1991 MITSUBISHI ECLIPSE Service Manual

BRAKES - Specifications5-5Items
Nmftlbs.Master cylinder to brake booster
8-126-9
Piston stopper bolt
1.5-3.0l-2Nipple installation screw
1.5-3.0l-2Brake booster installation nuts
11-178-12
Fitting15-1811-13
Flared brake line nuts
13-179-12
Brake hose bracket installation bolts
17-2612-19
Front disc brake assembly installation bolts
80-10058-72
Lock pin (front)
64-8646-62
Guide pin (front)
64-8646-62
Bleeder screw
7-95-7
Wheel bearing nut
200-260144-188
Dust shield to axle beam
9-14
7-10Rear disc brake assembly installation bolts
50-6036-43
Drive shaft to companion flange
55-6539-47
companion flange to rear axle shaft160-200116-159
Brake hose to caliper body (rear)
25-35
18-25Lock
pin (rear)
22-3216-23
Guide pin (rear)
22-32
16-23Spindle lever to parking brake lever
40-5529-40
3ear speed sensor installation bolt
9-147-10Speed sensor bracket installation bolt
9-14
7-10
3otor to front hub
7-115-8
3otor to rear hub
9-147-10
LUBRICANTSNO5CP-
ItemsBrake fluidSpecified lubricant
MOPAR Brake
Fluid/Conforming to
DOT3Brake pedal bushing inner surface
Clevis pin and washer
Parking brake lever sliding parts
Bushing inner surfaceMOPAR Multi-mileage Lubricant
Part No. 2525035 or equivalent

5-6BRAKES - Specifications/Special Tools
ItemsBrake piston seal
Brake piston boot inner surfaces
Brake lock pin boot inner surfaces
Guide pin boot inner surfaces
Guide pin and caliper support contact surface
Lock pin and caliper support contact surface
Spindle lever, lever boot, connecting link,
O-ring and auto adjuster spindle
SPECIAL TOOLSSpecified lubricant
Repair kit grease (orange)
Rear disc brake
Pressing of the rear disc brake pistons
Sliding hammer set

BRAKES - Troubleshooting
TROUBLESHOOTING
-
Brake drag
brake function

5-8BRAKES - Troubleshooting
Symptom
Scraping or grinding
noise when brakes are
appliedProbable cause
Worn brake pad
Caliper to wheel interference
Cracked brake discRemedy
Replace
Correct or replace
Squealing, groaning orchattering noise when
brakes are appliedDisc brakes-missing or damaged brake pad
anti-
squeak shimReplace
Brake discs and pads worn or scored
Improper lining partsCorrect or replaceDisc brake-burred or rusted calipers
Dirty, greased, contaminated or glazed pad
Incorrect adjustment of brake pedal or booster
push-rodClean or deburrClean or replaceAdjust
Squealing noise when
brakes are not appliedDisc brakes-rusted, stuckLubricate or replace
Loose or extra parts in brakes
Improper positioning of pads in caliperRetighten
Improper installation of support mounting to caliperCorrect
body
Poor return of brake booster or master cylinder
Incorrect adjustment of brake pedal or booster
push-rod
ReplaceAdjust
Groaning, clicking or rat-Stones or foreign material trapped inside wheelRemove stones, etc.
tling noise when brakescovers
are not appliedDisc brakes-failure of shim
ReplaceDisc brakes-loose installation bolt
Retighten
Loose wheel nuts
Incorrect adjustment of brake pedal or booster
push-rodAdjust

BRAKES - Anti-lock Braking System Troubleshooting5-9
ANTI-LOCK BRAKING SYSTEM
-- TROUBLESHOOTINGNO!JEBAE
PARTICULAR CHARACTERISTICS OF
THE ANTI-LOCK BRAKING SYSTEMModels equipped with the anti-lock braking system
(A.B.S.) may exhibit one or more of the following
characteristics from time to time, but none of these
is abnormal.
(1) A pulsing feeling in the brake pedal, or vibration
of the body or the steering wheel, when the
anti-lock braking system is activated by sudden
braking or by braking on a slippery road surface.Actually, this phenomenon is an indication that
the anti-lock braking system is functioning nor-
mally.(2) When the vehicle speed reaches approximately
6 km/h (4 mph) after the engine is started and
the vehicle starts off (for the first time), a
whining motor noise may be heard from the
engine compartment if the vehicle is traveling in
a quiet place, but this noise is simply the result
of a self-check being made of the anti-lock
braking system operation.
TROUBLESHOOTING METHODSProblems related to the anti-lock braking system
(A.B.S.) can be classified into two general categor-
ies: problems in the electrical system and those in
the hydraulic system.For problems in the electrical system, the
self-diagnosis function is built into the electronic control
unit (E.C.U.) causing the A.B.S. warning light to
illuminate as a warning to the driver.
Problems in the hydraulic system (poor braking,
etc.) can be located in the same way as for ordinary
brakes. There is, however, the necessity to check todetermine whether the problem is related to ordin-
ary brake components or to the components relatedto the A.B.S.
HOW TO USE THE TROUBLESHOOTING
FLOW CHART(1) Using the flow chart, check the ABS warning
light light-up sequence and check the condition
of braking operation.
(2) Following the check chart listed in the remedy
column, perform the checks. There are [Explana-tion] and [Hint] in each check chart. Refer to
them when troubleshooting.
NOTEECU: Electronic control unit
HU: Hydraulic unit
MUT: Multi-use tester

Ioes the ABS warning light illuminate as describedbelow up to the time the engine starts?
1) When the ignition key is turned to the “ON”
position, the ABS warning light illuminates for
approximately 1 second due to the ABS ECU (asa self check of the valve relays is performed),
then it blinks twice and goes out and stays out.
2) With the ignition key in the “START” position,
power to the ABS ECU is interrupted and the
5-10BRAKES - Anti-lock Braking System Troubleshooting
TROUBLESHOOTING (ABS-FWD)Confirm condition in the following way and diagnosis accordingly.
ABS warning light remains lit because the valve
relay is OFF.
(3) When the ignition key is turned from the
“START” position to the “ON” position, the
ABS warning light illuminates for approximately
1 second (during this time a recheck of the valverelays is performed), then it blinks twice and
then goes out and stays out.
ABS warning
lightON
OFF
1Ignition
kev
ST
ON
ACC, LOCK
IYes
CONTINUE TO NEXT PAGE
No
No.Trouble condition
ABS warning light does not light up at all.
ON
1 --ABSwarningOFF
1lightlgnitlon
kev
14A0590When the ignition key is turned to the
“ON” position, it remains lighted.
ABSwarning
2light
Ignition
kevACC,
LO:+14AOSQlDoes not illuminate when ignition key is
in “START” position.
ABSONwarning
3lightOFFUULkev ACC.
LO:-+-Ignition14A0592
1 sec. 1 sec.1 sec.1 sec.
---
IIII
3114AO589
IMajor causes
l ABS warning light bulb is burnt out.Check, using flow
l Open in ABS warning light electricalchart A (Refer to P.5-
circuit (check for blown fuse)12.)
l Fail safe is functioning due to ECU selfdiagnosis
o Short in ECU warning light drive circuitl Malfunction of ECU
l Malfunction of valve relayl Break in harness between ABS warn-
ing light and HU
l Break in harness between HU and
body groundRemedy
Check, using flow
chart
B (Refer to P.5-
15.)
Check, using flow
chart C (Refer to P.5-17.)

BRAKES - Anti-lock Braking System Troubleshooting5-14
./
No.Trouble conditionMajor causesRemedyAfter the ignition key is turned to the
l Break in harness for ECU warningCheck, usinflow
“ON” position, it blinks once and then
light drive circuit
chart D. (Re er to9illuminates when it is turned to the
l Malfunction of ECUP.5-18.)“START” position. When the key is
4returned to the “ON” position, the light
blinks again. (Blinking with the ignition
key in the “ON” position is synchronized
with operation noise of the valve relay.)
ABSwarninglighto:-
Ignition
keyACC. LCi+-
14*0593CONTINUED FROM PREVIOUS PAGE
Does the ABS warning light illuminate
when starting to drive the car?
Yes~ Trouble with the motor re-lay, solenoid valve [due toL Check, following trouble
source check charts E-l -self test when driving above
E-6.6 km/h (4 mph)] or malfunc-
NoIs there one-sided braking, insufficient
braking force or malfunction of ABS
operation?
YesTrouble condition
Major causes
One-sided braking
Insufficient braking forcel Mechanical lock of HU solenoid valve
l Hydraulic line in HU is clogged.
Decline in ABS function
(Wheels easily lock when there is sud-
den braking.)
ABS sometimes functions even when
there is no sudden braking. (ABS opera-
tion vibration is transmitted.)
1 tion of wheel speed sensor 1
NoNormall Malfunction in HU solenoid valve op-
erationl Hydraulic line in HU is clogged.
l Insufficient wheel speed sensor out-
put voltage (sensor malfunction, too
large a gap between sensor rotor,
missing rotor teeth or temporarily
broken wire in sensor harness)
l Malfunction of ABS ECU
RemedyCheck HU operation and, if
necessary, replace HU.
If HU is normal, check
structural parts for normal
braking. (Refer to
P.5-7.)Check wheel speed sensor
(Refer to
P.5-82.) and, ifnecessary,replace sensor,
adjust gap or replace rotor.
If tests indicate that there are
no mechanical or electrical
failures, replace the ECU.

possibility that there is trouble with ABS warning
light or with power to the light.probably blown.
MAIN FUSIBLE
LINK @
5-12BRAKES - Anti-lock Braking System TroubleshootingA ABS warning light does not light at all.
I_
[Explanation][Hint]When it does not
liuht ULI at all, there is a strongIf other warning lights do not light up either, fuse is
IGNITIONSWITCH (IG2)IGNITIONSWITCH (IGl)
10A +,
“2.I6
-1z
v,,14TO ABS
I
” IPOWERIs&h ICOMBINAT~~N
ABS ECU
IGND GNDGNDv v vI
-14AO596