1989 MITSUBISHI GALANT check engine light

13-182FUEL SYSTEM - ~~~;~~~t~pection Of MF’
INSPECTION
Using Scan Tool
Function1 Item
No. ’Data display 1Check conditionI Coolant temperature Standard value
IData reading / 41Drive trme
*’ 1Engine: Cranking0°C (32°F) *2Approx. 20 ms
j: 20°C (68°F)Approx. 40 ms 80°C
(176°F)/ Approx. 9.8 ms
Data reading
NOTE Item
No.
41 i
Data display 1
Check condition
IEngine state 1Standard value
Drive time
*3l Engine coolant temperature: 85 to
95°C (185 to 203°F)
l Lights, electric cooling fan, accesso-ries: OFF
l Transaxle: Neutral
(P range for AIT) Idle
speed
1 2.2-3.4 ms
*‘:The injector drive time refers to when the supply voltage is 11 V and the cranking speed is less than 250 rpm.
*2:When engine coolant temperature is lower than 0°C (32°F). injection is made by four cylinders simultaneously.
*3:When the vehicle is new [within initial operation of about 500 km (300 miles)], the injector drive time may be about
10% longer
Function Item No
.
Drive content Check condition Normal state
Actuator test
01No. 1 injector shut off Engine: Idling afterI Idle state to change further
0
2
No. 2 injector shut off
- warm-up
(becoming less stable or
(Shut off the injectors in stalling)
03li No. 3 injector shut off sequence during after-engine warm-up, check1
I04No. 4 injector shut off
the idling condition)
-k
Imp
4 AL A: Inje,t,r--m--m-Normal waveformdrive time03*0209
(1) Run the engine at idle speed.
(2) Connect the probe to the oscilloscope pick-up point as
shown in the circuit diagram, and check the waveform at
the drive side of each injector.
1
TSB Revision 1
Using Oscilloscope

13-186On-Vehicle Inspection of MFI
FUEL SYSTEM - Components
IGNITION COIL AND IGNITION POWER TRANSISTOR
-Distributor(built inignition coiland Ignitionpower
transistor)
Equrpment srdeconnector8”
Engine control module connector Spark
plug
Iynitron coil ‘r ,
lgnitron switch (IG,)
Distributor/,@)f1
9 Harness side
connector
4
lgnrtion timingadjustment
connector
7FU0653
Engine control module 9FUOO35
OPERATION Refer to
P.13-96.
INSPECTION Using

Scan Tool
Function
/ Item No.
Data reading
i 44 Data display
iCheck condition jEngine state
Standard value_.-___-- -
-
Ignition
advance
l Engine: Warming up Idle speed
0- 13 “BTDC
l Timing light: Set (set
timing light to check
actual ignition timing)
/--
-
2,000 rpm 19-39 “BTDC
1 TSB Revision1

FUEL SYSTEM - i%$-%~pection Of MF’13-193
TerminaNo.
19
52
-rII
i
t
c
65
L
63
64t
I:
I
Check Item :Check Condition (Engrne Condrtron)
Volume air flowj Engine: Idle speedsensor reset signal
1
Engine rpm: 3,000 rpm
Intake air tempera-1Ignition switch: ON When Intake atr temperature IS 0°C (32°F)ture sensor
When intake air temperature IS 20°C (68°F)
i When intake air temperature is 40°C (104°F)
When intake air temperature is 80°C (176°F)
lgnltlon switch: ON’ When altitude is 0 m
When altitude is 1,200 m (3,937 ft.)
Ignition switch: ON
i When engine coolant temperature IS 0°C (32°F)
When engine coolant temperature is 20°C (68°F)
When engine coolant temperature is 40°C (104°F)
Barometnc pressuresensor
Engine coolant
temperature sensor
Throttle positionsensor
67
68
69
51
115
1
1
Ic22
Closed throttle
position switch
Camshaft position
sensor
Crankshaft position
sensor
Ignition switch-ST
Park/neutral position
switch
Vehicle speed sensor
Power steering
pressure switch
Air conditioning
switch
-I
I When engine coolant temperature is 80°C (176°F)
‘I
) 0.3-0.9v
Ignition switch: ON Set throttle valve to idle position.
0.3-0.6V
iFully open throttle valve.1 4.5-5.5v
Ignition switch: ON
Set throttle valve to idle position.o-1v
’ Slightly open throttle valve4V or more
Engine: Cranking0.2-3.OV
Engine: Idle speed
Engine: Cranking0.2-3.OV
Engine: Idle speed
Engine: Cranking8V or more
Ignition switch: ON
( SetselectorlevertoPorN.o-3v
i Set selector lever to D. 2, L or R.8-14V
Ignition switch: ONi 04d5v
Move the vehicle slowly forward.(Changesrepeatedly)
Engine. Idling after warmrng upSteering wheel idle stateB+
During steering wheel operationo-3v
Engine: Idle speed
’ Turn the air conditioning switch OFFo-3vI
’ Turn the air conditioning switch ON.1 B+(Air conditioning compressor is operating)!
Engine: Idle speed1 B+or
Air conditioning switch: OFF-ONI temporarily
Turn the conditioning switch ON. (Air conditioning compressor is operat\
ing) 1
6V or morej 1
1 o-3v
/ Standard
value
/ o-1v
1 6-9V
1 3.2-3.8V
: 2.3-2.9v
1.5-2.1V
i 0.4-I .ov
j 3.7-4.3v
/ 3.2-3.8V
, 3.2-3.8V
1, 2.3-2.9v
1.3-l .9vI
Air conditioningcompressor clutchrelay
TSB Revision1

13-194FUEL SYSTEM VALVE> - ::~;:%~specion Of MF’
7-
i
TermrnalI
No. ,Check Ite
m
,Check Condrtion (Engine Condition)Standard
value
OttO.8V(Changesrepeatedly)
TFrom 1 l-14v.momen-
tarily drops
slightly
B+
o-1v
4.0-5.5v
o-3v19-13v
(After
several
seconds
have
elapsed)
B+
‘rom B+nomentarlly dropIS
I
56 1 Oxygen sensoriEngine: Running at 2,000 rpm after havrng warmed up. (Check using a
I ~
drgltal type voltmeter.)
3.6-4.4
V 2.2-3.OV
1.5-4v
(Momen-
tarily)
O-l V or 4.55.5v
1.5-4v
(Momen-
tarily)1D-IV or4.5-5.5v
2V or moreIMomen-tarily)LI-1 v
4V or moreMomen-:arily)1 I-1v
No. 1 Injector
No. 2 Injector
’ While engine is Idling after having warmed up, suddenly depress the
accelerator pedal.
1
14
2No. 3 Injector
15No. 4 Injector
Ignition power transistor unit~
Engine rpm: 3,000 rpm___-
Evaporative emission Ignition swatch: ON
purge solenoid
Runnrng at 3,000 rpm while engine is warmrng up after having beeni started.I
10II-
9
104Ignition timing
adjustment terminallgnttion switch: ON1 Earth the ignition trming adjustment terminal
I Remove the earth connection from the ignition
timing adjustment terminal.
CheckAir conditioning switch: OFF-ON
engine/malfunction
indicator lamp i
106
6
EGR solenoidlgnrtion switch: O
N
; Engine IS idling after having warmed up/j
EGR temperaturesensor
Ignition switch: ON
When the sensor temperature is
50°C (122°F).
When the sensor temperature is 180°C (212°F).
I 1I AC valve positlonsensor No.1Ignition switch: Immediately after turnrng ON5
18
AC valve position
sensor No.2lgnltion switch: lmmedlately after turning ON
dle air control motorclosed)Ignition switch: Immediately after turning ON
3le air control motor wen)lgnitlon switch:
Immediately after turning ON1
( t
i (
1 TSB Revision

13-196FUEL SYSTEM - General Information
FUEL SYSTEM
GENERAL INFORMATION
MFI SYSTEM DIAGRAMMl
3BA-A

*1 Injector*2 Ignition coil
(Low-
voltage power-drs-
tribution type)
*3 Idle air control motork4 Evaporative emis-
sion purge solenoid l Fuel pump control (Multiport
fuel injec-
tion relay)
l Air conditioning
corm- pressor clutch relay
* Ignition timing control) On-board diagnostic
output
) Check engine/mal-
function indicator
lamp
Engine coolant tem-
perature sensor
l Ignition swatch STl Power supplyl Vehicle-speed sen-sor
. Arr conditioning
switch
l Power steering
pressure
swatch
‘I Heated oxygen sensor ‘10*2
Volume air flow sensor *3

Intake air temperaturesensor‘4 Throttle position sensor *5
Closed throttle position
swrtch *6
Camshaft position sen-
sor “7
Crankshaft position sen-
sor“8 Barometrrc pressure
sensor
‘9 Engine coolant temper-ature switch (for cooler
cut-off)
Evaporatrveemrssion canister
Evaporatrveemlsslo”Idle airThronlecontrol motorl 3 Fast idle air valveI (Wax tvoe)position\Volume air/sensor3flow sensorf \//n,r\l 2 '8
- lnnhnn toll III1 II
II-“,--?% 11 11 EGR,/alveI.l”lll)i
Fuel injectorII
II
Vacuum hose color
G: Green
L: Light blue
I?: RedY: Yellow5: Black
Heated oxygen sensor Thermal
vacuu
a uCatalytrc converter
HMO163PCV: Positive CrankcaseVentilation
TSB Revision

‘1 Heated oxygen sensor‘2 Volume air flow sensor
“3 intake air temperature
sensor‘4 Throttle position sensor‘5 Closed throttle position
switch
‘6 Camshaft Dosltion sen-
so
r
*7 Crankshaft position sen-sor‘8
Barometnc
pressure
sensor
‘9 Engine coolant temper-
ature switch (for cooler
cut-off)
‘I 0 Knock sensor ‘11
Engien coolant tem-
perature sensor
l Ignition switch STl Power supplyl Vehicle-speed sen-
sor
l Air conditioningswitchl Power steeringpressure switch
Volume airflow sensor \
Idle air
FUEL SYSTEM - General Information13-197
* 1 Injector*2 Ignition coil (Low-
voltage power-dis-
tribution type)
*3 Idle air control motel*4 Evaporative emis-sion purge solenoid
l Fuel pump control (Multiport
fuel injec-
tion relay)
l Air conditioning com-pressor clutch relay
l Ignition timing control
l On-board diagnosticoutputl Check engine/mal-
function indicator
lamp
Evaporativeemissioncanister
Q
ThrottlepOSltlOnSt?“SW
\
control motor
r
Fast Idle air valveWax tape)
TSB Revision
e , lylllll”rl
COll
Fuel- wmpEGR valve
'1 A
Heated oxygen sensor /$$y/.\‘“I
w ‘11 Englen coolant temp. sensorF ‘9 Engine coolant temp. switch
Thermal vacuum valve
Crankshaft
position
sensor
‘7 positlon ICrankshaft
sensor
I
Camshaft‘6 positionsensor
Vacuum hose color G: Green
L: Light blueR: RedY: YellowB: Black
Catalytic convener
PCV: Posmve CrankcaseVentllatlon6EMO362

13-198FUEL SYSTEM - General information

*I Heated oxygen sensor *IO
EGR temperature sen-*2 Volume air flow sensor
sor‘3 Intake air temperature
*I 1Engien coolant tem-sensor
perature sensor‘4 Throttle position sensor . Ignition switch ST*5 Closed throttle position
l Power supply
switch l Vehicle-speed sen-
‘6 Camshaft
posltion
sen- sor
sor l Air conditioning“7 Crankshaft positron sen-
switch
SOT0 Power steering‘8 Barometric pressure pressure switch
sensor
‘9 Engine coolant
temper-
ature switch (for cooler
cut-off)
*l Injector*2 Ignition coil (Low-
voltage
power-dis-
tribution type)
*3 idle air control mot01*4 Evaporative emis- sion purge solenoid
*5 EGR solenoid
) Fuel pump control
(Multiport
fuel injec-
tion relay)
I Air conditioning com- pressor clutch relay I Ignition timing control
) On-board diagnostic
output
) Check enginejmal-
function indicator
lamp
Evaporativeemissioncanister
Volume air
flow sensorA..\
II
oressure db,Fun, taw”l”‘“‘~
Heated 0~““~” le
ax valve
e”SOrgme coolant temp.
Vacuum hose color
G: Green
L: Light blueR: RedY: YellowR. Rlnrk
Catalytic converter 6FU1596
PCV:
Positive Crankcase
Ventilation
TSB Revision

FUEL SYSTEM - General Information

*1 Heated oxygen sensor *2 Volume air flow sensor
‘3 Intake air temperature
sensor *4
Throttle position sensor
‘5 Closed throttle position
switch *6 Camshaft position sen-
sor
‘7 Crankshaft position sen- sor
‘8 Barometric pressure
sensor
‘9 Engine coolant temper-ature switch (for cooler
cut-off)
Volume air
‘10 Knock sensor
‘11 EGR temperature sen
sor‘12 Engien coolant tem- perature sensor
l Ignition switch STl Power supplyl Vehicle-speed sen-sorl Air conditioningswitchl Power steeringpressure switch
3
Throttleposition
sensor
IIntake air.‘3Fueltemp. sensorpressure *2-regulatorA-
-
.
cd
’
*l Injectorl Fuel pump control*2 Ignition coil (Low- (Multiport
fuel injec-voltage power-dis-
tion relay)
tribution type)
*3 Idle air control motorl Air conditioning com-
l 4 Evaporative emis- pressor clutch relaysion purge solenoidl Ignition timing control
t5 EGR solenoidl On-board diagnosticoutputl Check engine/mal-function indicatorlamp
Idle
aircontrol motorI Wax

wei
I
I
TSB Revision
Evaporativeemission
canister
Heared oxygen
It=
‘12 Engine coolant temp.sensor-‘I u
‘9 Engine coolant temp switch\
l 10 Knock sensor
EGR temperature
Crankshaftposltlon
EGR‘solenoid Vacuum hose colorG: GreenL: Light blue
R: RedY: Yellow
B: Black
Catalfllc converter
PCV: Positive Crankcase Ventilation