1991 MITSUBISHI 3000GT tow

ENGINE - Piston and Connecting RodII-47
6EN0223
Side rail
Side rail end
7EN249
7EN250
ldentiftcation mark embossed
No. 1
7Barrel
weldenthcation mark
Tapered
we7EN013i
LI(7) Check that the piston moves smoothly.
8. INSTALLATION OF OIL RING
(1) Fit the oil ring spacer into the piston ring groove.
NOTEOn the side rail and the spacer, no difference exists
between the upper and the lower surfaces.
(2) Attach the side rail on the upper side. When attaching
the side rail, engage one side of the side rail with the
piston groove. If pressed with a finger, as shown in the
illustration, it should enter easily.
NOTEThe side rail may be broken like other piston rings if the
gap is opened by the ring expander.
(3) In the same procedure as Step
(2), position the side rail
on the lower side.
(4) Check that the side rail smoothly rotates in both
directions.
7.INSTALLATION OF PISTON RING No. 2 / 6. PISTON
RING No.1
(1) Using a piston ring expander, position the No.2 and
No.1 piston rings.
Identification mark: No.1
No.2
NOTE
T
T2(1) Keep in mind that Nos.1 and 2 are different in shape.
(2) Assemble the Nos.1 and 2 piston rings with the
manufacturer and size marks stamped on the side
facing upward (toward the piston top).
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11-48ENGINE - Piston and Connecting Rod
Side railNo.1
spacer slotrail
6ENO41
7EN0032
Cylindcnumbe
Stopper notch4. INSTALLATION OF PISTON, CONNECTING ROD~
ASSEMBLY
(1) Liberally coat engine oil on the circumference of the
piston, piston ring, and oil ring.
d
(2) Arrange the piston ring and oil ring gaps (side rail and
spacer) as shown in the illustration.
(3) Rotate crankshaft so that crank pin is on center of
cylinder bore.
(4) Use suitable thread protectors on connecting rod bolts
before inserting piston and connecting rod assembly
into cylinder block. Care must be taken not to nick crank
pin.(5) Using a suitable piston ring compressor tool, install
piston and connecting rod assembly into cylinder block.
Caution
Insert the pistons so that the front marks (arrows)on the piston tops point toward the front of the
engine (timing belt side).
2. INSTALLATION OF CONNECTING ROD CAP
(1) Install the connecting rod, aligning it with the mark
made or the connecting rod cap during disassembly.
When the connecting rod being installed is new and has
no alignment mark, install it so that the notches in the
connecting rod and cap are on the same side, as
illustrated.
‘d(2) Check the connecting rod big end thrust clearance.
Standard value: 0.10
- 0.25 mm (.0039 -‘.0098 in.)
Limit: 0.4 mm
(-016 in.)
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13-14FUEL SYSTEM - Troubleshooting
routput
preference
order
7Diannosis item
Diagnosis code
IOutput signal patternNo.
36
39
121 Ignition timing
adjustment signalH
L
13Oxygen sensor ’(Turbo: Front bank)HRetainedl Harness and connectorl Oxygen sensorl Fuel pressurel Injectors (Replaceif defective)l Intake air leaks
Retained
l Harness and connectorl Injector coil resistance
5
I--
Injector12AOlO!
:nnnn
EGR
12A0105
14
41
Retainedl Harness and connectorl EGR thermo-sensorl EGRvalvel EGR control solenoidvalvel EGR valve controlvacuum
Retainedl Harness and connectorl Ignition coill Power transistor unit
16
lqnition coil,
12A0105
52power transistor unitINO. 2-5 cylinder)H
Lu Lnll
‘qnition coil.
12AO105
18Retainedl Harness and connectorl Ignition coill Power transistor unit
Retainedl Harness and connector(If harness and connector
are normal, replace only
transaxle control unit.)
Retainedl Harness and connector(If harness, connector
and induction control
valve are normal,
replace air intake
plenum assembly.)
--
Tower transistor unitH‘NO. 3-6 cylinder)
Ln
12A0105
A cable from trans-
axle control unit,Hfor transmission
of torque reductionLUUUUUI n
signal 12A0105
Induction control
valve position
61
62
sensorHLuutJvL
12A0105
Normal stateH-
NOTE-Replace the engine control unit if a malfunction code is output although the inspection reveals that there is no problem with the check
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13-180CRUISE CONTROL SYSTEM - Service Adjustment Procedures.
4
ET: ON
07FOOl;Control switch
\E: ON
t
07FOOliControl switch
\
SET: ON
07FOOlControl switch
\
07FOOl
CRUISE CONTROL SETTING CHECK(1) Switch ON the main switch.
(2) Drive at the desired speed within the range of approximate-
ly 40
- 145 km/h (25 - 90 mph).
(3) Operate the control switch downward. (SET switch: ON)
(4) Check to be sure that the speed is the desired constant
speed when the switch is released, and also check to be
sure that the CRUISE indicator light (within the combination
meter) illuminates.
NOTEIf the vehicle speed decreases to approximately 15 km/h (9
mph) below the set speed, because of climbing a hill for
example, the cruise control will be cancelled.
SPEED-INCREASE SETTING CHECK(1) Set to the desired speed.
(2) Operate the control switch upward. (RESUME switch: ON)
(3) Check to be sure that acceleration continues while the
switch is hold, and that when it is released the constant.
speed at the time when it was released becomes the
driving speed.
NOTEEven if, during acceleration, the vehicle speed reaches or
exceeds the high limit [approximately 145 km/h (90 mph)],
acceleration will continue, however, when the switch is
released, the set speed (“memorized speed”) will become
the high limit of the vehicle speed.
SPEED REDUCTION SETTING CHECK(1) Set to the desired speed.
(2) Operate the control switch downward. (SET switch: ON)
(3) Check to be sure that deceleration continues while the
switch is held, and that when it is released the constant
speed at the time when it was released becomes the
driving speed.
NOTEWhen the vehicle speed reaches the low limit [approx-
imately 40 km/h (25 mph)] during deceleration, the cruise
control will be cancelled.
CRUISE CONTROL CANCELLATION AND SET SPEED RE-
SUME CHECK(1) Set cruise control.
(2) In the cruising condition of the cruise control mode, check
that when any of the following operations are performed,
the normal drive mode is restored and
,the vehicle coasts
smoothly.@ Move the control switch toward you. (CANCEL switch:@ Depress the brake pedal.@ Depress the clutch pedal.
@ Place the gear selector lever in the N range.

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13-182CRUISE CONTROL SYSTEM - Service Adjustment ProceduresI
CRUISE CONTROL SWITCH INSPECTION(1) Remove the air bag module using the following procedure.I07FOO12
07NOOl@ Remove the negative terminal of the battery and wait
for more than 30 seconds.
d
CautionThe capacitor in the SRS diagnosis unit retains
enough voltage to deploy the air bag for a given
period even after disconnection of the battery. If anoperation is performed during that given period,
unintended deployment of the air bag could result
and cause serious injury.@Remove the air bag module. To remove the clock spring
connector
(squib connector) from the air bag module,
force the lock outward and pry it with a plain screwdriv-
er as shown at left so that no undue force will be
exerted on the connector when it is removed.@ The removed air bag module should be stored in a
clean, dry, flat place with the pad side up.
(2) Disconnect the connector of the control switch and operate
the control switch to measure the resistance between the
individual terminals.
If the readings are as shown below, the control switch may
be considered good.
Switch operationResistance between-iJ
terminals
When switch is not operated
When switch is operated toward you
(CANCEL switch: ON)
When switch is operated upward
(RESUME switch: ON)
When switch is operated downward
(SET switch: ON)No continuity
Approx. 0
1RApprox. 820
1RApprox. 2,700
fi
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22-32MANUAL TRANSAXLE - Input Shaft Assembly
20105'
Damage, breakage
Damage, wearTFMOll!
Synchnizer ringGLar
TFMOll201044
/
NEEDLE BEARINGl Combine the needle bearing with the shaft or bearing
sleeve and gear and check that it rotates smoothly without
abnormal noise or play.l Check the needle bearing cage for deformation
SYNCHRONIZER RINGl Check the clutch gear teeth for damage and breakage.
l Check paper lining on cone I.D. for damage, wear, and
flaking.l Force the synchronizer ring toward the clutch gear and
check clearance “A”. Replace if it is out of specification.
Limit: 0.5 mm
(.02 in.)
SYNCHRONIZER SLEEVE AND HUBl
Combine the synchronizer sleeve and hub and check thatthey slide smoothly.
l
Check that the sleeve is free from damage at its inside front
and rear ends.
lCheck for wear of the hub end surfaces (in contact with
each speed gear).
CautionWhen replacing, replace the synchronizer hub and
sleeve as a set.
SYNCHRONIZER KEY AND SPRINGl
Check for wear of the synchronizer key center protrusion.
lCheck the spring for deterioration, deformation and break-
age.
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22-38
MANUAL TRANSAXLE - Intermediate Gear Assembly
Damage and breakage
TFMOllE
Syndhronizer ringGAarTFMOll:201045
SYNCHRONIZER RINGl Check the clutch gear teeth for damage and breakage.
l Check paper lining on cone I.D. for damage, wear, and
flaking.l Force the synchronizer ring toward the clutch gear and
check clearance “A”. Replace if it is out of specification.
Limit: 0.5 mm
(.02 in.)
SYNCHRONIZER SLEEVE AND HUB
lCombine the synchronizer sleeve and hub and check thatthey slide smoothly.
lCheck that the sleeve is free from damage at its inside front
and rear ends.
lCheck for wear of the hub end surfaces (in contact with
each speed gear).
CautionWhen replacing, replace the synchronizer hub and
sleeve as a set.
SYNCHRONIZER KEY AND SPRINGl
Check for wear of the synchronizer key center protrusion.
lCheck the spring for weakness, deformation and breakage.
SPEED GEARS
lCheck the bevel gear and clutch gear teeth for damage and
wear.l Check the synchronizer cone for rough surface, damage
and wear.
lCheck the gear bore and front and rear ends for damage
and wear.
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1

23-64
AUTOMATIC, TRANSAXLE - Transaxle Assembly
(2) Remove the nut and move the bolt so that a spanner
can be applied to the transaxle mount bracket mounting
bolt; then, remove the transaxle mount bracket mount-
ing bolt.
15. DISCONNECTION OF TIE ROD END / 16. LOWER ARM$3
BALL JOINTRefer to GROUP 22
- Manual Transaxle.
19. REMOVAL OF DRIVE SHAFT (LEFT SIDE) AND INNERSHAFT ASSEMBLY
/ 20. DRIVE SHAFT (RIGHT SIDE)
Refer to GROUP 22
- Manual Transaxle.
24. REMOVAL OF SPECIAL BOLTS
/ 25. TRANSAXLE
ASSEMBLY LOWER PART COUPLING BOLT
/ 26.
TRANSAXLE ASSEMBLY
(1) Support the transaxle assembly with the transaxle jack.
(2) ;;F;ng the crankshaft, remove the special bolts at four
(3) After removing the special bolts, push the torque
converter toward transaxle so that it does not remain on
the engine side.
(4) Remove coupling bolt at the bottom of transaxle
assembly and lower the transaxle assembly.
SERVICE POINTS OF IliSTALLATlONM23LDAD
26. INSTALLATION OF TRANSAXLE ASSEMBLYAttach the torque converter on the transaxle side and
mount the transaxle assembly on the engine.
Caution
If the torque converter is mounted first on the engine,
Idthe oil seal on the transaxle side may be damaged.
Therefore, be sure to first assemble the torque conver-ter on the transaxle side.
20. INSTALLATION OF DRIVE SHAFT (RIGHT SIDE)Refer to GROUP 22
- Manual Transaxle.
5. CONNECTION OF TRANSAXLE CONTROL CABLE
(1) Connect the transaxle control cable to the manual
control lever and tighten the nut temporarily.
(2) Loosen the nut, pull the transaxle control cable lightly in
the arrow direction and retighten the nut.
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