Timing MITSUBISHI 3000GT 1996 2.G User Guide

Downloaded from www.Manualslib.com manuals search engine CIRCUIT DIAGRAMS - MFI Circuit
155 ,
MFIRELAY
7TRP
L-h
3ULE
EGR
SOLENOID
VALVE
(A-21)
I
-
8
2
!
1
LG-RBR-I
6
I
EVAPORATIVE;flMIgEION
SOLENOID
20W-lW-I.
46 (c-53)
ENGINE
CONTROL
MODULE
10
1
56
:ONNECT
ELC-4A/T
1 (P) F
(F>L-h
(B-06)
(F>L-W
2B-G
C
(c-79) FRONT SIDE (c-92)
IGNITION
TIMING
ADJUSTMENT
CONNECTOR
(c-52)(c-53)
HR05MOSDB
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MFIRELAY
(F:r---’
IIIIII/IIII-----
(F>L-
G-
(A-67)
G-
7
2
_-----------___3
(F>LG-1
40E
/2(
I
g9g;fiTI~~/\
PURGESOLENOID
j(A-20)1
EGR
SOLENOID
_____-___-______ _______~______14
i
(F)LG-R(F)R-'
9_____-____-__---6
PV :
1
I
TURBOCHARGER
WASTE GATE
SOLENOID
32 (c-53)
o+
I(F)L-'h
9(B-06)
(F)L-W
,,2
,,l
POWER
STEERING
g;y?;;ER
P
AI _-----,cc-29)“41FULL AUTO
2BB BP R-B (Y)
4n5 1167mA A A]
DATA LINK CONNECTOR
A/C
IGNITIONTIMING
ADJUSTMENT
CONNECTOR
ENGINE
CONTROL
MODULE
l(A-18)
1
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Downloaded from www.Manualslib.com manuals search engine CIRCUIT DIAGRAMS - MFI Circuit
COMPONENT LOCATIONUp to 1993 models and 1994, 1995 models Non Turbo (Federal)
NameSymbol
Air conditioning relay0
Air conditioning switch
Camshaft position sensor
a
Check engine/malfunction indicator lampP
Crankshaft position sensorD
Data link connectorR
EGR solenoid Z
EGR temperature sensor

Engine control module
Engine coolant temperature sensor
Evaporative emission purge solenoid
Fuel pressure solenoid

Heated oxygen sensorE
idle air control motor (stepper motor)L
Name/ Symbol
Ignition coil (ignition power transistor)
Ignition timing adjusting terminal
Injector
(1
Multrport fuel rnjectron (MFI) relay
ParWNeutral position switch c&T>
Power steering pressure switchH
Resistor W
Throttle position sensor (With built-in closed throttleCposition switch)
Turbocharger waste gate solenoid U
Variable induction control motor (DC motor) (withJbuilt-in induction control valve position sensor)

Vehicle speed sensorFIVolume air flow sensor (with built-in intake air A
temperature sensor and barometric pressure sensor)
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Downloaded from www.Manualslib.com manuals search engine 16-1
id
ENGINE
ELECTRICALCONTENTS
i;
CHARGING SYSTEM . . . . . . . . . . . . . . .2
GENERATOR. . . . ..*.............-.......12
ON-VEHICLE SERVICE.....................
6
Generator Output Line Voltage Drop Test.......6
Output Current Test..........................7
Regulated Voltage Test.......................9
Wave-form Check Using An Analyzer.........10
SPECIFICATIONS.........................2
General Specifications........................2
Service Specifications........................2
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . .3
IGNITION SYSTEM . . . . . . . . . . . . . . . .31
IGNITION SYSTEM . . . . . . . . . . . . . . . . . . . . . . .45
ON-VEHICLE SERVICE . . . . . . . . . . . . . . . . . . . .36
Camshaft Position Sensor
Check. . . . . . . . . .Refer to GROUP 13A
(ON-VEHICLE INSPECTION
OF
MFI COMPONENTS)Crankshaft Position Sensor
Check. . _ . . . . . . .Refer to GROUP 13A
(ON-VEHICLE INSPECTION
OF MFI COMPONENTS)
Ignition Primary Voltage Wave-form
Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
Ignition Secondary Voltage Wave-form
Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .._.37
Ignition Timing Adjustment . . . Refer to GROUP 11
Spark Plug Cable Test . . . . . . . . . . . . . . . . . . . . .36
Spark Plug Test . . . . . . . . . . . . . . . . . . . . . . . . . . .36
SPECIAL TOOLS . . . . . . . . . . . . . . . . . . . . . . . . .31
SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . .31
General Specifications . . . . . . . . . . . . . . . . . . . *. .31
Service Specifications . . . . . . . . . . . . . . . . . . . . . .31
TROUBLESHOOTING.....................32STARTING SYSTEM...............
19
SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . .19~
General Specifications . . . . . . . . . . . . . . . . . . . . . .19
Service Specifications . . . . . . . . . . . . . . . . . . . . . .19
STARTER MOTOR . . . . . . . . . . . . . . . . . . . . . . . 23~
TROUBLESHOOTING . . . . . .-a.. . . . . . . . . . . . .20
L
I
I

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,
( TSB Revision1
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 - Ignition System16-39
Wave-form Observation PointsPoint A: The height, length and
slope~of the spark line (refer to abnormal wave-form examples 1, 2, 3
and 4) show the following ‘trends.’\
Spark linePlug gapCondition of Compression Concentration
electrode
forceIgnition timing Sparkof air mixture
plug cable
LengthLongSmallNormal.
LowRichAdvancedLeak
ShortLarge
Large wear
HighLeanRetardedHigh
resistance
Height
HighLargeLarge wearHighLeanRetardedHigh
resistance
LowSmallNormal
Low
Rich _AdvancedLeak
SlopeLargePlug is fouled
-
Point B: Number of vibrations in reduction vibration section (Refer to abnormal wave-form example 5)
Point C: Number of vibrations at beginning of dwell section (Refer to abnormal wave-form example 5)
Point D: Ignition voltage height (distribution per each cylinder) shows the following trends.
Ignition
voltagePlug gapCondition of CompressionConcentration
electrodeIgnition timing Spark
forceof air mixtureplugcable
HighLarge
Large wearHighLean
RetardedHigh
resistance
LowSmallNormal
LowRich
AdvancedLeak
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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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