fuel MITSUBISHI 3000GT 1991 Workshop Manual

FUEL SYSTEM - Troubleshootina13-23
i-
,
L
L
ENGINE
CONTROL
RELAY3
B-06
1
E&l?.a3
.L
-------__-------.107
2a
B-36
-
1c-79
1
Ia1,IjELF-DIAGNOSIS X/i;&ONjrHECKCONNECTORADJUSTMENT
EET pj&JgqCo;cToRPOWER STEERIK?g;iT;;ESSURE
----.113
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10
_-- --111s
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1
-4A/T CNTROL
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7f59
I
59
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104.--------IC
CL
CL
A-18
[
; ENGINEj ;#yTROL
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1 TSB Revision
-

13-24FUEL SYSTEM - ‘Troubleshootinn

FUSIBLE LINK@BATTERY%
--T-- -J/Bqa1
B;&CATED
;ER
0
1
15A
c-71
I-
jLEl3za
12345675 s *01112* , 1616
w
15A
I t
IOA
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C-83 m 7
pTEiEsq&is
1
6
Efi;;l
p!i!Ezq;
3 A-67
I
71,-----
AIRmFLOWSENSOR' i?
EN:
- ,lOI\
---------
OFF-*ON__O/ \I
1
cte"4 "5"0%
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CLYYIJ
EN
33
-I
ENGINE
CONTROL
RELAY
c-44
\,
3"7
T!c
4:?3[II
1-;125 +2a 108 &1852-5
X35-AC-R0503-NY
EaaTSB Revision

FUEL SYSTEM - Troubleshootinn13-25
ENGINE
CONTROL
RELAYIGNISWITIN(IGl)
1234
liEI5676
7 C-82
I
J/B
: c-71
-1
5 D-44
i
4
E
A 1
:
2-2k
Ns
I
FUEL
PUMP
RESISTORA-51
@%J
E1
i
;
J
A.LIi
,
\I
I
1-
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J
!I2rm
c-303
n
D-04591
COMBINATION
EEKPUMPCONNECTOR
L
D-03
c
c
3
dWI:DSE!;OR--
1 C-14>
3[ml
3
j.
36
5 F-14L.
c
c
II
d
ti
1 TSB Revision

13-26FUEL SYSTEM - Troubleshooting
AIR
FLOW
SENSOR
B-29
LB-eI~@.@JER’ C+- AIRIFLOW
SENSOR
\/ v\/\/ \/ \I \,“7
“5“6 “1 “2 “4 “3
%
7:
00-3>t
Ac- z-rtis
t
CL 0
I I I
iIIIIIIII
III1I
~ZL---&i ____ -&L--- ____ --------&----&9
4&&d vv
CRANK ANGLEAND TOP DEAD z-7CENTER SENSOR mm
2E?7IN21 )= 4:EGGI ’CL g
) 1G
I !’ I
B’ L--l‘;rII
ENGINEIII
CONTROL RELAY
5vii
KX35-AC-RO5tX36-NYTSB Revision

FUEL SYSTEM - Troubleshootina
ENGINECONTROLRELAY
RES
Q0.65R1.25R4,1n RKD1I T1
STOR
e.&I
IDLE SPEED /\2CONTROL,.
SERVO
B-35
YY Y YY Y
TOR
mI
III4IIIIIIIL---wI IA-67 ,,2-,,8--,,1-,,?_--,,lOI II I
r----1I II I5
c;IImn‘3
A-Z
&I
-
:1lI-II
OXYGENS;K;R(RH)TEMPERATURETSB Revision

13-28FUEL SYSTEM - Troubleshooting
J/B
(MULTI-PURPOSEFUSE@>TAIL LIGHTRELAYDEF(RELfjGERKixCONTR
m
ONC-69'(3I
if2-
L&ia3
dd
I0_-w1DIODE II
3
d
STOP
LIGHT
SW ITCHC-6112
El34c-29
1r--------'
fII
--__---_-__------___------~~--- \1,--Iy----------------------------Jd
71
z?124 t&r-----------------------------7;I IIV
I---
w
Sk
w,t
>
JI
v
----_10
.----
5
cb-----
3
-.---
!xI
%
:------_22
6-------
J
1
&I
8 A-33
11
.----
3
- -----------
r
103
c
I
128 c-14
pER!Eq?
v
.-----_-_-----_
AIR
E;;F#ONER
UNITACTIVEisiii%!iTc
ABS
CONTROLUNIT
Y
POWER TRANSISTOR
FlffiWRELAYKX35-AC-R0503B-NY
TSB Revision
I

FUEL SYSTEM - Troubleshooting13-29
ENGINE
CONTROL
RELAYF
1 7=2
c----IIIIIIII2,(2Io FUEL
) SE
PRESSURE
SOLENOID
VALVE
IfII
I
I
I
I
J
]i#&B,D i
A-20
1
WASTE
GATE
SOLENOIDVALVE
/
7 EGRi ~XE~~OID
I
; A-21
L
1 A-70
j A-72
f ENGINEj jXICI$ROL
I
-------13s
3.------
s
10
/\1
>
J
c
”-_-
1 A-18
3P
~;~E&DIAGNOSIS #Fjhl;;ON
CONNECTORADJUSTMENT
EFfq&@gCONNECTOR
d
Efpggggg]
I B-OS
ENGINE
COOLANT
Q&;EEATURE ,,'I/\FOR AIR)/@ICONDITIONEROFF --xOlJ
POWER STEERING;tK;BESSURETSB Revision

13-30FUEL SYSTEM - Troubleshooting
FUEL TANK AND FUEL LINEMlJE4AB
Symptom
Engine malfunctions
due to insufficientfuel supply
Evaporative emission
30ntroI systemmalfunctions
(When tank cap is
removed, pressure
releasing noise is
heard)
tank and fuel line
1 TSB Revision

SERVICE ADJUSTMENT PROCEDURES
MlBFHSU
BASIC IDLE SPEED ADJUSTMENT
NOTE(1) The basic idle speed has been factory-adjusted with the
speed adjusting screw (SAS) and does not normally require
adjustment.(2) If the adjustment is required, first check that the ignition
plug, injector,
ISC servo, and compression pressure are
normal.
(1) Before starting the inspection and adjustment procedures,set the vehicle in the following conditions:
l
Engine coolant temperature: 80 to 95°C (176 to 205°F)l Lights, electric cooling fan, accessories: OFF
lTransaxle: Neutral (P range on vehicles with automatic
transaxle)l Steering wheel: Straightforward position
(2) When using the multi-use tester, connect it to the diagnosis
connector.
NOTEThe connection of the multi-use tester grounds the
self-
diagnosis/data transmission selector terminal.
(3) When not using the multi-use tester, proceed as follows:
@) Insert a paper clip into the l-pin blue connector as
shown in the illustration. FUEL SYSTEM
- Service Adjustment Procedurks13-31
i
@ Connect a primary-voltage-detecting tachometer to the
paper clip.
NOTEThe
tacho/neter should read l/3 of the actual engine
speed. This means that the actual engine speed is thetachometer reading multiplied by 3.
TSB Revision

13-32FUEL SYSTEM - Service Adjustment Procedures
@ Using a jumper wire, ground the self-diagnosis/data
transmission selector terminal (terminal
@) of theI
diagnosis connector (white).
dSelf-diagnosis/
ydata transmission
(4) Remove the waterproof female connector from the ignition
timing adjusting connector (brawn).(5) Using a jumper wire, ground the ignition timing adjusting
terminal.(6) Start the engine and run at idle.
(7) Check the basic idle speed.
When using the multi-use tester, select item No. 38 and
read the idle speed.
Basic idle
speeci: 700 + 50 rpm
NOTE(I) The engine speed may be low by 20 to 100 rpm while
the vehicle is new [distance driven approx. 500 km (300miles) or less], but no adjustment is necessary.
(2) If the engine stalls or speed is low despite a sufficient
distance driven [approx. 500 km (300 miles) or more], it
is probably due to deposits on the throttle valve. In thiscase, clean the throttle valve. (Refer to
P.13-33.)(8) If the basic idle speed is out of specification, adjust by
turning the speed adjusting screw (SAS).
NOTE
If the idle speed is higher than the standard value even with
SAS fully tightened, check to see if there is evidence of theidle switch (fixed SAS) being moved. If the idle switch
seems to have been moved, adjust it. If it does not seem tohave been moved, there may be a leak caused by
deteriorated fast idle air valve (FIAV). In such a case, replacethe throttle body.
(9) Turn the ignition switch OFF.
(lO)When the multi-use tester has not been used, remove thejumper wire from the self-diagnosis/data transmission
selector terminal.
(11)Remove the jumper wire from. the ignition timing adjustingterminal and replace the connector back again.
(12)Start the engine again and run at idle for
10 minutes to
make sure that the engine runs at proper idle speed.
‘dTSB Revision