1994 MITSUBISHI 3000GT Disc

Downloaded from www.Manualslib.com manuals search engine 54-8CHASSIS ELECTRICAL - Ignition Switch
216AO57000002296INSPECTION
IGNITION SWITCH CHECK
(1) Remove the knee protector, the column cover lower andd’
the column cover upper. (Refer to GROUP 52A - Instru-
ment Panel.)
(2) Disconnect the wiring connector from the ignition switch
and key reminder switch, and connect an ohmmeter to
the switch side connector.(3) Operate the switch, and check the continuity between
the terminals.
PositionKeyConnector AConnector B
LOCK
ACC
ON
START
ConnectorB
ignitionkey
illumina-
tion light
terminal
No.
415
LJ
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Downloaded from www.Manualslib.com manuals search engine 54-18CHASSIS ELECTRICAL - Meters and Gauges
OPERATION
l
When the ignition key is at the “ON” position,the fuel gauge is activated.
l
When there is much fuel, the unit’s resistanceis small and the current flowing in the circuit
is great, so the gauge’s indicator indicates inthe “F” area.
l When there is little fuel, the unit’s resistance
is high and the current flowing in the circuit
is small, so the gauge’s indicator indicates inthe
“E” area.

lWhen the ignition key is at the “ON” position,
the engine coolant temperature gauge is acti-
vated.l
When the engine coolant temperature is high,
the unit’s resistance is low and there is a greatflow of current in the circuit, so the gauge’s
indicator indicates in the “H” area.
l
When the engine coolant temperature is low,
the unit’s resistance is high and there is a smallflow of current in the circuit, so the gauge’s
indicator indicates in the “C” area.
/Speed sensor (electrical speedometer type)>l Pulses are produced in accordance with the
vehicle speed, and vehicle-speed signals areinput to systems (the MFI system, etc.) that
regulate according to the vehicle speed.
TROUBLESHOOTING HINTS
1.The fuel gauge doesn’t function, or shows the
incorrect indication.
(1) Disconnect the connector of the fuel pumpand gauge unit assembly; the ‘F” side is
indicated when terminal (5) is then
grounded.l Check the fuel gauge.
2.The engine coolant temperature gauge doesn’t
function, or shows the incorrect indication.
(1)The “l-l” side is indicated when the connector
of the engine coolant temperature gauge
unit is disconnected and then grounded.l
Check the engine coolant temperature
gauge unit.
3. Systems dependent upon control according to
the vehicle speed do not function correctly.l Check the reed switch (mechanical
speedometer type)l Check the speed sensor (electrical
speedometer type)
coil pressure gauge>l
When the ignition key is at the “ON” position,
the oil pressure gauge is activated.
lWhen oil pressure is high, the internal contacts
of the gauge unit are kept closed for a longerperiod of time. This causes more current to
flow in the circuit, and the gauge pointer swings
to the high pressure side.
lWhen oil pressure is low, the internal contactsof the gauge unit open in a shorter period of
time. Therefore, there is less current flowing
in the circuit and the gauge pointer swings to
the low pressure side.

lWhen the ignition key is set to the “ON” position,the gauge indicator will be at
“0”.l
When the engine is started, the indicator will
move from
“0” to the minus (-) side, and then,as the boost level increases, it will move to
the plus
(+) side.
l When the ignition key is placed in the “ON”
position, the voltage gauge operates and indi-
cates a battery voltage of approximately 12 V.l
When the engine is started, the voltage gauge
indicates a battery voltage of 12 to 16 V, indicat-ing that the battery is on charge.
4. The oil pressure gauge doesn’t function, or
shows the incorrect indication.
(1)The “H” side is indicated when the connectorof the oil pressure gauge unit is discon-
nected and then grounded.l Check the oil pressure gauge unit.
5.The meter illumination light does not illuminate.
(1) The tail lights illuminate.l Check the rheostat.
6. The voltage gauge doesn’t function, or shows
the incorrect indication.l Check the voltage gauge.
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Downloaded from www.Manualslib.com manuals search engine CHASSIS ELECTRICAL - Meters and Gauges54-31
COMBINATION METERS
LREMOVAL AND INSTALLATION
76FO22200002364
NOTE
*: 1992 models
L/
:i:
- lnstiument PineI.)
2. Column cover, lower
3. Column cover, upper 1. Knee protector (Refer
G GROUP 52A4. Meter bezel
* ’5. Combination meter
Removal steps6. Adapter* (Mechanical speedometer
type) /Washer tank (Refer to GROUP
51 - Windshield Wiper and Washer.)7. Vehicles speed sensor (Electrical
Front of ve
219FOl;
speedometer type)REMOVAL SERVICE POINTS
dAbCOLUMN COVER LOWER / COLUMN COVER
UPPER REMOVAL
After the screws have been removed, remove the covers,while making sure not to break the grippers.
dB, ADAPTER REMOVAL TYP-
(1) Disconnect the speedometer cable at the transaxle
end of the cable.
(2) Pull the speedometer cable slightly toward the vehicleinterior, release the lock by turning the adaptor to
the left or right, and then remove the adapter.
Adapter-Y16FO129],
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Downloaded from www.Manualslib.com manuals search engine INPUT SIGNALWith voltmeterData link connector
Ii ri7-11
When using the scan tool (MUT) or voltmeter‘d
Using the scan tool or voltmeter, check whether or not the
input signals from each switch are being input to the ETACS
unit.
54-56CHASSIS ELECTRICAL - Lighting System
(1) Connect the scan tool to the data link connector located
at the right side of the junction block or connect the voltme-
ter between the ETACS terminal and the ground terminal.
(2) Check if the buzzer of the scan tool sounds or the needle
of the voltmeter moves when each switch is operated.
If the buzzer sounds or the needle moves, the input signalsare being input to the ETACS unit, so that switch can
be considered to be functioning normally. If not, the switch
or switch input circuit is faulty. Check the switch and the
switch input circuit.
When using the MUT-II
CUP to 1993 models>
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( 1 1 1 2 1; 1 4% 16 1 7 1 8 / 1
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~~~4i10illi12i13illi15i16v~~~1 \ \ 1U2OFO163

When using the scan tool (MUT-II)
(1) Connect the scan tool to the data link connector. When
connecting the scan tool to a vehicle up to 1993 models,
use the adapter harness supplied together.‘dCaution
Turn off the ignition switch beforehand whenever the
scan tool is connected or disconnected.
(2) If the scan tool makes a peep sound when each switchis operated (turned ON/OFF), the input signal to ECU
is normally sent from the switch circuit system.
I
When using the voltmeter
(1)Connect a voltmeter to the ETACS terminal and the ground
terminal of the data link connector using the special tool.
(2) If the voltmeter pointer deflects once when each switchis operated (turned ON/OFF), the input signal to ECU
is normally sent from the switch circuit system.
do
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Downloaded from www.Manualslib.com manuals search engine With voltmeterData link connector
’‘:’ ’ ’- Data linkGround ETA,CS 21~33300002230
54-80CHASSIS ELECTRICAL - Lighting System
INPUT SIGNAL

When using the scan tool (MUT) or voltmeter
Using the scan tool or voltmeter, check whether or not the
input signals from each switch are being input to the ETACS
unit.
(1) Connect the scan tool to the data link connector located
at the right side of the junction block or connect the voltme-
ter between the ETACS terminal and the ground terminal.
(2) Check if the buzzer of the scan tool sounds or the needleof the voltmeter moves when each switch is operated.
If the buzzer sounds or the needle moves, the input signalsare being input to the ETACS unit, so that switch can
be considered to be functioning normally. If not, the switch
or switch input circuit is faulty. Check the switch and the
switch input circuit.
When using the MUT-II
cup to 1993 models>
Y2OFOl6400002231
#\,I kQwnd\ \U2OFO163

When using the scan tool (MUT-II)
(1) Connect the scan tool to the data link connector. When
connecting the scan tool to a vehicle up to 1993 models,
use the adapter harness supplied together.
Caution
Turn off the ignition switch beforehand whenever thescan tool is connected or disconnected.
(2) If the scan tool makes a peep sound when each switchis operation (turned ON/OFF), the input signal to ECU
is normally sent from the switch circuit system.
When using the voltmeter
(1)Connect a voltmeter to the ETACS terminal and the ground
terminal of the data link connector using the special tool.
(2) If the voltmeter pointer deflects once when each switchis operated (turned ON/OFF), the input signal to ECU
is normally sent from the switch circuit system.
Ii3
\ ~
id ~
!Lj
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Downloaded from www.Manualslib.com manuals search engine 1. When operation is normal
l
When the ignition switch is switched to the
ON position, battery voltage is applied (viathe multipurpose fuse (11) and hazard
switch) to the turn-signal and hazard flasher
unit.l
When the turn-signal switch is switched to
the LH position,
Trl (within the flasher unit)
is switched ON and OFF repeatedly.
Then the contacts of the relay 1 (also within
the flasher unit) repeatedly switch from ON
to OFF, causing the turn-signal lights and
turn-signal indicator light LH to flash.l
When the turn-signal switch is switched to
the RH position, Tr2 (within the flasher unit)
is switched ON and OFF repeatedly.Then the contacts of relay 2 (also within
the flasher unit) repeatedly switch from ON
to OFF, causing the turn-signal lights and
turn-signal indicator light RH to flash.2. If one of the bulbs is burned out
lIf the LH (or RH) turn-signal light bulb is
burned-out, the resistance of the turn-signalcircuit as a whole increases, resulting in
Lshorter ON and OFF intervals of the LHTrl (or RH Tr2) and a higher flashing rateof the LH lights (or RH lights).CHASSIS ELECTRICAL
- Lighting System54-89
TURN-SIGNAL LIGHT AND HAZARD
L
LIGHT
OPERATION
lWhen the hazard-warning switch is switch-
ed to the “ON” position, the relay contactof the turn signal and hazard flasher unit
is switched ON and OFF repeatedly, in thesame manner as for the operation of the
turn-signal lights, and the left and right turn-
signal lights and turn-signal indicator lights
simultaneously flash repeatedly.
NOTE
(1) The number of flashes of the hazard-warn-
ing lights does not change if there is dam-
aged or disconnected wiring of one light.
(2)The light automatic shut-OFF system is valid
for the illumination light of the hazard switch.(Refer to
P.54-37.)
TROUBLESHOOTING HINTS
1.The turn-signal lights and hazard-warning lightsdo not operate at all.
l Check the hazard switch contact (power
supply side).l Check the turn-signal and hazard flasher
unit.2. All turn-signal lights at the left (or right) side
do not function.
(1) The hazard-warning lights function normal-
ly-lCheck the hazard switch contact (turn-
signal side).l Check the turn-signal switch.
3.The number of flashes of the turn-signal lights
is excessive.l Check the bulbs.
4. The hazard-warning lights do not function.
(1) The turn-signal lights function normally.l
Check the hazard switch contact (haz-
ard-warning light side).
NOTE
For the troubleshooting hints of the automatic lightshut-OFF system, refer to
P.54-37.
COMPONENT LOCATION
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Downloaded from www.Manualslib.com manuals search engine CHASSIS ELECTRICAL - Lighting System
Up to 1993 modelsFrom 1994 mod&
__ _..--.
Vertical center lineZ16FO509
JHot
z&ky M-j’ Within~ Within600mm1mm (in.)600 mm
(23.6)
(23.6)
Note l ’ Up to 1993 modelsl 2 From 1994 models
1 Etomj
0000236600002387
LUMINOUS INTENSITY MEASUREMENT
Measure the luminous intensity of headlights with a photo-me-ter in accordance with the instruction manual prepared by
the manufacturer of the photometer and make sure that the
luminous intensity is within the following limit.Limit: 20,000 cd or more
NOTE
(1) When measuring the luminous intensity of headlight, keepthe engine at 2,000 rpm and have the battery charged.
(2) If there are specific regulations for luminous intensity ofheadlights in the region where the vehicle is operated,
make sure that the intensity conforms to the requirements
of such regulations.
FOG LIGHT AIMING
1.Place vehicle on a known level floor 7.6 m (25 feet) from
aiming screen or light colored wall.
2. Use adjusting screw to adjust the top end of high intensity
zone to dimension A.
BULB REPLACEMENT
1. Disconnect the connector.
2. Turn the bulb socket counterclockwise to pull it out.
Caution
Do not touch the surface of the headlight bulb with handsor dirty gloves. If the surface dies become dirty, clean
it with alcohol or thinner, and let it dry thoroughly before
installing.
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Downloaded from www.Manualslib.com manuals search engine HEADLIGHT
CHASSIS ELECTRICAL - Lighting System54-103
REMOVAL AND INSTALLATION
(From 1994 models)
(Up to 1993 models)
Removal steps (From 1994 models)
1. Front combination light
2. Headlight
4Bb
4WFOOB100002389
Removal steps (Up to 1993 models)
1. Headlight bezel, upper
2. Headlight bezel, lower
3.Retaining ring4.Headlight5.Spring6.Mounting ring7.Housing8.Rod assembly9.Headlight hood
10.Link assembly11. Boot12. Pop-up motor
REMOVAL SERVICE POINTS
+A, HEADLIGHT BEZEL, UPPER REMOVAL(1) Raise the headlights by using the pop-up switch.
Disconnect the negative (-) battery terminal.(2) Remove the headlight bezel, upper.
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