1991 MITSUBISHI 3000GT wheel

FRONT SUSPENSION - Special Tools / Troubleshooting
SPECIAL TOOLS
L
L
Removalof the lower arm ball joint and
Wheel alignment
gauge attachment
Measurement of the wheel alignment
Spring compressorCompression of the front coil spring
MB990799-01Ball joint remover
and installerInstallation of the dust shield
TROUBLESHOOTINGM33EBAA
SymptomProbable causeRemedy
Steering wheel is heavy,Suspension malfunctionvibrates or pulls toBall joint
Adjust orreplace
one sideCoil springWheel alignment
Unbalanced or worn tiresAdjust or replace
Excessive vehicleBroken or deteriorated stabilizer
rollingShock absorber malfunctionReplace
Poor ridingImproper tire inflation pressureAdjust
Broken or deteriorated coil spring
Shock absorber malfunctionReplace
Inclination of vehicleBroken or deteriorated coil springReplace
NoiseLack of lubricationLubricate
Looseness and wear of each partRetighten or replace
Broken coil spring
Shock absorber malfunction
ReplaceTSB Revision
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33A-4FRONT SUSPENSION - Service Adjustment Procedures
Strut lowermounting bolt(upper)
\/
0 camber@ camber12FOO31
SERVICE ADJUSTMENT PROCEDURES
M33FBAT
FRONT WHEEL ALIGNMENT‘d
TOE-INStandard value: 0 2 3 mm (0 +
.12 in.)
1. Adjust the toe-in by undoing the clips and turning the left
and right tie rod turnbuckles by the same amount (in
opposite directions).
2.After making the adjustments, use a turning radius gauge to
confirm that the steering wheel turning angle is within thestandard value range. (Refer to GROUP 37A
- Service
Adjustment Procedures.)Standard value:
Inner wheel
33”45’Outer wheel
28”21’
CAMBER AND CASTERStandard value:
Camber0” IL 30’
Caster3”55’ IL 30’
Install the special tool by tightening it to the same torque as
that applied to the drive shaft nut.
a
To adjust camber, turn the strut lower mounting bolt (upper).
One graduation is equivalent to about 20’ in camber. Caster hasbeen factory-adjusted to the standard value and requires no
adjustment.
Caution
1.One camber graduation changes toe by about 0.5 mm
(.02 in.). Be sure to adjust toe after camber has been
adjusted.
2.The difference in camber between right and left shouldbe within
O”30’.
WHEEL BEARING ADJUSTMENTM33FCAA
Bearing preload is pre-set to the specified value by design andtherefore can not be adjusted.
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1

FRONT SUSPENSION - Strut Assembly33A-5
STRUT ASSEMBLY
IREMOVAL AND INSTALLATION
‘=Il Adjustment of Wheel Alignment
M33lA- *
6
45 Nm
2
33 ft.lbs.4!
AI$
c3liI7 // ;I jI ’II ;/ ~I: /I /j j
1
-r11Ii /’ I--‘-
Removal steps
1. Brake hose tube clamo mountina bolt
2. Brake hose tube clam;-,3. Fr;;tSs;eed sensor clamp mountmg nut
4. Front speed sensor clamp
tABS>5. Strut lower mounting bolt
6. Strut upper mounting bolt
7. ECS connector

8. Cap
9. Strut assembly
1 TSB Revision

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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ELECTRONIC CONTROL SUSPENSION (ECS)ECS Switch I Steering Angular Velocity- Sensor I G Sensor I Vehicle Speed Sensor3:3B-19
12FOO6t3INSPECTION12FOO71
i
\\12FOO72
ECS SWITCHMUZCAB
To mount or remove the ECS switch, refer to GROUP 54
-
Meters and Gauges. Remove the meter bezel before rnountingor removing the ECS switch.
Operate the switch to check for continuity between the
individual terminals.
3
ECS switchON0
OFF0IIIIII1
NOTEO-O indicates that there is continuity between the terminals.STEERING ANGULAR VELOCITY SEN-
SORM33ZHAB
To mount or remove the steering angular velocity sensor, referto GROUP 54
- Column Switch. Remove the steerilng wheel
and clock spring
*before mounting or removing the sensor.
G SENSORM33ZIAB
To mount or remove the G sensor, refer to GROUP 52A-Front
Seat. Remove the front seat
(L.H.) before removing or
mounting the sensor.
VEHICLE SPEED SENSORM33ZJAB
To mount or remove the vehicle speed sensor, refer to GROUP54
- Meters and Gauges.
INSPECTIONRefer to GROUP 54
- Meters and Gauges.
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I

ELECTRONIC CONTROL SUSPENSION (ECS) - Circuit Diaaram 33B-23
IGN:sw1::A?-m
I&
177
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3
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T-J
---
ON(IG2)SV
el
ENGINEf"BTROL
GNDIfi
1234
J333256‘78
6461 72>
I
I
CLL2c
I
,Jm4,\/\THROTTLE;;;EI;;ON
4-1
jV
f
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ss’
2
___--_--- _-- ------2354 55F
"pLl
cl w&
114 3__------ -------
I
nimCL
IGNITIONSWITCH(IG1)18Bl
NON-TURBO\
G-R
COMBI-
%kiN'(REED>
G SENSOR
lf?EzJi
STEERING
WHEEL ANGLE
SPEED SENSOR
liZI1 2 3aTSB Revision

id
REAR
SUSPE,NSlON
CONTENTSM34AA-.

REAR SUSPENSION ASSEMBLY. . . . . . . . . .._..24
SERVICE ADJUSTMENT PROCEDURES. .
23
Rear Wheel Alignment Inspection. . . . . . . . . .23
SHOCK ABSORBER ASSEMBLY. . . . . . . . . . . . .33
SPECIAL TOOLS .
.._____......_..................._.................20SPECIFICATIONS
.__............................................. 19
General Specifications. . . . . . . . . . . . . . . . . . . .19
/
id
Service Specifications.._............................... 19
STABILIZER BAR. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34TRAILING ARM
.._........_._...................................... 30
TROUBLESHOOTING
_....................................... 22
UPPER AND LOWER ARM. . . . . . . . . . . . . . . . . . . ..t..........27
REAR AXLE HUB................................................
17
REAR SUSPENSION ASSEMBLY....................7
SERVICE ADJUSTMENT PROCEDURES........5
Rear Hub Rotary-sliding Resistance
(Torque) Inspection................................................
6
Rear Wheel Alignment Inspection....................
5
Wheel Bearing End Play Inspection....................6
SHOCK ABSORBER ASSEMBLY....................13
SPECIAL TOOLS....................................................
3
SPECIFICATIONS................................................2
,General Specifications....................................2
Service Specifications....................................2
STABILIZER BAR................................................15
TRAILING ARM....................................................11ITROUBLESHOOTING
4........................................UPPER ARM, LOWER ARM AND
ASSIST LINK91........................................................
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34-2REAR SUSPENSION - Specifications
SPECIFICATIONS
GENERAL SPECIFICATIONS
Items
Suspension system
Coil spring
Wire dia. x O.D. x free lengthmm (in.)
Coil spring identification color
Spring constantN/mm (Ibs./in.)
Shock absorber
Type
Max. lengthmm (in.)
Min. lengthmm (in.)
Strokemm (in.)
Damping force [at 0.3 m/set. (.9 ftisec.)]
ExpansionN (Ibs.)
ContractionN (Ibs.)aheel
bearing
Type
Vehicles without ECSVehicles with ECS
Multi-link12X95X350
12.2x105x350(47 x 3.74 x 13.78)(.48x4.13x13.78)
Pink x 1
Orange x 1
352 1.8(196? 10.1)35+ 1.8(196+ 10.1)
Hydraulic cylindricaldouble-acting typeHydraulic cylindricaldouble-acting type
515
f 3 (20.2 i .I)515 + 3 (20.2 f .I)
356+3(14.0+.1)356 Ifr 3 (14.0 k .I)
159 (6.3)
159 (6.3)
1,000 + 150 (220 + 33)Hard: 1,800 ? 250 (397 f 55)
Medium: 1,200
rt 170 (265 + 37
Soft: 550
* 90 (121 f 20)
550_+80(121 + 18)Hard: 950 + 140 (209 k 31)
Medium: 850
* 130 (187 f 29)
Soft: 650
t- 100 (143 i 22)
Unit bail bearing
SERVICE SPECIFICATIONSM34CB.A
Items
Specifications
Standard value
Toe-in (Left-right difference)
mm (in.)
Camber
Stabilizer link ball joint starting torque
Nm (in.lbs.)
Ball joint rotation starting torque
Nm (inlbs.)
Stabilizer link protrusion
mm (in.)
Crossmember bushing projection,mm (in.)
I0.5 + 2.5
(.Ol + .09)
0” 2 30’
1.7-3.2(15-28)
2-9(17-78)
5-7(.197-,276)
8.5 - 9.5 (33 - .37)
Limit
Wheel bearing end playmm (in.)
Rear hub rotary-sliding resistance
N (Ibs.)
Rear hub rotary-sliding torqueNm (ftlbs.)0.05
(002) or less
31 (7) or less
1.8 (I .30) or lessTSB Revision