1995 MITSUBISHI 3000GT ignition coil

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.
TSB Revision

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.)
1 TSB Revision

Downloaded from www.Manualslib.com manuals search engine 54-164CHASSIS ELECTRICAL - Radio and Tape Player
A-6There is noise when starting the engine.
Noise type
Sounds are in pa-
rentheses ( ).
AM, FM:
Ignition noise
(Popping, Snap-
ping,Cracking,
Buzzing)
Otherelectrical
components
Static electricity
(Cracking, Crin-
kling)
Conditions
0Increasing the engine speedcausing the popping sound tospeed up, and volume de-creases.0Disappears when the ignitionswitch is turned to ACC.
-
lDisappears when the vehicle is
completely stopped.Occurs when parts or wir-
Severe when the clutch is en-ing move for some reasonlgaged.and contact metal parts of
the body.
lVarious noises are produced de-pending on the body part of thevehicle.
Due to detachment from
the body of the front hood,
bumpers, exhaust pipe
and muffler, suspension,
etc.
Causel
Mainly due to the
spark plugs.l Due to the enginenoise.
Noise may appear as
electrical components be-
come older.
Parts to be Location of
inspectedparts
or remedy(next page)
Noise con- 1
denser
Ground
cable2, 3
Repair or replace electricalcomponents.
Return parts or wiring to
their proper position.
Caution
1.Connecting a high tension cable to the noise
filter may destroy the noise filter and shouldnever be done.
2.Check that there is no external noise. Since
failure to do this may result in misdiagnosis
due to inability to identify the noise source,
this operation must be performed.3. Noise prevention should be performed by
suppressing strong sources of noise step
by step.
NOTE
1. Condenser
The condenser does not pass D.C. current, butas the number of waves increases when it
passes A.C. current, impedance (resistanceagainst A.C.) decreases, and current flow is
facilitated. A noise suppressing condenser
which takes advantage of this property is in-
serted between the power line for the noise
source and the ground. This suppresses noiseby grounding the noise component (A.C. or
pulse signal) to the body of the vehicle.
2. Coil
The coil passes D.C. current, but impedance
rises as the number of waves increases relativeto the A.C. current. A noise suppressing coil
which takes advantage of this property is in-
serted into the power line for the noise source,
and works by preventing the noise componentfrom flowing or radiating out of the line.
1 TSB Revision
Ground parts by bonding.
Cases where the problem
is not eliminated by a single
response to one area are
common, due to several
bodypartsbeing
imperfectly grounded.

Downloaded from www.Manualslib.com manuals search engine ALPHABETICAL INDEX3FUNCTION, Check (4WS) .
. . . . . . . . . . . .37B-5-l
GARNISHES . . . . . . . . .
GENERATOR . .
GLASSCenter Pillar .
Door.....................
Door Window, Adjustment
Liftgate . .Quarter Window.Window. . . . . . . . . . . . . . . .G SENSOR.. . . . . .
. . .
G
.........................51-15-l........................16-12-11
.....................42-33-l.....................42-43-l......42-12-l......42-38-l......42-34-l......42-26-l....338-l 8-l.....35-117-l
H
HAZARD SWITCH..................................54-110-11
HEADLIGHT........................................54-103-11
HEADLINING.......................................52A-16-l
HEATED OXYGEN SENSOROn-vehicle Inspection.........................13A-137,247-l
HEATER..............................................55-3-l
HEATER CONTROL...................................55-30-I
HEATER UNIT........................................55-34-l
HIGH MOUNTED STOP LIGHT.......................54-107-11
HOOD...............................................42-18-lAdjustment.........................................42-11 -I
HORN.............................................54-115-11RELAY..
..........................................54-118-11
SWITCH..........................................54-118-11
HYDRAULIC UNIT CABS>.............................35-110-I
Check
.............................................35-76-lI
IDLE AIR CONTROL MOTOR (Stepper Motor Type)
On-vehicle Inspection.........................13A-153,263-l
IDLE MIXTURE, Check................................11-12-l
IDLE SPEED
Basic, Adjustment.................................13A-55-lCurb,Check........................................11-11-l
IGNITION
CABLES, Maintenance................................00-46-l
COIL, On-vehicle Inspection....................
13A-158,264-l
POWER TRANSISTOR, On-vehicle Inspection....13&158,264-l
SWITCH............................................54-6-11
SWITCH-IG, On-vehicle Inspection...............13A-65, 193-l
SWITCH-ST, On-vehicle Inspection
......................................13A-113,230-l
......................................13A-112,229-l
SYSTEM...........................................16-45-11
TIMING,‘Check.......................................11-9-l
IMPACT SENSORS, Front............................528-68-I
INDUCTION CONTROL VALVE POSITION SENSOROn-vehicle Inspection.........................13A-133,242-l
INJECTOR........................................13A-286-l
On-vehicle Inspection.........................
13A-144,257-l
INSTRUMENT PANEL.................................52A-5-lINTAKE
AIR TEMPERATURE SENSOR........................17-65-l
On-vehicle Inspection..........................13A-88,215-l
CHARGE PRESSURE CONTROL SYSTEM, Check.......15-7-l
INTAKE MANIFOLD...................................15-17-l
PLENUM
.......................................15-l 3-l
. . . . . . . . . . . . 15-l 5-l
K
KEY INTERLOCK MECHANISM....KEYLESS ENTRY SYSTEM........KICKDOWN SERVO...............KNOCK SENSOR.................On-vehicle Inspection............KNUCKLE........................
.................23-51-l.................42-52-l.................23-47-l..............13A-289-l..........
13A-125,237-l..................26-6-l
L
LASH ADJUSTERSCheck.............................................11-15-lReplacement.......................................11-l 7-l
LATCH, Door.........................................42-47-lLEFT MEMBER........................................32-8-l
LEVER, Shift............................................22-16-l
cFWD>.............................................22-8-lLICENSE PLATE LIGHT.............................54-106-11
LIFTGATE............................................42-20-I
Adjustment.........................................42-11-l
GLASS.............................................42-38-lLIGHT
Indicator, ECS....................................338-19-IFog.............................................54-105-11Front Combination.................................54-106-11High Mounted Stop................................54-107-11License Plate.....................................54-106-11
Rear Combination.................................54-106-11Switch, Stop......................................33B-19-l
LIGHTING SYSTEM..................................54-35-11LIMITED SLIP DIFFERENTIALCheck cAWD>......................................27-l 5-l
Rear Axle, Oil Change, Maintenance...................00-52-I
CASE .......................................27-40-I
LOOSE PANEL.......................................42-25-l
LOWER ARM
Front Suspension.................................33A-10-I
Rear Suspension...........................................( 34-29-l
............................................34-9-l
M
MAIN MUFFLER
. . . . . . .. . . . . . . . . . . .
MANUAL AIR CONDITIONING .
MANUAL TRANSAXLE . . . . . . . . . . . .
cFWD> . . . . . . . . . . . .Maintenance. . . . .
MASTER CYLINDER . . .
Clutch . . . . . . . .
MIRROR, Door..
_. .MIXTURE CONTROL (MFI) SystemMOTOR ANTENNA.. . . .
MOTOR RELAY
CABS>, Check .MOULDINGS . . . . . . . . . . . . .MUFFLER, Main
.....................
.......
...............................................................
. . . . . . . . . . . . . :. . . . . . . .._.._............._._._.MUFFLER MODE CHANGEOVER SWITCHOn-vehicle Inspection . . . . . . . . _. . . . .
..........15-30-I..........
15-33-l...........55-6-l..........
22-13-l...........22-2-l..........00-48-I..........35-87-l..........21-14-l..........51-31-l..........17-70-I........54-188-11..........35-83-l..........51-15-l...........
15-30-I..........15-33-l...
13A-131,241-l