light MITSUBISHI 3000GT 1992 2.G User Guide

Downloaded from www.Manualslib.com manuals search engine iGENERAL
- How to Diagnose31
Normal close (NC) type
Deenergized stateEnergized state
Current does not flow
Z1680235
State of fuse blown due to overcurrent
/
L
I21680237
State of fuse blown due to thermal fatigue
Z1660236When 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 betweenterminals 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 determined if a relay is okay
or faulty by checking its state only when it is deenergized
(or energized),
CHECKING FUSESA blade type fuse has test taps provided to allow checking
of the fuse itself without removing it from the fuse block. Thefuse 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 adequatelyso that the fuse circuit becomes live.)
CAUTIONS 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 larger 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
repeated 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 simplyreplace with a new fuse of the same capacity.
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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 L
iGENERAL
- How to Diagnose33
Power supply
Fuse
’ i
ON (2),----c//ISwitch
I
Motor
Z16AO260
GENERAL ELECTRICAL SYSTEM CHECKSA circuit consists of the power supply, switch, relay, load
ground, etc. There are various methods to check a
circui;
including an overall check, voltage check, short circuit checkand continuity check. Each of these methods is briefly de-
scribed in the following.
1. VOLTAGE CHECK
(1) Ground one lead wire of the test light. If a voltmeter
is used instead of the test light, ground the groundingside lead wire.
(2) Connect the other lead wire of the test light to the
power side terminal of the switch connector. The test
light should come on or the voltmeter should indicate
a voltage.
(3) Then, connect the test light or voltmeter to the motor
connector. The test light should not come on, or the
voltmeter should indicate no voltage. When the switch
is turned on in this state, the test light should come
on, or the voltmeter should indicate a voltage, with
motor starting to run.(4) The circuit illustrated here is normal but if there is
any problem such as the motor failing to run, check
voltages beginning at the connector nearest to themotor until the faulty part is identified.
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Downloaded from www.Manualslib.com manuals search engine GENERAL - How to Diagnose2. SHORT-CIRCUITS CHECK
A blown fuse indicates that a circuit is shorted. The circuit responsible can be determined by the
following procedures.Remove the blown fuse and connect a test light in its place
(Switch is in the OFF position)
Test light comes on
+
NO
1 Short circuit between fuse block and switch (A)Turn on the switch
(Test light comes on but the illumination light does not come on)ItDisconnect the illumination light connector
I+Test light remains on
iNO
Short circuit between the illumination light connector and illumina-tion liaht ((3
Short circuit between the switch and illumination
light connector (B)A
Power supply
(Remove the fuse.)
1OFF
gi
location
Switch
a
Illuminationfight
16.4om2
BPower supply
Fuse block(Remove
the fuse.)
* Disconnect the load
iii
Illumination
light
T16Aom
13. CONTINUITY CHECK
Self powertest light
(or ohmmeter)
Z16AO269
C
Power supply
Test
lightFuse block
(Remove the fuse.)
Switch
Disconnect the load
ii
Short-circuit- location
Illumination
light
16Alncd?00000741
(1) When the switch is in the OFF position, the self powertest light should come on or the ohmmeter should
read 0 ohm only when the terminals 1 and 2 are inter-
connected.
(2) When the switch is in the ON position, the self powertest light should come on or the ohmmeter should
read 0 ohm only when the terminals 3 and 4 are inter-
connected.
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Downloaded from www.Manualslib.com manuals search engine CONFIGURATION DIAGRAMS - How to Read Configuration Diagram37
,lHOW TO READ CONFIGURATION DIAGRAM
id actual vehicles.
L
Denotes connector No.The same connector No. is used throughout the circuit dia-
grams to facilitate connector location searches. The first al-
phabetical symbol indicates the location site of the connector
and a number that follows in the unique number. Numbers areassigned to parts in clockwise order on the diagram.
Examole: A-l 2
/Number specific to connector (serial number)
Connector location site symbol
A: Engine compartment
B: Engine and transaxle
C: Dash panel
D: Instrument panel and floor consoleE: Interior
F: Luggage compartment
Denotes ground point.Same ground number is used throughout cir-cuit diagrams to facilitate search of ground
point. Refer to P.4 for details of ground points.
A-01X
A-02X
A-03X
A-04X
A-05X
A-06X
A-07X
A-08X
A-09X
A AL\,
$~~~;~.--.-.*/hhA, ”
L^---,.-I II-m 1 lta>.I
J
n-1°KA-11X
\
LI
ueriotes a sermon covereaby a corrugated tube.236F0122
A-01X Headlight relayA-18A-02X ABS power relayA-l 9ignition timing adjustment connector
Front washer motorA-03X Fog light relayA-20
A-04XRadiator fan motor relay(L0)A-21Evaporative emission purge solenoid
EGR solenoidA-05X Taillight relay
A-06X Horn relay
A-22(Vehicles for California)
A-07X Radiator fan motor relay (HI)EGR temperature sensor
A-09X Starter relayA-23(Vehicles for California)
No connection A-l OX Generator relayA-24Brake fluid level sensorA-11XIOD or Storage connectorA-25
A-12ABS front speed sensor (RH)A-26ECS front shock absorber (LH)
Theft-alarm horn
A-13Theft-alarm horn
A-14ECS front shock absorber (RH)A-27
Washer fluid level sensorA-28
Auto-cruise vacuum pump
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Downloaded from www.Manualslib.com manuals search engine 38CONFIGURATION DIAGRAMS - Engine Compartment
ENGINE COMPARTMENT
(UP TO 1993 MODELS)
Connector
symbol
A
01xthru
34X

A-20A-21
A-22
A-01X
A-02X
A-03X
A-04X
A-05X
A-06X
A-07X
A-08X
A-09XHeadlight relayABS power relay
Fog light relay
Radiator fan motor relay (LO)
Taillight relay
Horn relay
Radiator fan motor relay (HI)
Pop-up motor relayStarter
relavA-12 A-13A-14 A-15 A-16A:174-18
A-79 q-20 A:21 4-22
A-10X
A-11X
A-12
A-13
A-14
A-l 5
A-16
A-17
A-18Generator relayIOD or Storage connector
ABS front speed sensor (RH)
ECS front shock absorber (RH)
Washer fluid level sensor
Front wiper motor
Engine speed detection connector
Fuel pump check connector
Ignition timing adjustment connector
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Downloaded from www.Manualslib.com manuals search engine CONFIGURATION DIAGRAMS - Engine Compartment

A-69A-70
\ \
36FOO14
A-35
A-36
A-37
A-38
A-39
A-40
A-41
A-42
A-43
A-44A-72 A-71A-67+
A-5
A-57 A-55A-54 A-53 A-52 A-51A-47A-48
A-49
A-50
Dual pressure switchAir conditioning relay box
Air conditioning relay box
SW front impact sensor (LH)
Front combination light (LH)inspection light switch
Headlight (LH)Front wiring harness and headlight wiring
harness (LH) combination
Fog light (LH)
POWJO motor (LH)A-45
A-46
A-47
A-48
A-49
A-50
A-51
A-52
A-53
A-54
A-55
Condenser fan motor
Condenser fan motor
Horn
Horn
Horn
Horn
Fuel pump resistor
A/T fluid temperature sensor
Kickdown servo switch GAIT>
Pulse generator
Radiator fan motor
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Downloaded from www.Manualslib.com manuals search engine CONFIGURATION DIAGRAMS - Engine CompartmentENGINE
HOOD
A-73
\
/I IIA-46 A-45 A-44
A-43A-42
A-56
A-57A-58
A-59
A-60
A-61A-62
A-63
A-64
A-65
Engine coolant level sensorActive aero front venturi skirt
Fog light (RH)
Pop-up motor (RH)
Front wiring harness and headlight wiring
harness (RH) combination
Headlight (RH)
Front combination light (RH)
SRS front impact sensor (RH)
ABS hydraulic unit
ABS hydraulic unit
A-66Hood switch
A-67
Front wiring harness and control wiring harness
combination
A-66
Diode (for ABS circuit)
A-69
Resistor
A-70
Turbocharger waste gate solenoid
A-71
Fuel pressure solenoid
A-72
Control wiring harness and solenoid valve
harness combination
A-73
Inspection light
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Downloaded from www.Manualslib.com manuals search engine 42CONFIGURATION DIAGRAMS - Engine Compartment
ENGINE COMPARTMENT
(FROM 1994 MODELS)
A01xthru
34X
A-20 A-21
A-22
NOTE*: Up to 1995 models
A-01X
A-02X
A-03X
A-04X
A-05X
A-06X
A-07X
A-09X
A-l OX
A-12A-13 A-14A-15 A-17A-01X!i\1 A-16 /A-18 A-19 A-20 A-21 A-22/I
Headlight relay
ABS power relay
Fog light relay
Radiator fan motor relay (LO)
Taillight relay
Horn relay
Radiator fan motor relay (HI)
Starter relay
Generator relayA-11XIOD or Storage connector
A-12ABS front speed sensor (RH)
A-13ECS front shock absorber (RH)*
A-14
Washer fluid level sensor
A-15Front wiper motor
A-16Engine speed detection connector
A-17Fuel pump check connector
A-18Ignition timing adjustment connector
A-l 9Front washer motorTSB
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Downloaded from www.Manualslib.com manuals search engine 44CONFIGURATION DIAGRAMS - Engine Compartment
Connector
symbol
A
35
thru
79
A 6gA-70
36FOOl4
A-72A-71A-67
:
A-64 --+py>
A-77\ \
A-49
A-50
NOTE*t: Up to 1995 models*2: From 1996 models
A-35
A-36
A-37
A-38
A-39
A-40
A-41
A-43
A-44
A-45
A-46
Dual pressure switchAir conditioning relay box
Air conditioning relay box
SRS front impact sensor (LH)
Front combination light (LH)
Inspection light switch
Headlight (LO, HI)
Fog light (LH)
Pop-up motor (LH)
Condenser fan motor
Condenser fan motor
TSB RevisionA 47
HornA
48HornA 49
HornA 50
Horn
A-51Fuel pump resistor
A-52AIT fluid temperature sensor
A-53
Kickdown servo switch
A-54Pulse generator CA/T>
A-55Radiator fan motor
A-56Engine coolant level sensor
A-57Active aero front venturi skirt
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