lock MITSUBISHI 3000GT 1991 Service Manual

27-38REAR AXLE - Differential Carrier
L
Snap ringllFOOO9
llFOOl0
11 FOO20
8-01
380
F‘/T\br -1lFOO12
(4) Using the special tool, to apply the preload, turn down
both right and left side bearing nuts on half the distancebetween centers of two neighboring holes.
\d(5) Fit the snap ring at either position shown to lock the
side bearing nut.
(6) Check the drive gear and drive pinion for tooth contact.
If poor contact is evident, make adjustment. (Refer to
P.27-28.)(7) Measure the drive gear
runout at the shoulder on the
reverse side of the drive gear.
Limit: 0.05 mm
(.002 in.)
(8) If the drive gear
runout exceeds the limit, reinstall by
changing the phase of the drive gear and differential
’
case, and remeasure.d
24. INSTALLATION OF OIL SEAL
(1) Using the special tool, install the oil seal flush with the
gear carrier end face.
(2) Apply a thin coat of Multi-purpose grease to the oil seal
lip.
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32-1
POWER PLANTMOUNT
CONTENTSMZAA- _
ENGINE MOUNTING........................................
3SPECIFICATIONS................................................2
ENGINE ROLL STOPPER
5Service Specifications....................................2....................................
TRANSAXLE MOUNTING................................4RIGHT MEMBER, LEFT MEMBER AND
CROSSMEMBER”................................................6TROUBLESHOOTING........................................2
SPECIAL TOOLSAbnormal Noise....................................................
2
Excessive Engine Wobble or Vibration
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
(1)A Supplemental Restraint System (SRS), which uses a driver-side air bag, has been installed in the 3000GT.(2)The SRS includes the following components: impact sensors, SRS diagnosis unit: SRS warning light, air bagmodule, clock spring, interconnecting wiring. Other SRS-related components (that may have to be
removed/installed in connection with SRS service or maintenance) are indicated in the table of contents byan asterisk (*).
WARNING!(1)Improper service or maintenance of any component of the SRS, or any SRS-related component, can lead to
personal injury or death to service personnel (from inadvertent firing of the air bag) or to the driver (from
rendering the SRS inoperative).
(2) Service or maintenance of any SRS component or SRS-related component must be performed only at an
authorized MITSUBISHI dealer.(3) MITSUBISHI dealer personnel must thoroughly review this manual, and especially its GROUP 52B
-Supplemental Restraint System (SRS), before beginning any service or maintenance of any component of theSRS or any SRS-related component.

POWER PLANT MOUNT -Right Member, Left Member and Crossmember32-7
L
L;Crossmember
45 Nm
r-f33 ftlbs.;13emoval steps of crossmember
lFront exhaust pipe
(Refer to GROUP 15 - Exhaust Pipe, MainMuffler and Catalytic Converter.)l Transfer
(Referto GROUP 22-Transfer.)l Stabilizer bar(Refer to GROUP 33A-Stabilizer Bar.)lSteering gear boxro:,Tr to GROUP 37A- Power Steering Gear
13. Self-locking nut
14. Clamp installation bolt (short)
15. Clamp installation bolt (long)
16. Clamp
17. Lower arm mounting bolt18. Stopper19. Rear roll stopper bracket mounting bolt20. Self-locking nut
21. Lower plate
22. Self-locking nut
23. Lower plate
24. Crossmember
25. Stopper B
26. Stopper A
27. Bushing B
28. Bushing A
NOTE*: Indicates parts which should be temporarily tightened, and
then fully tightened with the vehicle in the unladen condition.
Press out
Nut12R0121
Press fit
1MB
INSPECTIONM32YCAC
l Check the crossmember for cracks or deformation.
l Check the bushings for cracks or deterioration.
l Check the right member for cracks or deformation.
l Check the left member for cracks or deformation.
BUSHING A AND B REPLACEMENTM32YDAC
Use the special tool to remove and press in bushings A and B.TSB Revision

33A-6
FRONT SUSPENSION - Strut Assembly
DISASSEMBLY AND REASSEMBLYM33LE. -
r----
878 Nm
56 ftlbs.
Caution
When applying the grease, take care
that grease does not adhere to the
insulator’s rubber part.Disassembly stepsI.
Dust shield** l *2. Self-lockrng nut
**3. Strut insulator assembly
4. Spring upper seat assembly
5. Upper spring pad
6. Bump rubber
7. Dust shield
8. Front coil spring
9. Strut assembly
12L0254 1
SERVICE POINT OF DISASSEMBLYM33LFAI2. REMOVAL OF SELF-LOCKING NUT
(1) Holding the spring upper seat with the special tool,
loosen the self-locking nut.
CautionThe self-locking nut should be loosened only, not
removed.
(2) Using the special tools, compress the coil spring, andthen remove the self-locking nut.
NOTEInstall the special tools evenly, and so that the max-
imum length will be attained within the installation
range.

FRONT SUSPENSION - Strut Assembly33A-7
INSPECTIONM33LGAFl Check the strut insulator bearing- for wear or rust.
l Check the rubber parts for damage or deterioration.
lCheck the spring for deformation, deterioration or damage.l Check the shock absorber for deformation,
Strutmsulatkx bearing
12FOO80
SERVICE POINTS OF REASSEMBLYM33UlAM
4. INSTALLATION OF SPRING UPPER SEAT ASSEMBLY
(1) Assemble the spring upper seat to the piston rod, fitting
the notch in the rod to the shaped hole in spring seat.(2) Line up the holes in the strut assembly spring lower
seat with the hole in the spring upper seat.
NOTEThe job is easily accomplished with a pipe
[$I 8 mm x
300 mm
(4 .3 in. x 11.8 in.)].
2. INSTALLATION OF SELF-LOCKING NUT
(1) With the coil spring held compressed by the special
tools (MB991 237 and MB991 238). provisionally .tightenthe self-locking nut.
(2) Correctly align both ends of the coil spring with the
grooves in the spring seat, and then loosen the special
tools (MB991 237 and MB991 238).
(3) Using the special tool, tighten the strut insulator at the
specified torque.12FOO20
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33A-8FRONT SUSPENSION - Lower Arm
LOWER ARMMOJNA- _
REMOVAL AND INSTALLATION
100 Nm-Ts. *....
2’ /40 Nm
29 ft.lbs.Removal steps
1. Stabilizer link mounting nut (stabilizer barside)
l *
2. Stabilizer link mounting nut (lower arm side)
3. Stabilizer link
4.
Self-lockrng nut connecting lower arm ball
joint to knuckle
5. Lower arm mounting nut
6. Lower arm mounting bolt
7. Clamp mounting self-locking nut
8. Clamp mounting bolt (small)
9. Clamp mounting bolt (large)
** 10. Lower arm clamp mounting self-locking nut11. Lower arm mounting clamp
12. Lower arm
.- -NOTE
shteld
1210487
13. Stopper
14. Dust shieldFor tlghtenrng points marked with *, ftrst temporarily trghten
15. Rod bushing
them, then ground the vehicle and torque to specificationwhere the vehrcle is empty.TSR Revision

FRONT SUSPENSION - Lower Arm33A-9
MB991 113-0112R0258
12UOO18
LIPS
Dust
shield
12R0487
MB990799-01
Dust shield
Snap ring12L0295
SERVICE POINT OF REMOVALM33NBAO4. REMOVAL OF LOWER ARM BALL JOINT
Using the special tool, disconnect the knuckle from the
lower arm ball joint.
NOTE
(1) Do not remove the nut from the ball joint, but just
loosen it.
(2) Suspend the special tool with a rope to prevent it from
dropping.
INSPECTIONM33NCAFl Check the bushing for wear and deterioration.
l Check the lower arm for bend
,or breakage.
l Check the clamp for deterioration or damage.
l Check the ball joint dust shield for cracks.
l Check all bolts for condition and straightness.
CHECKING BALL JOINT FOR STARTING TORQUEMount two nuts on the ball joint, and then measure the ball
joint starting torque.
Standard value: 10
- 22 Nm (86 - 191 in.lbs.1
BALL JOINT DUST SHIELD REPLACEMENTMJBNEAH(1) Remove the dust shield.
(2) Apply multipurpose grease to the lip and inside of the dust
shield.(3)
C$Fedn the dust shield with special tool until it is fully
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SERVICE POINT OF INSTALLATIONM33NFAP
10. INSTALLATION OF LOWER ARM CLAMP MOUNTING
SELF-LOCKING NUT
Place the lower arm bushing bracket so that its mountingsurface tilts 6”
? 1” with respect to the bottom surface of
the lower arm; then, mount the self-locking nut.

33B-1
ELECTRONIC
CONTROL
SUSPENSION
CONTENTSM33AA-B
CIRCUIT DIAGRAM
22SPECIAL TOOLS........................................................................3
................................................................
DAMPING FORCE CHANGEOVERSPECIFICATIONS....................................................................2
ACTUATOR................................................................................20General Specifications.......................................................2
ECS CONTROL UNIT................................................................21Service Specifications.......................................................3
ECS INDICATOR LIGHT............................................................20STEERING ANGULAR VELOCITYa .
ECS SWITCH............................................................................
19
G SENSOR................................................................................
19
POSITION DETECTION SWITCH............................................20
SERVICE ADJUSTMENT PROCEDURES
............................
12
On-Vehicle Inspection........................................................12
SENSOR*....................................................................................-IY
STOP LIGHT SWITCH............................................................20
THROTTLE POSITION SENSOR
............................................20
TROUBLESHOOTING............................................................4
VEHICLE SPEED SENSOR....................................................
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
(I)A Supplemental Restraint System (SRS), which uses a driver-side air bag, has been installed in the 3000GT.(2)The SRS includes the following components: impact sensors, SRS diagnosis unit: SRS warning light, aiir bagmodule, clock spring, interconnecting wiring.Other SRS-related components (that may have 1:o be
removed/installed in connection with SRS service or maintenance) are indicated in the table of contents byan asterisk (*).
WARNING!(1)Improper service or maintenance of any component of the SRS, or any SRS-related component, can lead to
personal injury or death to service personnel (from inadvertent firing of the air bag) or to the driver (from
rendering the SRS inoperative).
(2) Service or maintenance of any SRS component or SRS-related component must be performed only at an
authorized MITSUBISHI dealer.(3) MITSUBISHI dealer personnel must thoroughly review this manual, and especially its GROUP
Ei2B -Supplemental Restraint System (SRS), before beginning any service or maintenance of any component of theSRS or any SRS-related component.

33B-12ELECTRONIC CONTROL SUSPENSION (EC9 - i?:~~u:‘?s*men*
12FOOOESERVICE ADJUSTMENT PROCEDURES
I
ON-VEHICLE INSPECTIONIM33FHAD1. WARNING INDICATION BY ECS INDICATOR LIGHT
If a problem associated with the following items occurs, theECS indicator light (Tour Sport) in the combination light
flashes at intervals of 0.5 sec. At the same time, the
self-diagnosis code associated with the problem is outputto the diagnosis connector.
Warning Indication Items
l G sensor
l Steering angular velocity sensor
l Vehicle speed sensor
lDamping force changeover actuator (including position
detection switch)
2. SELF-DIAGNOSIS OUTPUT CHECK
(I) Check the self-diagnosis code.
(2) After the defective portion has been repaired, erase theself-diagnosis code. (If the defective portion is not
completely repaired, it may be impossible to erase the’self-diagnosis code by the MUT.)d
(3) Perform self-diagnosis output check again and checkthat the self-diagnosis code is good.

(1) Set the ignition switch to OFF.
(2) Connect the positive (+) terminal of the voltmeter to
the No. 3 terminal of the diagnosis connector beside the
junction block and connect the negative (--) terminal ofthe voltmeter to the No. 12 terminal.
(3) Set the ignition switch to ON.
(4) Read the self-diagnosis code on the basis of the
deflection of the pointer of the voltmeter.
(5) Based on the self-diagnosis code, repair the associated
defective portion.(6) Set the ignition switch to OFF.
(7) Disconnect the battery cables from the battery termi-
nals and reconnect them more than
10 seconds
thereafter.(8) Set the ignition switch to ON, perform self-diagnosis
check again, and check that the self-diagnosis code is
good.
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339-l 6ELECTRONIC CONTROL SUSPENSION (ECS) - ;;:%,:?‘Stment5. CONTROL FUNCTION SIMULATION CHECK
Using the MUT, check all control functions during operationwith the vehicle in stationary condition.
5-1. Anti-Roll Control Function Check:d
(1) Raise the front wheels on a jack and have them supportedby rigid racks.
(2) Place the steering wheel in straight ahead position.
(3) Select the Tour mode by the ECS switch.
(4) Enter a simulated vehicle speed of 100 km/h (62 mph) fromthe MUT.
(5) Using the MUT, check the indications of service data itemsNo. 61 through 64.
MUT indication: SOFT
12FOO64(6) Turn the steering wheel clockwise or counterclockwise
from the straight ahead position.
(7) Using the MUT, check that the indications of service dataitems No. 61 through 64 change over.
Approx. 0.2 seconds for 90” rotation
(8) Check that the original damping force indication (SOFT) isrestored a second later.
5-2. Anti-Dive Control Function Check
(1) Select the Tour mode by the ECS switch.
(2) Enter a simulated vehicle speed of 100 km/h (62 mph) fromthe MUT.
(3) Using the MUT, check the indications of service data itemsNo. 61 through 64.
MUT indication: SOFT
(4) Depress the brake pedal and simultaneously change the
entered simulated vehicle speed by the MUT. (Change thespeed in 0.4 seconds after depressing the brake pedal.)
(5) Using the MUT, check that the indications of service dataitems No. 61 through 64 change over.
Changing entered simulated
vehicle speedMUT indication
100 km/h (62 mph) to 80 km/h (50 mph)HARD
(6) Check that the original damping force indication (SOFT) isrestored a second later.
Ls5-3. Anti-Squat Control Function Check
(1) Select the Tour mode by the ECS switch.
(2) Enter a simulated vehicle speed of 30 km/h (19 mph) fromthe
MUT.
(3) Using the MUT, check the indications of service data itemsNo. 61 through 64.
MUT indication: SOFT
l/i
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