1991 MITSUBISHI 3000GT relay

13-24FUEL SYSTEM - ‘Troubleshootinn

FUSIBLE LINK@BATTERY%
--T-- -J/Bqa1
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;ER
0
1
15A
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33
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ENGINE
CONTROL
RELAY
c-44
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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
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FUEL
PUMP
RESISTORA-51
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EEKPUMPCONNECTOR
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c
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1 C-14>
3[ml
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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:
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Ac- z-rtis
t
CL 0
I I I
iIIIIIIII
III1I
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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
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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
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fII
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71
z?124 t&r-----------------------------7;I IIV
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5
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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

FUEL SYSTEM - On-vehicle Inspection of MPI Components13-41
POWER SUPPLY AND IGNITION SWITCH-IG
Engine control
unit
16FO29:
Q-i=++=
iA MPI control relay
ml3Yuu
lcmition switch (IG)
@ Harness sideccmnector
62
I
Engine control unit
Engine control unit connector7FUO950
OPERATIONl
While the ignition switch is on, battery power is supplied to the engine control unit, the injector, the airflow sensor, etc.
lWhen the ignition switch is turned on, the battery voltage is applied from the ignition switch to the engine
control unit, which then turns ON the power transistor to energize the control relay coil. This turns ON thecontrol relay switch and the power is supplied from the battery to the engine control unit through the
control relay switch.
INSPECTION
Using Multi-use Tester
IFunctionItem No.Data displayICheck conditionIStandard valueI
Data reading16Engine control unit
power voltageIgnition switch: ONsv
TSB Revision

IS-42FUEL SYSTEM - On-vehicle Inspection of MPI Components
HARNESS INSPECTION
Measure the ignition switch terminalinput voltage.l
Engine control unit connector:
Disconnectedl Ignition switch: ON
01
orOlLO427Voltage
(V)svRepair the
harness.
(Ignitionswitch -@I
Measure the power supply voltage ofthe control relay.l Connector: Disconnected
Voltage
(V)sv
Repair the
harness.
(Battery -
@IIN
ontrolrelay connector: Discon-
Engine controlunit harnessCheck for an open-circuit, or a short-
side connectorcircuit to ground between the enginecontrol unit and the control relay.l
Control relay connector: Discon-l
Engine control unit connector:
Disconnected
1 TSB RevisionI