1989 MITSUBISHI GALANT lights

00-l 6GENERAL - Precautions before Service
Caution
1. Before connecting or disconnecting the negative
cable, be sure to turn off the ignition switch and the
lighting switch.
(If this is not done,there is the possibility of
semiconductor parts being damaged.)
2.For MFI-equipped models, after completion of the
work steps [when the battery’s negative (-) termi-
nal is connected], warm up the engine and allow it
to idle for approximately five minutes under the
conditions described below, in order to stabilize
engine control conditions, and then check to be
sure that the idling is satisfactory.
Engine coolant temperature:
85-95X (185-203°F)
Lights, electric fans, accessories: OFF
Transaxle: neutral position (A/T models: “N” or
“P”)
Steering wheel:neutral (center) position
mm (tn.1
Scan Tool(Multi-use tester)
ROM pack
1
VEHICLE WASHING
If high-pressure car-washing equipment or steam car-washing
equipment is used to wash the vehicle, be sure to maintain the
spray nozzle at a distance of at least 300 mm (12 in.) from any plastic parts and all opening parts (doors, luggage compart-
ment, etc.).
SCAN TOOL (1) To operate the scan tool, refer to the “Scan Tool Operation Instructions”.
Connection and disconnection of the scan tool should
always be made with the ignition switch in the OFF
position.
(2) Always use a ROM pack that is appropriate for the vehicle.
1 ROM oack1 Aoblicable models
1 MB9913071 1989 modelsI
1 MB9913271 1990 modelsI
1 MB991359( 1991 models
IMB991 4231992 modelsI
1 MB9914661 1993 models
TSB Revision

II-8ENGINE - Service Adjustment Procedures
8 VALVE
W Tlmlng belt side
il6
16
727
(3) If any abnormal noise IS not eliminated by racing, check the
lash adjuster.
@ Stop the engine.
@ Set the engine so that cylinder No. 1 is positioned at
the top dead centre of the compression.
@ Press the rocker arm at the area indicated by the+ arrow mark to check whether the rocker arm is lowered
or not.
@ Slowly turn the crankshaft 360 degrees clockwise.
@ In the same procedure as Step 0, check the rocker
arm at the area indicated by the
0 arrow mark.
@ If the rocker arm lowers easily when the part directly
above the rocker arm lash adjuster is pressed, the lash
adjuster is defective and must be replaced. When re-
placing the lash adjuster, bleed the air from all adjus-
ters and then assemble them. Then inspect with proce-
dures
@ to 0, and confirm that there are no abnormal-
ities
NOTE
lThe lash adjuster can be accurately checked for de-
fects with the leak down test.
l Refer to the engine service manual for the leak down test and lash adjuster air bleeding procedure.
If the rocker arm is extremely hard when pressed
down, the lash adjuster is normal, so look for a different
cause of abnormal sound.
COMPRESSION PRESSURE CHECK
MllFFAL
(1) Before inspection, verify that the engine oil, starter motor and battery are normal. Then, perform the following.
l Engine coolant temperature:
80- 95°C
(176- 203°F)
l Lights, electric cooling fan and accessories: OFF
l Transaxle:
P range
0 Steering wheel: Neutral position
(2) Disconnect the spark plug cable.
(3) Remove all the spark plugs
(4) Disconnect the connector of the distributor.
NOTE
This will prevent the engine control module from controll- ing the ignition and fuel injection.
TSB Revision

11-58ENGINE - Service Adjustment Procedures
4 Timing belt sideI
6EN0515
(3) lf
any abnormal noise IS not eliminated by racing. check the
lash adjuster
@ Stop the engine.
@ Set the engine so that cylinder
No. 1 IS positioned at
the top dead centre of the compression.
@ Press the rocker arm at the area indicated by the+
arrow mark to check whether the rocker arm is lowered
or not.
@ Slowly turn the crankshaft 360 degrees clockwise.
@ ln the same procedure as Step 0, check the rocker
arm at the area indicated by the
4 arrow mark.
@ If the rocker arm lowers easily when the part directly above the rocker arm lash adjuster is pressed, the lash
adjuster is defective and must be replaced. When re- placing the lash adjuster, bleed the air from all adjus-
ters and then assemble them. Then inspect with proce- dures
@I to 0, and confirm that there are no abnormal-
ities.
NOTE
lThe lash adjuster can be accurately checked for de-
fects with the leak down test.
l Refer to the engine service manual for the leak
down test and lash adjuster air bleeding procedure.
If the rocker arm is extremely hard when pressed
down, the lash adjuster is normal, so look for a different
cause of abnormal sound.
DASH POT INSPECTION AND ADJUSTMENT

(1) Perform after inspecting the idle rotation speed.
(2) The vehicle should be prepared as follows before the inspection.
l Engine coolant temperature:
80- 95°C
(176- 203°F)
lLights, electric cooling fan and accessories: OFF
l Transaxle: Neutral
l Steering wheel: neutral position
(3) Either set the tachometer or connect the data link connec- tor (white) to the scan tool.
NOTE
For setting the tachometer. refer to GROUP 13 - Service
Adjustment Procedures.
(4) Start the
engine.
(5) Open the throttle valve until the dash pot rod is fully
stroked.
(6) Gradually close the throttle valve until you find the point where the throttle lever touches the dash pot rod (the dashpot begins to shorten).
Maintain the throttle valve at this touching point,
(7) Check the engine speed (speed when the dash pot begins to operate).
Standard value: 3,900
f 200 rpm
(8) If outside the standard value, loosen the rod’s lock nut and turn the rod to adjust.
(9) To release the maintained state of the throttle valve, check that the engine speed gradually decreases to the idle speed, (10)Disconnect
the closed throttle position switch connector
(fixed SAS).
1 TSB Revision

ENGINE - Service Adiustment Procedures11-59
7 Go;;ikv position
switch
(11)Check that there is continuity between the closed throttle
position switch terminal and body.
NOTE
When there is continuity, a clearance will be created between the throttle lever and dash pot rod when the dash
pot rod is pressed lightly.
(12) When there is no continuity, lower the engine speed when the dash pot begins operation to within the standard value
tolerance. Make sure to create continuity between the
closed throttle position switch terminal and body.
COMPRESSION PRESSURE CHECK Ml 1 FFAL
(1) Before inspection, verify that the engine oil, starter motor
and battery are normal. Then, perform the following.
lEngine coolant temperature: 80- 95°C
(1 76- 205’F)
l Lights, electnc
cooling fan and accessories: OFF
0 Transaxle: P range 0 Steering wheel: Neutral position
(2) Disconnect the spark plug cable.
(3) Remove all the spark plugs.
(4) Disconnect the connector of the crankshaft position sensor.
NOTE
This will prevent the engine control module from controll- ing the ignition and fuel injection.
(5) Cover the spark plug holes with a cloth, etc., and crank the engine. Then verify that no foreign material sticks to the
cloth, etc.
Caution
1.During cranking, be especially careful of the spark plug
installing hole.
2. Very hot water, oil, fuel, etc., which may have entered
the cylinder somehow, will violently spout through the
spark plug hole if the compression is measured in the
entrapped state. This is
vex/ dangerous.
(6) Set up the compression gauge in the spark plug mounting
hole.
(7) Fully open the throttle valve, and cranking the engine.
measure the compression pressure.
Standard value: Up to 1991: 1,350
kPa (192 psi) [250- 400 rpml
From 1992: 1,550
kPa (220 psi) [250-400 rpm]
1 ,150 kPa (164 psi) [250- 400 rpml
Limit:

up to 1991: 960
kPa (137 psi) [250- 400 rpml
From 1992: 1 ,120 kPa (159 psi) [250- 400 rpml
CTurbo>
800
kPa (114 psi) [250- 400 rpml
(8) Measure the compression pressure of each cylinder. and verify that the pressure difference among the cylinders
is
less than the limit value.
Limit: max. 100
kPa (14 psi) TSB Revision
I

II-60ENGINE -Service Adjustment Procedures
(9) If a cylinder’s compression pressure or pressure differenceis outside the limit, fill a small amount of engine oil through
the spark plug hole and repeat Items (7) and (8) above.
@ If the compression is increased when the oil is filled, the piston
and/or cylinder wall may be worn or
damaged.
@ If the compression is not Increased even though the oil is filled, the valve may be thermally seized, the valve
contact may be improper or pressure may leak at the
gasket. (10)Connect the connector of the crankshaft position sensor.
(1l)lnstall
the spark plug and spark plug cable.
(12)Erase the diagnostic trouble code with the scan tool or re-
connect the battery (-)
cable 10 seconds or more after it
was disconnected.
NOTE
This will erase the memory of the diagnostic trouble code which resulted from disconnection of the crankshaft posi-
tion sensor connector.
MANIFOLD VACUUM INSPECTION MllFNAD
(1) Before inspection and adjustment, put the vehicle into the following state.
l Engine coolant temperature:
85-95°C (185-205°F)
l Lights, motor cooling fan, and accessories: OFF
l Transaxle:
N (Neutral)
l Steering wheel: Neutral
(2) Check that the idling revolution speed is normal.
(3) Remove the PCV hose from the PCV valve and attach a
vacuum gauge.
(4) Check that the negative pressure at the intake manifold
during idle revolution is normal.
Standard value: Approx. 500 mmHg
(20 in.Hg)
(5) If outside the standard value, isolate the cause by referring to the following table and repair the fault.
Symptom
CauseRemedy
l The vacuum gauge reading is less thanstandard value, but the pointer isl Ignition timing is retarded. l Adjust the ignition timing.
stable.
l The vacuum gauge pointer swings
slowly.l The gas mixture is excessivelyrich.l Check Multiport fuel injectionsystem.
l The vacuum gauge pointer drops irre- gularly.
l The gas mixture is excessively
lean.l Check Multiport
fuel injectionsystem.
l The vacuum gauge pointer drops inter-mittently to 30 to 160 mmHg
(1.2 to * Incomplete close contact of Intake
and exhaust valve seats.l Check and repair the valve.
6.3 in.Hg).
l The vacuum gauge pointer drops sud- denly
from the normal reading to 250 . Broken cylinder head gasketl Replace cylinder head gasket.
mmHg (9.8 in.Hg), then returns tonormal.
TSB Revision

13-32
FUEL SYSTEM - Troubleshooting/Service Adjustment Procedures
FUEL TANK AND FUEL LINEMlBEAAA
Symptom Probable cause Remedy
Engtne malfunctions
Bent or kinked fuel pipe or hose Repair or replace3ue to insufficient fuel
SUPPlYClogged fuel pipe or hoseClean or replace
Clogged fuel filter or in-tank fuel filter Replace
Water in fuel filter Replace the fuel filter or clean the fuel tank
and fuel line
Dirty or rusted fuel tank interior Malfunctioning fuel pump
(Clogged filter in the pump) Clean or replace
Replace
Evaporative emission Mispiping of vapor line
Correct
control system malfunc-
tions (When fuel tank Disconnect vapor line piping joint Correct
filler tube cap is re- moved, pressure releas-
Folded, bent, cracked or clogged vapor line Replace
ng noise is heard) Faulty fuel tank filler tube cap
Malfunctioning fuel tank pressure control
valve Replace
Replace
LL
m ~~ : Paper clip-
F l!;“I /yFp- -
izd--_7-01
A0086SERVICE ADJUSTMENT PROCEDURES
CURB IDLE SPEED INSPECTION
MlBFHAFt
(1) The vehicle should be prepared as follows before the inspection.
lEngine coolant temperature: 85-95°C (185-203°F)
l Lights, electric cooling fan and accessories: OFF
l Transaxle: Neutral
(P for vehicles with an automatic
transaxle)
(2) Connect a tachometer or connect the scan tool to the data
link connector.
NOTE
Refer to
P.13-33 for information concerning connection Of
a tachometer.
(3) Set a timing light in position.
(4) Ground the terminal for adjustment of ignition timing.
(5) Start the engine and let it idle.
(6) Check whether or not the ignition timing is the standard
value; if not, adjust.
Standard value:
5”BTDC + 2”
(7) Stop grounding the terminal for adjustment of ignition timing. .
(8) Let the engine idle for two minutes.
(9) Check the idling rpm.
Curb idle speed:
7502 100 rpm
NOTE
The idling rpm is automatically regulated by the idle-speed control system.
1
TSB Revision

FUEL SYSTEM -Service Adjustment Procedures 13-33
For a female
pin
For a male pin
(insert at side (Insert at lock tab side.,
opposite from lock tab.)
OlLO246
(10)lf not within the standard value range, refer to the CHECK
CHART CLASSIFIED BY PROBLEM SYMPTOMS and check the
MFI component.
BASIC IDLE SPEED ADJUSTMENT
MlBFHBA
(1) The vehicle should be prepared as follows before the inspection and adjustment.
l Engine coolant temperature:
85-95°C (185-205°F)
l Lights, electric cooling fan and accessories: OFF
l Transaxle: Neutral
(P for vehicles with an automatic
transaxle)
(2) Slacken the accelerator cable enough.
(3) Connect the scan tool to the data link connector (white).
(4) If the scan tool is not used, follow the steps below.
@I Insert a paper clip (from the harness side) into the l-pin connector shown in the figure at the left.
Take care not to disconnect the connector.
Caution
The paper clip should be inserted between the
terminals as shown in the figure at the left., @ Connect a primary-voltage-detection type of tacho-
meter to the paper clip.
TSB Revision

13-50 FUEL SYSTEM - On-Vehicule Inspection of MFI Components
INSPECTION
Using Scan Tool
Item No. Data display Inspection conditions
12Sensor de-
tection air
volume (fre-
quency) . Engine coolant
temperature: 85-95°C(185-205°F). Lights, cooling fan, elec-
trical accessories: OFF
. Transaxle: neutral (iVT
models: “P” range)
RacingFrequency in-
creases as racing
rpm increases.
NOTEThe 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].
Regular waveform 03A0203
HARNESS INSPECTION
@
Harness sideconnector
6
0-0
~
0
=
Using Oscilloscope
(1) Run the engine at idle speed.
(2) Connect the probe to the
osilloscope pick-up point a
s
shown in the circuit diagram, and check the wave form.
Measure the power supply voltage.
. Connector: Disconnected
. Ignition switch: ON
--P
IRepair the
Harness sideconnector
Measure the terminal voltage.
. Connector: Disconnected
. Ignition switch: ON ~

0
OK’ 30
Repair the
harness
.
cm-an)
TSB Revision1