MITSUBISHI 3000GT 1991 Service Manual

SERVICE BRAKES- Service Adiustment Procedures35-59
iPressure decrease
Release
pjgKq LockDrag force when
pedal is releasedMUT actuator
itest start
3 sec.
I3 sec.
Pedal operation
Pedal operation
pattern @
pattern @
JJ.r__---------------
I
I
I
I----------
------------------4
I1r-’ - - - - - - - - - a -I6 sec.
1------ __---____-__ - --___-__--_ ---J’-
14FOO96(7) If any abnormality is found in the check, take corrective
action according to the following “Judgement in Inspection
by Feel” table.
Judgement in Inspection by Feel
No.
I IMUT display
04FR VALVE
M
05FL VALVEM
t
106”
I IRear VALVEM”Operation
(1) Depress brake pedal to
lock wheel.
(2) Using the MUT. select
the wheel to be checked
and force the actu-
ator to operate.
(3)Turn the selected wheel
manually to check the
change of brake force.
1-1 ‘gkte / Remedy
Normal
Brake force
released for 6
seconds after
locking.Wheel doesClogged brake Check and
not lock when
line other than clean brake
brake pedal HUline
is depressed.
Clogged
hy-Replace HU
draulic circuit assembly
in HUBrake force is
Incorrect HUConnect
not releasedbrake tubecorrectly
connection
HU solenoid
valve not
functioning
correctlyReplace HU
assembly
NOTE*: FWD
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35-60SERVICE BRAKES - Service Adjustment Procedures
INSPECTION BY USING BRAKE FORCE TESTER
NOTE
(1) The brake force tester roller and tire must be dry during the
test.
(2) When testing the front brakes, apply the parking brake and
when testing the rear brakes, apply chocks to the front
wheels to lock them.
(I) Place the front or rear wheels on the brake force tester
roller.(2) Set the MUT through the adapter harness
(MB9913771 as
illustrated.
(3) After confirming that the shift lever or selector lever is in
the neutral position, start the engine.
(The ABS warning light lights up, it goes into the
-MUTmode. In the MUT mode, ABS does not function.)
(4) Operate the brake force tester roller.
(5) Depress the brake pedal until the brake force tester
indicates the following value and keep the brake force at
this level during the test.
Front wheels: 1,000 N (220
Ibs.)Rear wheels: 650 N (143
Ibs.)(6) Allow the brake tester indication to stabilize before operat-
ing the MUT to perform actuator test (Item No. 01,
02, 03).
Then, read change of tester indication.
Referring to the following “Judgement in Inspection by
Using Brake Force Tester” table, judge and take corrective
action if necessary.
NOTEWhile the ABS is in the fail safe mode, the MUT actuator
test cannot be made.
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SERVICE BRAKES - Service Adiustment Procedures35-61
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When energized
Between terminals 4 and 5Continuity
When de-energized
Between terminals 4 and 5\i fl \\ 16FO264No continuity
Between terminals 1 and 3Continuity
16FO122L--J18FOCII
SERVICE BRAKES - Service Adjustment ProceduresI
INSPECTION OF POWER RELAYM35FOAP
7
1.Remove the relay box cover in the engine compartment and
remove the power relay.
2. Apply the battery voltage to the terminal @ and check for
‘L-J1
continuity between the following terminals when the
terminal @ is short-circuited to ground.
35-62
14FOOS14FOO8
l-TSB
1
REMEDY IN CASE OF DISCHARGED BATTERY
M35FOAQIf the engine is jump-started, because of a completely
discharged battery, the vehicle may suffer misfiring and fail to
start if an attempt is made to start without allowing the battery
to recover sufficiently. This is because the ABS consumes a
great deal of current for its self check. In such a case, allow the
battery to sufficiently charge or remove the ABS power relay in
the engine compartment to disable the ABS. Removing the
ABS causes the ABS warning light to light. After the battery is
charged sufficiently, install the power relay and restart the
engine to check that the ABS warning light goes out.
INSPECTION OF VALVE RELAY AND MOTOR
RELAY (ABS)M35FOAR1. Remove the splash shield
(FR) and remove the relay box
cover by inserting a screwdriver between the hydraulic unit
and cover to pry off the lock.
2.Remove the relays. The one closest to you (larger one) is
the motor relay and the one farthest from you (smaller one)
is the valve relay.
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wision

SERVICE BRAKES - Service Adjustment Procedures35-6316R067C
16R06703. Check continuity of the relays both when they are ener-
gized and de-energized.
Motor Relay
When de-energizedBetween
termrnals @30-600and@When energized
between terminals
@and@Between
termrnals @
and @
Between terminals @
and @No contrnurty(mmContinuity
(approx.
ORI
vVhen de-energizedBetween terminals @60-120~~and QBetween terminals @
and
@IContinuity
(approx. On)Between terminals @
and @
flo;rntinuityccWhen energizedBetween terminals @and
oetween terminals@
yo;;ntinuityco
@and@Between terminals @ andContrnuity@(approx. OR
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35-64SERVICE BRAKES - Brake Pedal
BRAKE PEDAL
REMOVAL AND INSTALLATIONM35GA-
-

Post-installation Operationl Installation of Steering Column
Assembly
(Refer to GROUP
37A-SteeringWheel and Shaft.)l Clutch Pedal Adjustment
(Refer to GROUP 21 -Clutch Pedal.)
l Brake Pedal Adjustment
(Refer to
P.3545.)
Stop light switch removal steps
I. Stop light switch connector
2. Stop light switch
Brake pedal removal steps
I)* 3. Return spring
4. Cotter pin
5. Washer
6. Clevis pin
9. Brake pedal assembly
(parts from step
10 to step 21)10. Brake pedal shaft bolt
13. Brake pedal
14. Bushing
15. Spacer
l * l * 20. Clutch pedal (Refer to Group 2
Pedal.)1 -Clutch
21. Brake pedal support member
30 Nmftlbs.
’ 12Nm9 ft.lbs.
c-iA.14
14FO10614
l?
14AO2564 5
%
,36il4”OOS,
. .
I
I~
d
I
I
I
I
I~11~
d,
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SERVICE BRAKES - Brake Pedal35-65
‘Ii14 Nm
i3Nmy9 ftlbs.
6
h 14FOlO8. .22ttJbs.
--2
-.113Nm14 Nm
9 ft.lbs.
10 klbs.
Stop light switch removal steps1. Stop light switch connector
2. Stop light switch
Brake pedal removal steps
l *3. Return spring
4. Cotter pin
5. Washer\12 Nlm9 ftllbs.6. Clevis pin
7. Cotter pin
8. Shift lock cable connection
9. Brake pedal assembly (parts from step
10 to
step 21)
/’/’10.
11.
12.13.
14.
15.
16.
17.
18.
19.
21.Brake pedal shaft bolt
Lever assembly installation nut
Lever assembly
Brake assembly
Bushing
Spacer
Cotter pin
Link assembly
Lever assemblyBushinq
Brake pedal support member
/
14FO107
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35-66SERVICE BRAKES - Brake Pedal
14LO142No continuity Continuity
4mm
(.I6 in.)14LO171
:Vehicles with cruise control>a
b14LO17C
Brake pedal
14FOO76
INSPECTIONM35GCANl Check the bushing for wear.
l Check the brake pedal for bend or twisting.
l Check the brake pedal return spring for damage.
‘LJ)STOP LIGHT SWITCH
(I) Connect a circuit tester to the stop light switch.
(2) The
stolj light
switch is in good condition if there is no
continuity when the plunger is pushed in to a depth of
within 4 mm
(.16 in.) from the outer case edge surface, and
if there is continuity when it is released.
For vehicles with the cruise control system, the check for
continuity should be made at connectors “a” and “b” of the
stop light switch.
SERVICE POINT OF INSTALLATIONM35GDBG3. INSTALLATION OF RETURN SPRING
Install the return spring with the shorter hook on the brake
pedal.
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Brake tube flare nut15Nm
11 ft.lbs.
m14FO38

Post-installation Operationl Supplying Brake Fluid
l-----l
l Bleeding(Refer to P.35-48.)l Adjustment of Brake Pedal
(Refer to P.35-45.)

81
‘414ux216 1
Sealant: 3M ATDPart No.
-----I8663 or equivalent
SERVICE BRAKES - Master Cylinder and Brake Booster35-67
MASTER CYLINDER AND BRAKE BOOSTER
L
REMOVAL AND INSTALLATION
14 NmIO ft.lbs.
10 Nm
7 ft.lbs.
Master cylinder removal steps
*I)1. Low-pressure hose
2. Brake fluid level sensor connector
3: Brake tube connection
4. Master cylinder
l e .Adjustment of clearance between brake
booster push rod and primary piston
Brake booster removal steps
4.Master cylinder5.Vacuum hose6.Vacuum tubel a7. Vacuum hose with check valve8.Fitting9.Cotter pin10.Washer11.Clevis pin.
12.Sealer13.Spacer
14.Brake booster
lb14FOlll
9 10
bpr.
m
cl11
1 t
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35-68
SERVICE BRAKES - Master Cvlinder and Brake Booster
Vacuum hosemm (in.
Brake booster
20
- 23 t.79 - .9114A039i
SERVICE POINT OF REMOVALM35lBAK1. MOVING LOW-PRESSURE HOSE
Remove the nuts and bolts securing low-pressure hose
shown in the illustration, and using a wire, suspend the
hose from the hood to a position where it does not hamper
the removal and installation of the brake booster.
Caution
Move the hose slowly with care not to bend it.
SERVICE POINTS OF INSTALLATIONM35lDAUVALVE
(1) In the case of AWD, insert the vacuum hose of the
not to allow it to contact the check valve. Then, secure
the hose with hose clip.
connected until it contacts the hexagonal edge of the
fitting, and then should be secured by the hose clip.
If the check valve is defective, replace the vacuum
hose.BOOSTER PUSH ROD AND PRIMARY PISTON
Adjust the clearance (A) between the brake booster push
(I) Measure the dimension (B) between the master cylin-
der end face and piston.
NOTETo obtain
(B), first take measurement with a square
placed on the master cylinder end face. Then, subtract
the thickness of the square to arrive at (B).
(2) Obtain the dimension
(C) between the brake booster
mounting surface on the master cylinder and the end
face.
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