Mitsubishi MOTORS Laser 1991 User manual

BACKUP
--- Service Manual
LASER
TALON
1991
Volume-Z
Electrical
FOREWORD
This Service Manual has been prepared with the
latest service information available at the time of
+ ‘.
publication. It is subdivided into various group
categories and each section contains diagnosis,
disassembly, repair, and installation procedures
along with complete specifications and tightening
references. Use of this manual will aid in properly
performing any servicing necessary to maintain or
restore the high levels of performance and reliability
designed into these outstanding vehicles.
This BACKUP DSM manual IS to be used ONLY as a BACKUP. Please DO NOT REDISTRIBUTE
WHOLE SECTIONS. This BACKUP was sold to you under the fact that you do indeed OWN
a GENUINE DSM MANUAL. It CANNOT BE considered a REPLACEMENT (Unless your original
manual was lost or destroyed.)
Please See README.N or README.HTML for additional information
Thank you. G~mm~emymanual@hotma~l.com
GROUP/SECTION INDEX NOOAA--
Electrical
.....................................
El
5
Fusible Liqk and Fuse
Location .............
Inspection Terminal
Location.. ................
Grounding Location
..............................
m
Diode Location
....................................
Junction Block
..........................
.
.........
.
Centralized Junction
.............................
Inspection of Harness
Connector ............
Troubleshooting
...................................
Configuration Diagrams
.........................
Circuit Diagrams
..................................
”
Engine Electrical ...................... r.‘..........
Chassis Electrical ..................................
Chrysler Corporation reserves the right to make changes in design or to
- make additions to or improvements in its products without imposing
any obligations upon itself to install them on its products previously
manufactured.
NOTE: For Engine, Chassis &Body,
refer to Volume-l
“Engine, Chassis & Body”.
0 1990 Mitsubishi Motors Corporation
Printed in U.S.A.

8-2
FUSIBLE LINK AND FUSE LOCATION
FUSIBLE LINK AND FUSE
LOCATION
< Engine compartment >
1
PP
:
< Interior >
Name
Dedicated fuses
Main fusible links
Multi-purpose fuse block
Sub fusible links
. a--r
Symbol
0”; D
A
E
C
NVIE
(1)
l : Air conditioner equipped models.
(2) For details of fusible link and fuse, refer to P.8-8, 9
and 10.
(3) The “Name” column is arranged in alphabetical order.

INSPECTION TERMINAL LOCATION
INSPECTION TERMINAL LOCATION
:’ 1
.A-
Name
Symbol
Name
Symbol
Fuel pump check connector A
Self-diagnosis connector.
E
Ignition timing adjustment connector
B
Terminal for detecting the engine
Oxygen sensor check connector revolution speed
C
c2.OL DOHC Engine>
D
<2.OL DOHC Engine>
NOTE
The “Name” column is arranged in alphabetical order.
3
< Engine
compartment >
I
< Interior >
< 2.OL DOHC Engine >
for detecting the
engine revolution speed
\
16A0662

8-4
GROUNDING LOCATION
GROUNDING LOCATION
c Engine compartment >

GROUNDING LOCATION
&;$’
< Interior-Front section >
/
10A0786
< Interior-Rear section and luggage compartment >
NOTE
(1) *I:
Vehicles with automatic seat belt
(2) **: Vehicles with ABS
‘-.

8-6
GROUNDING LOCATION/DIODE LOCATION
crossmember. front
DIODE LOCATION
< Interior-Front section >
IV\ /
18AO752,
Name Symbol
Diode (for ABS circuit)
D
Diode (for door ajar-warning circuit)
C
Diode (for pop-up circuit)
A
Diode (for theft-alarm circuit)
B
NOTE
The “Name” column is arranged in alphabetical order.

DIODE LOCATION
8-7
< Interior-Rear section >

8-8
JUNCTION BLOCK
JUNCTION BLOCK
NOBBC-
G C-531
J (C-511 K
IC-52)
Theft-alam
horn relay
To engine compartment
wiring-harness
No connection
To instrument
oanel wiring
7
1610805
harness -
-Heater relay
Fuse block
(multi-purpose
fuses)
To body wiring
iarness
H GW
Remarks
(1)
Same alphabets in the diagram indicate the counterparts
of connectors.
(2)
Terminals of the harness side connector are indicated in
parentheses ( 1.

CENTRALIZED JUNCTION
CENTRALIZED JUNCTION
N08BB-
MAIN FUSIBLE LINK (direct connection to battery’s positive 0 terminal)
No.
Circuit
Housing color Rated capacity @I
1
MPI circuit
Blue 20
2
Radiator fan motor circuit
Pink
30 -
3
Ignition switch circuit
Pink
30
4
ABS circuit Yellow
60
<Vehicles without ABS>
<Vehicles with ABS>
SUB FUSIBLE LINK (relay box inside engine compartment)
No. Circuit
Housing color Rated capacity (A)
--
1 Alternator circuit, sub fusible link
0, 0, @, 0, @
Black, Blue *
80, 100”
2 Defogger circuit
Green
40
3
Automatic seatbelt circuit, dedicated fuse @ circuit
Pink 30
4Pop-up circuit, Alternator circuit
Pink
30
5 Power window circuit
Pink
30
6 Multi- 6 urpose fuse 0, @, 0, @I, 0, @, 0, @, dedicated
fuse 4 circuit
Green
40
7 Headlight circuit, dedicated fuse 0, 0, @,circuit
Green
40 (
NOTE
*
: <Vehicles for Canada>
Sub fusible links -
lOA

CENTRALIZED JUNCTION
MULTI-PURPOSE FUSE (inside junction block)
Power supply circuit
No. Rated capacity (A)
Load circuit
Battery
1
10
Automatic seatbelt control unit, key reminder switch, passing
control relay, seatbelt warning buzzer, taillight relay, theft-
alarm starter relay
Ignition
switch
IGs
2
3
-
10
-
Air conditioner control unit, air conditioner switch, defogger
timer, heater relay, power window relay, transistor relay*,
daytime running light relay 2*, ABS relay
Battery
Ignition
switch
ACC 4
5
6
IGs
7
8
ACC 9
10
10
15
15
IO
-
15
IO
Radio
Cigarette lighter, remote controlled mirror
Door lock relay, door lock control unit
4-speed automatic transaxle control unit, auto-cruise control
unit <A/T>, combination meter
-
Intermittent wiper relay, wiper motor, washer motor
Headlight relay, horn, theft-alarm control unit, daytime
running light relay 1 l
IGI
11
10 Auto-cruise control unit, auto-cruise control actuator
automatic seatbelt control unit, combination meter, theft-
alarm control unit, seatbelt timer*
Battery
Ignition
switch
Battery
IGI
12
13
14
15
16
17
18
19
10
-
10
-
30
15
10
10
Turn-signal and hazard flasher unit
-
Theft-alarm horn relay
-
Blower motor
Stop light
Back-up light <M/T>, dome light relay
4-speed automatic transaxle control unit, dome light,
door-ajar warning light, foot light, ignition key illumination
light, luggage compartment light, MPI control unit, radio,
security light, ABS relay
. .---
NWlt
x
: <Vehicles for Canada >
I
Multi-purpose
fuses
16A0805

CENTRALIZED JUNCTION
8-1-I
DEDICATED FUSE
,’ >
Sub fusible link @ 6
15
Blue
Foglight circuit
I
<Engine compartment R.H. side relay box>
16A0897
<Engine compartment L.H. side relay box
(air conditioner equipped models) >
Dedicaied fuse
16AOBSS

8-12
CENTRALIZED JUNCTION
CENTRALIZED RELAY
Classification Name Classification
Name
Engine
compart- A-01X
Taillight relay
Engine
A-l 7X
Condenser fan motor high-
compart-
low changeover relay
ment
ment
R.H. side
A-02X
Headlight relay L.H. side A-l
8X
Condenser fan motor relay
relay box relay box
A-03X
Radiator fan motor relay A-l
9X Magnetic clutch relay
A-04X
Pop-up motor relay Interior
c-34x
Door lock relay
relay box
A-05X
Power window relay Starter relay
<M/T>
c-35x
A-06X
Alternator relay
TJh$;larm starter relay
A-07X Foglight
relay
C-36X Defogger timer
c-37x
Seatbelt timer*
C-38X
Daytime running light relay 1’
c-39x
Daytime running light relay 2’
NOTE
*: <Vehicles for Canada>
<Engine compartment R.H. side relay box>
16A0897
<Engine compartment L.H. side relay box
(air conditioner equipped models) >
< Interior relay box >
c-34x

INSPECTION OF HARNESS CONNECTOR
8-13
INSPECTION OF HARNESS
CONNECTOR
CONTlNUlTY AND VOLTAGE TEST FOR CONNEC-
TOR
Following procedures shall be followed for testing conti&ty and
voltage at connector in order to prevent improper contact and
deterioration of waterproof in connector.
CONVENTlONAL (NON-WATERPROOF) CONN&TOR
Check shall be done by inserting a probing needle from harness
side.
WATER PROOF CONNECTOR
Caution
Do not insert probing needle from harness side as it will de-
terlorates waterproof and cause for rusting. To Inspect. the
energized circuit, use the ECI checker.
flCK FOR IMPROPER ENGAGEMENT OF TERMI-
When terminal stopper of connector is out of order, engagement
of male and female terminals becomes improper even when con-
nector itself is engaged perfectly and terminal sometimes slips out
to rear side of connector. Ascertain, therefore, that each terminal
does not come off connector by pulling each harness wire.
ENGAGING AND DISENGAGING OF CONNECTOR
TERMINAL
Connector which gives loose engagement shall be rectified by
removing female terminal from connector housing and raise its
lance to establish securer engagement. Removal of “cpnnector
housing and raise its lance to establish securer engagement. Re
moval of connector terminal used for ECI and ELC 4 AIT control
circuit shall be done in the following manner.
COMPUTER CONNECTOR
(1) Insert screwdriver Il.4 mm (.06 in.) width] as shown in the
figure, disengage front holder and remove it.

8-14
INSPECTION OF HARNESS CONNECTOR
Housing lance
16R1321
Needle
16R1322
I
Housing lance
16R1323
24
(2) Insert harness of terminal to be rectified deep into connector
from harness side and hold it there.
(3) Insert tip of screwdriver [1.4 mm (06 in.) width] into connector
in a manner as shown in the figure, raise housing lance slightly
with it and pull out harness.
Caution
Tool No. 753787-l supplied by AMP can be used instead of
screwdriver.
(4) Insert needle through a hole provided on terminal and raise
contact point of male terminal.
ROUND WATERPROOF CONNECTOR
(1) Remove waterproof cap by using a screwdriver.
(2) Insert tip of screwdriver [1.4 mm (.06 in.) or 2.0 mm (.08 in.)
width] into connector in a manner as shown in the figure, raise
housing lance slightly with it and pull out harness.
(3) Insert screwdriver through a hole provided on terminal and
raise contact point of male terminal.

INSPECTION OF HARNESS CONNECTOR
8-15
RECTANGULAR WATERPROOF CONNECTOR
(1) Disengage front holder by using a screwdriver and remove it.
Housing lance
16R132d
16R1329
16R1328
Termlnai lance 16Rl330
\
-
(2) Insert tip of screwdriver (“0.8 mm (03 in.) width] into connec-
tor in a manner as shown in the figure, push it lightly to raise
housing lancer and pull out harness.
l lf right size screwdriver is not available, convert a conven-
tional driver to suit the size.
(3) Press contact point of male terminal down by holding a screw-
driver [ 1.4 mm (06 in.) width] in a manner as shown in the
figure.
INJECTOR CONNECTOR
(1) Remove waterproof cap.
(2) Insert tip of screwdriver (1.4 mm (.06 in.) width] into connector
in a manner as shown in the figure, press in terminal lance and
pull out harness.
(3) Press contact point of male terminal down by holding a screw-
driver [1.4 mm (.06 in.) width] in a manner as shown in the
figure.
Caution
Correct lancer to be in proper condition before terminal is
inserted into connector.

8-16
TROUBLESHOOTING
TROUBLESHOOTING
The most important point in troubleshooting is to determine “Probable Causes”. Once the probable causel’&
determined, parts to be checked can be limited to those associated with such probable causes. Therefore, Uhnec-
essary checks can be eliminated. The determination of the probable causes must be based on ‘B th$oqgn! ,b
supported by facts and must not be based on intuition only.
.- I ,
1
i. ,._“‘I. ,,
TROUBLESHOOTING STEPS
If an attempt is made to solve a problem without going through correct steps for troubleshooting, the problem
symptoms could become more complicated, resulting in failure to determine the causes correctly and making
incorrect repairs. The four steps below should be followed in troubleshooting.
1 Observation of Problem Symptoms
I
2 Determination of Probable Causes
0
Checking of Parts Associated with
Troubleshooting is carried out by making step by step checks until
3 Probable Causes and Determination
I
the true cause is found. Always go through the procedures con-
of Faulty Parts
sidering what check is to be made where for the best results.
4 Repair and Confirmation
Observe the symptom carefully. Check if there are also other
problems.
In determining the probable causes, it is necessary to check the
wiring diagram to understand the circuit as a system. Knowledge
of switches, relays and other parts is necessaty for accurate de-
termination. The causes of similar problems in the past must be
taken into account.
After the problems are corrected, be sure to check that the sys-
tem operates correctly. Also check that new problems have not
been caused by the repair.
INFORMATION FOR DIAGNOSIS
This manual contains the cable diagrams as well as the individual circuit drawings, operational explanations,
and troubleshooting hints for each component required to facilitate the task of troubleshooting. The
information is compiled in the following manner:
(1) Cable diagrams show the connector positions, etc., on the actual vehicle as well as the harness path.
(2) Circuit drawings show the configuration of the circuit with all switches in their normal positions.
(3) Operational explanations include circuit drawings of voltage flow when the switch is operated and how
the component operates in reaction.
(4) Troubleshooting hints include numerous examples of problems which might occur, traced backward in a
common-sense manner to the origin of the trouble. Problems whose origins may not be found in this
manner are pursued through the various system circuits.
NOTE
Components of ECI, ETACS. ECS, etc. with ECU do not include 3 and 4 above. For this information, refer
to a manual which includes details of these components.

-.
Changeover knob
16BO225
16D0226
INSPECTION
1. Visual and aural checks
Check relay operation, blower motor rotation, light illumina-
tion, etc. visually or aurally. The flow of current is’invisible but
can be checked by the operation of the parts. ’
I.
2. Slmple checks
For example, if a headlight does not come on and a faulty fuse
or poor grounding is suspected, replace the fuse with.a new
one or ground the light to the body by a jumper wire to deter-
mine which part is responsible for the problem.
3. Checking with instruments
Use an appropriate instrument in an adequate range and read
the indication correctly. You must have sufficient knowledge
and experience to handle instruments correctly.
INSPECTION INSTRUMENTS
In inspection, make use of the following instruments.
1. Test lights
A test light consists of a 12V bulb and lead wires. It is used
to check voltages or shortcircuits.
2. Self-power test light
A self-power test light consists of a bulb, battery and lead
wires connected in series. It is used to check continuity or
grounding.
L

8-18
TROUBLESHOOTING
16BO227
Ground T
Normal open (NO) type
OFF ON
’ ill& -//j
Current does not flow Current flows
1 Current flows ) Currentdoes n;;I;Is
3. Jumper wire
A jumper wire is used to close an open circuit. Never use one
to connect a power supply directly to a load.
4. Voltmeter
A voltmeter is used to measure the circuit voltage. Normally,
the positive (red lead) probe is applied to the point of voltage
measurement and the negative (black lead) probe to the body
ground.
5. Ohmmeder
An ohmmeter is used to check continuity or measure resis-
tance of a switch or coil. If the measuring range has been
changed, the zero point must be adjusted before measure-
ment.
CHECKING SWITCHES
In a circuit diagram, a switch is represented by a symbol and in the
idle state.
1. Normal open or normal close switch
Switches are classified into those which make the circuit open
and those which make the circuit closed when off.

TROUBLESHOOTING
849
16A0253
Coil
Iron
piece
.
Cover
Spring
Iron
core
Contact
1600231
Power supply
I I
10AO254
Current does not flow
I
I
Normal open (NO) type
Energized state
nml
a
Current flows
16AO250
2. SWITCH CONNECTION
This figure illustrates a complex switch. The continuity
between terminals at each position is as indicated in the
table below.
,.
-stage
I-
-.- -‘-J-
’ - ‘L
NOTE
o---O denotes continuity between terminals.
CHECKING RELAYS
1. When current flows through the coil of a relay, its core is
magnetized to attract the iron piece, closing (ON) the contact
at the tip of the iron piece. When the coil current is turned off,
the iron piece is made to return to its original position by a
spring, opening the contact (OFF).
,.
2. By using a relay, a heavy current can be turned on and off
by a switch of small capacity. For example, in the circuit
shown here, when the switch is turned on (closed), current
flows to the coil of the relay. Then, its contact is turned on
(closed) and the light comes on. The current flowing at this
time to the switch is the relay coil current only and is very
small.
3. The relays may be classified into the normal open type and the
normal close type by their contact construction.
NOTE
The deenergized state means that no current is flowing
through the coil and the energized state means that current is
flowing through the coil.

8-20 TROUBLESHOOTING
Normal close (NC) type
Deenergized state Energized state
i I
Current flows
Current does not flow
MAO257
1680235
State of fuse blown due to overcurrent
1680237
State of fuse blown due to thermal fatigue
When a normal close type relay as illustrated here is checked,
there should be continuity between terminals (1) and (2) and
between terminals 3 and 4 when the relay is deenergized,
and the continuity should be lost between terminals 3 and 4
when the battery voltage is applied to the terminals 1 and 2. A
relay can be checked in this manner and it cannot be deter-
mine if a relay is okay or faulty by checking its state only when
it is deenergized (or energized).
CHECKING FUSES
A blade type fuse has test taps provided to allow checking of
the fuse itself without removing it from the fuse block. The
fuse is okay if the test light comes on when its one lead is
connected to the test taps (one at a time) and the other lead is
grounded. (Change the ignition switch position adequately so
that the fuse circuit becomes live.)
CAUTlONS IN EVENT OF BLOWN FUSE
When a fuse is blown, there are two probable causes as follows
: One is that it is blown due to flow of current exceeding its rating.
The other is that it is blown due to repeated on/off current flowing
through it. Which of the two causes is responsible can be easily
determined by visual check as described below.
(1) Fuse blown due to current exceeding rating
The illustration shows the state of a fuse blown due to this
cause. In this case, do not replace the fuse with a new one
hastily since a current heavy enough to blow the fuse has
flowed through it. First, check the circuit for shorting and
check for abnormal electric parts. Only after the correction of
such shorting or parts, fuse of the same capacity should be
used as a replacement. Never use a fuse of lager capacity than
the one that has blown. If such a fuse is used, electric parts or
wirings could be damaged before the fuse blows in the event
an overcurrent occurs again.
(2) Fuse blown due to repeated current on/off
The illustration shows the state of a fuse blown due to re
peated current on/off. Normally, this type of problem occurs
after fairly long period of use and hence is less frequent than
the above type. In this case, you may simply replace with a
new fuse of the same capacity.