wheel MITSUBISHI 3000GT 1991 Owner's Guide

FUEL SYSTEM - On-vehicle .lnspection of MPI Components13-111
INSPECTIONUsing Multi-use Tester
FunctionItem No. Data display
Data reading 45
Stepper
1
motor steps
~
Check condition
l Engine coolant tem-
perature: 80 to 95°C
(176 to 205°F)
0 Lamps, electric cooling
fan, accessory units:
All OFFl Transaxle: Neutral(P range for vehiclewith AA>l Steering wheel: Neutrall Idle position switch: ON(compressor clutch
to be ON if air condi-
tioner switch is ON)l Engine: idling
Load stateStandard value
;;rnditioner switch:2 - 12 stp&conditioner switch:
25 - 65 stp
l $irNconditioner switch:15 - 63 stp0 Selector lever:Shift to D range
NOTEWhen the vehicle is new [within initial operation of about 500 km (300 miles)], the stepper motor steps may be about 30steps more than standard.
CautionWhen the selector lever is shifted to the “D”range, the brakes must be used to prevent the vehicle frommovingforward.
03A020
Using Oscilloscope(1) Connect the probe to each oscilloscope pick-up point as
shown in the circuit diagram.
(2) Start the engine.
(3) When the air conditioner switch is turned on, the idling
speed increases to operate the idle speed control. Check
the instantaneous waveform.
NOTEKeep in mind that the waveform can be observed only
when idle speed control is in operation.
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INTAKE AND EXHAUST - Turbocharger (Front)15-19
05FOO2(
SERVICE POINTS OF REMOVALM15LBAE
19. REMOVAL OF OXYGEN SENSORDisconnect the connector of the oxygen sensor, and install
the special tool to the oxygen sensor.
25. DISCONNECTION OF AIR CONDITIONER COMPRES-
SORDisconnect air conditioner compressor with hoses from the
bracket.
NOTEThe removed air conditioner compressor should be fas-
tened (by using rope, etc.) in a position that will not interfere
with the removal/installation of the turbocharger assembly.
INSPECTION
TURBOCHARGER ASSEMBLY CHECKMlSLCADl
lVisually check the turbine wheel and the compressor wheel
for cracking or other damage.
l Check whether the turbine wheel and the compressor
wheel can be easily turned by hand.
l Check for oil leakage from the turbocharger assembly.
lCheck whether or not the waste gate valve remains open. If
any problem is found, replace the part after disassembly.
OIL PIPE AND OIL-RETURN PIPE CHECKCheck the oil pipe and oil-return pipe for clogging, bending, or
other damage.
If there is clogging, clean it.
SERVICE POINTS OF INSTALLATIONMllLDAE
24. INSTALLATION OF TURBOCHARGER ASSEMBLYClean the alignment surfaces shown in the illustration.
Supply clean engine oil through the oil pipe installation hole
of the turbocharger assembly.
CautionWhen cleaning, care must be taken so that a piece of
the gasket does not enter the oil passage hole.
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INTAKE AND EXHAUST - Turbocharger (Rear)
0
Comrxessorwheel \u ~i, rOlR0182
I05FOO19
SERVICE POINT OF REMOVALM15LBAF
10. REMOVAL OF OXYGEN SENSOR
Disconnect the connector of the oxygen sensor, and install
’the special tool to the oxygen sensor.
d,
INSPECTION
TURBOCHARGER ASSEMBLY CHECK
M15LCADZ
lVisually check the turbine wheel and the compressor wheel
for cracking or other damage.
l Check whether the turbine wheel and the compressor
wheel can be
easily.turned by hand.
l Check for oil leakage from the turbocharger assembly.
lCheck whether or not the waste gate valve remains open. If
any problem is found, replace the part after disassembly.
OIL PIPE AND OIL-RETURN PIPE CHECKCheck the oil pipe and oil-return pipe for clogging, bending, or
other damage.
If there is clogging, clean it.
SERVICE POINTS OF INSTALLATIONMlBLDAF
23. INSTALLATION OF TURBOCHARGER ASSEMBLYClean the alignment surfaces shown in the illustration.
CautionWhen cleaning, care must be taken so that a piece of
the gasket does not enter the oil passage hole.
14. INSTALLATION OF OIL PIPESupply clean engine oil through the oil pipe installation hole
of the turbocharger assembly.
10. INSTALLATION OF OXYGEN SENSORUse the special tool to install the oxygen sensor.
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INTAKE AND EXHAUST - Turbocharger
INSPECTION
TURBOCHARGER
15-25MllLGAB
(I) Manually open and close the waste gate valve to make sure
it operates freely.
(2)Inspect the oil passage in the cartridge for signs of deposits
or blockage.
(3) Clean the inlet section of the compressor cover with a rag.
Inspect it for signs of contact with the compressor turbine.
If worn, replace it.
L/
O-ring
3EN23C3062
snap ring Chamfered
.
v cartr~d~om,,ir
,jFcover
WI61 NO070
SERVICE POINTS OF REASSEMBLYM15LHAC7. INSTALLATION OF O-RING
Coat the inner surface of a new O-ring with a thin film of
engine oil, and set it in the groove of the cartridge
assembly.
Caution
Be careful not to damage the O-ring while installing itas oil leakage could result.
6. INSTALLATION OF CARTRIDGE ASSEMBLY
(1) Coat the outer circumference of the cartridge assembly
O-ring with a thin film of engine oil.
(2) Install the cartridge assembly on the compressor cover
by aligning the dowel pin.
CautionWhen installing the cartridge assembly on the
compressor cover, be careful not to damage the
compressor wheel blades.5. INSTALLATION OF SNAP RING
Place the cartridge assembly with the compressor cover
faced down and install the snap ring.
Caution
Install the snap ring with the tapered side of its outsidediameter up.
TSB Revision4. INSTALLATION OF TURBINE HOUSING
Install the compressor cover and cartridge assembly on the
turbine housing with the dowel pin in alignment.
Caution
1.Be careful not to damage the blades of the turbine
wheel.2. Be careful to install the turbine housing in the
correct direction.

CLUTCH - Specifications / Troubleshooting21-3
LUBRICANTS
Items
Contact surface of release bearing and fulcrum of
clutch release forkSpecified lubricants
MITSUBISHI genuine grease
Part No.0101 011 or equivalent
Inner surface of clutch release bearing
Inner surface of clutch disc spline
Contact portion of release fork to release cylinder push rod
Clutch fluid
Inner surface of clutch release cylinder and outer
circumference of piston and cup
Inner surface of clutch master cylinder and outer
circumference of piston assembly
Conforming to DOT3
SEALANTM21CE. -
Items
Thread part fittingSpecified sealant
3M ADT Part No. 8660 or equivalent
TROUBLESHOOTINGtvl21EAAM
Symptom
Clutch slips
Gear shifting
failureProbable cause
Clutch pedal play too small
Excessive wear of clutch disc facing
Hardened clutch disc facing or oil on facing
Clutch release fork not operating smoothly
Settled or damaged diaphragm spring
Clogged hydraulic system
Poorly adjusted clutch booster push rod
Clutch pedal play too large
Large clutch disc distortion or runout
Worn clutch cover assembly
Worn or corroded clutch disc splines
Separated clutch disc facing
Worn clutch release bearing
Damaged pressure plate or flywheel
Leaky or clogged hydraulic system or air
trapped in hydraulic system
Poorly adjusted clutch booster push rod
Remedy
Adjust
Replace
Replace
Repair or replace
Replace
Repair or replace
Adjust
Adjust
Replace
Replace
Replace
Replace
Replace
Replace
Repair or replace
AdjustTSB Revision

a-10CLUTCH - Clutch Control
CLUTCH CONTROL
REMOVAL AND INSTALLATIONMZlJA-
-
03% J 2’ti
m
I.“0050I
Pre-removal Operationl Draining of the Clutch Fluid
l Bleeding of the Clutch Line (Refer to P.21-7.)l Adjustment of Clutch Pedal (Refer to P.21-5.)Clutch master cylinder removalstep
1. Brake booster(Refer to GROUP 35 - Brake Booster.)2. Clevis pin 3. Clutch master cylinderl *Adjustment of piston to push rod clearance
4. Sealer3

9
Cluch tube
1.
**5.
6.
l +7.**8.9.IO.11.
a* l * 12.
\Gk
6
removal steps
Brake booster15Nm
-11 ft.lbs.
(Refer to GROUP 35
- Brake Booster.)Air hose A Air cleaner cover, air intake hose cFWD>.Air cleaner cover, air intake hose A Vacuum pipe Battery
Battery seat, washer tank
Steering column assembly
(Refer to GROUP 37A- Steering Wheel and
Shaft.)
Clutch tube15 Nm
11
ft.lbs.
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CLUTCH - Clutch Cover and Disc
6CLOl f
Lubricant: MITSUBISHI genuine grease
Part No. 0101011 or equivalent
7CLOOO8
Lubricant: MITSUBISHI genuine grease
Part No. 0101011 or eauivalent
6CL03:
Lubricant: MITSUBISHI genuine greasePart No. 0101011 or equivalent
SERVICE POINTS OF REMOVALMZlGBAK
1.REMOVAL OF CLUTCH COVER ASSEMBLY / 2. CLUTCH
DISCDiagonally loosen bolts which attach clutch cover to
flywheel. Back off bolts in succession, one or two turns at a
time, to avoid bending cover flange.
CautionDO NOT clean clutch disc or release bearing with
d
cleaning solvent.TSB Revision
1

21-22CLUTCH - Clutch Cover and Disc
APPLYgrease
6CLOlE
lir#LClutch disc
Clutch cover
assembly
v-l6CL02EITSB Revision
SERVICE POINTS OF INSTALLATIONMZIGDAU5. APPLICATION OF GREASE TO RELEASE FORK
(1) Apply a coating of the specified grease to the point of
contact with the fulcrum and the point of contact
withthe release bearing.
Specified grease: MITSUBISHI genuine grease
Part No. 0101011 or equivalent
CautionWhen installing the clutch, apply grease to each
part, but be careful not to apply excessive grease;excessive grease will cause clutch slippage and
shudder.(2) Apply a coating of the specified grease to the end of the
release cylinder’s push rod and to the push rod hole in
the release fork.
Specified grease: MITSUBISHI genuine grease
Part No. 0101011 or equivalent
4.APPLICATION OF GREASE TO CLUTCH RELEASE BEAR-ING (FWD)
Pack the inner surface of the clutch release bearing and the
groove with the specified grease.
Specified grease: MITSUBISHI genuine grease
Part No. 0101011 or equivalent
2. APPLICATION OF GREASE TO CLUTCH DISC
/ 1.
CLUTCH COVER ASSEMBLY
(1) Apply a coating of the specified grease to the clutch
disc spline, and then use a brush to rub it in.
Specified grease: MITSUBISHI genuine grease
Part No. 0101011 or equivalent
(2) Using the universal clutch disc aligner, position the
clutch disc to the flywheel.
(3) Install the clutch cover assembly. Tighten the bolts a
little at a time, working in a diagonal sequence, finally
tightening them to the specified torque.I

AUTOMATIC TRANSAXLE - Troubleshooting23-33
4. Pulse generatorCheck the resistance betweenAorBterminals1and 2or3and4.agedordisconnected
iv1-Pulse generator terminalsl-2: pulse
generator A3-4 pulse
generator B
17503381I\Connect the pulse generator and
front wheels raised.
Oscilloscope waveform
With the selector lever at the “L”
position and the engine running at
1,000 rpm, check the voltagewaveform between terminals1(
1 .OOO mVp-p or higher
Noise>
iJh
171092
f\/ With the selector lever at the “L”\
position and the engine running at1,000 rpm. check the voltagewaveform between terminals 3and 4.
I
1fWWF;tf: pulse /
Correct the inst.allationcondition, or replace the
pulse generator.
L-
*
500 mVp-p or higherI
Noise
ICorrect the installationcondition. or redace theI1 pulse generator,.1
171092
*
Normal1
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AUTOMATIC TRANSAXLE - Troubleshooting23-39
//!’ 6Rear@FrontclutchpressureI
@Kickdown brakeoressure (Release)
e
OIL PRESSURE TESTS1. Completely warm up the transaxle.
2.Raise the vehicle by using a jack so that the front wheels
can be rotated.
3. Connect an engine tachometer and place it in a position
where it’s easy to see.
4. Attach the special oil-pressure gauge (MD998330-01) and
the adaptor (MD998332-01) to each oil-pressure outlet port.
When the reverse pressure is to be tested, the 3,000
kPa(400 psi) type of gauge should be used.
5. Measure the oil pressure under various conditions, and
check to be sure that the measured results are within the
standard value range shown in the “Standard oil pressure
table” below.
If the oil pressure is not within the specified range, check
and repair as described in the section “Remedial steps if oil
pressure is not normal” on the next page.
STANDARD OIL PRESSURE TABLECondtttonsStandard
011 pressurekPa (PSI)No
SelectEngme
Red&g@000E%00leverspeedGearK/D brakeWD brakeFrontRearLow-TorqueposItlollvposltlon
pressurepressurepressureclutchclutchclutchreverseconverter
(application)(release)
pressurepressurepressurebrakepressure
pressure
1Nldlmg
Neutral
360 - 4808,(51 - 6812
Dldlmg
2nd
360
- 480100-210
730 -830k(51 - 68)
(14-30)
(104 -118)
3(SWFON,
Approx.
4th
360 480
830
-900
830
900
450-650
2,500(51 - 68) (118 128)(118 128)(64 92)
(SWZFF)Approx.
3rd
360 - 480
830
900830 -900 830 - 900
830 -900830
900
450-4
650-2.500(51 - 68)
(118
128)(118 -128) (118 - 128)
(118
128)(118128)
(64-921
52
Approx.
2nd
360
- 480
830--900
830 -900
450
650
2,500
(51 - 68)
(118-128)
(118 -128)
(64-921
Approx
1 st360 480
830 -900
300-450A1.000(51 - 68)
(118 -128)I43 .-64)
Approx.
Reverse
360 480
1.6402.2401.640 2.2401.640 -2.240450-6502.500(51 - 68)(233 - 319) (233 319)(233 319)(64 ~- 921
Approx.
Reverse
360
- 4801.500(213) 1.500 (213)1.500(213)
450~-650
1,000(51 - 68)or moreor moreor more(64 - 92)NOTE
(I)
-: Indicates pressure is below 10 kPa (1.4 psi).
(2)SW-ON: OD switch in ON position.
(3)SW-OFF: OD switch in OFF position.
(4)
a: Pressure IS not standard.
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