MITSUBISHI 3000GT 1991 Service Manual

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

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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ELECTRONIC CONTROL SUSPENSION (ECS) - ECS Control Unit 33B-21
ECS CONTROL UNITM33ZXAD
REMOVAL AND INSTALLATIONRemoval steps
\12FOO98I.
Cargo floor box (R.H.)2. Lid
3. ECS control unitTSB Revision

33B-22 ELECTRONIC CONTROL SUSPENSION (ECS) - Circuit Diagram
CIRCUIT DIAGRAMM33ZEAB
TAILL-_
-
!
!-1
J/G
pyspq3 2 10’1? 12!~3 Ir. Eli
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3&
Eiv,I
1 \L-2
E
s=
43
21_r
%c;
0
,-:=
J.4
T RELAY--
-1 F;;;CATED
-
1234
-m5578
__p7zERmj
FUSIBLE LINK@J/B
@
I 81GAI
ELECTROMIC CONTROLSUSPEldSiOi,dCONTRllL Ui'dIT
----- -m12123E>[1:
II
1u2m
II
JUIvPERBCONNECTOR
LEd1254
m
M
,p 10___. _
lt f“u 1
0, iLL
1-L. ET- JN
i;4 m'llm
i I
ECSSWITCr;
pg&-jqq-.
E
t2
12’
II334
%
-
rk
8
62-------____
-
q
ET
12---c.
n
G
3-
I
.---._-__60
1------.--
Q2A
10-
SELF-DIAGNOSISCXECK COKNECTOR
X35-AX-Bi?Gl-E,TSB Revision

ELECTRONIC CONTROL SUSPENSION (ECS) - Circuit Diaaram 33B-23
IGN:sw1::A?-m
I&
177
i '
3
I
2YJ
-+d
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
. I
!i
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

33B-24 ELECTRONIC CONTROL SUSPENSION (ECS) - Circuit Diagram
FRONT SHOCK ABSORBERtLH)
,I
/I
‘1 JoI I_III/ /
w
L&J 110 ‘9 -----------------...-------------.-*\
+d
.& 21’f5Ys’v
a c
& CL
,I3 4
--- --
i fj ycc/ !2
6
I7--- ---
qI
I$
L5-g
i-5
v2
j,t
k
1
,,3/\
:I
b-
4
3!s”v
IELECTRONICICONTROL,SUSPENSIONICONTROL UNIT\
IL
5”5Y
l-3 5z-3
5”
pl Q
gfz’i TG
4 r-4
q; yGNEI
-y;“-~,-~--~~~-------------~~~-~~~~l 1 ;5r
I
114 ii0 !!d! ‘i L:c!Y! >1
;I5jA, KlqqELII iFFR!
;‘-1112’;;/;::;
m/rfGiz&j
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I- iiIA/ &
I’7 j
1-ii-1234563456
&L-*4-- ,3
&,I ,r!,;>,I5 !, 3
‘ii
\n;, L
[-- (--f--!y[ w/
I,\ I* A
tkii j?n
&--~:;--A, ___;“PC *,a-.C”p :7 iti/I iy~
! j-J-A,& ‘1 ! i
j;&ONd ON q jj :[
;#-rTi,A-/!j/ I1II‘I
/ i:
III-1WJ SHXKs$flp SHOCK\m m
c’oc
I2m
I
105=3
r---------’
LB\ \,‘_+3a1‘k,
! 1”
pi..+ _ 13
II
m
L23
’
5---4-/4--
i qff dii
pR!izaq
! “f’ /!I
FRONT SHOCK ABSORBERCRH)
cj
--- --i$, &
3 y1
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

REAR SUSPENSION - Special Tools
SPECIAL TOOLS
34-3
M34DA-A
pring compressorompressfon 0
member
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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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