ABS MITSUBISHI 3000GT 1991 User Guide

27-4
REAR AXLE - Rear Axle Hub
REAR AXLE HUB
REMOVAL AND INSTALLATION
M27MA- -
50-60Nm36 - 43 ftlbs.
200-260Nm145-188ftibs.Removal steps
4*4*1. Rear speed sensor 2. Calioer assemblv3.Brakedisc4. Hubcap
l *5. Wheel bearing nut4’6. Tongued washer7. Rear hub assembly4*8. Rear rotor 9. Rear hub unit bearing
Caution
Rear hub unit bearing cannot be disassembled.
llN0018
Pole p&e14NOlO-7
SERVICE POINTS OF REMOVALM27MBAC
1.REMOVAL OF REAR SPEED SENSOR
Caution
Be careful when handling the pole piece at the tip of thespeed sensor and the toothed edge of the rotor so as
not to damage them by striking against other parts.
2. REMOVAL OF CALIPER ASSEMBLY
Remove the caliper assembly and suspend it with a piece of
wire.
8. REMOVAL OF REAR ROTOR
CautionCare must be taken not to scratch or scar the rotor’s
toothed surface, and not to drop it.
If the rotor’s toothed surface is chipped or the rotor is
deformed, it might not be able to accurately sense the
wheel rotation speed and the system as a result mightnot perform normally.
14NOO99ITSB Revision

33A-2FRONT SUSPENSION - Specifications
SPECIFICATIONSM33CA-A
GENERAL SPECIFICATIONS
Items
Coil spring identification colorM/T: Orange x 1
ATT: Orange x 2
Shock absorber
Type
Maximum length
Compressed length
Damping force
[at 0.3 m/set. (0.984 ft./set.)]
Hydraulic, cylindricaldouble acting type
485 + 3 (19.09
f .12)335
I 3 (13.19 + .12)Hydraulic, cylindrical double acting type
485
k 3 (19.09 + .12)335 2 3 (13.19 +
.12)
150 (5.91)
NOTE*: OptionHard
: 2,650 + 360 (584 + 79)
Medium : 1,650 t 230 (363 ?I 51)
Soft : 650 f 100 (143 + 22)
Hard
: 1,200 + 170 (265 * 37)
Medium : 1 ,I 50 k 170 (253 +37)Soft :1,000 z!z 150 (220 + 33
SERVICE SPECIFICATIONSM33CB-A
Camber
Caster
Toe-inmm (in.)
Lower arm ball joint starting torque
Nm (in.lbs.)IO-22 (86-191)
Stabilizer link ball joint starting torqueNm (in.lbs.)1.7 - 3.2 (15 - 28)
Steering angle
Inner wheelTSB Revision

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
I

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

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
iTSB Revision

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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L
I
iJ
ELECTRONIC CONTROL SUSPENSION (ECS) - Specifications33B-3
Items
Shock absorber
Type
Max. lengthmm (in.)
Min. lengthmm (in.)
Strokemm (in.)
Damping force at 0.3 m/seeI.9 ft.)/sec.N (Ibs
Expansion
Hard
Medium
Soft
Contraction
Hard
Medium
Soft
Stabilizer bar
Mounting method
Outside dia.
mm (in.)FWD
IAWDI
Hydraulic, cylindrical double-acting type
515(20.3)610(24.0)
356(14.0)407(16.0)
159
(6.3)203(8.0)
1,800(397)
1,200(265)
550(121)
950(209)
850(187)
850(143)
10 (.37)
Pillow ball type
M33CB-B~SERVICE SPECIFICATIONS
Rear suspension1'FWDItemsFront suspension
Standard value
Camber0” + 30’0”
k 30’- O”10’ Ik 30’
Caster3”55’ t 30’
Toe-inmm(in.)0+3(0f.12).522.5(.02+.I).5k2.5
SPECIAL TOOLS
ToolNumber
MB991 341
Name
Multi-use tester
sub-assembly
MB991 359ROM packM33DA-B
Use
Inspection of electronic control suspension
system
l Reading and erasing self-diagnosis codesl Reading service datal Actuator testTSB Revision

33B-8ELECTRONIC CONTROL SUSPENSION (ECS) - Troubleshooting
III
1 4 1 When diagnosis code Nos. 61, 62, 63 and 64 are output.
(-yesUsing MUT, check actuator. (Referto P.33B-15.) Good?
No
Remove cap at top of shock absorber
associated with diagnosis code No.,
disconnect connector directly
connected to shock absorber, and
checkharness connector with
ignition switch at ON.r
~...- NoNo. 1 and 3 terminal voltages upto specification?Standard: 5 V
YesIs continuity provided across the following areas of shock
Lsorber associated with diagnosis code No.?Between shock absorbers and ECS control unit
Between No. 1 and 7 terminals of F.R. shock absorber
Between No. 3 and 6 terminals of F.R. shock absorber
Between No. 1 and
10 terminals of F.L. shock absorber
Between No. 3 and 9 terminals of F.L. shock absorber
Between No. 1 and 13 terminals of R.R. shock absorber
Between No. 3 and 12 terminals of R.R. shock absorber
Between No. 1 and 16 terminals of R.L. shock absorber
Between No. 3 and 15 terminals of R.L. shock absorber1
YesNo
””
Is continuity provided between
rTi”’
Correct harness (between No. 2 and 4 terminals of shockabsorber and ground).No. 2 and 4 terminals and ground?
age, force-drive actuator by MUT. IsStandard: 9 V during forced drive
Yes
+Is continuity provided across the following areas of shockabsorber associated with diagnosis code No.?
shock absorbers and ECS control unit
Between No. 5 and 5 terminals of F.R. shock absorber
No. 5 and 8 terminals of F.L. shock absorber
No. 5 and 11 terminals of R.R. shock absorber
No. 5 and 14 terminals of R.L. shock absorber
I
YesNo
Is trouble corrected by replacingshock absorber (including dampingforce changeover actuator and POSI-tion detection switch) associated
Yes
1
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Service AdjustmentELECTRONIC CONTROL SUSPENSION (ECS) - Procedures33B-13Fail Safe and Diagnosis List
Output Code
Diagnosis Item
Fail SafeCode No.Indication Pattern
0[Good]
[Good]
l-l
11G sensor defective*l Ride controls (pinching and bouncingcontrol, bad road detection control) sl:op.
21Steering angularvelocity sensor open-circuited*
l Anti-roll control stops.
24Vehicle speed sensor*nn open-crrcurtedl Steering stability controls (anti-roll, high
speed sensitive controls) and attitude
controls (anti-dive, anti-squat) stop.l Shock absorber damping force fixed MEDIUM
F. L. damping forcefl-~-~-j 11c$i;z;;Fr actuator
R. R. damping force
I /
64 j-jMJ-~-~-~ ~t$ec~Z$rn&ftYrrZ& /
NOTE(1)Control stop, warning indication and fixed damping force return to normal when the ignition switch is set to OFF.
When any of the problems marked* occurs, if no subsequent problem occurs (for example, when the problem IStransient) normal operation will be restored even if the ignition switch is not set to OFF.(2)Even if control stop warning indication and fixed damping force return to normal as described above, the
self-diagnosis code’is stored in the memory in the ECS control unrt.
(3)The self-diagnosis code can be force-cleared by use of the MUT or by stopping the power supply to the ECS controlunit. In addition
it is automatically cleared if the ON/OFF control of the ignition swatch is repeated 60 times after the
self-diagnosis code has been output, provided that no new self-diagnosis code is output during the period.TSB Revision

I,
ELECTRONIC CONTROL SUSPENSION (ECS) - ;;~i%:~ustment339-15
Item No.Check
PointCheck ConditionSoundness Determination Value
24
Check by actually operating
vehicle.Speedometer indication and
MUT indication coincide.
26
61
62
63
64Vehicle
speed
sensorstop
lightswitch
F.R.actuator
F.L.actuator
R.R.actuator
R.L.actuatorDepress brake pedal.
ON
Do not depress brake pedal.OFF
Tour mode with vehicle stationarySOFT
Sport mode with vehicle stationaryHARD
Tour mode with vehicle stationarySOFT
Sport mode with vehicle stationaryHARD
Tour mode with vehicle stationarySOFT
Sport mode with vehicle stationaryHARD
Tour mode with vehicle stationarySOFT
Sport mode with vehicle stationaryHARD4. ACTUATOR CHECK
(I) Using the MUT, force-drive the actuator and fix the damping force changeover.
(2) Check service data (Item No. 61 through 64) to verify that the actuator has been force-driven.
NOTE
lAll of the four actuators in the shock absorbers are simultaneously changed over by forced drive.
lThe damping force changed over and fixed by forced drive is cleared by the following three conditions.1. Ignition switch OFF
2. Vehicle speed 3 km/h (1.9 mph) or more
3. MUT disconnected
Actuator Check List
Item No.Check Point
Check ConditionMUT Service Data Item
No. 61 - 64 Indicated
01Damping force SOFT
03Damping force MEDIUM
04Damping force HARD
Vehicle in stationary
conditionSOFT
MEDIUM
HARD
i
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