1989 MITSUBISHI GALANT Service Repair Manual

FUEL SYSTEM VALVE> - TroubleShooting13-19
PROBLEM SYMPTOMS TABLE (FOR YOURINFORMATION)
:tShock
Surge
Knocking
0,GRun ona (“dieselrng”)
6
Items Symptom
-- -... __----. -~-
The starter IS used to crank the engine, but there IS no
combustron
wrthrn
the cylinders.
(no rnrtral combustron)
and the engine won’t start~-.-__Startrng
problem There IS combustron
wrthrn
the cylrnders.
but then the engrne
soon stalls.
(Initial combustion, then stall)
(Startrng takes a long t1me.l
I
Idling
rnstabrlrty
/ Engrne won’t start qurckly~--_~ -...
Engine speed doesn’t remain constant; changes during idling.
Usually, aludgement can be based upon the movement of the tachometer pointer, and
the
vibration transmitted to the steering wheel, shift lever, body, etc. This is call\
ed rougt
Idling.
The
engtnedoesn’t idle at the usual correct speed.
Thus non-contrnuity of rdlrng Includes the followrng elements(1) Die out
. . . . ..The
engine stalls when the foot IS taken from the accelator pedal,
regardless of whether the vehicle IS moving or not.(2)Pass out . . . ..The
engine stalls when the accelerator pedal IS depressed or while it IS berng
used.
“Hestatton” IS the delay In response of
the vehicle (engine rpm) that occurs
when the accelerator is depressed
Inorder to accelerate from the speed atwhich the vehicle is now traveling, or a
temporary drop in vehicle speed (enginerpm) during such acceleration. Hesltatron
Serious
hesstatlon IS called “sag”.
Poor
acceleration
E Stumbl
e
2
5
Time lFUO223
Poor
acceleration IS rnabilrty
to obtain an acceleration corresponding to the degree of
throttle opening, even though acceleration IS smooth, or the rnabrlrty to reach maxmum
speed.
Engrne rpm response IS delayed when .
the accelerator pedal is initrally
depressed
for acceleratron
from the stopped
condition ldllng
Stumble
Trme lFUO224
The
feeling of a comparatlvley large Impact or vrbration
when the engine IS accelerated
or decelerated.
This IS repeated surging
ahead dunng constant speed travel or dunng
vanable
speed
travel.
A sharp sound
IIke a hammer strtklng the cylinder walls during
dnvtng
and whrch
adversely affects driving.
The
condrtion In which the engrne
continues to run after the lgnltion switch 1s turned to
OFF. Also called
“dreselrng”.
TSB Revision

13-20FUEL SYSTEM - Troubleshooting
CIRCUIT DIAGRAM
cl989 models>
iERIGNITIONSWITCHbST)-
SUB F_USIBLE
.-__-____----w-w--
2-BW0
LINK@
A-08
;;IJkKPUMP
:ONNECTOR
t\I
M/Tg' A/Tz
1ch7 LCL/.MFIRELAY
r
TuT;T
Im
\
Zi/T A/r;
09108_------------
X35-AC-H0525-NY
1 TSB Revision

FUEL SYSTEM - Troubleshooting13-21
3-
2
c:
2
(:-----
2
A
o-
TION'CH(IG1)
2-BW
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IGNITIONy COIL
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8
C-23
ON: 235kPa
$i?f;7kPB
A-21
GR
r-t
631
Fij4103m-11 65
p&7iGaJ$p
TSB Revision

13-22
FUEL SYSTEM - Troubleshooting
CIRCUIT DIAGRAM (CONTINUED)
< 1989 models>
IGNITIONSWITCHlIGl)#OF?OWERMFIRELAYIGNIlTRANf
;ROLKUN1
am\lR Fl.tlW i=XNSOR
A-57
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-
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II,---
1’ 8Iis%%
Gi3mv1 a+2 pg3 $14I
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IDLE SPEEDCONTROL MOTORPOSITJON SENSOR
A-53 12El(VEHICLES FOR94CALIFORNIA)
B-02 B @
KX35-AC-HO525A-NY
B-04 m
1 TSB Revision1I

FUEL SYSTEM - Troubleshooting13-23
--
r-B-20 I
LXYG~!tEN6OR 1
’I
W!E~W~,F;~R
-2 EVAPORATIVE ! ““L;,$ m&S-ON
h SOLENOID,\,C” 1 PI FR
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1:
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2
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POWERPRESSU
' OXYGEN SENSOR'(VEHICLES FOR
FEDE;zd
C-18 FRONT SIDE
DATA LINKCONNECTOR
4
IENG)
(DATA)
c-40
plqismq
C-38
7
F
J/B
cp4
", H
I e
Ell94
TSB RevisionI

13-24FUEL SYSTEM VALVE> - Troubleshooting
CIRCUIT DIAGRAM
< 1990 models>
TERIGNITIONSWITCH(ST)
$s
-3 C-24cl
-i
__---____-_-_------ ____--___-_---------4,_--- -_---- -C-08
.-----
SUB FUSIBLE
cu3
'4
A-41
3
cp2-BW0
PARK/3"NEUTRAL "pI"O~~~~ONcugp8
P
A-43$99
s
CL
;;EbKPUMP
:ONNECTOR
m
L-b1=1 L M/T, ;+.y3
I1 !
:!r
MFIRELAY
c-35
T A/T-T
t5
5 9-’ccFdII .A
kc
r-l
%1
zs
RR.s G;. v
!m:X35-AC-H0526-NY
1 TSB Revision

FUEL SYSTEM - Troubleshooting13-25
g
30
c
30
i----

-
30
c!
a-

-
TIONCH(IG3)!MF"HfSOR
-Ic-30
C-36
2-BW
7FEE'ACATED
-
-
7
8
“6
1
IGNITIONCOIL
B-07
Ii3
2
>F<7 B-061ISTRIBUTOR
%3m
A_ IGNITION
f!$$ISTOR
- l-i%35l
.--13
i4
t
~;m&NATlON
C-52
E-23-j
l-ON: 235kPa
#$lkPa
A-21ON:210OkPa(299PS I)OFF:270OkPa(384PS 1)
hL2‘
1
I
cos1
:I
DUALIIF:.Wyg;RE
OFFI
i
GRmc;gm -
:OMPRESSOR8\2
iTI“1"234
8 2
;- al
7,\- _____ --A+-----
,?3 B-05
I 2
3
ilIp=
g#g~$‘C Y
b
;4 _____ -- ----103 gg0111 65
4
ml

,
“r4
r4 -LTERY BACK UPI- r
TSB RevisionI

13-26
FUEL SYSTEM - Troubleshooting
CIRCUIT DIAGRAM (CONTINUED)
(1990 models>
IGNITIONRYSWITCH(IG37
1
4YIGNITION POWERTRANSISTOR
?-
::.?
a,
::
VOLUME AIR FLOW GENSOR
A~rnICnmtit AIRVlEw!A-47 aweal?YPEPAnsleLIP PLOTsetlsmm
\I\/ \, \I “3“5“4 “6 “1
3Fs3d
LI
A-57
.sGi2
MPI
KrTRoL~,1_6_--AL,'10‘I IJO2 g5jj 21----22 &a
”A vVVV
L GND “t?V-
&ario-6
m
4 f 74 I k@J@ ________ -r
i-J101 ~~--~~~-~~~-~--~~-~~~-~20 7-g----- :
r
gt&g
B-02
/-J ,jm’ CALIFORNJ
B-04 m
TSB Revision