check engine MITSUBISHI GALANT 1989 Service Service Manual

ENGINE - Cylinder Head Gasket11-79
Front of engine I)Intake side
Exhaust side
OlR0391
Fuel rail/
Hig; pressure \
O-ring
hose
03Aoo79
< 1993 models>
(1) Use a scraper to clean the gasket surface of the cylin- der head assembly.
Caution
Take care that no foreign material gets into the
coolant passages or oil passages.
(2) When installing the cylinder head bolts, check that the shank length of each bolt meets the limit. If the limit is
exceeded, replace the bolt.
Limit: Max. 99.4 mm (3.91 in.)
(3) Apply engine oil to the threaded part of the bolt and the washer.
(4) According to the tightening sequence, tighten the bolts
to the specified torque 80 Nm (58 ftlbs.).
(5) Loosen bolts completely.
(6) Torque bolts to 20 Nm (14.5 ftlbs.).
(7) Tighten bolts
l/4 turns (90”) more.
(8) Tighten bolts
l/4 turns (90”) additionally.
TSB Revision 21. CONNECTION OF HIGH-PRESSURE FUEL HOSE
When connecting the high-pressure fuel hose to the fuelrail, apply a coating of engine oil to the hose union, and in-
sert so that the O-ring is not damaged.

ENGINE - Timing Belt11-83
1
r
20. REMOVAL OF TIMING BELTMake a mark on the back of the timing belt indicating the
direction of rotation so it may be reassembled in the same
direction if it is to be reused.
Caution
Water or oil on the belt shorten its life drastically, so
the removed timing belt, sprocket, and tensioner must be free from oil and water. These parts should not be
washed. Replace parts if seriously contaminated. If there is oil or water on each part check the front case
oil seals, camshaft oil seal and water pump for leaks.
24. REMOVAL OF CAMSHAFT SPROCKETS
(1) Using a wrench, hold the camshaft at its hexagon
(between the No.2
and No.3
journals) and remove the
camshaft sprocket bolt.
CautionLocking the camshaft sprocket with a tool damages
the sprocket.
(2) Remove the camshaft sprockets.
25. REMOVAL OF OIL PUMP SPROCKET
(1) Remove the plug on the side of the cylinder block.
(2) Insert
a Phillips screwdriver [shank diameter 8 mm
(.31
in.)] to block the left silent shaft.
(3) Remove the oil pump sprocket nut.
(4) Remove the oil pump sprocket.
31. REMOVAL OF TIMING BELT “B” Make a mark on the back of the timing belt indicating the
direction of rotation so it may be reassembled in the same
direction if it is to be reused.
Caution
Water or oil on the belt shorten its life drastically, so
the removed timing belt, sprocket, and tensioner must be free from oil and water. These parts should not be
washed. Replace parts if seriously contaminated.
If there is oil or water on each part check the front case
oil seals, camshaft oil seal and water pump for leaks.
TSB Revision

11-84
ENGINE - Timing Belt
QdiJ00°00B
rackCrack
Crack ’ 7EN207
Separation
Rounded belt side
Abnormal wear (fluffy canvas fiber)
7EN208
Rubber
exposed
Tooth
missing and
canvas fiber exposed
7EN209
6EN0159
Y
1
-
INSPECTION
TIMING BELTS MIlKCAC
The timing belts must be checked closely. Should the following
defects be evident, replace the belt with a new one.
(1) Hardened back surface rubber Glossy, non-elastic, and so hard that no mark is produced
even when scratched by a fingernail.
(2) Cracked back surface rubber.
(3) Cracked or separated canvas
(4) Cracked tooth bottom.
(5) Cracked side.
(6) Abnormal wear on side.
NOTE
Normal belt should have clear-cut sides as if cut by a sharp
knife.
(7) Abnormal wear on teeth. Initial stage: Canvas on load side tooth flank worn (Fluffy canvas
fibers, rubber gone and color changed to white, and unclear canvas texture)
Final stage:
Canvas on load side tooth flank worn down and rubber
exposed (tooth width reduced)
(8) Missing tooth.
TENSIONER PULLEY AND IDLER PULLEY
(1) Turn the pulleys to check for possible binding, excessive play, and unusual noise. Replace the pulley if any of these
defects is evident.
(2) Replace if there is a grease leak.
I1 TSB Revision

ENGINE - Timing BeltII-85
6EN0280
6EN0161
/6Ei40162
6
68
Plug
6EN0281 j
AUTO TENSIONER
(1) Check the auto tensioner for possible leaks and replace as necessary.
(2) Check the rod end for wear or damage and replace as necessary.
(3) Measure the rod protrusion. If it is out of specification, replace the auto tensioner.
Standard value: 12 mm (.47 in.)
(4) Using a vise with soft jaws push in the auto tensioner rod. If the rod can be easily retracted, replace the auto
tensioner. You should feel a fair amount of resistance when
pushing the rod in.
Caution
1.Clamp the auto tensioner in the vise so it maintains
a level position.
2. If the plug at the bottom of the auto
tensioner
protrudes, surround it with a plain
Lvasher as
illustrated to prevent the plug from being in direct
contact with the vise.
SERVICE POINTS OF INSTALLATION MllKDCF
37. INSTALLATION OF ENGINE SUPPORT BRACKET
Apply sealant to the bolt shown in the figure and tighten it
to the specified torque.
Specified sealant:
3M ATD Part No.8660 or equivalent
TSB Revision

II-90ENGINE - Timing Belt
(5) Install the timing belt around the intake side camshaft sprocket and fix it at indicated position by a spring typepaper clip (binder clip).
(6) Install the timing belt around the exhaust side sprocket, aligning the timing marks with the cylinder head top
surface using two wrenches.
(7) Fix the belt at indicated position by another binder clip.
(8) Install the timing belt around the idler pulley, the oil pump sprocket, the crankshaft sprocket and the ten-
sioner pulley in the order shown.
(9) Remove the two binder clips.
(1O)Lift up the tensioner pulley in the direction of arrow and
tighten the center bolt.
(11)Check to see that all timing marks are lined up. (12)Remove
the screwdriver inserted and fit the plug.
(13)Give the crankshaft a quarter counter-clockwise turn.
Then, turn it clockwise until the timing marks are lined up again.
1 TSB Revision

ENGINE - Timing Belt11-91
J
Tensioner armTensioner arm
TSB Revision
. ADJUSTMENT OF TIMING BELT TENSION
(1) After turning the crankshaft
l/4 turn counterclockwise,
turn it clockwise to move the No. 1 cylinder to top dead
center.
(2) Loosen the center bolt, and then, as shown in the illustration, attach the special tool and a torque wrench
and apply a torque of 2.6-2.8 Nm (1.88-2.03

ft.lbs.). If
the body interferes with the special tool and the torque
wrench, use a jack to slightly raise the engine assembly.
NOTE
Use a torque wrench that is capable of measurement
within a range of 0- 3 Nm (0- 2.2 ftlbs.).
(3) Holding the tensioner pulley with the special tool and torque wrench, tighten the center bolt to specification.
(4) Screw the tool into the engine left support bracket until its end makes contact with the tensioner arm. At that
point, screw the tool in some more and then remove the
set wire attached to the auto tensioner.
(5) Remove the tool.
(6) Rotate the crankshaft two complete turns clockwise and leave it as is for about 15 minutes. Then, measure
the auto tensioner protrusion “A” (distance between
the tensioner arm and auto tensioner body) to ensure
that it is up to specification.
Standard value: 3.8-4.5 mm
(.15-.I8 in.)
If it is out of specification, repeat steps (6) through (11)
until the specified value is obtained.
(7) If the clearance between the tensioner arm and the auto tensioner body cannot be measured (when the
engine is being mounted, etc.), the following proce-
dures can be used to substitute for the ordinary method
of measurement.
@j Screw in
the tool until it
contacts the tensioner arm.
@From that point of contact, further screw in the tool.
screwing it in
until the push
rod
of the auto
tensioner body is caused to move backward and the
tensioner arm contacts the auto tensioner body.
Check to be sure that the amount that the tool has
been screwed in (when the push rod moves back-
ward) is the standard value.
Standard value:
2.5- 3 turns

13-1
FUEL
CONTENTSM’ISAA--
AUTO-CRUISE CONTROL SYSTEM.............
.
332
AUTO-CRUISE CONTROL ............................. 408
SERVICE ADJUSTMENT PROCEDURES .................397
Accelerator Cables
inspectron and Adjustment ........
.
398 Auto-cruise
Control System Inspection
..............397
Individual Parts Inspection ......................
401SPECfAL
TOOLS
.....................................
333
SPECIFICATIONS .................................... 332
TROUBLESHOOTING ................................. 334
Auto-cruise Control Components Location ..........368
Auto-cruise Control
Related Harnesses
..........365
Check Chart ................339
Check Chart ..............354
Circuit Diagram ................................
371input Checking................................
.
366
On-board Diagnostic Checking ......................
361Troubleshooting Quick-reference Chart
.........................
.
334
Troubleshooting Quick-reference Chart ............................. 350
ENGINE CONTROL...............................
.
328
ENGINE CONTROL ..................................
330
SERVICE ADJUSTMENT PROCEDURES .................329
Accelerator Cable inspectron and Adjustment
...........329
Accelerator Switch Inspection and Adjustment ..........329
SPECIFICATIONS ....................................
328
TROUBLESHOOTlNG................................
.
328
Accelerator
Cable and Accelerator Pedal .............
.
328
FUEL SYSTEM ........................196
FUEL FILTER .........................................
327
FUEL LINE AND VAPOR LINE
...............
.
326
FUEL LINE AND VAPOR LINE
...............
.
324
FUEL TANK
...............................
.
322
FUELTANK ...............................
.
318
GENERAL INFORMATION ............................ 196
ON-VEHICLE INSPECTION OF MFI
COMPONENTS
......251
Air Conditioning Switch and A/C Compressor Clutch Relay .....................................
285
Barometric Pressure Sensor .................... 266
Boost Meter .............................
311Camshaft Position Sensor ........................
.
277Closed Throttle Position Switch
.....................
.
274
Component Location .............................
251Components Inspection Pocedure
................. 255
Crankshaft Position Sensor ..................... 280EGR
Solenord
...................
.
307EGR Temperature Sensor
.............
.
288Engrne Control Module Power Ground
................
.
257
Engine Coolant Temperature Sensor ..................
268Evaporative Emission Purge Solenoid .................
.
307
Fuel Pressure Solenoid ....................
307Fuel Pressure Test...............................
.
312
Fuel Pump ...................................... 258
Heated Oxygen Sensor ............................ 290
Idle Air Control Motor (Stepper Motor) ................
238Ignition Coil and Ignition Power Transistor .............
.
302
Ignition Switch-ST .................................. 284
Ignition Switch-ST and Park/Neutral Position Switch .....284
Injectors .......................................
295Inspection of Engine Control Module Terminal
Voltage .......................................
.
315
Intake Air Temperature Sensor .......................263
Knock Sensor .............287
Power Steering Pressure Switch ......................
284Power Supply and Ignition Switch ...................
.
255Resistor
..............................
.
298Terminal Voltage Check Chart
......................
.
315Throttle Position Sensor
..........................
.
270Turbocharger Waste Gate Solenoid
.........
.
309 Vehicle
Speed Sensor
............................... 284
Volume Air Flow Sensor ............................
261SERVICE ADJUSTMENT PROCEDURES ...............
.
245
Basic
idle Speed Adjustment .......................
.
245
Closed Throttle Position Switch (Fixed
SAS)Adjustment ......................................
.
250
Curb
Idle Speed Inspection
..........................245Throttle Body (Throttle Valve Area) Cleaning
...........
.
248Throttle Position Sensor Adjustment
..................
.
248
SPECIALTOOLS...................................
.
204
SPECIFICATIONS ...................................
201TROUBLESHOOTING ...............................
.
205
Check Engine/Malfunction Indicator Lamp ..............205
Circuit Diagram .................................... 214
Clear Memory of Diagnostic Trouble Code .............
211Explanation and Precaution Related to Harness
Checking ......................................
.
205Explanation of Troubleshooting Procedures
............
.
205Failsafe/Back-up Functions List
.....................
.
211Fuel tank and Fuel Line
............................
.
244
Read Out Diagnostic Trouble Code ...................
211Troubleshooting Table
.............................
.
208(CONTINUED ON NEXT PAGE)

13-2
FUEL SYSTEM VALVE>
..........
FUEL FILTER ....................................
FUEL LINE AND VAPOR LINE .....................FUELTANK....................................
.
GENERAL INFORMATION ........................
ON-VEHICLE INSPECTION OF MFI
COMPONENTS . .
Air
Conditionrng Switch and A/C CompressorClutch Relay ......
.
.............
Barometric Pressure Sensor .........
Camshaft Position Sensor ...........
Closed Throttle Position Switch ...........
Component Location .............
Components
Inspectron Procedure .......
.
Crankshaft Positron Sensor ............
EGR Solenoid ......
. . .3. .
115..,.113
. 109
. . 3
. . . 38
83
536961384173101EGR Temperature Sensor .........
.
85
Enqine Control Module Power Ground ......
.
....
45
Engine Coolant Temperature Sensor ...............
55Evaporative Emission Purge Solenord..............
.
99
Fuel Pressure ...............................
102Fuel Pump
...................................
.
46
Idle Speed Control Motor (DC Motor) ................
.
93
Idle Speed Control Motor Positron Sensor ............
.
64
lgnitron Co11 and Ignition Power Transistor .........
.
96
Ignition Switch-ST ..........................
77Ignition Switch-ST and Park/Neutral Position Switch
...78
Injectors..................................
.
90
Inspection of
Engrne Control Module Terminal
Voltage .........
.
..........................
105Intake Air Temperature Sensor ..................
.
51Oxygen Sensor
............................
.
87Power Steering Pressure Switch
..................
.
81Power Supply
.........................
.
42
Terminal Voltage Check Chart ......................
106Throttle Positron Sensor.....................
.
57Vehicle Speed Sensor
.........................
.
80
Volume Air Flow Sensor .........................
49
SERVICE ADJUSTMENT PROCEDURES .................
32
Basic
Idle Speed Adjustment ...................
.
33
Curb Idle Speed Inspection ..........................
32Throttle Body (Throttle Valve Area) Cleaning........
.
35
Throttle Positron Sensor Adjustment ................
35
SPECIAL TOOLS 7
.................
...................
SPECIFICATIONS ....................................
5
TROUBLESHOOTING .................................
8
Check Engine/Malfunction Indicator Lamp ..............
10Crrcuit Diagram.................................
.
20
Clear Memory of Diagnostic Trouble Code ............
17Explanation and Precaution Related to HarnessChecking......................................
.
9Explanation of Troubleshooting Procedures
...........
.
8
Failsafe/Back-up Functions List ....................
16Fuel Tank and Fuel Lrne.........................
.
32Read Out of Diagnostic Trouble Code
...............
.
16Troubleshooting Table
.........................
.
13
FUEL SYSTEM VALVE> ...........
116
FUEL FILTER .......................................
195
FUEL LINE AND VAPOR LINE ........................
195
FUEL TANK ........................................ 195
GENERAL INFORMATION ............................
116
ON-VEHICLE INSPECTION OF MFI
COMPONENTS
Air Conditioning Switch and A/C Compressor Clutch Relay .............................
Barometric Pressure Sensor .................
Camshaft Position Sensor ....................
Closed Throttle Position Switch ................
Component Location .......................
Components Inspectron Pocedure
..............
Crankshaft Position Sensor .................
EGR Solenoid
.................
EGR Temperature Sensor .......
Engine Control Module Power Ground ..........
Engine Coolant Temperature Sensor .............
Evaporative Emission Purge Solenoid ............
Fuel Pressure Test ...........................
Fuel Pump ..................................
IAC Valve Positon Sensor
......................
Idle Air Control Motor (DC Motor) ..............
lgnrtion Coil and Ignition Power Transistor
.......
.
Ignition Switch-ST ...........................
Ignition Switch-ST and Park/Neutral Position Switch
Injectors ....................................
Inspection of Engine Control Module Terminal
Voltage .....................................
Intake Air Temperature Sensor .................
Oxygen Sensor .............................
Power Steering Pressure
Swatch..............
.
Power Supply ...............................
Terminal Voltage Check Chart ..................
Throttle Position Sensor .......................
Vehicle Speed Sensor ......................... . . . . 139
176
154
165
16013914216
7
..,_ 191177146
155
189192
147
162
184
186
171172181
192152
179
175
143
192
157
173
Volume Air Flow Sensor ...........................
.
150
SERVICE ADJUSTMENT PROCEDURES
...............
.
133
Basic Idle Speed Adjustment 133
Closed Throttle Position Switch and Throttle Position
Sensor Adjustment .................................
136Curb Idle Speed Inspection
.........................
.
133Fixed SAS Adjustment
.............................
.
138Throttle Body (Throttle Valve Area) Cleaning
...........
.
136
SPECIAL TOOLS
...................................
.
119
SPECIFICATIONS 118
.... ..............................
TROUBLESHOOTING ..................
.............
119
Check Engine/Malfunction Indicator Lamp ..............
120Circuit Diagram...................................
.
128Clear Memory of Diagnostic Trouble Code
............
.
126Explanation and Precaution Related to Harness
Checking ........................................
.
119Explanation of Troubleshooting Procedures
............
.
119Failsafe/Back-up
Fuctions List
........................
126
Fuel Tank and Fuel Line .............................
133Read Out of Diagnostic Trouble Code ................
.
126
Troubleshooting Table ..............................
123

FUEL SYSTEM - General Information13-3
FUEL SYSTEM
GENERAL INFORMATION
MFI SYSTEM DIAGRAM

*1 Oxygen sensor
*2
Volume air flow sensor *3
Intake air temperature
sensor *4
Engine coolant tempera-
ture sensor *5
Throttle position sensor *6
Closed throttle position
switch *7 Camshaft position sensor
*8
Crankshaft position sen-
sor
‘9 Idle
speed control motor
position sensor
*I 0 Barometric pressure sensor
l Ignition switch-ST
l Power supply
l Vehicle-speed sensor
l Air conditioning switch
l Park/neutral position
switch
l Power steering pressure switch
A/T: Vehicles with an automatic transaxle
()/ $%?i modul
e
Closed throttle Evaporative
position switch emission canister
ir-con.)/ \
10
Throttle position
temp. sensor Fuel tank
- =
Oxygen M13BA-
I
*I Injector~2 Idle speed control motort3 Evaporative emission
purge solenoid
l Fuel pump control
l Multiport fuelinjection relay
l A/C compresser clutch
relay
l Ignition timing control
l On-board diagnostic
output
l Check engine/mul-function indicator lamp
Fue
l
: -
I
pump
purge
solenolo Catalvtic
converter
\/ *4 Thermal vacu valve Vacuum hose color
G: Green
R: Re
d
B: Black
L: Light blue
Y: Yellow
dJJ/ U’Engine coolant temp. sensor
PCV: Positive Crankcase Ventilation
6FU1125
TSB Revision

13-4FUEL SYSTEM - General Information
*I Oxygen sensor
*2 Volume
air
flow sensor$3 Intake air temperature
sensor
*4 Engine coolant tempera-ture sensor
“5 Throttle position sensor‘6 Closed throttle position switch
*7 Camshaft position sensor*8 Crankshaft position sen-
sor
*9 Idle speed control motor position sensor “I 0
Barometric pressure
sensor
‘11 EGR temperature sensor
l Ignition switch-STl Power supply
l
Vehrcle-speed sensor
l Air conditioning switch
l Park/neutral position
switch
l Power steering pressure switchI13
Engrnecontrol module10
rl Injectort2 Idle speed control motorr3 Evaporative emission
purge solenoid
r4 EGR solenoidl Fuel pump control
(Multiport fuel
injection relay)
l A/C compresser clutchrelay0 Ignition timing control
l On-board diagnostic
output
l Check engine/muj-function indicator lamp
A/T: Vehicles
with an automatrc
transaxle
Closed throttleposition switch Evaporative
emission
/(For auto air-con.) can’ster
/ n
Vacuum hose
G: Green
R: Red
B: Black L: Light blue
Y: Yellow
erature sensor Air

filter
Fuel tank - =
Oxygen sensor
\ U /Eni coolant temp. sensor1FUO447
Crankshaft
position sensor
Camshaft
position
sensor
color
PCV: Posrtive
Crankcase
TSB Revision