Saab 9000 1995 User manual

Saab 9000
Service Manual
M 1995
@
3:2 Electrical System,wiring diagrams
(Final Edition)

General information
Power supply systems
Engine systems
Saab 9000 Lighting systems
Visibility systems
Instrumentation
SERVICE -Warning systems
MANUAL Comfort systems
3:2 Electrical System,
Safety systems
wiring diagrams
List of components
(Final edition)
Crimped connection locations
M 1995
Connector locations
Foreword
This Service Manual supersedes:
• Electrical System, wiring diagrams
M1995
• Electrical System, wiring diagrams
(Supplement) M1995
• SI 010-1589 page 9-22
All information and illustrations in this ser-
vice manual are based on the design of
the cars that was current when the book
went for final editing. Model range, tech-
nical data and equipment varies from
market to market and may be changed
without prior notice.
Saab Automobile AB
RECYCABLE PAPER

Warning, Important and Note
The headings "Warning", "Important" and "Note"
occur from time to time in the Service Manual. They
are used to draw the attention of the reader to in-
formation of special interest and seriousness. The
importance of the information is indicated by the
three different headings and the difference between
them is explained below.
,& WARNING
Warns ofthe risk of material damage and grave
injury to mechanics and the driver, as well as
serious damage to the car.
Important
Points out the risk of minor damage to the car and
also warns the mechanic of difficulties and time-
wasting mistakes.
Note
Hints and tips on how the work can be done in a
way that saves time and labour. This information is
not supplied for reasons of safety.
Marketco'des
The codes refer to market specifications
AT
AU
BE
CA
CH
DE
DK
ES
EU
FE
Fl
FR
Austria
Australia
Belgium
Canada
Switzerland
Germany
Denmark
Spain
Europe
Far East
Finland
France
©Saab Automobile AB 1995
Production: Service
Support, Saab Automobile AB, Trollhlittan, Sweden
GB
GR
IS
IT
JP
ME
NL
NO
SE
us
UC
Great Britain
Greece
Iceland
Italy
Japan
Middle East
Netherlands
Norway
Sweden
USA
US California

Contents
General information
General information . . . . . . . . . . 3
Using the Manual . . . . . . . . . . . 4
Fault diagnosis with the aid of wiring
diagrams . . . . . . . . . . . . . . . 6
System groups
and their wiring diagrams . . . . . . . 8
Diagnostics and data link connectors . 1
O
Cables and leads . . . . . . . . . . . 11
Symbols used in the wiring diagrams . 12
Abbreviations . . . . . . . . . 13
Some simple testing methods . 14
PWM signals. . . . . . . 20
Fuses and relays . . . . 25
Grounding points. . . . . 31
Control module locations 41
Power supply systems (P)
Power supply (+30 circuit). 42
Power supply (+
15 circuit) . 44
Power supply (+54 circuit). 46
Power supply (+X circuit) 48
Engine systems (E)
Starting and charging systems. 50
Cooling system with/without 2-speed
radiator fan. . . . . . . . . . . 54
Traction Control System (TCS)
for manual gearbox . . . . . . . . . 60
Saab TRIONIC engine management
system. . . . . . . . . . . . . . . . 66
Saab TRIONIC ETS engine management
system . . . . . . . . . . . . . . . . . . . 76
Pump and valve for secondary air injection . 80
MOTRONIC 2.8.1 sequential multiport
fuel injection system . . . . . . . . 84
Coolant pump for VG. . . . . . . . 94
Traction Control System (TCS) VG 98
Lighting systems (L)
Headlamps . . . . . . . . 104
Daylight driving lights. . . 110
Parking lights with/without
side marker lights. 118
Extra fog lights . 124
Brake lights. . . . 130
Reversing lights 142
Rear fog light . . . 148
Direction indicators, hazard flashers . 154
Courtesy lights, interior lighting and
luggage compartment lighting . . . . 158
Other interior lighting . . . . . . . . . 170
Lighting for instruments and controls . 180
Pre-installed trailer wiring. . . . . . . 184
Visibility systems (V)
Windscreen wipers . . . . . .
Headlamp wipers . . . . . . .
Headlamp beam adjustment .
Rear window wiper . . . . . .
188
192
196
200
Instrument systems (I)
Indicator and warning lamps I. .
Electronic speedometer
with/without buzzer . . . . . .
EDU trip computer and clock.
sectrip computer . . . . . .
Warning systems (W)
Indicator aod warning lamps II..
Pictogram - Filament monitor,
oil pressure warning lamp . . .
Pictogram - Door indication. . .
Seatbelt warning with/without buzzer
and ignition key warning .
Horn ...... . .
EXH warning . . . .
Comfort systems (C)
Air conditioning, NC . . . . . . .
Automatic Climate Control, ACC .
Ventilation fan . . . . . . . . . .
Electrically heated front seats . .
Electrically heated rear window and
electrically heated door mirrors . .
Electrically adjustable front seats.
Electrically adjustable front seats
with memory . . . . . . . . .
Electric window lifts. . . . . . . .
Electrically operated sunroof . . .
Electrically operated and heated
door mirrors . . . . . . . . . . .
Central locking system . . . . . .
Electrically operated tailgate release .
Cruise Control system . . .
Radio installation pre-wiring . . . . .
Premium audio system . . . . . . . .
Prestige audio system . . . . . . . .
Mobile telephone installation pre-wiring
Cigarette lighter........ .
Safety systems (5)
ABS anti-lock brakes (Mark IV).
TC/ABS (manual, Mark II)
Airbag .· .... . . . . .
Anti-theft alarm . . . . . .
SHIFT LOCK P-interlock .
List of components . . . .
Crimped connection locations
Connector locaJjons . . . . . .
Saab 9000
1
. 204
216
222
228
232
238
246
250
256
260
264
270
276
280
284
288
292
298
304
310
316
320
324
330
334
340
r
344
348
352
358
366
. 370
. 378
. 383
• 391
. 395

2
Saab
9000

Generalinformation
General information
Introduction
This service manual deals with the electrical system
of model year 1995 SAAB 9000 cars. Itsupplements
Service Manual
3:1
"Electrical system, instru-
ments" and also contains summarized descriptions
of the operation of all other electrical and/or elec-
tronic systems.
The purpose of this manual is to facilitate service
work and fault diagnosis on the car's electrical sys-
tem. Each electrical subsystem, such as the ignition
system, hazard flashers etc., is therefore described
individually with wiring diagrams, a description of
operation, fault diagnosis hints and tips, component
locations and illustrations of the components.
Safety instructions
_&
CAUTION
ARCING MAY CAUSE BURN INJURIES
Although system voltage is only
12
V, burn
injuries may be caused by flash-over or fire in
the car, since the energy content of the battery
is very high. A short-circuit could give rise to
extremely high currents.
_&
CAUTION - HIGH VOLTAGE
The electronic ignition system generates volt-
ages iri excess of 48,000 V.
Such voltages can be lethal for people with a
weak heart and those who have a pacemaker.
So treat the ignition system with the respect it
deserves.
Before starting work on the electrical system:
• take off your wrist-watch and any rings you may
be wearing
• disconnect one of the battery terminals if any elec-
trical components are to be removed
• always follow the instructions and recommenda-
tions in the relevant service manuals.
Saab 9000
3 I

4 General information
Using the Manual
Two double-page spreads for a subsystem wiring
diagram, in this case "Rear fog light", are shown be-
low as an example of how to use this manual.
Uppslag 1
r··- ... :• ~• .,
I u,. I
U..=="-"-'-4--\-----'!u ! ,
: 500 j
:_._____,
Q33p
Componentnumber
Every component has an identification number,
which is next to the symbol for each component in
the wiring diagram.
The same-number is also used in the special sys-
tem books.
The component number is also to be found:
• In the description of component locations.
• on the place in the car where that component is
located.
• on the exterior illustration of the system in ques-
tion.
Tempu revel
lmseppretu1empurevolbileg rokamrevoc:
tephe rosll'e etepe tenov sindu turqu bl'evt
emu repar tiuve tamia queso utage udulc
vires hulTlJs tallo 25deu Anetn bisre lreun
carmiavireingenumquemihermunerveris
adest duner veris
AdestilervQUeviescilbiAoispul tatqu aliqu
diams bipos itapu SOsta lsant oscul bifid
mquec rurnen berra etmii pyren nsomn
anoct reernoncitquqar anoteventmhipec
oramo uerfu orets nitus sacer tusag teliu
ipsev 75tvi Eo~ el31Jrplica oscn eseli
sipse ent1u ammih
Tarac ecame
Uacae ierqu vagaisubesc rpore ibere pefQU
umbra perqu an1raerorpnetra 1OOatmthif
napat ntint riora inlut urque nirnis otoqu
cagat rolymoedu iuntoulosa laracecame
suidt mande onatd stent spin usore idpar
thaec abies 125sa lmsep pretu tempu revel
bileg rokamrevoclepl,e rosveetepe1enov
sindu turqu t>revt
Umquemiher muner 123
Ventm hipec oramo
EMiurepar huve tamcaqoeso utage udutc
vires humus lal«> 1SOeuAnetn bisre treun
carmi avire ingen ufflQUe.
1 Miner m.me.-vefis adesl duner veris
adeS1 iteru quevi escitbilo isput
2 Tatqu aliqu diams bipos ilopu 17Sta
lsant oscul bilid mquec cumen
3 Berra et1niipyren nsonv, anod reem
oncil quqar anofe venl:mhipec.
• OranlOuetfu orcts nitus sacer tusag
1eliuipsev 200viEonei elaur plica.
Oscri:
Eseti sipse enitu anvnil1 mensl quidi aptat
rinaruacae terquvagas ubesc rpore ibere
perquumbraperquantraerorp netra 22Sat
mihil napat ntint.
,.._
M
0
Saab 9000

Spread 2
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Saab 9000
General information 5 I
Umque m1hermuner. 125

6 Generalinformation
Fault diagnosis with the aid
of wiring diagrams
Introduction
The wiring diagrams differ significantly from the lay-
out previously used in Saab 9000 service manuals.
The layout is the same as in "3:2 Electrical system,
wiring diagrams M1994" for Saab 900 cars.
In the following pages we will explain in greater de-
tail how the wiring diagrams are drawn up and how
to read them.
System groups
The wiring diagrams belong to various system
groups on the following pattern:
• P Power Supply Systems
• E Engine Systems
• L Lighting Systems
• V Visibility Systems
• I Instrumentation Systems
• W Warning Systems
• C Comfort Systems
• S Safety Systems
Within the system groups the wiring diagrams are
then denominated with a letter (for the system
group) and a number.
The first wiring diagram in the "Engine systems"
group is "E1 Starting and charging systems" and the
last is "E? TCS".
A complete list of.all system groups and their sys-
tems is found in the next heading.
Saab 9000

General information 7 I
Saab9000

8 Generalinformation
System groups and their wiring diagrams
P Power supply systems
P1 Voltage (+30 circuit)
P2 Voltage (+15 circuit)
P3 Voltage (+54 circuit)
P4 Voltage (+X circuit)
E Engine systems
E1 Starting and charging systems
E2 Cooling system
E3 Cooling system with 2-speed
radiator fan
E4 Electronic Throttle System
(ETS)
ESA Saab Trionic engine
management system
ESC Saab Trionic ETS engine
management system
ESE Pump and valve for secondary
air injection
EGA Motronic 2.8.1 sequential
multiport fuel injection system
E6C Circulation pump for coolant VG
E7 Traction Control System (TCS)
VG
L Lighting systems
L1 Headlamps
L2 Daylight driving lights US, CA
L2A Daylight driving lights, other
markets
L3 Parking lights with/without side
marker lights
L4 Extra fog lights US, CA
L4A Extra fog lights, other markets
LS Brake lights without reset
memory
LSA Brakes lights with reset
memory
LSB Brake lights and high-level
brake light
LSC Brake lights and high-level
brake light with reset memory
LG Reversing lights CD
L6A Reversing lights CS
L7 Rear fog light CD
L7A Rear fog light CS
LS Direction indicators, hazard
flashers
L9 Courtesy lights
L10 Interior lighting
L11 Luggage compartment lighting
L12 Glove box light
L13 Reading lamps and illuminated
vanity mirrors
page
42
44
46
48
page
50
54
55
60
66
76
80
84
94
98
page
104
110
114
118
124
125
130
131
136
135
142
143
148
149
154
158
162
166
170
174
L14 Lighting for instruments and
controls
L15 Pre-installed trailer wiring
V Visibility systems
V1 Windscreen wipers
V2 Headlamp wipers
V3 Headlamp beam adjustment
V4 Rear window wiper CS
I Instrumentation systems
11 Tachometer (rev counter)
12 Coolant temperature gauge
13 Fuel gauge
14 Electronic speedometer
14A Electronic speedometer with
speed warning buzzer
15 EDU trip computer and clock
16 sec trip computer
W Warning systems
W1 Indicator and warning lamps II
W2 Pictogram - Filament monitor
W2A
W3
W4
W4B
ws
W6
and oil pressure warning lamp
Pictogram - Filament monitor
(with memory) and oil pressure
warning lamp
Pictogram - Door indication
Seat-belt warning
Seat-belt warning with buzzer
and ignition key warning
Horn
EXH warning
Saab 9000
180
184
page
188
192
196
200
page
204
208
212
216
217
222
228
page
232
238
239
246
250
251
256
260
----

General information 9
System groups and their wiring diagrams {contd.) I
C Comfort systems page
C1 Air conditioning, A/C, ACC 264
C2 Automatic Climate Control,
ACC 270 I
C3 Ventilation fan 276
C4 Electrically heated front seats 280
C5 Electrically heated_rear window
and door mirrors 284
C6 Electrically adjustable front
seats 288
C6A Electrically adjustable front
seats with memory 292
C7 Electric windowlifts LHD 298
C7A Electric windowlifts RHD 299
ca Electrically operated sunroof 304
C9 Electrically operated and
heated door mirrors LHD 310
C9A Electrically operated and
heated door mirrors RHD 311
C10 Central locking system 316
C11 Electrically operated tailgate
release 320
C12 Cruise Control system 324
C13 Radio installation pre-wiring 330
C13A Premium audio system EU 334
C13B Premium audio system US/CA 335
C14 Prestige audio aystem· US/CA 340
C15 Mobile telephone installation
pre-wiring 344
C16 Cigarette lighter 348
S Safety systems page
S1 Anti-lock braking system ABS 352
S2 Anti-lock braking system TCS 358
S3 Airbag 366
S6 Anti-theft alarm US, CA 370
S6A Anti-theft alarm, other markets 371
S7 SHIFT LOCK P-interlock US,
CA 378
Saab9000

10 General information
Diagnostics and data link
connectors
To facilitate the testing of the car's different elec-
tronic systems, there are a number of special scan
tool diagnostics and data link connectors built-in.
These connectors have the following part numbers:
Number
348
444
For system
Data link connector under right-
hand seat
Saab Trionic data link connector.
Small round black connector be-
side the Trionic control module (for
production only)
•....-------
Saab 9000
\ ~
348 ~
H10-9 ~
(.)

Cables and leads
The cables are marked with a cable code consisting
of three parts:
1102 RD 4.0
where:
1102
=
Item number
RD
=
Colour code
4.0
=
Cross-section area in mm2
Item number.
All cables have an individual number,
which is sometimes followed by a letter or a dash
and a number.
Cables with the same number, such as 110, 110-1
,
110-2 etc.,generally belong to the same subsystem.
Colour code.
The following colour codes are used
in the manual's wiring diagrams. The colour codes
may also be used in various combinations, such as
BU/RD, GY/WH, etc.
CODE COLOUR
BK Black
BN Brown
BU Blue
GN Green
GY Grey
OG ·Orange
PK Pink
RD Red
VT Violet
WH White
YE Yellow
Cross-section area.
This is the cross-section area
in mm
2
and is directly related to the current capacity
,of the cable.
Saab 9000
,..
Generalinformation 11 I

12 General information
Symbols used in the wiring diagrams
Fuses
In the wiring diagrams, every subsystem is gener-
ally shown from the relevant fuse in the main fuse
box up to the relevant component or components
and on to the grounding point or direct chassis con-
nection.
The power supply to each fuse is shown separately
inthe power supply system (positive supply) section
which also covers the car's main fuse box, ignition
switch, etc.
Example:
When current is supplied from the +30 terminal, the
path ittakes from the battery to the relevant fuse can
be seen in the section entitled "power supply (+30
circuit)".
Grounding points
Most of the car's grounding points have a compo-
nent number consisting of a letter and a number,
e.g. G2 or G29. The locations of the grounding ·
points on the car are given in the section of the
manual entitled "Grounding points".
Switches, relays and components
Unless otherwise indicated, switches and relays are
represented in their unactuated and unenergized
state.
When the box around the component is drawn with
a solid line, the whole component is shown.
When the box around the component is drawn with
a broken line, only part of the component is shown.
Crimped connections
To reduce the number of connectors, the car's wir-
ing contains several crimped connections. The sym-
bol for these connections in the wiring·diagrams is
shown in the adjacent diagram.
Saab 9000
IES-10 GN f.. 0
+15 +30
'
--+-17 .....l22A ~ ... :~· ..• -.-."-"'22A
P15-5 00 6 O CN ,.o
YEJ'OY 2 5
323 H4-7 H2-9
r--,
-r I
+ 120s GS
-I, I
..__ J

Abbreviations
A number of abbreviations are used in the service
manuals. What they stand for is explained in the fol-
lowing table:
Abbrevia- Significance
tion.
ABS Anti-lock Brake System
A/C Air Conditioning
ACC Automatic Climate Control
APC Automatic Performance Control
(turbocharger boost pressure con-
trol system)
ATA Anti-theft alarm
AUT Automatic transmission
C1 Environmental Class 1
DI Direct Ignition (Electronic ignition)
system
ETS Electronic Throttle System
ISAT Intelligent Saab Tester (Scan Tool)
LHD Left-Hand Drive
MAN Manual gearbox
NTC Negative Temperature Coefficient
·(the resistance decreases with ris-
ing temperature)
PTC Positive Temperature Coefficient
(the resistance increases with ris-
ing temperature)
RHO Right-Hand Drive
SOP Start of Production
SRS SRS (Supplementary Restraint
System)
TCS Traction Control System
TTS Twin Throttle System
Saab9000
General information 13 I

14 General information
Some simple testing methods
General
Suitable instruments for diagnosing faults in the
car's electrical system are an ISAT Scan Tool, a
voltmeter and an ohmmeter.
• Use an ISAT Scan Tool or voltmeter for measur-
ing the voltage in a circuit.
Ifthe voltmeter is of analogue type, it should have
an internal resistance of at least 20 MegohmN.
• Use an ISAT Scan Tool or ohmmeter for measur-
ing the resistance of a circuit.
The ohmmeter must notbe used for carrying out
measurements on components containing semi-
conductors such as control modules arid time-
delay relays, etc.
• When measuring resistance, the voltage supply to
the system being tested must be disconnected
as the test instrumentsupplies a small measuring
current to the circuit,b~ing checked.
This will ensure t~at no current is already flowing
through the circuit and that a correct reading will
be obtained.
Saab 9000
- ·,
_I: ._

Some simple testing methods (contd.)
+
Checking the voltage
1 Disconnect the load.
2 Connect the voltmeter's negative lead to a good
grounding point.
3 Connect the voltmeter's positive lead to the con-
nector pin that is to be checked.
4 If the voltage here should be the same as the
battery voltage, it ought not to differ by more
than about 1 V.
Saab9000
General information 15 I

16 General information
Some simple testing methods (contd.)
+
~
::::12V
Checking for short-circuit to power
supply
1 Disconnect the fuse from the system to be
checked.
2 Connect one of the voltmeter's leads to B+.
3 Connect the other voltmeter lead to the point in
the circuit to be checked.
Take a reading on the load side of the wiring
harness and work outwards to the circuit's
grounding point.
4 Ifthe voltmeter shows a reading, it indicates that
voltage is present at the point concerned.
Saab 9000

Some simple testing methods {contd.)
Checking a voltage drop
This method is used to ascertain whether the volt-
age drop in a wiring harness or across a component,
etc., is too high.
1 Connect the voltmeter's positive lead to that part
of the cable or component closest to the power
supply.
2 Connect the voltmeter's negative lead step by
step towards the load (item of electrical equip-
ment), which should be switched on.
3 When the circuit is activated, i.e. when current
flows through it, the voltmeter will show the dif-
ference in voltage between the two test points.
A circuit in perfect working order should not
show a voltage drop of more than about 1 V.
Insimple circuits or connectors, the voltage drop
ought not to exceed about 0.5 V.
Saab9000
Generalinformation 17 I