lights MITSUBISHI 3000GT 1994 2.G Owner's Manual

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- Meters and Gauges54-27
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L:FUEL GAUGE SIMPLE CHECKTACHOMETER CHECK
(1)insert paper clip into the engine revolution speed detection
terminal provided in the engine compartment, and connectthe engine tachometer to the inserted paper clip.
Caution
As the tachometer is negative grounded, do not con-
nect battery conversely to prevent damaging transis-tor and diode.
NOTE
For tachometer inspection, use of a fluxmeter-type engine
tachometer is recommended. (Because a fluxmeter onlyneeds to be clipped to the high tension cable.)
(2) Connect the engine tachometer and compare the engine
tachometer and tachometer readings. Replace tachometer
if difference is excessive.
Standard value:1,000
f 100 rpm
3,000
+ 150 rpm
5,000
f 250 rpm
6,000
f 300 rpm
CautionThe engine speed signal output from the engine is
one-third of the actual speed. When the engine speed
is measured, make sure that the engine tachometeris placed in the
2-cylinder range. (The real speed is
indicated.)
Connect a test light to the harness con-nector.
Place the ignition switch in the ON posi-
tion.Check the test light and gauge conditions.
1 (1) Test light lights. (Pointer of gauge does not swing.)/-.-I Replace fuel gauge.
[ (2) Test light lights. (Pointer of gauge swings.)/-.--I Replace fuel gauge unit.1
1 (3) Test light does not light. (Pointer of gauge does not swing.)k-1 Correct harness.I
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Downloaded from www.Manualslib.com manuals search engine 54-28CHASSIS ELECTRICAL - Meters and Gauges
16FO11500002300
16Fo255 00002383
FUEL GAUGE UNIT CHECKTo check, remove fuel gauge unit from fuel tank. (Refer to
GROUP 13F
- Fuel Tank.)
Fuel Gauge Unit Resistance
(1)Check that resistance value between the fuel gauge termi-
nal and ground terminal is at standard value when fuel
gauge unit float is at point F (highest) and point E (lowest).
Standard value:Point F: 3
If: 2 GPoint E: 110
It 7 Q
(2) Check that resistance value changes smoothly when float
moves slowly between point F (highest) and point E (low-
est).Fuel Gauge Unit Float Height
Move float and measure the height at point F (highest) and
point E (lowest) with float arm touching stopper.
Standard value:Point F: 18.6-21.6 mm (.73-.85 in.)
Point E: 193.4-196.4 mm (7.61-7.73 in.)
FUEL SENSOR CHECKConnect fuel gauge unit to battery via test light (12 V-3.4
W). Immerse in water. Condition good if light goes off whenunit thermistor is in water and lights when unit is removed
from water.
CautionwAfter completing this test, wipe the unit dry and install
it in the fuel tank.
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Downloaded from www.Manualslib.com manuals search engine CHASSIS ELECTRICAL - Meters and Gauaes
i
ENGINE COOLANT TEMPERATURE GAUGE SIMPLE CHECKConnect the harness connector via a
test light to the ground.
Remove the water temperature gauge
unit coupling connector.
t
Place the ignition switch in the ON posi-tion.
I
(12 v’3.4 w) \ //Z16FO13lCheck the test light and gauge conditions.
i(1) Test light lights. (Pointer of gauge does not swing.)_____c Replace water temperature gauge.
[ (2) Test light lights. (Pointer of gauge swings.)Replace water temperature gauge unit.
[ (3) Test light does not light. (Pointer of gauge does not swing.)/-------I Correct harness.
ENGINE COOLANT TEMPERATURE GAUGE UNIT CHECK
To check, remove engine coolant temperature gauge unit from
the thermostat housing.
Engine Coolant Temperature Gauge Unit Resistance
(1)Immerse unit in 70°C (158OF) water to measure resistance.Standard value: 104
f 13.5 Sz(2) After checking, apply the specified sealant around the
thread of engine coolant temperature gauge unit and install
on the thermostat housing.
Specified sealant:3M Nut Locking Part No. 4171 or equivalent
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Downloaded from www.Manualslib.com manuals search engine 54-30CHASSIS ELECTRICAL - Meters and Gauges
OIL PRESSURE GAUGE SIMPLE CHECKRemove the oil pressure gauge unit
coupling connector.Connect the harness connector via a
test light to the ground.
-1Place the ignition switch in the ON posi-Check the test light and gauge conditions.
(1) Test light lights. (Pointer of gauge does not swing.)
k-1 Replace oil pressure gauge.
1 (2) Test light lights. (Pointer of gauge swings.)k-1 Replace oil pressure gauge unit.
1 (2) Test light does not light. (Pointer of gauge does not swing.)/-1 Correct harness.
VOLTAGE GAUGE SIMPLE CHECKCheck voltage gauge for conditions.
(1) Voltage indicated by voltmeter differs from voltage indicated by
voltage gauge (position indicated by pointer).
-1 Replace gauge.
(2) Gauge does not operate.
/--I Correct harness or replace gauge.
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Downloaded from www.Manualslib.com manuals search engine CHASSIS ELECTRICAL - Lighting System
LIGHTING SYSTEM
54-35
L/ SPECIFICATIONSGENERAL SPECIFICATIONS
Exterior lights
ItemsSpecificationsHeadlight W
65/45*‘, 60151 *2Fog light W
55
Front combination light
Turn-signal light / side marker light CP27/8 (1157)” or 27 (1156)*2
Rear combination lightTurn-signal light / side marker and tail light CP32/2 (2057)
Stop light / side maker and tail lightCP32/2 (2057)
Back-up light CP
32 (1156)
License plate light CP3 (168)
High-mountedstop
Vehicles without rear spoiler CP32 (1156)
light
Vehicles with fixed rear spoiler W4
Vehicles with active rear spoiler
Engine compartment inspection light WLED (Light Emitting Diode)3.8 (194)
Interior
lights
ItemsFoot light WSpecifications
3.4 (158)
IDome light W8ISpot light W
8Door light W
5
Glove compartment light W
Luggage compartment light W3.4 (158)
5
NOTE
;he values in parentheses denote SAE trade number.
Up to 1993 models
l 2From 1994 modelsSERVICE SPECIFICATIONS
ItemsLimitI
Headlight intensity
I
20,000 cd or moreI
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Downloaded from www.Manualslib.com manuals search engine CHASSIS ELECTRICAL - Lighting System54-37
i
TROUBLESHOOTING
LHEADLIGHT
OPERATION

lTurn the lighting switch to “HEAD”, and the con-
tact point of the headlight relay will be closedto turn “ON” the headlight relay.
lWhen the dimmer switch is placed in the LO
position, the headlight low-beams go on. On
vehicles up to 1993 model, when the switch
is placed in the HI position, the headlight high-
beams go on. On vehicles from 1994 model,when the switch is placed in the HI position,
the headlight high-beams and low-beams go
on.
l
When the high-beam is lit or when the passing
switch is activated, the high-beam indicator lightwill be lit.
l
If the driver’s door is opened after the ignition
switch is turned to “OFF” or the ignition switchis turned to “OFF” after the driver’s door is
opened when the headlights are lit, the currentwhich flows to the coil side of the headlight
relay will be cut off by the light automatic shut-OFF unit opening the contact point, and the
headlight relay will be turned “OFF” to automati-
cally shut off the headlights.l
To turn the headlights on again after they are
automatically shut off, turn the lighting switchto “OFF” once and then back to “HEAD”, or
turn the ignition switch to “ACC” or “ON”, and
the
aut0mati.c shut-OFF will be cancelled andthe current will flow from the light automatic
shut-OFF unit to the coil side of the headlightrelay again to close the contact point. Thus,
the headlight relay will be turned “ON” to turnon the headlights.
NOTEWhen the lighting switch is at “HEAD”, the light
automatic shut-OFF system is valid for tail lights,
parking and side marker lights, license plate light,
illumination light, etc.(Refer to
P.54-70.)
(Up to 1993 models)by lighting
l
When the lighting switch is placed in the HEAD
position, current flows through multi-purpose
fuse (6) to the lighting switch, and the ETACScontrol unit. Then the UP timer circuit in the
LETACS control unit is operated, and currentflows from the ETACS control unit to the U con-tact of the pop-up motor U/D (UP/DOWN)
switch, the coil of the pop-up motor relay and
ground, causing the contacts of the pop-up mo-
tor relay to close.
When the contacts of the pop-up motor relay
close, current flows through the contacts of the
pop-up motor relay to the pop-up motor and
ground, causing the pop-up motor to rotate,
which brings the headlights to the UP position.
The pop-up motor rotates until the automatic
UP stop position is reached, then the contactsof the interlocked U/D (UP/DOWN) switch
change from the U to D contacts. As a result,
the contacts of the pop-up motor relay opento cut off the current supplied to the pop-up
motor. Then the pop-up motor ceases to rotate,
holding the headlights in the UP position.l
When the lighting switch is placed in the TAIL
or OFF position, current flows through the multi-
purpose fuse (6) to the lighting switch, and the
ETACS control unit. Then the DOWN timer cir-
cuit in the ETACS control unit is operated and
current flows from the ETACS control unit to
the DOWN contacts of the pop-up motor U/D
(UP/DOWN) switch, the coil of the pop-up motor
relay and ground, causing the contacts of the
pop-up motor relay to close.
When the contacts of the pop-up motor relay
close, current flows through the contacts of the
pop-up motor relay to the pop-up motor andground, causing the pop-up motor to rotate,
which brings the headlights to the DOWN posi-
tion.
The pop-up motor rotates until the automatic
DOWN stop position is reached, then the con-
tacts of the interlocked U/D (UP/DOWN) switch
change from the D to U contacts. As a result,
the contacts of the pop-up motor relay open
to cut off current supply to the pop-up motor.
Then the pop-up motor ceases to rotate, holding
the headlights in the DOWN position.
switch> (Up to 1993 models)by POPUPl
When the pop-up switch is placed in the UP
position, current flows through multi-purpose
fuse (6) to the lighting switch, the pop-up switch
and the ETACS control unit, which brings the
headlights to the UP position and holds them
in the UP position just like when they are oper-
ated by the lighting switch.l
When the pop-up switch is placed in the DOWN
position, current flows through the multi-purpose
fuse (6) to the lighting switch, the pop-up switch
and the ETACS control unit, which brings the
headlights to the DOWN position and holds them
in the DOWN position just like when they are
operated by the lighting switch.
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Downloaded from www.Manualslib.com manuals search engine CHASSIS ELECTRICAL - Liahting System
TROUBLESHOOTING
Check the light aut
Refer to
P.54-108.
headlights is normal.
Taillights are not automati-
Check the driver’ssidedoor switch.tally
shut off either.
NOTE(1) *Up to 1993 models
(2) For information concerning the theft-alarm system, refer to
P.54-222.
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Downloaded from www.Manualslib.com manuals search engine 54-50CHASSIS ELECTRICAL - Lighting System
CIRCUIT DIAGRAM
(CONTINUED)
0.85E
HEADLIGHT!djE2;bIGHT g;ikj
IT
1.25R3.85B
(c-01)
(R-Y)
(c-10:
(R-Y)G-Y
(R-Y)G-YON’-
/OFF‘
Tl
1-------------------!
2B 't;
2B,,3 (c-76)
J/B A
3------
---I'iEAOOFT LI*
7---T
4;‘;.--
i
?B
I------- -----
14
TAILLIGHTsPARKINGBIDEMARKER LIGHT AND
LICENSE PLATE LIGHT
1G-Y
10-----; COLUMN
-1I SWITCH
HR08M02BA1
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Downloaded from www.Manualslib.com manuals search engine 54-62CHASSIS ELECTRICAL - Lighting System
OPERATION
lWhen the fog light switch is placed in the ON position with the lighting switch in the HEAD positionand the dimmer switch in the LO position, current flows through the dedicated fuse (4) to the coil
of the fog light relay, the fog light switch, the dimmer switch and ground, causing the contacts of
the fog light relay to close.
When the contacts of the fog light relay close, current flows through the dedicated fuse (4) to the
contacts of the fog light relay, the fog lights and ground, causing the fog lights to come on.
lWhen the dimmer switch is placed in the HI position or the lighting switch is placed in the TAIL or
OFF position while the fog lights are ON, current supply to the fog light relay or headlight relay is
cut off. As a result, the contacts of the fog light relay open, and the fog lights go out.
NOTE
The fog lights are included in the light automatic shut-OFF system. (Refer to P.54-37). The indicator lights
are also included in the same system.
Fog Lights Operation Conditions
Fog light switchLighting switchDimmer switchFog lights
ON position
1 OFF position or TAIL posi- 1 LO position1 OFF
tion
HEAD positionHI position
LO position
OFF
ON
HI position
I
OFF
TROUBLESHOOTING HINTS1. The right or left fog lights only go on.
0Check the bulb.2. Fog lights do not go on when the fog light switch is set at ON.
0Check the dedicated fuse (4).
0Check the fog light relay. (Refer to P.54-108).
0Check the fog light switch.
NOTEFor the light automatic shut-OFF system troubleshooting hints, refer to
P.54-38.
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Downloaded from www.Manualslib.com manuals search engine 54-70CHASSIS ELECTRICAL - Lighting System
OPERATION
0When the lighting switch is placed in the TAILor HEAD position, current flows through the
coil of the tail light relay to the lighting switchand ground, causing the contacts of the tail
light relay to close.
Then current flows through the contacts of thetail light relay to the dedicated fuse
(2) the
individual lights and ground, causing the tail
lights, parking/side marker lights and licenseplate lights to go ON.

lIf the driver’s door is opened after the ignition
switch is turned to “OFF” or the ignition switchis turned to “OFF” after the driver’s door is
opened when the tail lights are lit, the current
which flows to the coil side of the tail light relaywill be cut off by the light automatic shut-off
unit opening the contact point, and the tail light
relay will be turned “OFF’ to automatically shut
off the tail lights, parking and front side marker
lights and license plate light.
lTo turn on the tail lights, parking and front side
marker lights and license plate light again after
they are automatically shut off, turn the lightingswitch to “OFF” once and to “HEAD” again,
or turn the ignition switch to “ACC” or “ON”,
and the automatic shut-OFF will be cancelled
and the current will flow from the light automaticshut-OFF unit to the coil side of the tail light
relay to close the contact point. Thus, the taillight relay will be turned “ON” to turn on the
tail lights, parking and front marker lights and
license plate light.
NOTE
When the lighting switch is at the “HEAD” position,
the light automatic shut-OFF system will be also
activated for the headlights. (Refer to P.54-37.) The
same system will also be activated for the illumina-
tion lights, etc.
TROUBLESHOOTING HINTS1. All lights don’t illuminate.
(1) The headlights don’t illuminate, either.l Check the fusible link (3).
(2) The headlights illuminate.l Check the tail light relay. (Refer to
P.54-108.)l Check the dedicated fuse (2).
l Check the lighting switch. (Refer to
P.54-113.)l Check the light automatic shut-OFF
unit. (Refer to
P.54-108.)2. Some light does not come on.
l Check the bulb.
l Check the grounding circuit.
3. Some light is not automatically shut off.
lCheck the driver’s side door switch.
(Refer to GROUP 42- Door Assembly.)l Check the automatic shut-OFF unit.
(Refer to
P.54-108.)
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