Chrysler Pacifica. Manual — part 522
INSTALLATION
(1) Position the seat switch onto the door trim
panel. Press into place ensuring all four clips are
engaged.
(2) Reconnect the wire harness connector to the
door module.
(3) Install the front door trim panel. Refer to the
Body section for the procedure.
(4) Reconnect the battery negative cable.
DRIVER POWER SEAT TRACK
DESCRIPTION
The power seat option includes a electrically oper-
ated power seat track and motor assembly. One seat
track assembly is located under each front seat. The
driver side power seat track also provides the mount-
ing location for the memory heated seat adjustable
pedal module on this vehicle. The lower half of the
power seat track is secured to the floor panel via four
studs and nuts that must be accessed from the
underside of the vehicle. Four bolts secure the bot-
tom of the seat cushion pan to the upper half of the
power seat track unit. Four additional bolts secure
the seat back frame to the power seat track unit.
The power seat track unit includes four reversible
electric motors that are secured to the upper half of
the track unit. Each motor moves the seat track
through a combination of worm-drive gearboxes and
screw-type drive units. Each of the power seat track
motors incorporates a integral position potentiometer,
which allows the memory heated seat adjustable
pedal module to monitor the motor position. This
enables the memory system to function by referenc-
ing the motor positions programmed into the module.
The front and rear of the seat are operated by two
separate vertical adjustment motors. These motors
can be operated independently of each other, tilting
the entire seat assembly forward or rearward; or,
they can be operated in unison by selecting the
proper power seat switch functions, which will raise
or lower the entire seat assembly. A third motor is
the horizontal adjustment motor, which moves the
seat track in the forward and rearward directions.
The forth motor is the recliner adjustment motor,
which moves the seat back in the forward and rear-
ward directions.
The power seat track unit cannot be repaired, and
is serviced only as a complete unit. If any component
in this unit is faulty or damaged, the entire power
seat track unit must be replaced.
OPERATION
When a power seat switch control knob is actuated,
a resistance signal is sent to the Driver Door Module
via hard wired connections. The driver door module
then sends the request to the Memory Heated Seat
Adjustable Pedal Module (MHSAPM) via the PCI
data bus circuit. The MHSAPM is responsible for the
12v battery feed and ground path to the power seat
track adjuster motor. The selected adjuster motor
operates to move the seat track or recliner through
its drive unit in the selected direction until the
switch is released, or until the travel limit of the
adjuster is reached.
DIAGNOSIS AND TESTING - DRIVER POWER
SEAT TRACK
The most reliable, efficient, and accurate means to
diagnose the power seat track requires the use of a
DRB III
t scan tool and the Diagnostic Procedures
information. The DRB III
t scan tool can provide con-
firmation that the PCI data bus is functional, that all
of the electronic modules are sending and receiving
the proper messages on the PCI data bus network,
and that the power seat system is receiving the
proper hard wired inputs and relaying the proper
hard wired outputs to perform its functions.
Following are tests that will help to diagnose the
hard wired components and circuits of the power seat
system.
PRELIMINARY TESTS
(1) Obtain a DRB III
t scan tool and check for any
stored diagnostic trouble codes recorded in the mem-
ory heated seat adjustable pedal module. Follow the
procedures called out in the proper diagnostic proce-
dures manual to resolve if codes are present.
(1) If any power seat is not operational in any
direction, check the power seat circuit breaker,
located in the Integrated Power Module. If OK, go to
Step 2. Refer to the Power Distribution section for
circuit breaker diagnosis and testing procedure.
(2) Check for proper battery or electrical system
voltage. The CS is equipped with a low-voltage cut-
off feature. If the electrical system voltage drops
below a predetermined set-point (approx. 11.5v), the
power seat system will not function until the proper
system voltage has been restored. If OK, go to Step
4. Refer to the Battery System and/or Charging Sys-
tem section for testing instructions.
(3) Obtain a DRB III
t scan tool and energize each
seat track motor axis one at a time. If any axis stops
without hitting the end of travel, the potentiometer
signal for that axis may have an open, short or be
mis-wired. Check the wiring to that axis (module to
motor). Fix any wiring problems and retry that axis.
If a certain seat track motor is inoperational, apply
12v and a good ground source to the inop motor. If
the motor does not operate in either direction replace
CS
POWER SEAT SYSTEM
8N - 29
DRIVER SEAT SWITCH (Continued)
the power seat track assembly. Refer to Wiring for
complete circuit diagrams.
REMOVAL
(1) Remove the drivers seat from the vehicle and
place it on a clean work surface (Refer to 23 - BODY/
SEATS/SEAT - REMOVAL).
(2) Remove the memory heated seat adjustable
pedal module retaining screws.
(3) Disconnect the module electrical connectors
and remove the module from the power seat track.
(4) Remove the rear fabric blocker trim panel from
the rear of the front seat.
(5) Remove the seat side cover assembly (Refer to
23 - BODY/SEATS/SEAT CUSHION SIDE COVERS -
REMOVAL).
(6) Disconnect all electrical connectors connecting
the power seat track to the seat assembly.
(7) Pull the seat back trim cover up slightly to
access and remove the two seat back frame mounting
bolts and also remove two seat back recliner bolts.
(8) Remove four seat track mounting bolts from
the seat cushion pan.
(9) Remove the power seat track from the seat.
INSTALLATION
(1) Position the seat cushion on the seat track.
(2) Install the four seat track retaining bolts in the
seat cushion pan. Torque the bolts to 28.5 N·m.
(3) Position the seat back and install the two seat
back frame mounting bolts and the two seat back
recliner bolts. Torque the bolts to 55 N·m.
(4) Route and connect the electrical connectors
between the power seat track and the seat assembly.
(5) Install the seat side cover assembly (Refer to
23 - BODY/SEATS/SEAT CUSHION SIDE COVERS -
INSTALLATION).
(6) Install the rear fabric blocker trim panel on the
rear of the front seat.
(7) Position the memory heated seat adjustable
pedal module and connect the module electrical con-
nectors.
(8) Install the memory heated seat adjustable
pedal module retaining screws.
(9) Install the seat assembly in the vehicle (Refer
to 23 - BODY/SEATS/SEAT - INSTALLATION).
LUMBAR MOTOR
DESCRIPTION
The power seat system includes an electrically
operated lumbar support mechanism. The power
lumbar adjuster and motor are concealed beneath the
seat back trim cover and padding, where they are
secured to the seat back frame.
The power lumbar adjuster mechanism includes a
reversible electric motor that is secured to the
inboard side of the seat back frame and is connected
to cable. The motor driven cable operates the lumbar
adjuster mechanism in the center of the seat back by
extending and retracting the lumbar mechanism.
This action compresses or relaxes a grid of flexible
slats. The more this grid is compressed, the more the
slats bow outward against the center of the seat back
padding, providing additional lumbar support.
The power lumbar motor and adjuster cannot be
repaired, and is serviced only as a complete unit. If
the power lumbar motor or adjuster are damaged or
faulty,
the
entire
lumbar
mechanism
must
be
replaced.
OPERATION
When the lumbar switch control knob is actuated,
a resistance signal is sent to the Driver Door Module
via hard wired connections. The driver door module
then sends the request to the Memory Heated Seat
Adjustable Pedal Module (MHSAPM) via the PCI
data bus circuit. The MHSAPM is responsible for the
12v battery feed and ground path to the power seat
lumbar adjuster motor. The lumbar adjuster motor
operates to move the cable and lumbar mechanism
through its travel until the switch is released, or
until the travel limit of the adjuster is reached.
DIAGNOSIS AND TESTING - LUMBAR MOTOR
The most reliable, efficient, and accurate means to
diagnose the power seat system requires the use of a
DRB III
t scan tool and the proper Diagnostic Proce-
dures information. The DRB III
t scan tool can pro-
vide confirmation that the PCI data bus is functional,
that the electronic modules are sending and receiving
the proper messages on the PCI data bus network,
and that the power seat system is receiving the
proper hard wired inputs and relaying the proper
hard wired outputs to perform system functions.
Following are tests that will help to diagnose the
components and circuits in the power seat system.
However, these tests may not prove conclusive. In
order to obtain conclusive testing of the power seat
system, the Programmable Communications Interface
(PCI) data bus network must be checked.
PRELIMINARY TESTS
(1) Obtain a DRB III
t scan tool and check for any
stored diagnostic trouble codes recorded in the mem-
ory heated seat adjustable pedal module. Follow the
procedures called out in the proper diagnostic proce-
dures manual to resolve if codes are present.
(1) If any power seat is not operational in any
direction, check the power seat circuit breaker,
located in the Integrated Power Module. If OK, go to
8N - 30
POWER SEAT SYSTEM
CS
DRIVER POWER SEAT TRACK (Continued)
Step 2. Refer to the Power Distribution section for
circuit breaker diagnosis and testing procedure.
(2) Check for proper battery or electrical system
voltage. The CS is equipped with a low-voltage cut-
off feature. If the electrical system voltage drops
below a predetermined set-point (approx. 11.5v), the
power seat system will not function until the proper
system voltage has been restored. If OK, go to Step
4. Refer to the Battery System and/or Charging Sys-
tem section for testing instructions.
(3) Obtain a DRB III
t scan tool and energize each
seat track motor axis one at a time. If any axis stops
without hitting the end of travel, the potentiometer
signal for that axis may have an open, short or be
mis-wired. Check the wiring to that axis (module to
motor). Fix any wiring problems and retry that axis.
If a lumbar motor is inoperational, apply 12v and a
good ground source to the inop motor. If the motor
does not operate in either direction replace the power
lumbar assembly. Refer to Wiring for complete circuit
diagrams.
REMOVAL
(1) Disconnect and isolate the negative battery
cable.
(2) Remove the drivers seat from the vehicle. Refer
to the Body section for detailed instructions.
(3) Remove the seat back trim cover and foam.
Refer to the Body section for detailed instructions.
(4) Disconnect the lumbar motor electrical connec-
tor.
(5) Unhook the top of the lumbar mechanism
assembly from the seat back frame.
(6) Unhook the bottom of the lumbar mechanism
assembly from the seat back frame and remove the
lumbar motor and lumbar mechanism as an assem-
bly.
INSTALLATION
(1) Hook the bottom of the lumbar mechanism
assembly on the seat back frame.
(2) Hook the top of the lumbar mechanism assem-
bly on the seat back frame.
(3) Connect the lumbar motor electrical connector.
(4) Install the seat back foam and trim cover.
Refer to the Body section for detailed instructions.
(5) Install the drivers seat in the vehicle. Refer to
the Body section for detailed instructions.
(6) Connect the negative battery cable.
(7) Verify correct seat lumbar operation.
LUMBAR CONTROL SWITCH
DESCRIPTION
The lumbar control switch is one of eight separate
switches ganged together in driver seat switch
assembly. The switch is located on the drivers front
door trim panel (Fig. 2). The driver seat switch
assembly can provide up to six resistive multiplexed
inputs into the driver door module. The inputs can
include memory, heated seat, power seat, and foot
pedal system requests. All inputs are hardwired
resistive mux to the driver door module to decode
axis direction or seat heat level. Refer to Driver Door
or Memory Heated Seat Adjustable Pedal Modules in
the Electronic Control Modules section for additional
information.
The power lumbar switch cannot be adjusted or
repaired and, if faulty or damaged, the complete
driver seat switch assembly must be replaced.
OPERATION
When the lumbar control switch is moved forward
or rearward, a resistance signal is sent to the Driver
Door Module via hard wired connections. The driver
door module then sends the request to the Memory
Heated Seat Adjustable Pedal Module (MHSAPM)
Fig. 2 CS Driver Seat Switch Assembly
1 - Memory Position #2
2 - Memory Position #1
3 - Memory Set Switch
4 - Power Seat Recline Switch
5 - Power Lumbar Switch
6 - Adjustable Foot Pedal Switch
7 - Power Seat Cushion Switch
CS
POWER SEAT SYSTEM
8N - 31
LUMBAR MOTOR (Continued)
via the PCI data bus circuit. The MHSAPM is
responsible for controlling the 12v battery feed and
ground path to the lumbar motor to control the seat
back power lumbar mechanism accordingly.
DIAGNOSIS AND TESTING - LUMBAR
CONTROL SWITCH
(1) The lumbar control switch used on CS vehicles
is incorporated into the driver seat switch assembly.
For diagnostic routine (Refer to 8 - ELECTRICAL/
POWER SEATS/DRIVER SEAT SWITCH - DIAGNO-
SIS AND TESTING).
MEMORY SET SWITCH
DESCRIPTION
The memory set switch is one of eight separate
switches ganged together in driver seat switch
assembly. The switch is located on the drivers front
door trim panel (Fig. 3). The memory set switch will
flash red when pressed until a position button is
pressed or it times out. The driver seat switch assem-
bly can provide up to six major resistive multiplexed
inputs into the driver door module. The inputs can
include memory, heated seat, seat front up/down and
foot pedal forward, seat rear up/down and pedal
backwards, seat forward/backward and lumbar aft.,
recline forward/backward and lumbar backwards. All
inputs are hardwired resistive mux to the driver door
module to decode axis direction or seat heat level.
Refer to Driver Door or Memory Heated Seat Adjust-
able Pedal Modules in the Electronic Control Mod-
ules section for additional information.
The memory set switch cannot be adjusted or
repaired and, if faulty or damaged, the complete
driver seat switch assembly must be replaced.
OPERATION
When any of the memory switches are depressed, a
resistance signal is sent to the Driver Door Module
via hard wired connections. The memory set switch
LED will flash red when pressed until a position but-
ton is pressed or the system times out. The driver
door module then sends the request to the Memory
Heated Seat Adjustable Pedal Module (MHSAPM)
via the PCI data bus circuit. The MHSAPM is
responsible for controlling the 12v battery feed and
ground path to the power seat track or adjustable
pedal motor(s) to control the seat or pedal assembly
accordingly.
DIAGNOSIS AND TESTING - MEMORY SET
SWITCH
(1) The memory set switch used on CS vehicles is
incorporated into the driver seat switch assembly.
For diagnostic routine (Refer to 8 - ELECTRICAL/
POWER SEATS/DRIVER SEAT SWITCH - DIAGNO-
SIS AND TESTING).
Fig. 3 CS Driver Seat Switch Assembly
1 - Memory Position #2
2 - Memory Position #1
3 - Memory Set Switch
4 - Power Seat Recline Switch
5 - Power Lumbar Switch
6 - Adjustable Foot Pedal Switch
7 - Power Seat Cushion Switch
8N - 32
POWER SEAT SYSTEM
CS
LUMBAR CONTROL SWITCH (Continued)
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст