1991 MITSUBISHI 3000GT Service Manual

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.

33A-10FRONT SUSPENSION - Stabilizer Bar
STABILIZER BAR
REMOVAL AND INSTALLATION
Pre-removal and Post-installation Operationl Removal and installation of the Front Exhaust Pipe
(Refer to GROUP 15 - Exhaust Pipe and Main Muffler.)l Removal and Installation of the Under Coverl Removal and installation of the Left Member and Right
Member (Refer to GROUP 32 - Right Member, Left
Member and Crossmember.)
3626 ft.lbs.Removal steps
1. Tr&smission stay B*I* l a2. Transfer (AWD)(Refer to GROUP 22 -Transfer.)
3. Stabilizer link
4. Stabilizer bar bracket mounting bolt
l +5. Stabilizer bar bracket
6. Bushing
7. Stabilizer bar
M33TA- -
6
40 Nm29 ftlbs.
I-12L0217
INSPECTIONM33TCAJ
l Check the bushing for wear and deterioration.
l Check the stabilizer bar for deterioration or damage.
l Check the stabilizer link ball joint dust cover for cracks.
l Check all bolts for condition and straightness.
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FRONT SUSPENSION - Stabilizer Bar33A-11CHECKING STABILIZER LINK BALL JOINT STARTING
TORQUE
12LO24412LO217
Tapeeke
12PO156
Clip ring ends
(Could be on 180”
opposite side)1280252
Align end of bushinwith marking outerMount two nuts on the ball joint, and then measure the ball
joint starting torque.
Standard value: 1.7
- 3.2 Nm (15 - 28 in.lbs.)
BALL JOINT DUST SHIELD REPLACEMENTM33TEAF(1) Remove the clip ring and the dust shield.
(2) Apply multipurpose grease to the lip and inside of the dust
shield.
(3) Use vinyl tape to tape the stabilizer link where shown in the
illustration, and then install the dust shield to the stabilizer
link.(4) Secure the dust shield by the clip link.
At this time, make sure that the clip ring ends are located ata point 90”
? 20” with reference to the link axis.
SERVICE POINT OF INSTALLATIONM33TOAO
5. POSITIONING OF STABILIZER BAR BRACKET
(1) Align the bushing (LH) with the stabilizer bar markingend and temporarily tighten the stabilizer bar bracket
U-0.
(2) In this condition, mount the stabilizer bar bracket (RH)and temporarily tighten it.
(3) Temporarily fix the both ends of the stabilizer bar to the
link and tighten the stabilizer bar bracket mounting bolts
to specification:
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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-2ELECTRONIC CONTROL SUSPENSION (ECS) - Specifications
SPECIFICATIONS
GENERAL SPECIFICATIONS
FRONT SUSPENSION
M33CA-B
Coil spring
Effective No. of coils
14.8x170x322.515.0 x 170x331.015.7x170x301.5(.58 x 6.69 x 12.70)(.59 x 6.69 x 13.03)(.62 x 6.69 x 11.87)
Shock absorber
TypeHydraulic, cylindrical double-acting type
485 (19.1)
335 (13.2)
150 (5.9)
Expansion
Hard
Medium
Soft
Contraction
Hard
2,650 (584)
1,650 (364)
.650 (143)
1,200 (265)Pillow ball type
REAR SUSPENSION
ItemsIFWDIAWDI
Suspension systemMulti-link typeDouble-wishbone type
Coil spring
Wire dia. x center dia. x
free lengthmm (in.)
Effective No. of coils(color coded)
12.2x105x350.0(48 x 4.13 x 13.78)
5.5 (orange x 1)12.2x105x379.3(48 x 4.13 x 14.93)
6.8 (blue x 2)
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