MITSUBISHI ECLIPSE 1991 Service Manual
ECLIPSE 1991
MITSUBISHI
MITSUBISHI
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MITSUBISHI ECLIPSE 1991 Service Manual
Trending: inflation pressure, brakes, jump cable, check engine light, spark plugs, wheel size, fog light
Page 461 of 1216
FUEL SYSTEM - Troubleshooting14-7
Symptom
Engine will not startor start too hard(Cranks OK)
Rough idle or engine
stumbles
Trouble in the MPI systemCheck for output of self-diagnosis
code.Read the code with a voltmeter.Malfunction
of the fuel pump drive control systemCheck the fuel pump drive controlsystem
and the fuel pump.Malfunction
of the ignition timing control systemMalfunction
of the power transistor
Check the ignition timing.
Check the power transistor as a single
unit.
Power is not supplied to the engine control unit.Check the power supply circuit.Malfunction
of the control relayMalfunction
of the injector
Replace.
Check the injector drive circuit.
Check the injector as a single unit.
The fuel pressure is not proper.Check the fuel pressure.
I
Vacuum hose disconnected or damagedRepair or replace.IMalfunction of
the engine control unit) Replace.
Wire breakage or short circuit occurs in theRepair or replace.
harness, or the connector is improperly connected.
Trouble in the MPI systemCheck for output of self-diagnosis
code.Read the code with a voltmeter.Malfunction
of the sensor
l Intake air temperature sensor
Check the sensor-related circuit.
Check the sensor as a single unit
Probable causeRemedy
l Engine coolant temperature sensorl Barometric pressure sensor
l Ignition switchl Idle position switchl Throttle position sensorl No. 1 cylinder TDC sensor, crank angle sensor
l TDC sensor, crank angle sensor<2.0L DOHC Engine>
l Power steering oil pressure switch
l Air conditioner switch
l Inhibitor switch l Motor position sensor <1.8L Engine>l Air flow sensor0 Oxygen sensorMalfunction of the engine control system
l
Stepper motor <2.0L DOHC Engine>l Injector0 Power transistor
Check the actuator-related circuit.Check the actuator as a single unit.
Page 462 of 1216
Page 463 of 1216
Page 464 of 1216
CONTROL FUNCTIONS
<1.8L Engine>
NWEEE- -
FunctionAir-fuelIgnitionIdleAir con-FuelPurgeEGRmixture
timingspeedditionercontrol
controlcontrolpower“d”,i2controlcontrol
relaycontrol
Functional elements
control
In-Power supplyXXXXXXX
Put(Ignition switch coupled)
Power supply (battery backup)
XXXXXXXAir flow sensor
XXXX
lgnitron switch ST terminalXXX(start srgnal)Power
steenng oil pressure switchX
Jut- InjectorXlutIdle speed control servoXPower transistor
X
Arr conditioner power relayX
Control relayX
Purge control solenord valveX
EGR control solenoid valveX
NOTE*:
FUEL SYSTEM - Troubleshooting
Page 465 of 1216
Page 466 of 1216
FUEL SYSTEM - Troubleshootinn
MPI CIRCUIT1.8L
Engine
VSIBLE3ST1REI--
IGNITIONSWITCHtIGl)
c-59
12s
m458
j;WKPUMP
:ONNECTOR
IGNITIONCOIL
ISTOR
CRANK ANGLAND TOP DE!iDCENTER SENSOR
\/---DISTRIBUTOR5ASSEMBLY
'pcuc
n
,L)‘E
;
6
b
E-
5
5
08 C-64/1
tci3j4
I21
------
-.Vr
MPICONTROLRELAY
r
I
h
Lkn
39‘---,
i
lsil12
iz;.
c-65a-66
135-AC-U0514-NC
Page 467 of 1216
FUEL SYSTEM - Troubleshooting14-13
3-BW
COMBINATION
CJa
C-69
-1
c
C-6;
SUB FlLINK(
cQ
C-65 6L
7 3
69
10A
6
14
>
18
0
iz
_---.
13
SIBLE
l-47 loB
Q
l1
'Tc?
--I2 c-50
pil!Ezq:
I
1
I
E
.I
; A-22
1
;&&CATED
C-64
'12 C-58
ON+OFF:21OkPa@OPsI)
%iEi33lmOWOFF:
g#~~p384"8l~
21OOkPaC29BPsl)
Page 468 of 1216
FUEL SYSTEM - Troubleshootina
MPICONTROLRELAY
k%sEiow
A-36
INMKR AIRAIRnormmcR RRRew
\/\/\/ \/ \/"3"5"4 "6 “13
sc3m -sd
.02 C-64
MPICONTROLUNIT
MOTORW3P;;ONIDLESWITCHBE"&@-j@"T f#nibi
B-03SENSORB-30B-02
=y-Qgg&q/Y[81
j-1
H
EGR;;i;;;ATURE
(VEHICLES FORCALIFORNIA)
B-06 m
KX35-AC-U0614A-NC
Page 469 of 1216
FUEL SYSTEM - Troubleshooting14-15
MPICONTROLRELAY
F EGR CONTROLSOLENOIDi VALVEd
'W CLES
”
1 CALIFORNIA)
I :‘, lo-16
xEDI
2
r3
.&
-L
,
8,
P
1
-.--I3
I1.--3
I--
12
al-62
A-47
SELFDIAGNOSISu
,.
1
B-26
@12
OXYGEN= SENSOR
cz1
B-04
Em
IDLE SPEED
CONTROL
ACTUATOR POWER
i;EERING
F'tF=;;RE
B-17 D
Page 470 of 1216
Trending: window, spare wheel, fuel pressure, boot, service reset, radiator, trunk
