sensor MITSUBISHI 3000GT 1991 Service Manual

ELECTRONIC CONTROL SUSPENSION (ECS) - :;:~u:~men*33B17(4) Check that when the accelerator
dedal is operated, the
indications of service data items No. 61 through 64 on theMUT change as shown in the following table.
(5) With the simulated vehicle speed at 60 km/h (37’ mph) and
90 km/h (56 mph), similarly operate the accelerator pedaland check that the MUT indications change over.
Accelerator operating condition
EnE~~esismp~~ed ~;zz-KzxJ130km/h(19mph)
1HARDIMEDllJMI
1 60 km/h (37 mph)1MEDIUMIMEDllJMI
1 90 km/h (56 mph)1SOFTIMEDLJMI(6) Check that when the accelerator pedal is released, the
original damping force (SOFT) is restored in less than a
second.5-4. High Speed Sensitive Control Function
Chleck(I) Select the Tour mode by the ECS switch.
(2) Check that when the entered simulated vehicle speed is
changed by the MUT, the indications of service data itemsNo. 61 through 64 change.
(If the simulated vehicle speed is continuously cihanged by
the
Q and .!J keys of the MUT, however, the indications of
service data items No. 61 through 64 do not change duringthe period the
0 or a key is pressed.)
Changing entered simulated
vehicle speedMUT indication
Acceleration 129 km/h (80 mph)to 130 km/h (81 mph)SOFT + MEDIUM
Deceleration 120 km/h (75 mph)
to 119 km/h (74 mph)MEDIUM +, SOFT
5-5. Pitching and Bouncing Control Function Check
(1) Select the Tour mode by the ECS switch.
(2) Using the MUT, check the indications of service data itemsNo. 61 through 64.
MUT indication: SOFT
(3) Remove the G sensor, slowly shake it up and down througha space of about 5 cm (1.9 in.) with the connector
connected, and check that the indications of service dataitems No. 61 through 64 change.
G sensor status
IMUT indicationI
Shake up and down at a speed of arou.nd trip in a second.HARD(4) Check that when the G sensor is held stationary, the
original damping force indication (SOFT) is restored.
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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

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) - Circuit Diaaram 33B-23
IGN:sw1::A?-m
I&
177
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ON(IG2)SV
el
ENGINEf"BTROL
GNDIfi
1234
J333256‘78
6461 72>
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CLL2c
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,Jm4,\/\THROTTLE;;;EI;;ON
4-1
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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

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 - 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 - Rear Axle Hub
REAR AXLE HUB34-17
REMOVAL AND INSTALLATION
50-60Nm36 - 43 ftlbs.
1
Removal steps
*I)I, Rear speed sensor a*2. Caliper assembly
3. Brake disc
4. Hubcap
l +5. Wheel bearing nut
6. Tongued washer
7. Rear hub assembly
*I)8. Rear rotor 9. Rear hub unit bearing
Caution
Rear hub unit bearing cannot be disassembled.
llN0018
14NOlO14N009E
SERVICE POINTS OF REMOVALM34MBAC
1.REMOVAL OF REAR SPEED SENSOR ABS>Caution
Be careful when handling the pole piece at the tip of the
speed 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 ABS>Caution
Care 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 might
not perform normally.
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34-24REAR SUSPENSION - Rear Suspension Assembly
REAR SUSPENSION ASSEMBLY
REMOVAL AND INSTALLATION
M34GA-B
L
Rel
145 Nm9- 33 ftlbs.
1. Shock absorber mounting nuts (upper)*
2. ECS connector
*Pre-removal Operationl Removal of the Rear Side Trim Absorber Lid
(RefertoGROUP52A-Trims.)l Removal of the Center Exhaust Pipe and Main Muffler
(Refer to GROUP 15
- Exhaust Pipe and Main Muffler.)
5. Brake caliper*
1,50-60NmI36 - 43 ft.lbs.35 Nm
$8 Nm“?C,ILc. ashwez I,..“=.BP’----12Nm9 ftlbs.
15..e12FO1088. Pressure tube assembly to pipe assembly
connection
<4WS>9. Feed pipe assembly to suction hose connec-
tion
<4WS>10. Return pipe assembly to rubber hose con-
nection t4WS>11. Power cylinder tie rod coupling nut <4WS>*12. Differential carrier to propeller shaft coupling
bolt and nut
Post-installation Operationl installation of the Center Exhaust Pipe and Main Muffler
(Refer to GROUP 15
- Exhaust Pioe and Main Muffler.)
l Installation of the Rear Side Trim Absorber Lid
(Refer to GROUP
52A-Trims.)13. Center bearing mounting nut
14. Harness connector connection
CABS>*15. Parking brake cable and ABS sensor fixingl Refilling and Bleeding of the Power Steering System
(Refer to GROUP
37A- Service AdjustmentProcedures.)bolt
*16. Cable band*
17. Crossmember bracket*
18. Crossmember mounting nut (on differential
side)”19. Rear suspension assemblyl Checking Wheel Alignment
(Refer to P.34-23.)
l Bleeding of 4WS System
(Refer to GROUP 37B
- Service Adjustment
Procedures.)
l Operation Inspection of the 4WS System
(Refer to GROUP 37B - Service AdiustmentProcedures.)
NOTEParts marked with * are symmetrical.
,* Checking the Parking Brake Lever Stroke
(Refer to GROUP 36 -Service Adjustment
Procedures.)i
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34-30REAR SUSPENSION - Trailing Arm
TRAILING ARMM34TA-B1
REMOVAL AND INSTALLATIONN/A
$icJ
14 ft.lbs.T/C vehicles26-30Nm
50-60Nm936 - 43 ftlbs.\19 - 22 ft.lbs.
55-65Nm40 - 47ft.lbs.
200
- 240 Nm*145- 174ft.lbs.* I
P100 Nm
72 ft.lbs.
58 Nm’ <842 ft.lbs.Removal steps
*I)
*I)
+*+*
1. Rear brake caliper assembly
2. Rear brake disc
3. Drive shaft to companion flange mounting
bolt and nut
4. Self-locking nut
5. Companion flange
6. Rear axle shaft
7. Parking brake cable end
8. Parking brake cable clamp bolt
9. Rear speed sensor
(ABS)IO. Rear speed sensor cable and parking brake
cable bands (ABS)II. Dust shield
12. Self-locking nut (upper arm)
13. Self-locking nut (lower arm)
14. Tie rod end mounting
nut15. Trailing arm mounting bolt and nut
16. Rear shock absorber mounting bolt
17. Trailing arm
NOTEFor tightening points marked with *, first temporarily tighten
and then ground the vehicle to torque to specification where the
vehicle is empty.‘7
il 6’
12FOO89
Post-installation Operationl Check of Wheel Alignment
(Refer to P.34-23)l Check of Parking Brake Lever Stroke(Refer to GROUP 36 - Service Adiustment
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L,
SERVICE
BRAKES
CONTENTSM35AA..
ANTI-LOCK BRAKING SYSTEM TROUBLESHOOTING7Actuator Test Function
. . . . ..___..._____.__................................ I 2, 36Check Using Self Diagnosis Function __._.....,_._.._____........ 11, 28
Diagnosis Code Chart ..,,........,......_..................................,. 1 I, 28
How to Use the Troubleshooting Flow Chart
_____.___......._._.7Method of Clearing Diagnosis Code Memory._.,._...... 12, 30
Particular Phenomena of the Anti-lock Braking System
7Troubleshooting (ABS-AWD) ._______._.._...........................,... 26
Troubleshooting (ABS-FWD) ______.._._........_...........,.....,.....,....8
TroubleshootingMethods. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
BRAKE LINE . . . . . . .._.......................................................................71
BRAKEPEDAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64
ELECTRONIC CONTROL UNIT (ABS). . . . .._._..___..__._............93/
L
FRONT DISC BRAKE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73G SENSOR (AWD-ABS)’
____.____.___.__._._.................,,......,.....,.... 92
HYDRAULIC UNIT (ABS) .___.._._._._.______.............,...,,..........~ .,_____86
MASTER CYLINDER AND BRAKE BOOSTER ..__.._____.._____67SPECIFICATIONS ._....._.___.....................................
REAR DISC BRAKE . . . . . . .._..._._.___................................................81
SERVICE ADJUSTMENT PROCEDURES..___........45Bleeding48
Brake Booster Operating Inspection.
46
Brake Drum Inside Diameter Check. . .56
BrakeFluidLevelSensor Check.46
Brake Lining and Brake Drum Connection Check56Brake
Linrng Thickness Check............................................Brake Pedal Inspection and Adjustment............................Check Valve Operation Check............................................Front Brake Disc Run-out Check........................................Front Brake Disc Run-out Correction................................Front Disc Brake Pad Check and Replacement................Inspection of Front Brake Disc Thickness........................Inspection of Hydraulic Unit................................................Inspectton of Power Relay....................................................Inspection of Valve Relay and Motor Relay (ABS)............Measurement of Wheel Speed Sensor Output Voltage
Proportioning Valve Function Test
....................................Rear Brake Disc Run-out Check........................................Rear Brake Disc Run-out Correction................................Rear Brake Disc Thickness Check....................................Rear Disc Brake Pad Check and Replacement................Remedy in Case of DischargedBattery............................56
45
46
52
53
48
5258
62
62
57
47
55
55
55
53
62
SPECIAL TOOLS ..__.......___..........................................................General Specifications
........................................................Lubricants............................................................................Sealants and Adhesives........................................................Service Specifications........................................................3
TROUBLESHOOTING............................................................5
WHEEL SPEED SENSOR (ABS)............................................88
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
(1)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, air bagmodule, clock spring, interconnecting wiring. Other SRS-related components (that may have to 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 (fromrendering the SRS inoperative).
(2) Service or maintenance of any SRS component or SRS-related component must be performed only at anauthorized MITSUBISHI dealer.
(3) MITSUBISHI dealer personnel must thoroughly review this manual, and especially its GROUP 52B
-Supplemental Restraint System (SRS), before beginning any service or maintenance of any component of theSRS or any SRS-related component.
i