1991 MITSUBISHI 3000GT check oil

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
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33B-6ELECTRONIC CONTROL SUSPENSION (ECS) - Troubleshooting
I I2When diagnosis code No. 21 is output, or when anti-roil control only stops.
Using MUT, check service data onthe steering angular velocity sensor.Check by entering simulated vehicle speed tosimulate anti-roll controls. (Refer to P.33B-16.)
+No
No. 2,3 and 4 terminal voltages up
to specification?Standard: 5 V
Yes
>Is continuity provided across the followingareas?Between steering angular velocity sensorand ECS control unit
Between No. 2 terminal and No.!Between No. 3 terminal and No.
Between No. 4 terminal and No.
Yes
Is trouble cleared by replacing
End
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34-14REAR SUSPENSION - Shock Absorber Assemblv
12K(u9
‘7
Coil
,’I
seat12A0049
SERVICE POINT OF DISASSEMBLYM34GNAB1. REMOVAL OF PISTON ROD TIGHTENING NUT
(1) Before removing the piston rod tightening nut, corn-
press the coil spring using the special tool.
d(2) While holding the piston rod, remove the piston rod
tightening nut.
INSPECTIONM34GOACl
l Check the rubber parts for damage.
lCheck the coil springs for crack, damage or deterioration.
SERVICE POINTS OF REASSEMBLYM34GPAC
11. INSTALLATION OF COIL SPRING(1) Use the special tool
(MB990987-01) to compress the
coil spring and insert it in the shock absorber.
(2) Align the edge of the coil spring to the position of the
shock absorber spring seat as shown.
4. INSTALLATION OF BRACKET ASSEMBLY / 1. PISTONROD TIGHTENING NUT
(1) With the position of the bracket assembly as shown inthe figure, tighten the tightening nut to the specified
torque.
(2) Install the coil spring so that the lower edge fits into thespring seat groove and the upper edge fits into the
spring pad groove, then remove the special tool
’
(MB990987-01).L/iTSB Revision

L
REAR SUSPENSION - Shock Absorber Assembly34-33
SHOCK ABSORBER ASSEMBLY
REMOVAL AND INSTALLATION1 v i5 KS
23
,
Pre-removal and Post-installation Operation
l Removal and Installation of the Rear Side Trim
Absorber Lid
(Refer to GROUP 52A-Trims.)
Removal steps1. Shock absorber upper mounting nut
2. ECS connector
(ECS)3. Cap
4. Shock absorber lower mounting bolt
5. Shock absorber assembly
M34NA-612FOO86
M34GM-BDISASSEMBLY AND REASSEMBLY
20-25 Nm14- 18ft.lbs.
Disassembly steps1. Cap
2. Piston rod tightening nut
(Refer to
P.34-14.)3.hasher4. Upper bushing (A)
5. Bracket assembly (Refer to
P.34-14.)6.Spring pad
7. Upper bushing (B)8.Collar9.Cup assembly10.Dust cover11.Bump rubber
12. Coil spring (Refer to P.34-14.)13.Shock absorber
12A0360
INSPECTIONM34GOAC2l Check the rubber parts for damage.
lCheck the coil springs for crack, damage or deterioration.
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35-6SERVICE BRAKES - TroubleshootingSymptomProbable cause
Remedy
Insufficient parking
Worn brake pad
brake functionReplace
Excessive parking brake lever stroke
Adjust the parking brake lever stroke
or check the parking brake cable
routing
Grease or oil on pad surface
Replace
Parking brake cable sticking
Replace
Stuck caliper piston
Replace
Scraping or grindingWorn brake pad
noise when brakes areReplace
appliedCaliper to wheel interferenceCorrect or replace
Cracked brake discCorrect or replace
Squealing, groaning or
chattering noise whenDisc brakes
- missing or damaged brake pad
anti-squeak shimReplace
brakes are applied
Brake discs and pads worn or scoredCorrect or replace
Improper lining partsCorrect or replace
Disc brakes-burred or rusted calipersClean or deburr
Dirty, greased, contaminated or glazed padClean or replace
Incorrect adjustment of brake pedal or booster
push-rodAdjust
Squealing noise whenDisc brakes
- rusted, stuck
brakes are not appliedLubricate or replace
Loose or extra parts in brakesRetighten
Improper positioning of pads in caliperCorrect
Improper installation of support mounting toCorrect
caliper body
Poor return of brake booster or master cylinderReplace
Incorrect adjustment of brake pedal or booster
push-rodAdjust
Groaning, clicking orStones or foreign material trapped inside wheelRemove stones, etc.
rattling noise whencovers
brakes are not applied
Loose wheel nutsRetighten
Disc brakes-failure of shimReplace
Disc brakes
- loose installation boltRetighten
Incorrect adjustment of brake pedal or booster
push-rodAdjust
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d
d

PARKING BRAKES - Special Tools / Troubleshooting36-3
SPECIAL TOOLS
I/
i/ToolNumber
NameUse
IMB990767-01
End yoke holderRemoval of the rear axle shaft assembly1
L
MB990241-01
Axle puller
MB99021 I-01SL$p;;rmmer with
Ii
TROUBLESHOOTINGM36EAAL
Symptom
Brake drag
Insufficient parking
brake functionProbable cause
Incomplete release of parking brake
lndorrect parking brake adjustment
Worn brake padRemedy
Correct
Adjust
Replace
Excessive parking brake lever strokeAdjust the parking brake lever stroke
or check the parking brake cable
routing
Grease or oil on pad surface
Parking brake cable sticking
Replace
Replace
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37A-1
STEERING
CONTENTSM37AA-A
POWER STEERING GEAR BOX*....................17Steering Wheel Return to Center
Check................................................................8
POWER STEERING HOSES................................32Tie Rod End Ball Joint Startinq Torque
POWER STEERING OIL PUMP. .._....................28Check. . . . . . . . .._.............................. r . . . . . . . . ..I . . . . . .6Tie Rod End Ball Joint Variation Check
SERVICE ADJUSTMENT PROCEDURES5(Shaft direction)................................................5........
Bleeding............................................................10V-Belt Tension Check........................................8
Fluid Level Check............................................9SPECIAL TOOLS....................................................3Fluid Replacement
............................................9
/
bOil Pressure Switch Check
SPECIFICATIONS2............................12................................................Oil Pump Pressure Test
....................................1 1General Specifications....................................2Stationary Steering Effort Check
....................8Lubricants............................................................3Steering Angle Check
5Sealant and Adhesives....................................3........................................Steering Wheel Centering
6Service Specifications....................................2................................Steering Wheel Free Play Check
....................5STEERING WHEEL AND SHAFT*....................13
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!(I)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 (from
rendering the SRS inoperative).
(2) Service or maintenance of any SRS component or SRS-related component must be performed only at an
authorized 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.

37A-8STEERING - Service Adjustment Procedures13FOOO3
13FOOOl
STATIONARY STEERING EFFORT CHECKM37FFAM
1.With the vehicle stopped on a flat, paved surface, turn the
steering wheel to the straight ahead position.
2. Start the engine and set it to 1,000
+ 100 rpm.d
Caution
After checking the engine speed, there must be a returnto the standard idling speed.
3. Attach a spring balance to the outer circumference of the
steering wheel and measure the steering force required to
turn the steering wheel from the straight ahead position to
the left and right (within a range of 1.5 turns).
Also check to be sure that there is no significant fluctuation
of the required steering force.
Standard value:
Steering effort35 N (8 Ibs.) or less
Fluctuation allowance
6 N (1.3 Ibs.) or less
STEERING WHEEL RETURN TO CENTER CHECK
M37FGACiTo make this test, conduct a road test and check as follows.
1.Make both gradual and,sudden turns and check the steering
“feeling” to be sure that there is no difference in the
steering force required and the wheel return between left
and right turns.
2. At a speed of 35 km/h (22 mph), turn the steering wheel
90”. and release the steering wheel after 1 or 2 seconds. If
the steering wheel then returns 70” or more, the return can
be judged to the satisfactory.
NOTEThere will be a momentary feeling of “heaviness” when the
wheel is turned quickly, but this is not abnormal. (This is
because the oil pump discharge amount is especially apt to
be insufficient during idling.)
V-BELT TENSION CHECKM37FHAJCheck to be sure that the belt is not damaged and that the
V-belt is correctly attached to the groove of the pulley.
NOTEIf there is abnormal noise or belt slippage, check the belt
tension and check for unusual wear or abrasion, or damage, of
the pulley contact surface, and for scars or scratches on the
pulley.d
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