body MITSUBISHI 3000GT 1994 2.G Workshop Manual

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i Service Manual
3000~l-
1992-l 996
Volume
2
Electrical
FOREWORD
i
L
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 diagnossis,
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.
@
A
.
.,
WESUF’FORTVOLUNTARY TECHNICIAN
CERTiFiCATlON THROUGH
National lnaltute forAUTOMOTIV ESERVICEEXCELLENC E
Mitsubishi Motors Corporation reserves the right to make changesin design or to make additions to or improvements in its products withou\
timposing any obligations upon itself to install them on its productspreviously manufactured.
L
--
GROUP / SECTION INDEX
General. . . . . . . . . . . . . . . . . . . . . . . .
Fusible Link, Fuse an d IOD or
Storage Connector Locatio n
. . . . . . . . . .w
Inspection Terminal Location . . . . . . . . .
Grounding Location . . . . . . . . . . . . . . . . . .w
m
Relay Location . . . . . . . . . . . . . . . . . . . . . -m
Sensor Locatio
n. . . . . . . . . . . . . -. . . . . . .w
Control Unit Location . . . . . . . . . . . . . . . . .m
Solenoid, Solenoid Valve Location . . . . .d
Diode Location . . . . . . . . . . . . . . -. . . . . . .w
Junction Block . . . . . . . . . . . . . . . . . . . . . . .II
Centralized Junction . . . . . . . . . #. . . . . . .w
Harness Connector Inspectio n. I . . . . . .w
How to Diagnose . . . . . . . . . . . . . -. . . . . . .
111
Configuration Diagrams . . . . . . . . . . . - . .m;
Circuit Diagrams . . . ..*.............
Engine Electrical ...............
ChassisElectrical
............ .
Alphabetical Index .............
NOTE:
For information concerning all compo-
nents other than the electrical system and
on-vehicle service procedures for engines
and transmissions, refer to Volume 1
“Chassis & Body” of this paired Service
Manual.
For overhaul procedures of engines or
transmission, refer to the separately is-
sued Engine Service Manual or Manual/
Automatic Transmission Service Manual.
@ 1995 Mitsubishi Motors CorporationReprinted in USA

Downloaded from www.Manualslib.com manuals search engine GENERAL - Junction Block19
/
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To roofwiring -harness
Front
/ITo frontwiring harness
- TO instrument panel
wiring harness
Theft-
alarm
horn
relay
L ,.c !!II {+J . ,i/11
\oi
Z16FO304
Back
To bodywiringharness
W-9
Z16FOO5800002704
/
id
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Downloaded from www.Manualslib.com manuals search engine GENERAL - How to Diagnose
Changeover k&bZ1680224
Z1680225
INSPECTION1. Visual and aural checks
Check relay operation, blower motor rotation, light illumina-d
tion, etc. visually or aurally. The flow of current is invisiblebut can be checked by the operation of the parts.
2. Simple checks
For example, if a headlight does not come on and a faultyfuse or poor grounding is suspected, replace the fuse
with a new one or ground the light to the body by a jumper
wire to determine which part is responsible for the problem.3. Checking with instruments
Use an appropriate instrument in an adequate range andread 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 12 V bulb and lead wires. It
is used to check voltages or short circuits.
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.
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Downloaded from www.Manualslib.com manuals search engine GENERAL - How to Diagnose293. Jumper wire
A jumper wire is used to close an open circuit. Never
use one to connect a power supply directly to a load.
Z16602274. 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) probeto the body ground.
5. Ohmmeter
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 andin 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.
INormal open (NO) typeIOFF
/4-
1X
t
Current does not flow
16X0690
ON
1
a
ia
Current flows
16X0691
00000401
Normal close (NC) type
i===ONOFF
1
/4-
1X
Current does not flow16X0690
00000402
a
III
Current flows
16X0691
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Downloaded from www.Manualslib.com manuals search engine 32GENERAL - How to Diaanose
CHECKING CABLES AND WIRES1. Check connections for looseness, rust and stains.
2.Check terminals and wires for corrosion by battery electro-
lyte, etc.
3.Check terminals and wires for open circuit or impending
open circuit.4. Check wire insulation and coating for damage, cracks
and degrading.
5.Check conductive parts of terminals for contact with other
metallic parts (vehicle body and other parts).6. Check grounding parts to verify that there is complete
continuity between attaching bolt(s) and vehicle body.7. Check for incorrect wiring.
8.Check that wirings are so clamped as to prevent contact
with sharp corners of the vehicle body, etc. or hot parts(exhaust manifold, pipe, etc.).
9.Check that wirings are clamped firmly to secure enough
clearance from the fan pulley, fan belt and other rotating
or moving parts.
10. Check that the wirings between the fixed parts such as
the vehicle body and the vibrating parts such as the engine
are made with adequate allowance for vibrations.
HANDLING ON-VEHICLE BATTERY
When checking or servicing does not require power from the
on-vehicle battery, be sure to disconnect the cable from thebattery
(-) terminal. This is to prevent problems that could
be caused by a short circuit. Disconnect the (-) terminal first
and reconnect it last.
Caution1. Before connecting or disconnecting the negative
cable, be sure to turn off the ignition switch and the
lighting switch.
(If this is not done, there is the possibility of semicon-
ductor parts being damaged.)
2.After completion of the work steps [when the battery’s
negative (-)
terminal is connected], warm up the engineand allow it to idle for approximately five minutes
under the conditions described below, in order to sta-
bilize the engine control conditions, and then checkto be sure that the idling is satisfactory.
Engine coolant temperature:
85-95°C (185-203°F)
Lights, electric fans, accessories: OFF
Transaxle: neutral position
(A/T models: “N” or “P”)
Steering wheel: neutral (center) position
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Downloaded from www.Manualslib.com manuals search engine 36CONFIGURATION DIAGRAMS - Overall Configuration Diagram
OVERALL CONFIGURATION DIAGRAM
Roof wiring
CHBACK>Instrument panel
wiring harness
- ,;
/Front wiring“l,
Door wiring*harness
harness
.-----y ,,\.Body wiring
harness (LH)Y36FOO19

Body wiring
harness (RH)Roof wiring
Instrument panel
wiring harness
Control wiring/harness
Door wiring*
harness
/Z36FO124Front wiring‘x\..e----qT .\, ’ Body\Niring00002733
harness‘-*harness (LH)
NOTE
(1)This illustration shows only the major wiring harness.
(2)* indicates also equipped at the right side.
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Downloaded from www.Manualslib.com manuals search engine 50CONFIGURATION DIAGRAMS - Dash Panel
DASH PANEL
Connector
symbol
C
01thru
45
NOTE*I: 1992 models
*2: Up to 1995 models
c-01c-02
c-o.3
c-04x
C-06X
c-07x
C-08c-09
C-l 0
C-l 1
c-12
Body wiring harness (LH)
and front wiring harness combination
Body wiring harness (LH)
and front wiring harness combination
Body wiring harness (LH)
and front wiring harness combination
Door lock power relay 1
Defogger relay
Power window relay
Diode (for seat belt warning circuit)
Diode (for seat belt warning circuit)
Column switch
Column switch
Diode (for theft-alarm circuit)c-13
c-14
C-l 5
C-l 6
C-l 7
C-l 8
C-l 9c-20
c-21c-22
C-23
C-24
/ i
i
.m
/\\
LJ
Accelerator pedal switch*’
Control wiring harness and instrument panel
wiring harness combination
Body wiring harness (LH) and instrument panel
wiring harness combination
Air conditioning control panel
Air conditioning control panel
Air conditioning switch
Blower switch
Heater control panel illumination light
Blend air damper control motor
Mode selection damper control motor
Power transistor (for full-auto air conditioning
circuit)
Blower resistor
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Downloaded from www.Manualslib.com manuals search engine CONFIGURATION DIAGRAMS - Dash Panel51
C-32c-33
A36F0179
00004255
C-25
C-26
C-27
C-28c-29
c-30
c-31
C-32c-33
Air conditioning control unit

Air conditioning control
unit*2

Air-inlet sensor
Air selection damper control motor
Body wiring harness (LH) and control wiring
harness combination
Body wiring harness (LH) and control wiring
harness combination
Body wiring harness (LH) and front wiring
harness combination
Body wiring harness (RH) and front wiring
harness combination
Body wiring harness (RH) and front wiring
harness combinationc-34
c-35
C-36c-37
C-38c-39c-40
c-41
C-42c-43
C-44c-45Body wiring harness (LH) and body wiring
harness (RH) combination
Foot light (RH)Body wiring harness (RH) and control wiring
harness combination
Auto-cruise control unit
Blower motor
Blower motor relay (HI)
Air conditioning compressor lock controllerAir-inlet sensor
*2
Air-therm0 sensor
Engine coolant temperature sensorMFI relay
Over drive and power
/ economy switch
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Downloaded from www.Manualslib.com manuals search engine CONFIGURATION DIAGRAMS - Dash Panel53
c-86*3C-87*3c-88’3
-J-----1)!_1/t’ \.- -b!w
C-89*3
i
c-71
C-72c-73
c-74
C-76c-77
C-78c-79
C-80C-81
C-82Adapter wiring harness and junction block
combination
Theft-alarm horn relay
Blower motor relayRoof wiring harness and junction block
combinationBody wiring harness (LH) and junction block
combinationBody wiring harness (LH) and junction block
combinationBody wiring harness (LH) and junction block
combinationData link
connector*3Body wiring harness (LH) and junction block
combinationBody wiring harness (LH) and junction block
combinationBody wiring harness (LH) and junction block
combination
36FO17900004256
C-83
C-84
C-85
C-86
C-87
C-88
C-89c-90
c-91
c-92
c-93
c-94
c-95Body wiring harness (LH) and junction block
combination
Auto-cruise relay
Spare connector (Hand free microphone)
Passenger’s air bag
module*3
No connection
Control wiring harness and front wiring harness
combination*3Body wiring harness (LH) and body wiring
harness (RH) combination*3
Engine control module*3
for California>
Data link connector *4y*5
Engine control module*5MFI
relay*5
Body wiring harness (RH) and front wiring
harness combination*5
Motor antenna control unit*5
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Downloaded from www.Manualslib.com manuals search engine 54CONFIGURATION DIAGRAMS - Instrument Panel and Floor Console
INSTRUMENT PANEL AND FLOOR CONSOLED-11 D;‘2D-1 0 ‘.,, \
I
Connectorsymbol
D
later
1993 and
D-03
D-Or ~~\\ Id&
D-02
4D-49 _
D-4i /
D-41
D-36I- -’rL?A/D-:” “- D-331 D-30“-c.w -\D-31 D-29
D-01
D-02
D-03
D-04
D-05
D-06
D-08
D-09
D-l 0
D-11
D-12
D-13
D-14
D-15Pop-up switch and fog light switch
Front speaker (LH)
Combination meter
Combination meter
Combination meter
Defogger switch and ECS switch
Hazard switch
Combination gauge
Diode (for 4WS fluid level warning light circuit)
Glove box illumination light
Photo sensor
Front speaker (RH)
Glove box illumination light switch
Instrument panel wiring harness and control
wiring harness combination
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NOTE
I:I*l: Up to 1993 models*? Up to 1994 models
(3)
*3:From 1996 models
D-l 6
D-17
D-18
D-19
D-20
D-21
D-22
D-23
D-24
D-25
D-26
D-27
D-28
Instrument panel wiring harness and body
wiring harness
(RH) combination
Ashtray illumination light
Cigarette lighter
Cigarette lighter
Cigarette lighter illumination light
Power seat switch
Body wiring harness (LH) and console wiring
harness combination
SRS diagnosis unit
SRS diagnosis unit
SRS diagnosis unit*’
SRS diagnosis unit
ABS G sensor
Parking brake switch