Coil MITSUBISHI 3000GT 1993 2.G Owner's Manual

Downloaded from www.Manualslib.com manuals search engine ENGINE ELECTRICAL - Starting System16-25
L
Field coil wire27EL0021216Fo264
00002526
MAGNETIC SWITCH RETURN TEST(1) Disconnect field coil wire from M-terminal of magnetic
switch.(2) Connect a 12 V battery between M-terminal and body.
Caution
This test must be performed quickly (in less than 10
seconds) to prevent coil from burning.(3) Pull pinion out and release. If pinion quickly returns to
its original position, everything is in order. If it doesn’t,
replace magnetic switch.
Caution
When pulling out the pinion, be careful not to have
your finger pinched.
STARTER RELAY(1) Remove the starter relay from the relay box.
(2)Connect battery to terminal 2 and check continuity between
terminals with terminal 4 grounded.
Power is supplied3-4 terminals
3-5 terminalsNo continuity
Continuity
/ 3-4 terminals / Continuity 1
Power is not
supplied3-5 terminals
l-2 terminalsNo continuity
Continuity
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Downloaded from www.Manualslib.com manuals search engine 16-28ENGINE ELECTRICAL - Starting System
Stop ringZ6EL0097
Z6ELOO96+B,SNAP
RING / STOP RING REMOVAL
(1) Press the stop ring, by using an appropriate socket,wrench, to the snap ring side.
(2)After removing the snap ring (by using snap-ring pliers),
remove the stop ring and the overrunning clutch.STARTER MOTOR PARTS CLEANING
1.Do not immerse parts in cleaning solvent. Immersing the
yoke and field coil assembly and/or armature will damage
insulation. Wipe these parts with a cloth only.
2.Do not immerse drive unit in cleaning solvent. Overrunning
clutch is pre-lubricated at the factory and solvent will wash
lubrication from clutch.3. The drive unit may be cleaned with a brush moistened
with cleaning solvent and wiped dry with a cloth.
REASSEMBLY SERVICE POINT
,A+TOP RING / SNAP RING INSTALLATION
Using a suitable pulling tool, pull overrunning clutch stop
ring over snap ring.INSPECTION
COMMUTATOR INSPECTION
(1) Place the armature on a pair of V-blocks, and check thedeflection by using a dial gauge.
Standard value: 0.05 mm (JO20 in.)
Limit: 0.1 mm
(.004 in.)
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Downloaded from www.Manualslib.com manuals search engine 16-30ENGINE ELECTRICAL - Starting System
Eq
C-- Wear limit line
-
New brush
Soldered
(Make sure that
there is no
excess solder on
brush surface)
Surface
Amarked
Zl EL049
GrowlerBRUSHES AND SPRINGS REPLACEMENT
1.Brushes that are worn beyond wear limit line, or oil-soaked,
should be replaced.do
2.When replacing field coil brushes, crush worn brush with
pliers, being careful not to damage pigtail.
3.
4.Sand pigtail end with sandpaper to ensure good soldering.
Insert pigtail into hole provided in new brush and solder
it.Make sure that pigtail and excess solder do not come
out onto brush surface.
5.When replacing ground brush, slide the brush from brush
holder by prying retaining spring back.ARMATURE TEST
ARMATURE SHORT-CIRCUIT TEST
1. Place armature in a growler.
2.Hold a thin steel blade parallel and just above while rotating
armature slowly in growler. A shorted armature will causeblade to vibrate and be attracted to the core. Replace
shorted armature.
ARMATURE GROUNDING TESTCheck the insulation between the armature coil cores and
the commutator segments. They are normal if there is no
continuity.
ARMATURE COIL OPEN-CIRCUIT CHECK
Check for continuity between segments. The condition is nor-
mal if there is continuity.
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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)
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Downloaded from www.Manualslib.com manuals search engine ENGINE ELECTRICAL - lanition Svstem
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$AT"RE
:NSOR
IULE:ANT
IGNITION TIMING
ADJUSTMENT CONNECTOR
HR03MOOAA
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Downloaded from www.Manualslib.com manuals search engine ENGINE ELECTRICAL - Ignition Svstem
(UP TO 1995 MODELS)CIRCUIT DIAGRAM
IGNITION SWITCH(IG1)
B-W
1CHARGING33-W 70
J/B0
t15A
(c-71)5
2B-Y
2B-W
WEDETECTION
CONNECTOR
\I/1. c5L-R,,2
(F)1.25L-B;,lI'(F>1.25L-Y J,4
(FlPR-W : 3
CAPACITOR
(B-15)(F)2B-W
,x6 ,J3,_12=r------------------ -----,,ll (B-22)
iI -,\ I\,\,\IGNITION' ""TL 1-4IGNITION
COIL 2-5
i
IGNITION
COIL 3-6
1
(F)E_________-----------_----1532'1(8-21)(F)W
101;; (C-54)
r-,58 (c-90) A
1o23-----------ll(c-52)
I/ AAAA
SPARK"PLUG
INPUT SIGNAL
&i&AND
1. 251
!I
~~$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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HR03MO 1AA

Downloaded from www.Manualslib.com manuals search engine 16-34ENGINE ELECTRICAL - Ignition System
(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
HR03M02AA
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Downloaded from www.Manualslib.com manuals search engine i;ENGINE ELECTRICAL
- 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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Downloaded from www.Manualslib.com manuals search engine ENGINE ELECTRICAL - lanition Svstem16-41
/
L
i
Analyzer
GroundL
01L1008
STANDARD WAVE-FORM
Observation ConditionsIGNITION PRIMARY VOLTAGE WAVE-FORM
CHECK
MEASUREMENT METHOD
(1)Remove the ignition coil connector and connect the special
tool (harness connector: MD998464) in between.
(2) When observing the No. 1 - No. 4 cylinder group, connectthe primary pickup of the analyzer probe to the ignition
coil side connector terminal No. 2 (black clip on the special
tool).
For the No. 2 - No. 5 cylinder group, connect to terminal
No. 1 (red clip), and for the No. 3
- No. 6 cylinder group,connect to terminal No. 4 (white clip).
(3) Ground the primary pickup ground terminal.
(4) Clamp the spark plug cable with the trigger pickup.
NOTE(1) Clamp the spark plug cable of cylinder No. 1, No.
2 or No. 3 which belongs to the same group of the
cylinder to which the primary pickup is connected.
(2) The wave-form of any cylinder in the same group
is displayed on the left side of the screen.
FUNCTION
PRIMARY
PATTERN HEIGHTHIGH (or LOW)
PAVERN SELECTOR
Engine revolutionsRASTER
Curb idle speed
(V)
100
Primary Primary*ignition ignition
voltage voltage
wave-form
owave-formkr
0
Zener
voltage
(Point C)
Dwell
section
b
Spark line (Point A)
/b-4
Wave damping reduction section (Point B)
/
Time
7EL0149
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Downloaded from www.Manualslib.com manuals search engine ENGINE ELECTRICAL - Ignition System16-43
Wave-form Observation Points/
LPoint A: The height, length and slope of the spark line (refer to abnormal wave-form examples 1, 2, 3and 4) show the following trends.
Spark linePlug gapCondition of CompressionConcentra-Ignition timing High tension
electrodeforcetion of air mix-cable
tureLength Long
SmallNormalLowRichAdvanced
Leak
Short
LargeLarge wearHighLeanRetardedHigh
resistanceHeight High
LargeLarge wearHighLeanRetardedHigh
resistance
LowSmall
NormalLowRichAdvancedLeak
SlopeLargePlug is fouled-
Point B: Number of vibrations in reduction vibration section
(Refer to abnormal wave-form example 5)
Number of vibrationsCoil and condenser
I3 or higher/ Normal
Except aboveAbnormal
Point C: Height of Zener voltage
Height of Zener voltageProbable cause
HigherProblem in Zener diode
LowerAbnormal resistance in pri-
mary coil circuit
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