1991 MITSUBISHI ECLIPSE Service Manual

BRAKES - Service Adiustment Procedures5-45I
\\14A0416
2314A04.54
BLEEDINGN65FYAN
When the master cylinder is empty of brake fluid, bleed air
from the master cylinder by proceeding with procedures (1)
thru (6). (Because this master cylinder is not equipped with a
check valve.)
When brake fluid remains in the master cylinder, proceed with
step (6).
(1) -Disconnect the brake tube from the master cylinder.
(2) Two persons should conduct the air bleeding, one person
slowly depressing the brake pedal and holding the pedal
depressed.(3) In this condition, the other person should use a finger to
close the outlet part of the master cylinder, and then the
first person should release the brake pedal.
(4) Steps (2) and (3) should be repeated three or four times,
and then the master cylinder should be filled with brake
fluid to the specified level.
NOTE
The air is completely bled from the master cylinder by steps
(1) to (4).
(5) Connect the brake tube to the master cylinder.
(6) Start the engine; then, in the sequence shown in the
illustration, bleed the air from each wheel cylinder.
Specified brake fluid: MOPAR Brake Fluid/
Conforming to DOT3
Caution
1.Use the specified brake fluid. Avoid using a mixture
of the specified brake fluid and other fluid.2. If brake fluid is exposed to the air, it will absorb
moisture; as water is absorbed from the atmos-phere, the boiling point of the brake fluid will
decrease and the braking performance will be
seriously impaired. For this reason, use a hermeti-
cally sealed 1 lit.
(1.06 qt.) or 0.5 lit. (0.52 qt.) brake
fluid container.3. Firmly close the cap of the brake fluid container
after use.
4. For vehicles with the anti-lock braking system, besure to install a filter to the master cylinder
reservoir tank when supplying brake fluid.
ORDINARY AIR-BLEEDING PROCEDURES(1) Depress the brake pedal several times until resistance is
felt; then, with the pedal depressed, loosen the bleeder
screw
l/3 to l/2 turn and then tighten it before the fluid
pressure is all gone.
(2) Release the brake pedal. Repeat this procedure until there
are no more air bubbles in the brake fluid.

5-46BRAKES - Service Adjustment ProceduresWhen new
When worn
14G0017
14LO169
14A0403
\14AO400
FRONT DISC BRAKE PAD CHECK AND REPLACE-
MENiNWFOAF
NOTE
The brake pads have wear indicators that contact the brake discd’when the brake pad thickness becomes 2 mm
(.08 in.), and
emit a squealing sound to warn the driver.
1. Check brake pad thickness through caliper body check
port.Limit: 2.0 mm
(.08 in.)
Caution1. When the limit is exceeded, replace the pads at
both sides, and also the brake pads for the wheelson the opposite side at the same time.
2.If there is a significant difference in the thicknesses
of the pads on the left and right sides, check the
sliding condition of the piston, lock pin sleeve and
guide pin sleeve.
2.Remove lock or guide pin. Lift caliper assembly and retain
with wires.
Caution
Do not wipe off the special grease that is on the guide
-pin or allow it to contaminate the guide pin.
3. Remove the following parts from caliper support.
=Qg@-(4)
(1)
(2)
(3)
(4)Pad and wear
indicator assembly
Pad assembly
Outer shimPad clips
-4. Measure hub torque with pad removed to measure brake
drag torque after pad installation.
NOTETighten the nuts in order to secure the disc to the hub.
5. Securely attach the pad clip to the caliper support.a

BRAKES - Service Adjustment Procedures5-47
14AO399-6. Clean piston and insert into cylinder with tool.
7. Be careful that the piston boot does not become caught,
when lowering the caliper assembly and install the guide
pin.8. Check brake drag torque as follows.
(1) Start engine and hold brake pedal down for 5 seconds.
(2) Stop engine.
(3) Turn brake disc forward
10 times.
(4) Check brake drag torque with spring scale.
If the difference between brake drag torque and hub torqueexceeds the standard value, disassemble piston and clean
the piston. Check for corrosion or worn piston seal, and
check the sliding condition of the lock pin and guide pin.
Standard value: 70
N (15 Ibs.) or less
[4 Nm (3 ftlbs.)] or less
FRONT BRAKE DISC THICKNESS CHECK
NQ5FRASRemove dirt and rust from brake disc surface. Measure disc
thickness at 4 locations or more.
Limit: 22.4 mm
(.882 in.)
Replace the discs and pad assembly for both sides left and
right of the vehicle if they are worn beyond the specified limit.
FRONT BRAKE DISC RUN-OUT CHECKNOIFSAB
1.Remove the caliper support; then raise the caliper assem-
bly upward and secure by using wire.
2. Place a dial gauge approximately 5 mm
(2 in.) from the
outer circumference of the brake disc, and measure the
run-out of the disc.
Limit: 0.08 mm
(.0031 in.)
NOTETighten the nuts in order to secure the disc to the hub.

5-48BRAKES - Service Adjustment Procedures
14A0407FRONT BRAKE DISC RUN-OUT
CORRECTIO&wAB
1.If the run-out of the brake disc is equivalent to or exceeds 5the limit specification, change the phase of the disc and
-’hub, and then measure the run-out again.
(1) Before removing the brake disc, chalk both sides of the
wheel stud on the side at which run-out is greatest.
(2) Remove the brake disc, and then place a dial gauge as
shown in the illustration; then move the hub in the axialdirection and measure the play.
Limit: 0.008 mm
(00031 in.)
If the play is equivalent to or exceeds the limit,
disassemble the hub knuckle and check each part.
(3) If the play does not exceed the limit specification, and
then check the run-out of the brake disc once again.
Mount the brake disc on the position dislocated from
the chalk mark.
ei
2.If the run-out cannot be corrected by changing the phase-ofI’the brake disc, replace the disc.
REAR DISC BRAKE PAD CHECK AND REPLACE-MENT
NO5FUAD
1. Check brake pad thickness through caliper body check
port.Limit: 2.0 mm
(.08 in.)
Caution1. When the limit is exceeded, replace the pads at
both sides, and also the brake pads for the wheelson the opposite side at the same time.
2.If there is a significant difference in the thicknesses
of the pads on the left and right sides, check the
sliding condition of the piston, lock pin sleeve and
guide pin sleeve.
2.Loosen the parking brake cable (from the vehicle interior),
and disconnect the parking brake end installed to the rear
brake assembly.
A
3.Remove lock pin. Lift caliper assembly and retain with -‘wires.
Caution
Do not wipe off the special grease that is on the lockpin or allow it to contaminate the lock pin.

BRAKES - Service Adjustment Procedures5-494. Remove the following parts from caliper support.
14AO405
14AOs
grooves
Q
0 0
Projection
14R0037
14A0401
14AO406
MAO204Outer shim
Pad assembly
Pad clips
CPad clips
B
5.Measure hub torque with pad removed to measure brake
drag torque after pad installation.
NOTETo secure the disc to the hub, tighten the nuts.
6. Securely attach the pad clip to the caliper support.
Caution
Do not deposit grease or other dirt on pad or brake disc
friction surfaces.7. Clean the piston; then use the special tool to thread the
piston into the cylinder.
Be sure, at this time, that the stopper groove of the piston
correctly fits to the projection on the pad’s rear surface.
8. Be careful that the piston boot does not become caught,
when lowering the caliper assembly and install the lock pin.
With the engine running, forcefully depress the brake pedalfive or six times, and then check whether or not the stroke
of the parking brake lever is within the standard value.
If there is a deviation from the standard value, adjust the
stroke of the parking brake lever.
(Refer to
P.5-42.)9. Check brake drag torque as follows.
(1) Start engine and hold brake pedal down for 5 seconds.
(2) Stop engine.
(3) Turn brake disc forward 10 times.
(4) Check brake drag torque with spring scale.
If the difference between brake drag torque and hub torqueexceeds the standard value, disassemble piston and clean
piston. Check for corrosion or worn piston seal, and check
the sliding condition of the lock pin sleeve and guide pin
sleeve.Standard value: 70
N (15 Ibs.) or less
[4 Nm (3 ft.lbs)] or less
REAR BRAKE DISC THICKNESS CHECKNOSWAB
1. Remove dirt and rust from brake disc surface.
2. Measure disc thickness at 4 locations or more.
Limit: 8.4 mm
(.331 in.)
Replace the discs and pad assembly for both sides left andright of the vehicle if they are worn beyond the specified
limit.

5-50BRAKES - Service Adiustment Procedures
14A.0067
MAO409-
REAR BRAKE DISC RUN-OUT CHECKNOSWAB
1.Remove the caliper support, raise the caliper assembly, and Ir.secure it by using a wire, etc.
-u/2. Place a dial gauge approximately 5 mm
(2 in.) from the
outer circumference of the brake disc, and measure the
run-out of the disc.
Limit: 0.08 mm
(.0031 in.)
NOTETo secure the disc to the hub, tighten the nuts.
REAR BRAKE DISC RUN-OUT CORRECTIONNWFXAA
1.If the run-out of the brake disc is equivalent to or exceeds
the limit specification, change the phase of the disc and
hub, and then measure the run-out again.
rc
NOTEThe procedures for checking by changing the installation
phase of the disc are the same as those for the front brakediscs. (Refer to
P.5-48.)
2.If the problem cannot be corrected by changing the phase
of the brake disc, replace the disc.

BRAKES - Service Adjustment Procedures5-51E.C.U. terminal
ILow gear idle condition
[Speed: 5-6 km (3.1-3.16
mph)]Approx.
5V
14A0580When increasing speed
[Speed:
15-20 km (9.3-12.4 mph11OBSERVATION OF WHEEL SPEED SENSOR
OUTPUT VOLTAGE VARIATIONS ABS>N65FOAO
(1) Jack up the vehicle and release the parking brake.
(2) Disconnect the electronic control unit harness connector,
and measure the speed sensor output voltage at the
vehicle side harness connector.
(3) With an AWD model, put the shift lever in
1st (MTT) or L(A/T) position, rotate the wheels and observe the wave
shape for each wheel. With an FWD model, put the shift
lever in
1st (M/T) or L (AiT) position, rotate the wheels and
observe the wave shape for the front wheels; for the rear
wheels, rotate the wheels by hand and monitor the wave
shape.
NOTEIt is also
allright to actually drive the car.
ISpeed sensor
E.C.U. terminal No.I
IFront leftI14-15I
IFront right31-33I
IRear right28-30I
IRear left1 10-11IWhen wheel speed is slow, the output voltage is low
and it gets higher as the speed increases.
Wave shape monitoring points
IS THE OUTPUTVOLTAGE (AMPLITUDE) TOO LOW OR ISTHERE NO OUTPUT VOLTAGE?
If it is too low, check each wheel speed sensor,
With FWD rear wheels, check the sensor gap.
IS THERE VARIATION IN THE WAVE SHAPE AMPLITUDE?
If the flicker of the amplitude is large, consider shaking
of the axle hub.
IS THERE NOISE IN THE WAVE SHAPE OR DISTORTION?Broken or disconnected wire due to vibration or
installation malfunction of the wheel speed sensor.
Check rotor teeth meshing, breaks, etc.
Approx. 1 OV
14A0501

5-52BRAKES - Service Adjustment Procedures
16LO312lOWOO
(1) Remove the ABS power relay from the ABS control unit q
bracket.-/ABS POWER RELAY CHECK
NO5FOAN(2) Connect battery to terminal 2 and check continuity
between terminals with terminal 4 grounded.
Power is supplied
Power is not
supplied
l-3 terminals
1-3 terminals
2-4 terminalsContinuity
No continuity
Continuity
A
IFLAT BATTERY REMEDYNOWOAF
When booster cables are used to start the engine when the
battery is completely flat and then the vehicle is immediately
driven without waiting for the battery to recharge itself to some
extent, the engine may misfire, and driving might not be
possible. This happens because ABS consumes a great
amount of current for its self-check function; the remedy is to
either allow the battery to recharge sufficiently, or to discon-
nect the connector for ABS circuit, thus disabling ABS.
The ABS warning light will illuminate when the connector (for
ABS) is disconnected.
After the battery has sufficiently charged, connect the connec-
tor (for
ABS) and restart the engine; then check to be sure the
ABS warning light is not illuminated.