1989 MITSUBISHI GALANT Service Repair Manual

FUEL SYSTEM -
On-Vehicle
Inwection of MFI
ComDonents13-315
INSPECTION OF ENGINE CONTROL MODULE
TERMINAL VOLTAGEM13zALCa
Refer to P.13-105.
TERMINAL VOLTAGE CHECK CHART
Terminal arrangement of engine control module connector
l!m n-J-J-l-II
NOTE:B+: Battery
positive voltage
TerminalCheck item Check condition (Engine state)Standardvalu
e
Remarks
No.
103
102
107
Backup power
SUPPlY
Power supply
Ignition switch: OFFB+
Ignition switch: ONB+
110
13
63
66 56
23
Ignition switch-IGIgnition switch: ON
Fuel pump Engine: Cranking
drive signal Engine: Idling
Multiport fuel Ignition switch: OFFinjection relay
(Power supply)Ignition switch: ON
Multiport fuel Ignition switch: ON
injection relay
(Fuel pump) Engine: Idling
Sensor impressed Ignition switch: ONvoltage
B+
8V or higher
B+
B+
o-3v
B+
o-3v
4.5- 5.w
10
8
16
20
Volume air flowsensor
Ax intaketemperature
sensor
Barometric
pressure sensor
Engine coolant
temperature sensor Engine: Idling
2.2-3.2V
Engine speed: 2,000 rpm
IgnitionAir Intake temperature of 0°C (32°F)3.2- 3.8V
switch:
ONAir intake temperature of 20°C (68°F)2.3- 2.9V
Air intake temperature of 40°C (104°F) 1.5-2.1V
Air intake temperature of 80°C (176°F)0.4- 1 .OV
Ignition Altitude of 0 m (0 ft.)3.7-4.3v
switch
:
ONAltitude of 1,200 m (3,937 ft.)3.2-3.8V
IgnitionCoolant temperature of 0°C (32’F)3.2-
3.Wswitch:ONCoolant temperature of 20°C (68°F)2.3- 2.9V
Coolant temperature of 40°C (104°F)1.3- 1.9V
Coolant temperature of 80°C (176°F) 0.3-0.9V
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13-316FUEL SYSTEM -On-Vehicle
Inspection
of
MFI
Components
TerminalNo.Check itemCheck condition (Engine state)Standardvalue
Remarks
19Throttle positronIgnition switch: ItSet the throttle valve to the0.4- 0.wsensorIS kept ON for 15seconds or moreidlrng position.
Fully open the throttle valve.4.5- 5.5v
14
Closed throttlelgnrtrono-1vposition switchswitch:Set the throttle valve to the idling
position.
ONSlightly open the throttle valve.4V or higher
22Camshaft posi-tion sensorEngine: Cranking0.2- 3.ov
Engine: ldlrng
21
Crankshfat posi-tion sensor Engine: Cranking0.2- 3.ov
Engine: Idling
108lgnrtion switch-STEngine: Cranking8V or higher
104
Park/neutral
pos-ition switchIgnitionSet the selector lever to P or N.o-3vswitch:ONSet the selector lever to D, 2, L or R.8- 14V
18Vehicle speedl Ignition switch: ON
sensorl Slowly run the vehicle forward0 - 5v(Repeat the
variation.)
5Power steering
pressure switchEngine:Idling opera-Steering wheel idle stateB+
tion afterwarming-upDuring steering wheel operationo-3v
7A&;;;ditioningEngine:Idling _Turn OFF the air conditioning switch.o-3v
Turn ON the air conditioning switch.B+
(The air conditioning compressor is in
the drive state.)
35Air conditioningl Engine: IdlingB+ orcompressor
clutch relayl Air conditioning switch: OFF -, ON(The air conditioning compressor is in the
temporarily
drive state.)6V or higher o’-
3v
1Heated oxygen
sensorEngine: Keep the engrne speed at 2.000 rpmafter warming up.
(For checking, use a digital voltmeter.)ke;atoZivariation.)
51No. 1 InjectorEngine: After warming up, rapidly press the
52No. 2 Injector accelerator pedal from the idlrng state,Voltage
temporarily
drops slightly
30No. 3 Injectorfrom 14V to1 IV.
51No. 4 Injector
j8
Stepper motorcoil Engine: Soon after the warmed up engine isB+started (approx. 1 minute)
i9
Stepper motor0%
coil (Repeat the
variation.)
‘7Stepper motorcoil
8Stepper motorco11
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FUEL SYSTEM -On-Vehicle
Inspection
of MFI
Components13-317
TerminalNo.
54
55
62
57
105
I
01
2
i
E
Check item
Ignition power
transistor unit Check
condition (Engine state)
Engine speed:
3.000 rpm
Standardvalue
0.3- 3v
Remarks
Evaporativeemission purgeIgnition switch: ONB+
solenoidKeep the engrne speed at 3.000 rpm after thewarmed-up engine is started,o-3v
Fuel pressure
solenoidlgnltlon switch: ON
Engine:
Cranking - Idling(Within approx. 2 seconds)
B+
o- 3v1
B+
TurbochargerNaste gate sole-Ignition switch: ONB+ ioid
Engine: Idling (When premrum gasoline IS used.)0-3~
3oost meter
Ignition switch: ON4-13v
Engine: After warming up, rapldly press theaccelerator pedal from the idling state It temporarily
drops-slightlyIfrom B+.
Engine ignrtlonslgnalEngine: 3,000 rpm0.3-3v
lgnrtion timingadjustment
terminalIgnition Ground the ignition timing adjustment 0- 1Vswitch:terminal.ONRelease the ground of the ignition4.0- 5.5vtiming adjustment terminal.
Check engine/
malfunction indi- Ignition switch: OFF - ONo-3v
cator lamp9’- 13v(After several
minutes have
elapsed)
EGR solenoidIgnition switch: ONB+
Engine: After warming up, rapidly press theaccelerator pedal from the idling state. It temporarilydrops slightly
from B+.
EGR temperatureIgnitionSensor temperature of 50°C (122’F)3.6- 4.4V
rSt?MX
I
swlrcrl:nhir--.%?nY/V-_. ..sof temperature of 100°C (21.20~)2.2-3.0~
Engine: Idling operation after warming
UP
o-3v
B+
Engine &ed: 5.000 rPmB+
\ Anti-lock braking
signal
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-
‘i

13-318FUEL SYSTEM - Fuel Tank
FUEL TANK MIBGA-AREMOVAL
AND INSTALLATION


3
Removal steps 03A0284
1. Fuel tank filler tube cap2. Drain plugl + 3. Return hosel +
4. Vapor hose
5. Fuel gauge unit connector
6. Electrical fuel pump connector
l 47. High pressure hose to fuel pumpconnectionI)+ 8. Filler hose~1Weasuerment of Fuel PressureH 9. Vapor hose+4 10. Self-locking nut1 I. Tank band stay12. Tank band
13. Fuel tank
I)+ 14. Vapor hose
l + 15. Fuel tank pressure control valveCaution
16. Fuel gauge unitWhen disconnecting the high pressure fuel hose, cover
17. Electrical fuel pumpthe hose connection with rags to prevent splash of fuel
18. Fuel tank filler tube that could be caused by some residual pressure in thefuel pipe line.
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FUEL SYSTEM - Fuel Tank 13-319
Fuel tank pressure
control valve
Rubb& hose
side
003041
03FOO1
INSPECTIONMl3GCAIl
l Check the hoses and the pipes for crack or damage.
lCheck the fuel tank filler tube cap for malfunction.
lCheck the fuel tank for deformation, corrosion or crack.
l Check the fuel tank for dust
Qr foreign material.
NOTE
If the inside of the fuel tank is to be cleaned, use any one
of the following:
(1) Kerosene
(2) Trichloroethylene
(3) A neutral emulsion type detergent
FUEL TANK PRESSURE CONTROL VALVE
(1) Remove the fuel tank pressure control valve.
(2) Check the valve function after a clean rubber hose is in-
stalled on it.
1 Check procedureNormal function
I
Blow from the inletAir pressure through after you
(fuel tank side). feel a slight resistance.
I
I
Blow from the outlet (evapora-Air flows.
tive emission canister side).
I
(3) Check the valve for crack or leakage.
SERVICE POINTS OF INSTALLATION
MlJGDAIl
15. INSTALLATION OF FUEL TANK PRESSURE CONTROL VALVE
Install so that the fuel tank pressure control valve is facing
in the direction shown in the figure.
14./4. CONNECTION OF VAPOR HOSE/3. RETURN HOSE
When attaching the fuel hose to the pipe, be sure that the
hose is attached as shown in the illustration.
Standard value : 25-30 mm (1.0-1.2 in.)
10. INSTALLATION OF SELF-LOCKING NUT
Tighten the self-locking nuts until the rear end of the tankband
contacts the body.

13-320FUEL SYSTEM - Fuel Tank
03RO297
V/apor hose
mmin.)
3FOO7
Filler
hoseB
A Flare nut
\Secure side 03YO43
Ll
9. CONNECTION OF VAPOR HOSE/8. FILLER HOSE
(1) The vapor hose should be connected all the way at the
tank, and approximately 40 mm (1.6 in.) at the fuel tank
filler tube.
(2) The end of the filler hose with the shorter straight pipe part should be connected at the tank side.
7. CONNECTION OF HIGH PRESSURE HOSE TO FUEL
PUMP
Temporarily tighten the flare nut by hand, and then tighten
it to the specified torque,
bein,g careful that the fuel hose
does not become twisted.
Caution
When tightening flare nut, be careful not to bend or
twist line to prevent damage to fuel pump low connec-
tion.
FUEL PUMP REPLACEMENT
(1) Disconnect the fuel pump connector.
(2) Remove the fuel tank filler tube cap.
(3) Drain the fuel.
Ml3GFAt.X
(4) Disconnect the fuel high pressure hose and main pipe.
Caution
Cover the hose connection with rags to prevent splash
of fuel that could be caused by some residual pressure
in the fuel pipe line.
(5) Loosen the self-locking nuts to the end of the stud bolt.
(6) Disconnect the lateral rod right side body coupling; then
lower the lateral rod and use wire or similar material to
suspend from the axle beam.
(7) For models equipped with the ACTIVE-Electronic Control Suspension
(E.C.S.) disconnect the rear height sensor and
the lateral rod. (Refer to GROUP
33B-Service Adjustment
Procedures.)
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FUEL SYSTEM - Fuel Tank 13-321
I03LOO18
-
QGB ua \
a=
C-CT
0a
c oc3i20’0Qaa
Positidning projection
03L0000
(8) Remove the fuel pump installation screws and the bolt for
holding the fuel pump (at the lower side of the fuel tank),
and then remove the fuel pump from the fuel tank.
(9) Align the three positioning projections of the packing with the holes in the fuel pump.
(lO)When the fuel pump is installed, the holding bolt at the
lower side of the fuel tank should be installed first. Care should be taken at this time that the O-ring is not
pinched.
(1 l)For models equipped with the ACTIVE-E.C.S., check the operation of the ACTIVE-E.C.S. after installation of the rear
height sensor. (Refer to GROUP
33B-Service Adjustment
Procedures.)

13-322FUEL SYSTEM - Fuel Tank
FUEL TANK MlJGA-B
REMOVAL AND INSTALLATION
Sealant:
3M ATD Part No.8625or equivalent
30-40 Nm
22-29 ftlbs.
5
\\
\I@Release of Residual Pressure from High
11aMeasurement of Fuel Pressure
l-2 Nm0.7-1.4 ftlbs.\30-40 Nm
22-29 ftlbs.
\h
21-31 N/m15-22
ftlbs.
Removal steps
1. Fuel tank filler tube cap2. Drain plug3. Return hose (Refer to P.13-319.)4. Vapor hose 5. Fuel high pressure hose (Refer toP.13-319.1
17-2
6
12-1s
;~\*3~o,,.
Es.6
6. Filler
ho&7. Vapor hose (Refer to P.13-319.)8. Protector
9. Hole cover
IO. Self-locking nut11. Fuel tank
12. Fuel tank pressure control valve (Refer toP.13-319.)
13. Fuel pump and gauge assembly14. Fuel tank filler tube Caution
When disconnecting the high pressure fuel hose, cover
the hose connection with rags to prevent splash of fuel
that could be caused by some residual pressure in the
fuel pipe line.
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