1989 MITSUBISHI GALANT sensor

FUEL SYSTEM - ?::;:r%t~pection Of MF’13439
ON-VEHICLE INSPECTION OF MFI COMPONENTS
COMPONENT LOCATION
6FUO843
Name Symbol NameSymbol
Air conditioning compressor clutch relay A
Ignition coil (ignition power transistor)
L
Air conditioning switchTIgnition timing adjustment terminalK
Camshaft position sensor and crankshaft posi- InjectorHMtion sensor- Multiport fuel injection relayU
Check engine/malfunction indicator lampS- Oxygen sensorN
Data link connectorQ- Park/Neutral position switch (A/T)6
EGR solenoid I- Power steering pressure switchP
EGR temperature sensor 0
Throttle position sensor (with closed throttle
position switch)
EEngine control modulev
Engine coolant temperature sensorFVehicle speed sensor (reed switch)R
Evaporative emission purge solenoidJVolume air flow sensor (with incorporated,in-
take air temperature sensor and barometncC
Fuel pump check terminalGpressure sensor)
Idle air control motor
D
NOTEThe “Name” column is arranged in alphabetical order. TSB Revision

FUEL SYSTEM - ::ii,,k:t~pection Of MF’13-141
6FuO984
Crankshaft position sensor
\\6FU193~
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1sl ) g , a&&iI& I.“: :
(;-omd!gs?~ 5, gt : .“*I-- L l2,, m ‘IFiTb;qF
/Check engine/malfunction
indicator lamp68b.0093
B :iG i 1
,i mIl-
11
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3
(1P
I”;l-i-yCL, ,\i / ,---_ /
’ - ’ +-+j$p2E~~;:c9h
/ /I----4 ) Jj 1 1’ 6FU0656
68mosJ
I(>/
!,ij”_II. .:a L-2__--. ~-~-Air conditioning I~.~ ~..
LT. --..-6FUO64!
TSB Revision

On-Vehicle Inspection of MFI
13450FUEL SYSTEM VALVE> - Components
VOLUME AIR FLOW SENSOR
Intake air amountWsec)16245
1
@ Componentsideconnectof
Multiport
fuel
injection relay
/ohme air flow sensor/\2/\-
@Harness side
Isv xI 6FU1952
OPERATION TROUBLESHOOTING HINTSRefer to
P.13-49.
INSPECTION
Using Scan Tool
Item No.
12
Data displayInspection conditions Engine condition
Standard value
Sensor de- . Engine coolant Idle speed
18-44 Hz
tection airtemperature: 85-95°C
volume (fre- (185-205°F)
quency)
. Lights, cooling fan, elec-
2,000 rpm64-l 04 Hz tricaI
accessories: OFF
Transaxle: neutral
(PJTmodels: “P” range)RacingFrequency in-
creases as racing rpm increases.
NOTE
The volume air flow sensor output frequency may be about 10% higher than\
indicated above when the vehicle is new[driven approximately 500 km (300 miles) or less].
TSB Revision
1

On-Vehicle Inspection of MFIFUEL SYSTEM VALVE> - Components 13451
Using Oscilloscope
(1) Run the engine at idle speed.
(2) Connect the probe to the osilloscope
pick-up point as
shown in the circuit diagram, and check the wave form.
Regular waveform03AO203
HARNESS INSPECTION
Check for continuity between volume
air flow sensor and
multiport fuel in-
jection relay.
l
Multiport fuel injection relay con-
nector: Disconnected
l Volume air flow sensor connec-
tor: Disconnected
NOTE
Touch the circuit tester probes to
both ends of the harness
a+
OK 121
harness side
connector6FU1953
connector
Check for continuity of the ground-Icircuit.
0 Volume air flow sensor connec-WI+ 131tor: DisconnectedL-l I
OlR0262
/I
module harness
@ Harness sideconnector
= =
6FU1954
0O

K
-I+
Check for broken wire or short-circuit
to ground, between volume air flow
sensor and engine control module.
l Volume air flow sensor connec- tor: Disconnected
l Engine control module connec- tor: Disconnected
El4
Repair the
harness.
(ml-El)
Measure the impressed voltage.
0 Volume air flow sensor connec- tor: Disconnected
l Engine control module connec-
tor: Connected
l Ignition switch: ONconnector
Voltage (V)
4.8 - 5.2
I TSB Revision

13-152FUEL SYSTEM (SOHC-16 VALVE> - %i;:%~spection Of MF’
INTAKE AIR TEMPERATURE SENSORMl3YGAA
Volume air flow sensor
Volume air flow sensor
(built in intake air
(built in intake air
Intake
airtemoerature sensor
Engine control
module connector
I
TemperaturewTemperature1621006142468
@ Volume arr tlowsensor connector [-1 ~$%re
Harness side
connector k
A 72
~o~~~e p-$-J 5v
7FlD&53
6FU1955
OPERATION
TROUBLESHOOTING HINTS INSPECTION
Using Scan Tool
Refer to
P.13-51.
HARNESS INSPECTION @ Harness side
connector
-,T
[
a
1
g@-r.
Check for continuity of the ground
circuit.
l Volume air flow sensor connec-
tor: Disconnected
Repair the
+ harness.
/ (ml-El)
OlRo262 II
TSB Revision

FUEL SYSTEM - ::ii$%tt=pection Of MF’13-153
@ Harness srdeconnector
Check for open circuit or short circuit
to ground, between intake air tempera-
ture sensor and engine control mod-
ule.
0 Volume air flow sensor connec-/
tor: Disconnected
l Engine control module connec-
tor: DisconnectedI Repair th
e
+ harness.
I @El -El)
@ Harness side connector
6FU195C
1
[IMeasure the impressed voltage.n
~
A
0 Volume air flow sensor connec-
tor: Disconnected
l Engine control module connec-
tor: Disconnected
l lqnition
switch: ON
-
Replace
Voltage
(VI1 c#?g -+ zl;;fne
4.5 - 4.9 moaule.
SENSOR INSPECTION Refer to P.13-52.
TSB Revision

On-Vehicle Inspection of MFI13-154FUEL SYSTEM - components
BAROMETRIC PRESSURE SENSOR
MlJYHA4
Barometnc -pressure
sensor
htput Voltage
Barometric pressure
mmHg 760 ~~1551
CR Volume air flowBarometric pressure sensorI I
I-.____A__sensor conneclur
mB Harness sideconnector
,\ , , ,.k ,Im jfl5EL1600
6FU1957
Engine control module connector
7FlfO653
OPERATION TROUBLESHOOTING HINTSINSPECTION
Using Scan Tool Refer to
P.13-53.
HARNESS INSPECTION
@ Harness sideconnector I,?
la
1
gg
n
1Check for continuity of the ground-IIj circuit

.
/ 0 Volume air flo

w
----^- ^^^^^^ibd-b 121IsensorGUI II IGL-tor: Disconnectedw -
I
OlRO262 j
TSB Revision

FUEL SYSTEM - ::~,%~t~pection Of MF’13-155
L-J
2@ Harness side
@ Harness stde
connector Engine control
module harness
side connector
r----l65
mr01AO107
~Check for an open circuit, or a short-
circuit to ground between the engine
:control module and the barometric
pressure sensor.
il Volume air flow sensor connec-
tor: Disconnected
l Engine control module connec-
tor: Disconnected
Measure the impressed voltage of the
barometric pressure sensor.
l Volume air flow sensor connec- tor: Disconnected
l Engine control module connec-
tor: Connected
l Ignition switch: ON
Voltage
(VI
Replace
- the engine 1
control
module.
IOIAO233 I4.8 - 5.2I
Engrne coolant
Engine coolant
@ Equipment temperature sensorside connector
Enginecontrol
module
72
6
3
I fh5v
Engine coolanttemoerature
Engine control module connector
7FW6!53
9FUO106
TSB Revision