1988 PONTIAC FIERO Service Repair Manual

9A-8 RADIO SYSTEMS AND ANTENNAS
Fig. 805 Steering Wheel Controls
band (AM or FM), stereo, scan, volume and
speaker balance. Lighting dims with other
instrument lighting to prevent glare at night.
To Operate Radio:
Turn Radio On (at Receiver)
- press power
PWR button; press again to turn radio off.
NOTE: Ignition must be in the "Accessory" or
ON position. If radio does not come on, press
MUTE button on steering wheel. (See anti-theft
feature).
Adjust Volume (at Receiver or Steering
Wheel)
- press VOL arrow pointing up to
increase volume; press VOL arrow pointing down
to decrease volume.
(at Receiver Only) - pressing VOL arrow
pointing up and VOL arrow pointing down
simultaneously will return volume to a factory
preset level.
NOTE: When the radio is turned off, the last
volume setting is stored in memory. When turned
back on, it will slowly return to that level.
Select AM or FM (at Receiver or Steering
Wheel):
Press AM FM to select desired band.
Select Stations (at Receiver or Steering
Wheel):
Seek
Press SEEK button to automatically search for
the next station.
Scan
Press SCAN button to sample each station for a
few seconds; press again to stop scan.
Tune Manually
Press and hold TUNE button with arrow
pointing up or down.
Favorite Stations
The PRESET button on the steering wheel
control (if available can be used to cycle through
a list of favorite stations, but they must first be set
up at the receiver.
e Setting Favorite Stations (at Receiver):
Locate a favorite station by using the seek, scan,
or up-down tuning buttons. Then press the SET
button, and within five seconds, press one of the
five station buttons.
The radio will now return to that station
whenever the station button is depressed.
NBTE: A total of 10 stations can be preset (five
AM and five
PM).
Setting Time of Day:
To Set Hours,
press SET button; within five
seconds press and hold SEEK button until
correct hour appears.
TO Set M inlotes, press SET button; within five
seconds press and hold SCAN button until
correct minute appears.
To Display Time with ignition Off (on
Receiver):
Press recall button (RCL).
To Display Frequency (Receiver or
Steering
Wheel):
When the radio is on and time is being displayed,
press recall button (RCL) to display frequency.
To Receive Stereo:
The radio will automatically switch to stereo
when tuned to an
AMQr FM Station
broadcasting in stereo.
If AM stereo is not desired, press the AM-ST
button; press again to return to stereo. (Note:
Nonstereo may be desired in areas of high noise
level.
Loudness Control (on Receiver):
Press LD button to boost bass; press again to
release.
Graphic Equalizer (on Receiver):
NOTE:
60 and 250 control bass; lk controls
midrange,
3.5k and 10k control treble.
Generally, the
lk control is placed in the center
(detent) position, while the bass and treble
controls are adjusted upward to varying degrees.
Since the
10k control has the most influence on
treble, it may produce high frequency hiss when
fully up. If this occurs, move it down until the
hiss disappears.
Speaker Balance (on Receiver):
To increase volume in the right speakers, press
the BAL button with arrow pointing right; to
increase volume in the left speakers, press BAL
button with arrow pointing left.
NBTE: Pressing both buttons at the same time
puts balance in the center (see graphic display on
receiver).
Speaker Front-Wear Volume (on Receiver
or Steering Wheel):
To increase front speaker volume, press FADE
button with arrow pointing up to increase rear
speaker volume, press FADE button with arrow
pointing down.
NOTE: On receiver only, pressing both buttons
at the same time put equal volume in front and
rear speakers (see graphic display on receiver).
To Deaden Sound (on Steering Wheel
Only):
Press MUTE to stop all sound; press again to
bring sound back. MUTE button is also used to
reactivate radio if battery or radio is removed and
reinstalled. (See anti-theft feature).
Anti-Theft Feature:

RADIO SYSTEMS AND ANTENNAS 9A.9
This radio cannot be used on cars without
steering wheel controls. When removed from the
car and reinstalled, the radio will be dead and
LOC will appear on the graphic display. Press
MUTE on the steering wheel to reactivate the
radio.
To Operate the Tape Player:
(NOTE: The following controls are located on
the receiver.)
inserting f ape
Insert cassette into door marked AUTO
REVERSE, so exposed edge of tape enters first.
This turns tape player on and disables the radio.
Tape Bias
When the "CrO" button is lighted, it is set for
chrome or metal tapes; press and the light will go
out (for normal bias tapes).
Reversing Sides
Press program button PROG to play other side
of tape. When end of tape is reached, it
automatically reverses direction and plays the
other side.
NOTE: When lighted arrow located below tape
door points "up," selections listed on the top side of
the tape are being played; when arrow points
"down,"the bottom side is being heard.
Fast Forward
Press FWD button to activate; press PROG to
return to playing speed.
Fast Reverse
Press REV button to activate; press PROG to
return to playing speed.
Music Search
Press SEEK to automatically find the next
selection. Press REPT to repeat the selection
being played.
To Eject Tape
Press EJECT.
NOTE: Power button must be "on." Tape ejects
and radio becomes operative. (It is not nesessary
to eject tapes when leaving car, since internal
pressure is automatically released when ignition
is turned "off.")
For best results,
120 minute tapes are not
recommended.
"Receives
C-QUAMO AM stereo broadcasts.
Most AM stereo stations across the country broadcast
in
C-QUAMO, but some do not. Check with your
local station for compatibility in your area.
C-QUAMO is a Registered Trademark of
Motorola, Inc.
ON-GAR SERVICE
RADIO RECEIVER
Figures 606 and 607
Remove or Disconnect
1. Negative battery cable.
2. Radio/AC-Heater console trimplate.
3. Four (4) radio retaining screws.
4. Pull radio straight out.
5. Power, speaker and antenna connectors. Remove
radio.
6. Transfer attaching parts (clips, brackets, etc.) to
new radio if unit is to be replaced.
Install or Connect
To replace, reverse removal procedure.
RADIO STEERING WHEEL CONTROLS
Refer to Section 3B4 for removal procedure.
AUDIO AMPLIFIER
Figure 610
Remove or Disconnect
5. Two (2) harness connectors.
6. Three (3) attaching screws and remove bracket
from amplifier.
Install or Connect
Reverse removal procedure to reinstall.
RADIO SUPPRESSION EQUIPMENT
When installing a new radio, or when noise is a
problem, insure that radio suppression equipment is
present and properly installed.
FRONnSPEAKER
Figure 606
Remove or Disconnect
1. Instrument panel pad (see Section 8C).
2. Four (4) screws holding speaker in instrument
panel carrier.
3. Lift speaker out of instrument panel. Disconnect
wiring.
Install or Connect
1. Negative battery cable. Reverse removal procedure to install.
2. Right side
instrument close out panel.
3. Two (2) amplifier bracket to instrument panel REAR SPEAKER; SUB-WOOFER SPEAKER
screws.
Rear speakers are mounted in the rear quarter
4. Lower audio amplifier and bracket out of trim panel. See Section
2N in the body portion of this
instrument panel. manual for complete details
of replacement.

9A-10 RADIO SYSTEMS AND ANTENNAS
ANTENNA
Figure 609
Diagnosis is covered in the general description at
the front of this section.
Remove or Disconnect
1. Negative battery cable.
2. Right side lower instrument close out panel.
3. Antenna connection at radio.
4. Power antenna: Disconnect instrument panel
harness from radio and, using tool
J 28742 or
equivalent, remove power antenna wire from connector. Remove right
lower instrument close
out panel and disconnect power antenna relay.
5. Raise car and remove fender wheelhouse panel ,
(see Section 2C).
6. Mast escution.
7. Mast or motor assembly bracket screws.
8. Grommet from kick-panel bulkhead and
carefully pull harness from car interior.
9. Lower antenna assembly from fender well.
Install or Connect
Reverse removal procedure to install.
Fig. 606 Radio and Speaker Installation

RADIO SYSTEMS AND ANTENNAS 9A.11
1 --RADIO ASM. 3- BRACKET 5- BOLTISCREW (3) 7-BUMPER
2 - BRACKET 4- BOLTISCREW (4) 6-NUT 8- IIP LOWER TRIM
PAD
Fig.
607 Radio Installation
ANTENNA LEAD
(SEE RADIO RECEIVER WIRING)
REAR DEFOG RELAY
INSTRUMENT PANEL
Fig.
608 Power Antenna and Rear Defog. Relay

9A-12 RADIO SYSTEMS AND ANENNAS
FIXED ANTENNA
POWER ANTENNA DETAIL OF
HOLE IN FENDER
Fig. 609 Antenna Mounting

RADIO SYSTEMS AND ANTENNAS 9A.13
1-AMPLIFIER ASSEMBLY
2-I.P. PAD AND RETAINER
3-BRACKET
4-I.P. HARNESS 5-HARNESS ASSEMBLY
6-BOLTISCREW AND CUP
7-TO SWITCH ASSEMBLY
8-TO FISHER HARNESS
9-FISHER CONNECTOR
- REAR SPEAKER (BLUE)
10-RADIO CONNECTOR
- I.P. HARNESS (BLACK AND
NATURAL)
Fig.
6 10 Audio Amplifier

9A-14 RADIO SYSTEMS AND ANTENNAS
DIGITAL CLOCK POWER ANTENNA WIRE
PWR. LEAD (BLK) FISHER REAR SPEAKER
FRONT SPEAKER LEAD (BLUE)
LEAD
(NAT) ANTENNA LEAD

CRUISE CONTROL 9B-1
SECTION 9B
SE CONTROL
CONTENTS
General Description ................................... 9B-1
Off/On/Resume/Accel Switch
Operation
................................................ 9B- 1
Set/Coast Button Switch .............................. 9B- 1
Electronic Controller (Module) .................... 9B-2
Servo Unit ..................................................... 9B-2
Speed Sensors ............................................. 9B-3
VSS Buffer Amplifier ................................ 9B-3
PM Generator Speed Signal ..................... 9B-3
Vacuum Supply ............................................. 9B -4
Electrical and Vacuum Release
Switches
..................................................... 9B-4
Electrical Harness ...................................... 9B-4
Diagnosis .................................................. 9B-4
Cruise System Surges .................................... 9B-4
Cruise Set Speed High or Low ..................... 9B-4
Excessive Cruise Speed Loss on Hills .......... 9B-4
Cruise Tap-Up and Tap-Down .................... 9B-4
On-Gar Service (Illustrated) ..................... 9B-6
Cruise Release Switches ............................... 9B-6
............................. Cruise Processor Module 9B-6
Vacuum Harness and Cable Routing -
VIN E ..................................................... 9B-7
Vacuum Harness and Cable Routing -
VIN S ......................................................... 9B-8
Vacuum Harness and Cable Routing -
VIN F,8 ..................................................... 9B-9
Servo Mounting - VIN S,F .......................... 9B-10
....................... Servo and Bracket - VIN E 9B-10
Vacuum Tank - VIN S,F,E ....................... 9B-10
GENERAL DESCRIPTION
Cruise control is a speed control system which
maintains a desired car speed under normal driving
conditions. However, steep grades up or down may
cause variations in the selected speeds. The electronic
cruise control system has the capability to cruise, coast,
resume speed, accelerate, and "tap-up" and
" tap-down" .
The main parts of the cruise control system are
the mode control switches, controller (module), servo
unit, speed sensor, vacuum supply, electrical and
vacuum release switches, and electrical harness.
The cruise control system uses vacuum to operate
a throttle servo unit. The servo unit maintains a desired
car speed by trapping vacuum in the servo unit at the
proper servo position. The controller monitors vehicle
speed and servo position and operates the vacuum and
vent valves in the servo to maintain desired speed. The
controller contains a low speed limit which will prevent
system engagement below a minimum speed of about
25 mph. The operation of the controller is controlled
by mode control switches located in the end of the
directional signal lever. To disengage the system, two
release switches are provided. An electrical release
switch mounted on the brake pedal bracket (brake and
clutch pedal bracket on cars equipped with manual
transmission) disengages the system electrically when
the brake pedal (or clutch pedal) is depressed. A
vacuum release valve, mounted on the brake pedal
bracket, vents the trapped vacuum in the servo to
atmosphere when the brake pedal is depressed,
allowing the servo unit to quickly return the throttle
to idle position.
.
OFF/ON/RESUME/ACCEL SWITCH
(OPERATION)
Figure 1
The Off/On/Resume/Accel Switch has three
positions. This switch turns the cruise control system
ON and OFF and also returns cruise control operation
to the last speed setting when MOMENTARILY
moved towards the R/A position after braking. (Do
not hold the slider in the R/A position
... release it
immediately.) If the slider is held in the R/A position
for more than one second, the system goes into the
Accel mode. To accelerate the car, move the slider
switch to the R/A position and hold it there until the
car reaches the desired speed. When the slider switch
is released, the system will maintain the new cruise
speed. In order to use the Accel mode, the cruise
OFF/ON/Resume/Accel switch must be in the "ON"
position and the car must be above the low speed limit
of
25 mph.
The slide switch can also be used to "tap-up" car
speed. In order to do this the cruise must be engaged
and operating. "Tapping-up" is done by quickly
pressing the slide switch toward the R/A position and
quickly releasing it, or "tapping" the lever. Do not hold
the lever in the R/A position or the system will go into
the Accel mode. "Tap-up" is a function in which cruise
speed can be increased by
1 mph increments (one tap
= 1 mph increase).
SET/COAST BUTTON SWITCH
Figure 1
The cruise control Set/Coast Switch (located in
the end of the turn signal lever) has two positions
-
"Normal" and "Depressed".