Ignition MITSUBISHI 3000GT 1994 2.G Workshop Manual

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FUSIBLE LINK@
zJ==%~,
IGNITION
2B-k
iWITCH
B-L
B-l
2
B-j
4
2B-k1
(c-31:
2B-kJ/Br
rwER
(A-OSXII-
----------SrOFFON
2
G-B
(c-02
3
G-E
PEDAL&~#,;~ONB
28-k
IOD ORSTORAGE
CONNECTOR0.85B-Y
R-B
1 I------. BUZZER. MFI SYSTEM.DOME#T,. fl@+NG
LIGHT
AND IGNITION KEY
CYLINDER
ILLUMINATION LIGHT
2G-3130.85R-B
1E;$gAb;GHT AND
EW';RTMENT
i
R-B2B-Y
3B-F
20B-R
WHEN
KEY IS
REMOVED (B-23:
r-
'TE
!
LG-B
21Q
MOTOR
B-l
B-L-
*;~F$K& DOOR
.ACTWE AEROB-l
4EHE;iALARM
(c-65)
r
d
6
I
ms
(c-31)(c-56) (c-58)(c-64)
STARTER
mf3t7)(c-02)
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I
#d ~
FUSIBLE LINK@IGNITIONf
T2B-k
(c-31:
1
iWITCH (ST)
.----11 1II
I1
I
1 1
3 /3
I.----A 2
2B-Y
B-Y
4ISTARTER
RELAY
@liB
MFI SYSTEM2B-Y
--____----------------.-*OFFON
2
G-B
IOD OR
STORAGE
CONNECTOR32B~yg$!y”IsE (c-02:
O.a5R-BR-B2B-Y
eQsCIAk;GHT AND
COMPARTMENT
LIGHT
3
'BUZZERPARK/
. f~[f,\6[!?.+~~ [#~f#hI
CYLINDER
ILLUMINATION
tIGHT(B-26)
L’\2'D-'
9:2
r’”
,:1R-i
NOTEXl FROM 1993 MODEL:2 1992 MODEL
'l.25B-W
MFI SYSTEM
2B-R
BATTERY(
2B-R
208-R(B-30)
3B-R
(B-23)1(B-24)
SUPPLEMENTAL
1gEyL&E"i I NT
h
STARTER ~0~0: WHEN
KEY IS
REMOVED
B-1
B-L
$FRIW& DOOR
.ACTIVE AEROB-I
*TWF;~ALARM
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OPERATION
L
0For models equipped with the M/T, the clutch
pedal position switch contact is switched OFF
when the clutch pedal is depressed; when the
ignition switch is then switched to the “ST’ posi-tion, electricity flows to the starter relay and
the starter motor, the contact (magnetic switch)of the starter is switched ON and the starter
motor is activated.
NOTEIf the ignition switch is switched to the “ST
position without the clutch pedal being de-
pressed, electricity flows to the starter relay
(coil), the clutch pedal position switch (contacts)
and to ground, with the result that the contacts
of the starter relay are switched OFF, and, be-
cause the power to the starter motor is thereby
interrupted, the starter motor is not activated.lFor models equipped with the
AIT, when the
ignition switch is switched to the “ST’ position
while the selector lever is at the “P” or “N” posi-
tion, the contact (magnetic switch) of the starter
is switched ON and the starter motor is activated.
TROUBLESHOOTING HINTSThe starter motor does not operate at all.
l Check the starter (coil).
lCheck for poor contact at the battery terminals
and starter.l Check Park/Neutral position switch.
l Check clutch pedal position switch.
l Check starter relay.
l Check theft-alarm starter relay.
l Check key reminder switch.
i
/’
L&J
Fieldcoil wire
Iii?Stopper
IPinion gap
PinionZ6EL003
STARTER MOTORREMOVAL AND INSTALLATION
Refer to GROUP 22
- Manual Transaxle, or GROUP 23 -
Automatic Transaxle.INSPECTION
PINION GAP ADJUSTMENT(1) Disconnect field coil wire from M-terminal of magnetic
switch.
(2)Connect a 12 V battery between S-terminal and M-terminal.(3) Set switch to “ON”, and pinion will move out.
Caution
This test must be performed quickly (in less than 10
seconds) to prevent coil from burning.(4) Check pinion to stopper clearance (pinion gap) with a
feeler gauge.
Standard value: 0.5-2.0 mm (.020-,079 in.)
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- Ignition System
IGNITION SYSTEM
16-31
SPECIFICATIONSGENERAL SPECIFICATIONS
CRANK ANGLE SENSOR cup to 1992 model>
Items
Specifications
TypeContact pointless type
Identification No.
Tl T49371
Part No.MD1 53464
Advance mechanism
Firing orderControlled by engine control unitl-2-3-4-5-6
IGNITION COILrItems
Type
Identification No.SpecificationsMold 3-coil
F-536
L
IPart No.j MD152648I
SPARK PLUG
Items
NGK-Specifications
PFRGJ-11
NIPPON DENS0PK20PRPllSERVICE SPECIFICATIONS
Items
Ignition coilStandard valueLimit
Primary coil resistance at
20°C0.67-0.81(68°F)
RSecondary coil resistance at
11.3-15.3
20°C (68°F) kc2
Spark plug gap mm (in.)1.0-l .l (0.39-0.43)Spark plug cable
kQ
1.3 (.051)
Max. 22SPECIAL
TOOLS
Tool number and nameSupersessionApplication
i
MD998464
Harness connector
(4 pin, square)Check of ignition primaryvoltage
(connection of ignition coil
connector)
i
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TROUBLESHOOTING (UP TO 1993MODELS)CIRCUIT DIAGRAM
IGNITIONhiITCH(IG1)
2B-X
7m
1
J/B
c
015A
(c-71)
2B-Y
(D-44)
2B-W
(D-15)
2B-W
1.25B-W
@%t”DETECTION
CONNECTOR
5
5
(B-14)
1.25L-R,,2
41.25L-B;,l
,,1. 25L-Y;,4I
2B-W23_
y;'$1. 25L-Y
A6 ,P-----,\22-----,,ll(B-22) /\,h,\IGNITION
IGNITIONCOIL1-4COIL2-5-r--
CAPACITOR
(B-15)2B-W
1/IGNITION IPOWERTRANSISTOR!rl
2
4TION
)
(D-15)
3%(TAC
42 5
3 6
”
SPARK PLUG
1.25B
IIIIIIII1IL
“-6% “-6 “-4%4;ig;f;HERIC.IGNITIONSWITCHtST)/ 5vv.(CTP) SWITCH.CRANKSHAFT
.CAMSHAFTPOSITION SEENGINE CONTROL MODULEPOSITION SENSOR';#$;~L;oc.KNOCK SENSOR.VOLUME AIR*ENGINE COOL
FLOW SENSOR;ED&f$AT"RE
:NSOR
IULE:ANT
IGNITION TIMING
ADJUSTMENT CONNECTOR
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(UP TO 1995 MODELS)CIRCUIT DIAGRAM
IGNITION SWITCH(IG1)
B-W
1CHARGING33-W 70
J/B0
t15A
(c-71)5
2B-Y
2B-W
WEDETECTION
CONNECTOR
\I/1. c5L-R,,2
(F)1.25L-B;,lI'(F>1.25L-Y J,4
(FlPR-W : 3
CAPACITOR
(B-15)(F)2B-W
,x6 ,J3,_12=r------------------ -----,,ll (B-22)
iI -,\ I\,\,\IGNITION' ""TL 1-4IGNITION
COIL 2-5
i
IGNITION
COIL 3-6
1
(F)E_________-----------_----1532'1(8-21)(F)W
101;; (C-54)
r-,58 (c-90) A
1o23-----------ll(c-52)
I/ AAAA
SPARK"PLUG
INPUT SIGNAL
&i&AND
1. 251
!I
~~$yqppQ.INTAKE AIRgE;g;EATUREsiKz&G
'&$AT~~;HER'C
k-_""_---- 52~1. (CTP) SWITCH.CRANKSHAFT
3.CAMSHAFTPOSITION SENSOR
B-G 104g2
I
if;INE CONTROLPOSITION SENSOR*TRANSAXLE
.KNOCK SENSORCONTROL MODULE
2 (A-18)
.VOLUME AIR.ENGINE COOLANT
FLOW SENSOR$~~~~~ATURE
0
NOTEIGNITION TIMING:l:TURBO,NON TURBO (CALIFORNIA)ADJUSTMENT CONNECTORx2:NON TURBO (FEDERAL)
FE) CFm) (B-14) Em3 EFZTJ(B-22)-(c-54)(c-71)
/$J$mb @f-@
ok4 Oh,
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(FROM 1996 MODELS)CIRCUIT DIAGRAM
IGNITION SWITCH(IG1)
B-W
iCHARGINGJ/B
Eiwi"
/DETECTION
(c-73)“5CONNECTOR
2B-Y
(D-44)“5
2B-W-I
2B-W
MFILS - --
(F>B-W(B-14)
(F)l. 25L-R,,2
(F)1.25L-B;,l
(F>1.25L-Yj,4
(F>2B-W ),3-
.
13,<2------ ---__,,11 (8-22),\,\IGNITIONCOIL l-4IGNITION
COIL 2-5IGNITIONCOIL 3-6-4III(r
,cl
(F>2B-W
IGNITION /POWER
TRANSISTOR;
I
(F)'
\I\/,I--------------
-----
-----
I5(F)W321m
BR-RW
(D-15)2
W
METE1GAUGI*AND)3 6
\-I
G9SPARK PLU4
9 41INPUT SIGNAL
*INTAKE AIRg;#j#ATURE
"-b- bkl *ATMOSPHERIC9FLTcno
-SPEED SENSOR.(PNP) SWITCH.-.-..
, 4””
---- 521ENG:h!E CONTROLMODI
TENSOR
ODULE
OLANT
RE
IGNITION TIMING
ADJUSTMENT CONNECTOR
1. 25
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- Ignition System16-35
OPERATIONl
Turn ignition switch to .“ON”position, and batteryvoltage will be applied to primary winding of
ignition coil.l
When crankshaft position sensor and camshaft
position sensor signal is input to engine control
module, engine control module makes ON-OFF
control of power transistors one by one.l When power transistor is turned on, current
flows from ignition coil (primary winding) to
ground through power transistor.l When power transistor A is turned from ON
to OFF, the spark plugs of No. 1 and No. 4
cylinders spark. Turning of power transistor B
from ON to OFF will produce sparking in spark
plugs of No. 2 and No. 5 cylinders. Furthermore,
when power transistor C is turned from ON toOFF, sparking is produced in spark plugs of
No. 3 and No. 6 cylinders.
TROUBLESHOOTING HINTS1. Engine cranks, but does not start.
(1) Spark is insufficient or does not occur at
all (on spark plug).l Check ignition coil.
l Check camshaft position sensor and
crankshaft position sensorl Check power transistor.
l Check spark plugs.
l Check spark plug cable.
(2) Spark is good.
l Check ignition timing.
2. Engine idles roughly or stalls.
l Check spark plugs.
l Check ignition timing.
l Check ignition coil.
l Check spark plug cable.
3. Poor acceleration
l Check ignition timing.
l Check spark plug cable.
l Check ignition coil.
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Defective insulation
Defective insulation’
GoodZiELO34
ON-VEHICLE SERVICESPARK PLUG CABLE TEST
,d
(1) Disconnect, one at a time, each of the spark plug cables
while the engine is idling to check whether the engine’s
running performance changes or not.
Caution
Wear rubber gloves while doing so.(2) If the engine performance does not change, check the
resistance of the spark plug cable, and check the spark
plug itself.SPARK PLUG TEST
(1) Remove the spark plug and connect to the spark plug
cable.
(2) Ground the spark plug outer electrode (body), and crank
the engine.Check to be sure that there is an electrical discharge
between the electrodes at this time.
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LiENGINE ELECTRICAL
- lanition Svstem16-37
--7EL0134IGNITION SECONDARY VOLTAGE WAVE-FORM
CHECK
MEASUREMENT METHOD
(1) Clamp SECONDARY PICKUP around spark plug cable.
NOTE
1.The ignition voltage peak appears reversely betweenwhen the spark plug cables of the cylinders
No.4,
No. 5 and No. 6 are clamped and when those of thecylinders No. 1, No. 2 and No. 3 are clamped.
2. Since the
2-cylinder simultaneous ignition system is
employed, the wave-form for two cylinder appears
group by group when the wave-form is observed.
(Cylinder No. 1- cylinder No. 4, cylinder No. 2 -cylinder No. 5 and cylinder No. 3
- cylinder No. 6
as the respective groups) Here, the wave-form is
observed for the cylinder whose spark plug cable is
clamped with the secondary pickup.(2) Clamp the spark plug cable with the trigger pickup.
NOTE
1. Clamp the spark plug cable of the cylinders No.1,
No. 2 or No. 3 which belongs to the same group of
the cylinders clamped with the secondary pickup.2. Though it is difficult to isolate the cylinder of the
wave-form, the wave-form of the cylinders clampedwith the secondary pickup is stable. Use this as a
reference for isolation.
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