored trouble codes,
correct and erase any stored codes.
(3) Using the DRBIII
t, Go into Test Routine Menu
and select the power open command.
(4) Select the power close command.
(5) The liftgate learn cycle is complete.
If a DRBIII
t scan tool is not available, the learn
cycle can be performed by actuating the liftgate using
any of the normal command switches. Be certain to
cycle the liftgate through a complete open and close
cycle before returning the vehicle to service.
NOTE: If the power liftgate will not complete a full
cycle a problem exists with the power liftgate sys-
tem. (Refer to 8 - ELECTRICAL/POWER DOORS -
DIAGNOSIS AND TESTING).
SPECIFICATIONS
SPECIFICATIONS TABLE
TORQUE SPECIFICATIONS
DESCRIPTION
N·m
Ft. Lbs.
In. Lbs.
Liftgate Motor
10
7
85
Pinch Sensor
3
2
25
Transverse Bracket
10
7
85
Lift Gear Bolts
8
6
71
Link Rod to Liftgate
28
21
250
Liftgate Latch
10
8
90
RS
POWER LIFTGATE SYSTEM
8N - 9
POWER LIFTGATE SYSTEM (Continued)
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