
(5) Install push in fasteners attaching upper bol-
ster to child restraint seat module (Fig. 2).
(6) Return seat back to folded position.
(7) Install seat back cover.
(8) Verify child restraint seat operation.
SYNCHRONIZING CABLE ADJUSTMENT
NOTE:
Bench seats equipped with child restraint seats
have an interlock feature that will not allow the seat
back to fold forward with the child seat open.
If the seat back hinges do not release at the same
time the synchronizing cable must be adjusted.
(1) Remove seat from vehicle. Refer to Owner's
Manual for proper procedures.
(2) Disengage cable from the recline mechanism by
pulling the cable end toward the front of the seat
(Fig. 6).
(3) Pull U-shaped locking tab on self-adjusting
mehcanism to disengage auto-adjust feature.(4) Reattach self-adjusting mechanism, pulling
against spring load to tighten cable.
(5) Press locking tab onto the adjusting mecha-
nism to lock into place.
Fig. 4 Child Restraint Seat Module
1 - 1ST REAR SEAT BACK
2 - CHILD RESTRAINT SEAT MODULE
3 - SEAT BACK HINGE INTERLOCK LEVER
Fig. 5 Interlock Lever
1 - CHILD RESTRAINT SEAT HINGE
2 - SEAT BACK HINGE INTERLOCK LEVER
3 - 1ST REAR SEAT BACK
4 - SEAT BACK FRAME RAIL
Fig. 6 SYNCHRONIZING CABLE
1 - CABLE END
2 - LOCKING TAB
3 - SETBACK HINGE
23 - 224 SEATSRS
CHILD SEAT MODULE (Continued)
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(2) Remove the armrest. (Refer to 23 - BODY/
SEATS/ARMREST - REMOVAL).
(3) Remove the seatback recliner lever.
(4) Remove the lumbar adjustment lever.
(5) Remove both seat cushion side covers. (Refer to
23 - BODY/SEATS/FRONT SEAT CUSHION SIDE
COVER - REMOVAL).
(6) Remove nut attaching the recliner to the seat-
back frame (Fig. 15).
(7) Remove both pivot bolts and remove seatback
from recliner.
INSTALLATION
(1) Place seat back into position.
(2) Install both pivot bolts attaching seat back
frame to seat track. Tighten bolts to 54 N´m (40 ft.
lbs.) torque.
(3) Install nut attaching the recliner to the seat
back frame. Tighten nut to 12 N´m (105 in. lbs.)
torque.
(4) Install both seat cushion side covers. (Refer to
23 - BODY/SEATS/FRONT SEAT CUSHION SIDE
COVER - INSTALLATION).
(5) Install the lumbar adjustment lever.
(6) Install the seat back recliner lever.
(7) Install the armrest. (Refer to 23 - BODY/
SEATS/ARMREST - INSTALLATION).(8) Install headrest sleeves. (Refer to 23 - BODY/
SEATS/HEADREST SLEEVE - INSTALLATION).
FRONT SEATBACK ASSIST
STRAP
REMOVAL
(1) Using a small screw driver, pry screw plugs
from ends of assist strap (Fig. 16).
(2) Remove screws attaching assist strap to seat-
back.
(3) Remove assist strap from vehicle.
INSTALLATION
(1) Place assist strap in position on vehicle.
(2) Install screws attaching assist strap to seat
back. Tighten screws to 2.5 N´m (22 in. lbs.).
(3) Insert screw plugs into ends of assist strap
(Fig. 16).
FRONT SEATBACK PANEL
REMOVAL
(1) Remove the screws (Fig. 17).
(2) Tip the top of the panel away from the seat
back and lift off the hooks at the bottom to remove.
INSTALLATION
(1) Place seat back cover onto the seat and engage
the bottom hooks.
Fig. 15 FRONT SEATBACK
Fig. 16 FRONT SEATBACK ASSIST STRAP
1 - ASSIST STRAP
2 - SCREW PLUG
3 - SEAT BACK
23 - 228 SEATSRS
FRONT SEATBACK (Continued)
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(5) Install bolts attaching seat back hinge to seat
cushion frame. Tighten bolts to 48 N´m (35 ft. lbs.)
torque.
(6) Install shoulder bolts attaching seat back hinge
to seat back frame (Fig. 38). Tighten nuts to 34 N´m
(25 ft. lbs.) torque.(Refer to 23 - BODY/SEATS/
BENCH SEAT BACK - INSTALLATION).
(7) Install bench seat back hinge covers. (Refer to
23 - BODY/SEATS/SEAT BACK HINGE COVERS -
50/50 SPLIT, BENCH - INSTALLATION).
(8) Verify seat back hinge operation and adjust
synchronizing cable, if equipped. (Refer to 23 -
BODY/SEATS/SYNCHRONIZING CABLE ADJUST-
MENT).
SYNCHRONIZING CABLE ADJUSTMENT
NOTE:
Bench seats equipped with child restraint seats
have an interlock feature that will not allow the seat
back to fold forward with the child seat open.
If the seat back hinges do not release at the same
time the synchronizing cable must be adjusted.
(1) Remove seat from vehicle. Refer to Owner's
Manual for proper procedures.
(2) Disengage cable from the recline mechanism by
pulling the cable end toward the front of the seat
(Fig. 39).
(3) Pull U-shaped locking tab on self-adjusting
mehcanism to disengage auto-adjust feature.
(4) Reattach self-adjusting mechanism, pulling
against spring load to tighten cable.
(5) Press locking tab onto the adjusting mecha-
nism to lock into place.
BENCH SEAT BACK
REMOVAL
NOTE: Bench seats equipped with child restraint
seats have an interlock feature that will not allow
the seat back to fold forward with the child seat
open.
(1) Remove the headrests. (Refer to 23 - BODY/
SEATS/HEADREST - REMOVAL).
(2) Remove the armrests, if equipped. (Refer to 23
- BODY/SEATS/ARMREST - REMOVAL).
(3) Remove the upper hinge cover. (Refer to 23 -
BODY/SEATS/SEAT BACK HINGE COVERS -
REMOVAL).
(4) Disengage synchronizing cable housing from
seat back hinge, if equipped.
(5) Disengage synchronizing cable end from (clip
on left side) hinge latch release arm, if equipped.(6) Remove shoulder bolts attaching seat back
hinge to seat back frame (Fig. 40).
(7) Remove the seat back.
Fig. 39 SYNCHRONIZING CABLE
1 - CABLE END
2 - LOCKING TAB
3 - SETBACK HINGE
Fig. 40 SEAT BACK HINGE ± TYPICAL
1 - SEATBACK FRAME BOLTS
2 - SEAT CUSHION FRAME BOLTS
3 - SEATBACK HINGE
RSSEATS23 - 239
BENCH SEAT BACK HINGE (Continued)
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INSTALLATION
NOTE: Bench seats equipped with child restraint
seats have an interlock feature that will not allow
the seat back to fold forward with the child seat
open.
(1) Install the seat back.
(2) Install the shoulder bolts attaching the seat
back hinge to the seat back frame and tighten to 34
N´m (25 ft. lbs.) torque.
(3) Connect the synchronizing cable end from (clip
on left side) hinge latch release arm, if equipped.
(4) Connect the synchronizing cable housing to the
seat back hinge, if equipped.
(5) Install the upper hinge cover. (Refer to 23 -
BODY/SEATS/SEAT BACK HINGE - INSTALLA-
TION).
(6) Install the armrests, if equipped. (Refer to 23 -
BODY/SEATS/ARMREST - INSTALLATION).
(7) Install the headrest sleeves. (Refer to 23 -
BODY/SEATS/HEADREST SLEEVE - INSTALLA-
TION).
(8) Adjust synchronizing cable, if equipped. (Refer
to 23 - BODY/SEATS/SYNCHRONIZING CABLE
ADJUSTMENT).
BENCH SEAT BACK COVER
REMOVAL
(1) Remove the bench seat back. (Refer to 23 -
BODY/SEATS/BENCH SEAT BACK - REMOVAL).
(2) Remove the bench seatback panel. (Refer to 23
- BODY/SEATS/BENCH SEATBACK PANEL -
REMOVAL).
(3) Disconnect the cover J-straps.
(4) Remove the seat back cover from the seat back
assembly.
INSTALLATION
(1) Install seat back cover onto the seat back
frame and cushion assembly.
(2) Connect the J-straps.
(3) Install the bench seatback panel. (Refer to 23 -
BODY/SEATS/BENCH SEATBACK PANEL -
INSTALLATION).
(4) Install the seat back. (Refer to 23 - BODY/
SEATS/BENCH SEAT BACK - INSTALLATION).
BENCH SEAT TRACK
REMOVAL
(1) Remove second row seat from vehicle. Refer to
Owner's Manual for proper procedure.(2) Place seat on clean covered work surface.
(3) Disengage seat track adjuster link wire from
track being removed.
(4) Remove nuts attaching track to seat riser (Fig.
41).
(5) Remove track from seat riser.
INSTALLATION
(1) Place track in position on seat riser.
(2) Install nuts attaching track to seat riser. (Fig.
41). Tighten nuts to 48 N´m (35 ft. lbs.) torque.
(3) Engage seat track adjuster link wire onto track
being installed.
(4) Install second row seat into vehicle.
Fig. 41 BENCH SEAT TRACK
1 - SEAT TRACK ADJUSTER LINK
2 - RISER
3 - SEAT TRACK NUTS
4 - SEAT TRACK
5 - RISER BOLTS
23 - 240 SEATSRS
BENCH SEAT BACK (Continued)
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²an air conditioning button that allows the com-
pressor to be turned on/off. The Snowflake button
contains an LED that illuminates to shown when the
function is in operation.
²rotary knobs for front and rear fan speed selec-
tion.
²a rotary knob for mode control.
REAR CONTROL PANEL
A rear control panel centrally mounted on the
headliner has a rotary adjustment for temperature
and fan speed control of the rear unit by intermedi-
ate seat passengers when the front control rear knob
is set to the rear position.
DESCRIPTION - THREE ZONE Automatic
Temperature Control
The Three-Zone Automatic Temperature Control
(ATC) allows occupants to select a comfort tempera-
ture, which is the perceived temperature level not
the actual passenger compartment air temperature.
The Three Zone Automatic Temperature Control
system includes a dust and odor air filter. The filter
element is the same size as the air conditioning evap-
orator to ensure ample capacity. A door at the base of
the heater and air conditioning housing below the
glove box provides easy access to the filter element.
The ATC computer utilizes integrated circuitry and
information carried on the Programmable Communi-
cations Interface (PCI) data bus network to monitor
many sensors and switch inputs throughout the vehi-
cle. In response to those inputs, the internal circuitry
and programming of the ATC computer allow it to
control electronic functions and features of the ATC
system. The inputs to the ATC computer are:
²Vehicle Speed/Engine RPM± The ATC com-
puter monitors engine RPM, vehicle speed and Man-
ifold Absolute Pressure information from the PCM.
²Coolant Temperature± ATC computer moni-
tors Coolant temperature received from the PCM and
converts it to degrees Fahrenheit.
²Ambient Temperature± ATC computer moni-
tors Ambient temperature from the Compass Mini
Trip Computer (CMTC) and converts it to degrees
Fahrenheit.
²Engine Miscellaneous Sensor Status±ATC
computer monitors A/C disable information from the
PCM.
²Refrigerant Pressure± ATC computer moni-
tors Barometric Pressure, Intake Air Temperature,
High Side Pressure and Methanol Content as broad-
cast by the PCM.
²Door Ajar Status± The ATC computer moni-
tors Driver Front Door, Passenger Front Door, Left
Rear Door, Right Rear Door and Liftgate ajar infor-
mation, as identified by the Body Control Module(BCM), to determine if all in-car temperatures should
be maintained.
²Dimming± The ATC computer monitors dim-
ming status from the BCM to determine the required
level of brightness and will dim accordingly.
²Vehicle Odometer± The ATC computer moni-
tors the vehicle odometer information from the BCM
to prevent flashing the VF tube icons if the manual
motor calibration or manual cooldown tests have
failed. Flashing of the display icons will cease when
the vehicle odometer is greater than 3 miles.
²English Metric± The ATC computer monitors
the English/Metric information broadcast by the
CMTC. The set temp displays for both the front and
rear control heads will be set accordingly.
²Vehicle Identification Number± The ATC
computer monitors the last eight characters of the
VIN broadcast by the PCM and compares it to the
information stored in EEPROM. If it is different, the
new number will be stored over the old one and a
motor calibration shall be initiated.
²A/C System Information± The ATC computer
will send a message for Evaporator Temperature too
Low, Fan Blower Relay status, Evaporator Sensor
Failure, Rear Window Defogger Relay and A/C Select.
FRONT CONTROL PANEL
The front control panel and integral computer is
mounted in the instrument panel.
The instrument panel mounted control and inte-
gral computer contains:
²A power button which allows the system to be
completely turned off. The display is blank when the
system is off.
²Three rocker switches that select comfort tem-
peratures from 15É to 30É C (59É to 85É F), which are
shown in the vacuum-fluorescent digital control dis-
play. If the set temp is 59 and the down button is
pressed, the set temp value will become 55 but the
display will show LO. If the set temp is 85 and the
up button is pressed, the set temp value will become
90 but the display will show HIGH. Temperatures
can be displayed in either metric or fahrenheit,
which is controlled from the overhead console.
²A rocker switch that selects a cool-down rate.
LO-AUTO or HI-AUTO are displayed when the sys-
tem is in automatic operation.
²A defroster button which turns on the defroster
independently during full automatic control. A
defroster symbol illuminates in the display when the
button is pressed.
²Air recirculation button. A Recirculation symbol
appears in the display when the button is pressed, or
when the system exceeds 80 percent circulated air
under automatic control due to high air conditioning
demand.
24 - 2 HEATING & AIR CONDITIONINGRS
HEATING & AIR CONDITIONING (Continued)
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²Rear window defogger on/off switch. A graphic
symbol shows when the defroster is on.
²An air conditioning button that allows the com-
pressor to be turned off. A Snowflake symbol is illu-
minated when air conditioning is on, whether under
manual or automatic control.
²Rotary knob for front fan speed selection can
override the automatic controls. LEDs surrounding
the knob show the current setting.
²Rotary knob for control of the Rear system.
²A rotary knob for mode control can override the
automatic controls. LEDs surrounding the knob show
the current setting.
²Computer logic remembers the settings of the
controls when the ignition is turned off and retains
those settings after a restart. If the system is off
when the ignition is turned of, it will be off when the
engine is restarted, etc.
²Computer logic provides variable air recircula-
tion under high temperature and humidity condi-
tions. Because recirculation is generally accompanied
by increased fan noise, the proportion of recirculated
to outside air gradually approaches full recirculation
over a broad temperature range.
²A graphic symbol of the windshield that illumi-
nates when the windshield wiper deicer is active.
REAR CONTROL PANEL
A rear control panel centrally mounted on the
headliner includes a vacuum-flourescent digital dis-
play, a rocker control for temperature and rotary con-
trols for adjustment of mode and fan speed control of
the rear unit by intermediate seat passengers.
OPERATION - DUAL ZONE
²The mode control knob enables continously vari-
able proportioning of air flow between modes but has
detents adjacent to each icon.
²The blower control provides five separate speeds.
²When the fan is off, the HVAC computer closes
the recirculation door to prevent outside air from
entering the passenger compartment.
²Interior air may be recirculated to speed up
heating or cooling in all modes exccept defrost and
mix by pressing the Recirculate button on the control
panel.
²To reduce humidity for rapid defogging the A/C
compressor runs automatically in modes from ªmix'
to full defrost when outside temperautres are above
freezing.
²Air conditioning is available in any mode by
pressing the snowflake, A/C on/off, button.
OPERATION - MANUAL THREE ZONE
FRONT CONTROL PANEL
²Primary control of the rear compartment unit is
on the instrument panel. This control allows the
driver to set the rear compartment fan speed, to turn
the rear unit off, or to give control to the intermedi-
ate seat occupants by switching to the REAR posi-
tion. When the rear unit is controlled from the
instrument panel, rear air temperature is based on
the driver-side temperature control position, and the
mode (floor or overhead air) is based on the front
control's mode position.
²The mode control knob enables continously vari-
able proportioning of air flow between modes but has
detents adjacent to each icon.
²The blower control provides five separate speeds
and Off. When the fan is off, the HVAC computer
closes the recirculation door to prevent outside air
from entering the passenger compartment.
²Interior air may be recirculated to speed up
heating or cooling in all modes exccept defrost and
mix by pressing the Recirculate button on the control
panel.
²To reduce humidity for rapid defogging the A/C
compressor runs automatically in modes from ªmix'
to full defrost when outside temperautres are above
freezing.
²Air conditioning is available in any mode by
pressing the snowflake, A/C on/off, button.
REAR CONTROL PANEL
With the rear control active, temperature selection
dictates indirectly the mode (floor or overhead air) of
the rear unit: a low temperature setting directs flow
to the overhead outlets and a high temperature set-
ting to the floor.
OPERATION - THREE ZONE ATC
Comfort temperature or perceived temperature is
affected by air flow, sun impinging on exposed skin,
etc. The air temperature may be higher or lower than
the comfort temperature. Three infrared sensors, two
in the instrument panel center stack, and one in the
overhead-mounted rear control panel, independently
measure the temperature of the driver, front passen-
ger, and rear compartment occupants to determine
their comfort level relative to the selected comfort
temperature. The HVAC computer in the control
module adjusts the air flow rate and temperature to
maintain the customer-perceived comfort tempera-
ture. The air temperature in the passenger compart-
ment at any time may be slightly higher or lower
than the comfort temperature. For instance, on
sunny summer days the air flow will probably be
cooler than the comfort temperature; on cold or
RSHEATING & AIR CONDITIONING24-3
HEATING & AIR CONDITIONING (Continued)
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PCV VALVE
DESCRIPTION
The PCV valve contains a spring loaded plunger.
The plunger meters the amount of crankcase vapors
routed into the combustion chamber based on intake
manifold vacuum.
OPERATION
When the engine is not operating or during an
engine backfire, the spring forces the plunger back
against the seat. This prevents vapors from flowing
through the valve (Fig. 8).
When the engine is at idle or cruising, high mani-
fold vacuum is present. At these times manifold vac-
uum is able to completely compress the spring and
pull the plunger to the top of the valve (Fig. 9). In
this position there is minimal vapor flow through the
valve.During periods of moderate intake manifold vac-
uum the plunger is only pulled part way back from
the inlet. This results in maximum vapor flow
through the valve (Fig. 10).
DIAGNOSIS AND TESTING - PCV SYSTEM
INSPECTION
WARNING: APPLY PARKING BRAKE AND/OR
BLOCK WHEELS BEFORE PERFORMING ANY TEST
OR ADJUSTMENT WITH THE ENGINE OPERATING.
(1) With engine idling, remove the hose from the
PCV valve. If the valve is not plugged, a hissing
noise will be heard as air passes through the valve. A
strong vacuum should also be felt when a finger is
placed over the valve inlet.
(2) Install hose on PCV valve. Remove the
make-up air hose from the air plenum at the rear of
the engine. Hold a piece of stiff paper (parts tag)
loosely over the end of the make-up air hose.
(3)
After allowing approximately one minute for
crankcase pressure to reduce, the paper should draw up
against the hose with noticeable force. If the engine
does not draw the paper against the grommet after
installing a new valve, replace the PCV valve hose.
(4)Turn the engine off. Remove the PCV valve from
intake manifold. The valve should rattle when shaken.
(5) Replace the PCV valve and retest the system if
it does not operate as described in the preceding
tests.Do not attempt to clean the old PCV valve.
If the valve rattles, apply a light coating of Loctitet
Pipe Sealant With Teflon to the threads. Thread the
PCV valve into the manifold plenum and tighten to 7
N´m (60 in. lbs.) torque.
Fig. 7 PCV VALVE 2.4L
1 - PCV Valve
Fig. 8 Engine Off or Engine Backfire No Vapor Flow
Fig. 9 High Intake Manifold Vacuum Minimal Vapor
Flow
Fig. 10 Moderate Intake Manifold Vacuum Maximum
Vapor Flow
RSEVAPORATIVE EMISSIONS25-17
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