ABS MITSUBISHI 3000GT 1991 Owner's Manual

33B-18ELECTRONIC CONTROL SUSPENSION (EC9 - ~::::u:?‘s*men*
\/I
I(Front)(Rear)I
12FOOG
6. ACTUATOR OPERATION CHECKM33FJAA
6-1. Actuator Operating Sound Check
(I) Set the ignition switch to ON.
(2) Bring your ear near the top of the shock absorber.dNOTE
In the case of the rear shock absorbers, remove the trim
cover at the top of the shock absorber before bringing your
ear near the shock absorber.
(3) Check that the operating sound of the actuator in the shockabsorber can be heard each time the control modes are
changed by pressing the ECS switch.
6-2. Damping Force Check(1) Set the ignition switch to ON.
(ECS indicator Tour ON, damping force SOFT)
(2) Check the damping force SOFT state by shaking the top
mounting points of the front shock absorbers or the top ofthe rear end panels of the rear shock absorbers up and
down.
(3) Press the ECS switch to change the control mode to Sport.(ECS indicator Sport ON, damping force HARD)
(4) Shake the vehicle up and down to check that the dampingforce is harder than in the SOFT state.
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33B-20 ELECTRONIC CONTROL SUSPENSION (ECS)-llwmtk Positkm .semor I stop tight switch I POriticm DetsctionSWitEh 1 DPmping Force changeover Acluatc., / EC3 Indii.ar l.igil*
THROTTLE POSITION SENSORM33ZKA6
INSPECTION AND ADJUSTMENTIRefer to GROUP 13
- Fuel System.‘lJ ’
STOP LIGHT SWITCHM33ZCAC
To remove or mount the stop light switch, refer to GROUP 35 -
Brake Pedal.
INSPECTIONRefer to GROUP 35
- Brake Pedal.
POSITION DETECTION SWITCH and
DAMPING FORCE CHANGEOVER
ACTUATORM33ZCAD
To remove or mount the position detection switch and dampingforce changeover actuator, refer to GROUP 33A
- Strut LJAssembly and GROUP 34
- Shock Absorber Assembly.
CautionThe position detection switch and damping force
changeover actuator are built into the shock absorber
assemblies of front and rear suspensions. Since they are ofthe non-disassembly type, remove or mount them in the
form of a strut assembly or shock absorber assembly.
ECS INDICATOR LIGHTM33ZLAB
To remove or mount the ECS indicator lights, refer to GROUP54
- Meters and Gauges.
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33B-24 ELECTRONIC CONTROL SUSPENSION (ECS) - Circuit Diagram
FRONT SHOCK ABSORBERtLH)
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L&J 110 ‘9 -----------------...-------------.-*\
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IELECTRONICICONTROL,SUSPENSIONICONTROL UNIT\
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FRONT SHOCK ABSORBERCRH)
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Lb--KX35-AX-Rl701A-NM
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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........................................................
iI

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

34-4REAR SUSPENSION - Troubleshooting
TROUBLESHOOTING
Symptom
Squeaks or other
abnormal noiseProbable cause
Loose rear suspension installation bolts and nuts
Malfunction of shock absorber
Worn bushings
Upper arms
and/or lower arms and/or assistlink deformed or damaged
Trailing arms deformed or damaged
Crossmember deformed or damaged
Excessive tire inflation pressure
Malfunction of shock absorber
Weakpr broken springs
Stabilizer bar and/or stabilizer link deformed
or damaged
Weak or deteriorated bushingsWeak or broken springs
Upper arms and/or lower arms and/or assistlink deformed or damaged
Trailing arms deformed or damaged
Crossmember deformed or damagedRemedy
Retrghten
Replace
Poor ride
Body tiltingAdjust the pressure
Replace
Replace
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REAR SUSPENSION - Rear Suspension Assembly34-7
REAR SUSPENSION ASSEMBLYM34GA-A
L/
REMOVAL AND INSTALLATION
140- 160 Nm*IOI- 116ftlbs.
Removal steps
1. Shock absorber mounting nuts (upper)2. ECS connector (ECS)3. Cap4. Brake line clamp bolt5. Brake caliper mounting bolt6. Brake caliper assembly7. Brake disc
8. Parkina brake cable clamo bolt
(Refer to GROUP 15 - Exhaust Pipe and
l * l +9. ParkinG brake cable end ”(Refer to GROUP 36 - Parking Brake.)10. Rear speed sensor clamp bolt (ABS)11. ABS speed sensor (ABS)12. Trailing arm mounting bolt and nut*I)13. Crossmember mounting nut*I)14. Rear suspension assembly
NOTE*.indicates parts which should be temporarily tightened, and
then fully tightened with the vehicle in the unladencondition.
Post-installation Operationl Installation of the Main Muffler(Refer to GROUP 15 - Exhaust Pipe andMain Muffler.)l Check of Wheel Alignment(Refer.to P.34-5.)l Check of Parking Brake Lever Stroke(Refer to GROUP 36 -Service AdjustmentProcedures.)l Installation of the Absorber Lid to Rear Side Trim(Refer to GROUP 52A-Trims.)A12FOllO
SERVICE POINTS OF REMOVALM34GBAT
13. REMOVAL OF CROSSMEMBER MOUNTING NUT / 14.
REAR SUSPENSION ASSEMBLYSupport the crossmember with a transmission jack, then
remove the crossmember mounting nut and rear suspen-
sion assembly.
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REAR SUSPENSION -Upper Arm, Lower Arm and Assist Link34-9UPPER ARM, LOWER ARM AND ASSIST LINK
iREMOVAL AND INSTALLATION
LPre-removal Operation
l Removal of the Shock Absorber
(Refer to P.34-13.)Post-installation Operation
l Check of Wheel Alignment
(Refer to P.34-5.)l Installation of the Shock Absorber
(Refer to P.34-13.)Upper arm removal steps
1. Brake line clamp bolta*2. Self-locking nut
140- 160 Nm*IOl-116ft.lbs.”\
\
2
/7
75-89Nm54 - 64 ft.lbs.
140 - 160 Nm*101 - 116ft.lbs.*
8
3. Upper arm mounting bolt and nut
4. Upper armLower arm removal steps
5. Lower arm mounting bolt and nutl *6. Self-locking nut
7. Lower armAssist link removal steps
8. Assist link mounting bolt and nut4*9. Self-locking nut10. Assist link
NOTE*:indicates parts which should be temporarily tightened, and
then fully tightened with the vehicle in the unladen
condition.
M34SA-S
Dustcover
rz412R0487
12A009$3TSB Revision
SERVICE POINTS OF REMOVALMSBAB2. 6. 9. REMOVAL OF SELF-LOCKING NUT
Using the special tool, disconnect the knuckle from the
upper arm, lower arm, and assist link.
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.

REAR SUSPENSION - Trailing Arm34-11
TRAILING ARMM34TA-A
t’REMOVAL AND INSTALLATION
,’
i;
18
90Nm* A65ft.lbs.* 15Post-installation Operation
lCheck of Wheel Alignment
‘Refer to P.34-5.)>heck of Parking Brake Lever Stroke(Refer tn GROIJP 36 - Service Adiustment
r/A -50-60Nm36 - 43ftlbs.
(Refer to GROUP 35 -Service Adjustment
-160Nm* -- 116ft.lbs.*Removal steps
1. Brake caliper mounting bolt
2. Brake caliper
3. Brake line clamp bolt
4. Rear brake disc5. Hubcap
6. Wheel bearing nut
7. Hub assembly
8. Parking brake cable clamp bolt*I) I)*9. Parking brake cable end (Refer to GROUP 36- Parking Brake.)IO. Rear speed sensor clamp bolt (ABS)
11. ABS speed sensor (ABS)
36 - 43 ftlbs.12FOlll
12. Backing plateI)+ 13. Stabilizer link mounting nutl I)14. Self-locking nut
15. Shock absorber mounting bolt (upper)
l *16. Self-locking nutl *17. Self-locking nut
18. Trailing arm mounting bolt and nut
19. Trailing arm assembly
NOTE*:indicates parts which should be temporarily tightened, and
then fully tightened with the vehicle in the unladen
condition.
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REAR SUSPENSION - Shock Absorber Assembly
SHOCK ABSORBER ASSEMBLYM34NA-A
iREMOVAL AND INSTALLATION
L
i
Pre-removal and Post-installation Operationl Removal and Installation of the Rear Side TrimRemoval steps
1. Shock absorber upper mounting nut
2. ECS connector (ECS)3. Cap
4. Brake line clamp bolt
5. Shock absorber lower mounting bolt
6. Shock absorber
NOTE*:indicates parts which should be temporarily tightened, and
then fully tightened with the vehicle in the unladen
condition.
45 Nm33 ft.lbs.12FOO87
DISASSEMBLY AND REASSEMBLYM34GMA
20-25 Nm
Disassembly steps
l * l a1, Piston rod tiahtenina nut2. Washer d u3. Upper bushing (A)** 4. Bracket assembly5. Upper spring pad6. Upper bushing (B)7.Collar
8.Cup assembly9.Dust cover10.Bump rubber+* 11. Coil spring12.Shock absorber
3
4
7
5
6
8
10
1280325:
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