PONTIAC FIERO 1988 Service Repair Manual

9H-8 SEATS. F STYLE Bolt or Nut Location and Torque
6O FORWARD Many service replacement assemblies such as
OF VERTICAL front seat cushion and back frame assemblies and rear
compartment pan assembly may have unthreaded nuts
for attachment of seat adjusters,
seatback and lap belts.
Threads must be formed in these unthreaded nuts with
either the original or a new proper size thread forming
ANGLE METER bolt. Apply 67 to 89 newtons (15 to 20 pounds) of
straight-in pressure to start thread forming action of
bolt into an unthreaded nut.
NOTIICE: See NOTICE on page 9H-1 of this
section.
1. Seat adjuster-to-floor pan or adjuster-to-seat
frame bolts or nuts
- 20 to 28 N-m (15 to 21 ft-lb).
2. Front seatback outer control assembly to
seatback frame - 15 to 20 N-m (1 1 to 15 ft-lb).
3. Front
seatback frame to recliner mechanism - 20
to 28
N-m (15 to 21 ft-lb). I 4. Front seatback inner pivot hinge arm to seai
cushion frame - 20 to 28 N.m (15 to 21 ft-lb).
5. Rear folding
seatback panel pivot support to
outer bottom of
seatback - 46 N-m (34 ft-lb).
6. Rear folding
seatback lock bolt - 12 to 16 N.m
(9 to 12 ft-lb).
7. Rear folding
seatback lock striker to wheelhouse
- 46 N.m (34 ft-lb).
Fig. 18 - Front Seatback Inertia Lock Check - Out of Car 8. Seat
motor and transmission support attaching
bolts or nuts
- 9 to 15 N.m (7 to 11 ft-lb).
SEAT TORQUE SPECIFICATIONS 9. Passenger and driver retractor seat belt bolt to
quarter inner panel
- 35 to 48 N-m (26 to 35
ft-lb).
10. Passenger and driver seat buckle side belt to body
The following torque specifications should be
- 35 to 48 N.m (26 to 35 ft-lb).
used when servicing seat assemblies:
11. Passenger and driver inner seat belt to floor pan
- 35 to 48 N.m (26 to 35 ft-lb).
12. Shoulder belt anchor bolt to rocker panel
- 35 to
48
Nam (26 to 35 ft-lb).
13. Rear inner seat belt anchor bolt to floor pan
- 3'
to 48
Nqm (26 to 35 ft-lb).
14. Rear seat retractor assembly anchor bolt to floor
pan
- 35 to 48 N-m (26 to 35 ft-lb).
MANUAL SEAT ADJUSTER - DIAGNOSIS CHART
CONDITION APPARENTCAUSE CORRECTION
1. Adjuster will not 1. Locking wire
too
1. Loosen locking wire ten-
lock. tight. sion enough to provide full
engagement of lock bar in
locking slots of adjuster
lower channel.
2. Adjuster lock bar 2. Connect spring or
in-
spring disconnected stall new spring (Fig.
or broken. 23).
3. Adjuster lock bar 3. Lubricate lock bar
sticking or binding.
pivot. If bar is binding,
eliminate cause of binding
or replace adjuster.

SEATS - F STYLE 9H-9
2. Adjuster will not
unlock. 1. Locking wire too
loose or discon-
nected.
2. Adjuster lock bar
sticking or binding.
1. Tighten locking wire
enough to allow lock bar to
disengage from locking
slots in adjuster lower
channel when lock control
lever is activated.
2. Lubricate lock bar
pivot. If bar is binding,
eliminate cause of binding
or replace adjuster.
3. When left adjuster 1. Right adjuster either 1. Loosen adjuster-to-floor
locks, right adjuster rearward or forward of pan bolts or nuts. Move
is between lock posi- left adjuster. one adjuster forward or
tions. rearward
as far as possible
and the other adjuster the
opposite direction.
- --
Seat hard to moye
lorward or rearward.
1. Adjusters new, not
broken in.
2. Adjuster(s) improperly
lubricated.
3. Adjuster(s) binding
due to bent or damaged
channels.
4. Adjusters not in par-
allel alignment with each
other.
1. Operate seat to full
forward and full rearward
positions several times to
work new tightness out of
channels.
2. Lubricate adjuster chan-
nels with Lubriplate
Auto-
Lube A or equivalent.
3. Replace adjuster.
4. Loosen floor pan attach-
ing bolts or nuts, align
adjusters parallel on floor
pan and retighten nuts.
POWER SIX-WAY SEAMADJUSTER MECHANICAL DIAGNOSIS CHART
If it is apparent or suspected that the trouble is in the electrical system, refer to chassis manual Section 8A.
CONDITION APPARENT CAUSE CORRECTION
1. Horizontal operation 1. Improper lubrication 1. Lubricate adjuster upper
of seat not smooth of
adjuster shoes and
channel and plastic shoes.
(jerky)
- apparent hard channels.
operation.
2. Adjuster horizontal 2. See Horizontal
actuator gear too tight
Actuator Adjustment.
to rack gear.
3. Adjuster shoes too 3. Install new shoes on
tight in upper channel.
adjuster lower channel.
2. Horizontal chuck 1. Horizontal actuator 1. See Horizontal Actuator
or looseness. improperly adjusted to Adjustment.
rack gear.
3. One adjuster will 1. Horizontal drive cable 1. Check horizontal drive
not operate horizon- disconnected or damaged. cables, replace if damaged.
tally.
2. Horizontal actuator 2. Replace horizontal
inoperative. actuator assembly.

8'
9H-10 SEATS - F STYLE
4. One adjuster will 1. Vertical drive cable 1. Check vertical drive
not operate vertically. disconnected or damaged. cables, replace if damaged.
2. Vertical gearnut 2. Replace vertical
inoperative. actuator assembly.
5. Both adjusters will 1. Inoperative horizontal 1. See chassis manual
not operate horizon- and/or vertical solenoid Section
8A.
tally and/or verti- in transmission.
cally. 2. Damaged, broken or 2. Replace damaged, broken
inoperable solenoid or inoperable solenoid part
plunger, shaft, dog, dog
with new part.
spring, gear or drive
gear.
6. Vertical chuck or
1. Excessive clearance at
1. Grind down top of verti-
looseness. vertical
gearnut tension cal gearnut shoulder nut
spring. 0.40 to 1.19 mm
(1/64" to
3.64") maximum.
Front Seat Adjustments
Seat Adjustment at Floor Pan Attachment
A small amount of fore and aft or side adjustment
is available at the seat adjuster-to-floor pan attaching
bolts which can be used toward alignment of the seat
assembly or alignment of the seat adjusters with each
other. This adjustment can be used to help correct the
following conditions:
1. Nard or slow operation due to adjusters not being
parallel with each other.
2. Passenger side of manually operated seat must be
moved forward or rearward slightly to engage in
locked position due to one adjuster being forward
or rearward of the other.
3. Seat assembly slightly too far to right or left.
Power Six-Way Seat Adjuster Horizontal Actuator
Adjustment
With seat adjuster assembly installed on seat or
seat installed in body, horizontal movement (chucking)
can be corrected by adjusting the horizontal actuator
and pinion gear in tight to the adjuster lower track rack
gear as follows:
Adjust -
1. Operate seat to full-up position and about 3/4
full-forward position.
Loosen horizontal actuator attaching screws.
Using a large screwdriver, inserted as shown in
Figure
19, apply outward pressure on horizontal
actuator (enough to equal 67 to
11 1 newtons (15
to
25 pounds) on horizontal actuator) and at the
same time energize horizontal switch to move
seat fore and aft slightly; this helps seat the
horizontal actuator pinion gear teeth tight to the
lower track rack gear teeth and eliminate any free
play between gear teeth. While maintaining
outward pressure against horizontal actuator,
tighten actuator attaching screws.
APPLY PRESSURE SUFFICIENT
TO EQUAL
67 to 11 1 newtone
(15 to 26 Ib8.) ON HORIZONTAL
ACTUATOR
[HORIZONTAL ACTUATOR
ATTACHING SCREWS
POSITION ADJUSTER
WITH UPPER
TRACK SLIGHTLY REARWARD OF
LOWER TRACK AND CHECK (OBSERVE)
FOR HORIZONTAL CHUCK.
Fig. 19-Horizontal Actuator Adjustment - Power Six-Way
Seat
MANUAL SEAT ADJUSTER CONTROL ARM
KNOB
Manual seat adjuster control arm knobs are a
press fit on the adjuster control arm. The knobs can
generally be removed and reinstalled several times
without losing adequate retention. If removing or
installing a control knob on a trimmed seat assembly,
place a protective cover over trim material in area of
knob (Fig. 20).

SEATS - F STYLE 9N-11
Removal
To remove adjuster control knob, use body spoon
and locking type pliers as shown in Figure 20.
lnstallation
1. Make
pencil mark on seat adjuster control arm 25
mm
(1 ") from end of arm as a guide for full depth
fit.
2. Secure locking type pliers
to control arm below
pencil line.
3. Insert knob on arm and press firmly while
holding restraint with locking type pliers. If
necessary, use rubber mallet.
4. Gate marks on knob should face down on bucket
seats and to the rear on regular seats. Care should
be taken not to bend the control arm.
SQUEEZE IN '
DIRECTION OF
ARROW PROTECT
SEAT
TRIM
BODY
SPOON \\.,
I
LOCKING PLIERS -J
I
Fig. 20 - Front Seat Adjuster Control Arm Knob Removal
and lnstallation
FRONT SEAT ASSEMBLY - MANUAL AND
POWER SEATS
Seat assemblies are secured to the floor pan by
nuts installed on floor pan anchor plate studs.
The manually operated front seat assemblies have
manual seat adjusters to provide fore and aft movement
of the seat. When the control lever located at the front
of the seat is actuated to the left, the seat adjusters
unlock, permitting horizontal travel of the seat. When
the seat is in the desired position and the locking lever
is released, the seat is locked.
The power six-way seat adjusters are actuated by
three
12V, reversible, permanent magnet motors with
a built-in circuit breaker. The motors are energized by
a toggle-type control switch bolted on the seat side
panel (Fig. 2
1).
The three motors respectively direct drive the
front and rear vertical
gearnuts and a horizontal
actuator. When the adjusters reach the limit of travel,
their torque is absorbed through the rubber mounted
grommets between the motor and the support. An
overload relay is provided in the circuit should
excessive stall torque be applied to the motor.
Front seats are secured to the floor pan by nuts
installed into weld studs on floor pan anchor plates.
Removal and lnstallation
1. Operate seat to full-forward position. If six-way
power seat
is operable, operate seat to
full-forward and up positions. Where necessary to
gain access to adjuster-to-floor pan attaching
nuts, remove adjuster rear foot covers and/or
carpet retainers.
2. Remove track covers where necessary; then
remove adjuster-to-floor pan rear attaching nuts.
Operate seat to full-rearward position. Remove
adjuster front foot covers; then remove
adjuster-to-floor pan front attaching nuts.
On seats with power adjusters, tilt seat rearward
and disconnect feed wire connector.
3. Remove seat assembly from car.
4. Prior to installing seat assembly, check that both
seat adjusters are parallel and in phase with each
other. In the event the adjusters are out of phase
(one adjuster reaches its maximum horizontal or
vertical travel in a given direction before the other
adjuster), phase adjusters as described in step
5c
under Front Seat Adjuster Assembly - Removal
and Installation.
5. To install seat assembly, reverse removal
procedure.
6. Tighten seat adjuster-to-floor pan attaching bolts
or nuts 20 to 28
N.m (15 to 21 ft-lb). Check
operation of seat assembly to full limits of travel.
FRONT SEAT ADJUSTER ASSEMBLY -
MANUAL AND POWER
Removal and lnstallation
1. Remove front seat assembly with adjusters
attached and place upside down on a clean,
protected surface.
2. On manual seat adjusters, remove seat adjuster
assist spring from adjuster being removed. If
removing right adjuster, squeeze
hooked end of
seat adjuster locking wire together and slide
retaining spring over hump in locking wire and
remove locking wire from adjuster.
3. On power-operated seats, disconnect drive cables
at adjuster being removed by squeezing oblong
connector to detach.
4. Remove adjuster-to-seat bottom frame front and
rear attaching bolts or nuts and remove seat
adjuster from seat (Fig. 22). On some seats,
spacers are installed between the seat adjusters
and seat frame or seat adjuster and floor pan.
Note location of spacers for reinstallation in same
position(s).
5. To install, reverse removal procedure.
NOTICE: See NOTICE on page 9H-1 of this
section.
a. If a manual adjuster is being replaced,
install new adjuster control knob as
described under Manual Seat Adjuster
Control Arm Knob.
When installing manual seat adjusters, the
right and left seat adjuster sliding
I

91.1-1 2 SEATS - F STYLE
VIEW A
1. FRONT SEATBACK AND GUSHION
2. TRACK BRACKET AS8EMBLY
8. NUT, TYPE $2
4. ELECTRICAL HARNESS
5. RETAINER (GASKET)
8. SIX-WAY CONTROL SWITCH
7. SWITCH COVER
Fig. 2 1 Seat to Floor Pan and Six-Way Power Seat
Control Switch Installation
mechanism should be in same relative
position when attaching adjuster to seat
bottom frame. Tighten seat adjuster-to-seat
frame attaching bolts
20 to 28 N.m (15 to
21 ft-lb).
b. After installing manual adjusters to seat
frame, check operation of adjusters.
c. When installing power seat adjusters, check
that both adjusters are parallel and in phase
with each other. In the event the adjusters
are out of phase (one adjuster reaches its
maximum horizontal or vertical travel in a
given direction before the other adjuster),
phase adjusters as follows:
Horizonta! travel - operate seat control
switch until one adjuster reaches
full-forward position. Detach horizontal
drive cable from adjuster which has reached
full-forward position. Operate seat forward
until other adjuster reaches full-forward
position; then connect horizontal drive
cable and check horizontal travel of seat.
Front or rear vertical travel - operate
seat control switch until one adjuster has
reached fully raised position at both front
and rear vertical travel limits. Disconnect
both front and rear vertical drive cables
from adjuster which has reached the fully
raised position. Operate seat control switch
until other adjuster reaches the fully raised
position at both front and rear vertical
travel limits; then connect previously
removed front and rear vertical drive cables.
Check vertical travel by operating adjusters
through one or two complete cycles. The
above operation may be repeated on an
as-required basis if adjusters do not appear
to be in phase after test cycle.
SIX-WAY POWER SEAT ADJUSTERS,
THREE-MOTOR DIRECT DRIVE
The following procedures cover replacement of
the major component parts of the seat adjusters.
Horizontal and Vertical Drive Cables (Fig. 24)
Removal and Installation
1.
Remove front seat assembly from body and place
upside down on clean protected surface.
2. Cables may be disconnected by squeezing oblong
connectors at motors,
gearnuts and adjuster
drives.
Cable connector at motor for inboard (passenger
side) or outboard (driver side) rear vertical
gearnut requires initial removal of nut securing
motor support bracket (7) to gain access to
connector at motor.
3. Install cables reverse of removal procedure.
Permanent Magnet Electric Motors (Fig. 24)
Removal and Installation
1. Remove front seat assembly and place upside
down on clean protected surface.
2. Disconnect motor feed wires from motors.
3. Remove nut securing front of motor support
bracket to inboard adjuster and withdraw
assembly from adjuster and
gearnut drives.
4. Disconnect drive cables from motors and
complete removal of support bracket with motor
attached.
5. Grind off peened over
end(s) of grommet
assembly securing motor to support and separate
motor(s) as required from support.
6. To install, reverse removal procedure except as
noted.
7. Drill out top end of grommet assembly using an
8 mm
(3/16") drill.
8. Install grommet assembly to motor support
bracket and secure motor to grommet using
3/16" rivet.

C-
SEATS - F STYLE 9M.13
1. SEAT ADJUSTER ASSEMBLY
2. ATTACHING SCREW
9. THREE MOTOR DIRECT DRIVE
4. WlRE HARNESS GONNECTOR
FROM MOTOR
5. SEAT CUSHION
8. WlRE HARNESS CONNECTOR
TO SEAT SWITCH
7. ADJUSTER TO SEAT SPACER
Fig. 22-Six-Way Power Seat Components
2. COVER - REAR INNER ADJUSTER
3. ADJUSTER - DRIVER
4. COVER - DRIVER'S ADJUSTER 9. NUT
5. ADJUSTER - PASSENGER 8. AUXlLiARY LOCKING WIRE
Fig. 23 Seat to Floor Pan Components and Installation - Manual Seat

9H-14 SEATS - F STYLE
8
1. REAR GEARNUT DRIVE
2. ASSIST SPRINGS
3. HORIZONTAL ADJUSTER MOTOR
4. ADJUSTER ASSEMBLY
6. REAR VERTICAL GEARNUT CABLE
d). FRONT OEARNUT DRIVE 11. FRONT VERTICAL DRIVE CABLE
7. MOTOR SUPPORT BRACKET 12. REAR VERTICAL DRIVE CABLE
8. LOWER CHANNEL STOP (REBUILD KIT) 13. HORIZONTAL DRIVE CABLE
9. FRONT VERTICAL QEARNUT MOTOR 14. HORIZONTAL ADJUSTER DRIVE
10. REAR VERTICAL GEARNUT MOTOR
Fig.
24 - Six-Way Seat Adjuster Assembly - Three-Motor Low Profile Direct Drive
Horizontal Actuator (Fig. 25)
Removal and Installation
seat assembly into body. See step 5c under Front
Seat Adjuster Assembly
- Removal and
Installation.
1- Remove seat assembly and place Front/Rear Vertical Gearnut (Fig, 25) upside down on a clean, protected surface.
2. Disconnect drive cables as described under
Horizontal and Vertical Drive Cables.
3. Remove affected adjuster assembly from seat and
place in bench vise to prevent accidental ejection
of compressed vertical assist spring when rear
gearnut attaching nut is removed.
4. At top of adjuster, remove rear vertical gearnut
attaching nut and tension spring. Open vise
slowly to relieve assist spring compression and
remove. At top of adjuster remove front vertical
gearnut attaching nut.
5. Lift front of adjuster upper channel upward, then
remove screws securing horizontal actuator to
adjuster upper channel assembly and remove
actuator from adjuster.
6. To install, reverse removal procedure. When
installing horizontal actuator, be sure actuator
drive gear is fully engaged with teeth on lower
channel rack gear. With actuator attaching
screws tight, there should be no free motion
between upper and lower adjusting channels.
Adjust actuator as required until all free motion
between channels has been removed (see Power
Six-Way Seat Adjuster Horizontal Actuator
Adjustment under Front Seat Adjustments). Be
sure seat adjusters are in phase before installing
Removal and Installation
1. Operate seat to full-forward position.
2. Remove front seat assembly from body and place
upside down on a clean, protected surface.
3. Disconnect drive cables as described under
heading Horizontal and Vertical Drive Cables
and remove affected adjuster assembly from seat.
4. Follow previous description for top of adjuster
removal of vertical
gearnut attaching nuts,
tension springs and assist spring.
5. Lay adjuster on its side and remove as required
vertical
gearnut attaching screws; the remove
gearnut from adjuster. Depending on which
gearnut is being removed, it may be necessary to
manually crank the horizontal actuator to gain
access to vertical
gearnut attaching screws on
bottom of lower channel.
6. If vertical gearnut is being replaced with a new
part, transfer
gearnut shoulder nut and tension
spring to new
gearnut assembly.
7. To install, reverse removal procedure. Be sure
adjusters are in phase before installing seat
assembly into body. See step
5c under Front Seat
Adjuster Assembly
- Removal and Installation.

SEATS - F STYLE 9H-15
I 1. FRONT VERTICAL GEARNUT I 1 2. HORIZONTAL ADJUSTER
1 3. QEARNUT T'O UPPER CHANNEL NUTS
1 4. ADJUSTER ASSEMBLY I 5. REAR VERTICAL GEARNUT
6. VERTICAL ASSIST SPRING
Fig. 25 - Six-Way Seat Adjuster Components
SIX-WAY POWER SEAT SWITCH ASSEMBLY
Removal and Installation
1. Carefully disengage switch cover plate
(escutcheon)
using a flat-bladed tool and remove
(Fig. 26).
2. Remove
switch assembly cover attaching screws.
3. Remove switch assembly cover.
4. Lift
up on switch assembly and disconnect wire
harness connector assembly.
5. To
remove power seat bracket support assembly,
remove attaching screws that retain the assembly
to the seat cushion frame.
6. To install, reverse removal procedures.
Identification arrow on harness connector face
must point to the rear of vehicle for proper
operation of the six-way power seat assembly.
FOUR-WAY MANUAL SEAT ADJUSTER
The four-way manual seat adjuster cannot be
disassembled for repair except to replace the assist
springs or release lever knob (Fig.
27). The adjuster, in
addition to providing for forward and rearward seat
travel, also allows the seat cushion to be raised or
lowered in the front for additional comfort. To raise
the front of the cushion, pull up on the bar lever in
front of seat and push back on the
seatback until the
desired position is reached. To lower the front of the
seat cushion, again pull up on the bar lever in front of
the seat, but push down on the front of the seat
cushion.
SEATBACK LOCK %%RIMEW/SIDE INNER BAR
STOP
Both the seatback lock striker located on the
outboard side of the seat cushion and
seatback side
outer bar stop located on the outboard side of the seat
cushion consist of a single metal bolt and washer
assembly threaded into a tapped plate located in the
seat cushion frame assembly.
Removal and Installation
1.
Using door and tailgate striker removal tool
J-23457, BT-7107 or equivalent, remove striker
or stop from
seatback side arm.
2. To install striker or stop, start thread engagement
by hand to assure that bolt is threaded straight,
then tighten striker or stop 46
N.m (34 ft-lb). Use
tool J-23457, BT-7107 or equivalent.
HIGH PERFORMANCE ARTICULATING AQ9
SEAT (2FS87)
Head Restraint
Remove or Disconnect
1.
Fully extend headrest and work boot (12, Fig. 28)
and escutcheon
(9) downward from underside of
head restraint. Separate escutcheon from boot.
2. Insert lock release tool (Fig. 14) down front
surface of head restraint post until it stops. Push
both the head restraint and tool fully downward
at the same time;
then leaving the tool in place,
lift out the head restraint from the seatback.
Disassemble
1. Rotate head restraint knob to fully extend
pad
(2, Fig. 28).
2. Pry
off RH and LH knob covers
(5).
3. RH and LH knobs (6).
4. Pry
head restraint pad (2) from inner cover
(3).
5. Further disassembly will be obvious upon
inspection.
+'+ Assemble [I]
Reassemble reverse of disassembly procedure.
Install or Connect
1. Reassemble escutcheon to boot and insert head
restraint post through escutcheon and into post
guide (10) in
seatback frame.
2. Push head restraint to full-down position and
check that lock spring engages and prevents head
restraint from being removed.
Lateral and Lumbar Bladders
Remove or Disconnect
1. Disconnect hose coupling (6, Fig. 29) and
electrical connectors (3 and 5). Remove seat and
place on clean protected surface.

FRONT SEAT
SEAT SWITCH
LINER MECHANISM
TRlM ESCUTCHEON
ATTACHING
ATTACHING BRACKET
BRACKET BOLT
UPPER RECLINER
LOWER RECLINER
MECHANISM MECHANISM TRIM
AND SEAT SWITCH TRIM b ESCUTCHEON
Fig. 26 - Six-way Power Seat Switch

SEATS - F STYLE 9H-17
865
1. HEAD RESTRAINT COVER
2. HEAD RESTRAINT PAD
3. INNER COVER
4. ACTUATOR ASSEMBLY
5. KNOB COVER
6. KNOB
7. OUTER COVER
8. BELT GUIDE
9. ESCUTCHEON
10. HEAD RESTRAINT POST GUIDE
1 1. SPRING NUT
13. SEATBACK OUTER PANEL
14. MAP POCKET NET
15. SEATBACK INNER PANEL
16. SEATBACK FRAME
18. LATERAL SUPPORT
19. LATERAL SUPPORT BLADDERS 26. SEATBACK TRIM COVER
AND HOSE ASSEMBLY
27. SEATBACK PAD
20. LUMBAR SUPPORT HINGE 28. TRIM PANEL
21. LUMBAR BLADDER AND HOSE 29. FINISH PANEL
ASSEMBLY
30. SWITCH ASSEMBLY
2. LUMBAR PANEL 31. RECLINER HANDLE 35. WASHER
3. ADJUSTER ASSEMBLY 32. INERTIA LEVER KNOB 36. SPRING NUT
4. CUSHION TRIM COVER 33. INNER HINGE PIVOT BOLT 37. CUSHION FRAME
6. CUSHION PAD 34. BUSHING 38. RECLINER ASSEMBLY
Fig. 28 - High Performance Articulating Seat (A09)