Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual — part 589

ON-VEHICLE SERVICE

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-47

HYDRAULIC UNIT CHECK

M1352001700084

Required Special Tool:
MB991502: Scan Tool (MUT-II)

CAUTION

•

The roller of the braking force tester and the tire should
be dry during testing.

•

When testing the front brakes, apply the parking brake.
When testing the rear brakes, stop the front wheels
with chocks.

1. Jack up the vehicle. Then support the vehicle with rigid

racks at the specified jack-up points or place the front or rear
wheels on the rollers of the braking force tester.

2. Release the parking brake, and feel the drag force (drag

torque) on each road wheel. When using the braking force
tester, take a reading of the brake drag force.

CAUTION

To prevent damage to scan tool MB991502, always turn the
ignition switch to the "LOOK" (OFF) position before
connecting or disconnecting scan tool MB991502.
3. Turn the ignition switch to the "LOCK" (OFF) position and

set scan tool MB991502 as shown in the illustration.

4. After checking that the shift lever <M/T> or the selector lever

<A/T> is in neutral, start the engine.

5. Use scan tool MB991502 to force-drive the actuator.

NOTE: The ABS system will switch to the scan tool mode
and the ABS warning light will illuminate.

NOTE: When the ABS has been interrupted by the fail-safe
function, scan tool MB991502 actuator testing cannot be
used.

AC001252AF

16 PIN

MB991502

AC000954AB

SCAN TOOL ACTUATOR TEST
(ITEM NO.01, 02, 03, 04) START

1 s

2 s

3 s

DEPRESSED

RELEASED

PRESSURE INCREASE

PRESSURE DECREASE

PRESSURE HOLD

LOCK

DRAG FORCE
WHEN THE
PEDAL IS FREE

PEDAL
OPERATION

SOLENOID
VALVE
POSITION

CHECKING
THE BRAKE
FORCE

ON-VEHICLE SERVICE

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-48

6. Turn the wheel by hand and check the change in braking

force when the brake pedal is depressed. When using the
braking force tester, depress the brake pedal until the
braking force is at the following values, and check that the
braking force changes to the brake drag force inspected in
step 2 when the actuator is force-driven. The result should
be as shown in the diagram above.

7. If the result of inspection is abnormal, repair according to the

Diagnosis Table below.

8. After inspection, disconnect the scan tool immediately after

turning the ignition switch to the "LOCK" (OFF) position.

DISCHARGED BATTERY

M1352003500097

The ABS system consumes a large amount of battery current
for its self-check function. If the battery is completely
discharged and booster cables are used to start the engine, the
engine must be allowed to idle for a few minutes to recharge. If
the battery does not recharge, the engine may misfire or stall.
To prevent this condition,

•

allow the engine to idle for a few minutes before driving the
vehicle, or

•

temporarily disable the ABS system by removing the fusible
link for the ABS circuit. The ABS warning light will illuminate
when the ABS fusible link is removed. After the battery is
recharged, reinstall the ABS fusible link and check that the
ABS warning light is not illuminated.

Front wheel

785

−

981 N (176

−

220 lb.)

Rear wheel

588

−

784 N (132

−

176 lb.)

DIAGNOSIS TABLE

NO.

OPERATION

NORMAL
CONDITION

ABNORMAL
CONDITION

PROBABLE
CAUSE

REMEDY

01

1. Depress brake pedal

to lock wheel.

2. Using scan tool

MB991502, select the
wheel to be checked
and force the actuator
to operate.

3. Turn the selected

wheel manually to
check the change of
brake force.

Brake force
released for
three locking.

Wheel does not
lock when brake
pedal is
depressed.

Clogged brake
line other than
hydraulic unit

Check and clean
brake line

02

Clogged
hydraulic circuit
in hydraulic unit

Replace
hydraulic unit
assembly

03

Brake force is
not released

Incorrect
hydraulic unit
brake tube
connection

Connect
correctly

04

Hydraulic unit
solenoid valve
not functioning
correctly

Replace
hydraulic unit
assembly

ACX02443

ACX02443AE

BATTERY

FUSIBLE
LINK

MASTER CYLINDER AND BRAKE BOOSTER

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-49

M A STER C YLIN D ER A N D BR AK E BO O STER

REMOVAL AND INSTALLATION

M1352004000062

Refer to GROUP 35A, Master Cylinder and Brake
Booster

P.35A-32

.

MASTER CYLINDER

M1352004500067

DISASSEMBLY AND ASSEMBLY

CAUTION

Do not disassemble the primary and secondary piston assemblies.

AC000955

1

2

3

4

7

6

5

8

9

13

N

12

11

N

N

12

11

N

10

N

<VEHICLES WITHOUT TCL>

<VEHICLES WITHOUT TCL>

<VEHICLES WITH TCL>

<VEHICLES WITH TCL>

12

11

10

11

12

13

BRAKE FLUID:
CONFORMING TO DOT3 OR DOT4

BRAKE MASTER CYLINDER KIT

AC

DISASSEMBLY STEPS

1. RESERVOIR CAP ASSEMBLY
2. RESERVOIR CAP
3. DIAPHRAGM
4. FILTER
5. SPRING PIN
6. BRAKE FLUID LEVEL SENSOR
7. RESERVOIR

8. RESERVOIR SEAL
9. PIN

<<A>>

10. PISTON STOPPER RING
11. PRIMARY PISTON ASSEMBLY
12. SECONDARY PISTON ASSEMBLY
13. MASTER CYLINDER BODY

DISASSEMBLY STEPS (Continued)

MASTER CYLINDER AND BRAKE BOOSTER

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-50

DISASSEMBLY SERVICE POINT

<<A>> PISTON STOPPER RING DISASSEMBLY
While depressing the piston, remove the piston stopper ring.

INSPECTION

M1352004600064

•

Check the inner surface of the master cylinder body for
corrosion or pitting.

•

Check the primary and secondary pistons for corrosion,
scoring, wear or damage.

•

Check the diaphragm for cracks and wear.

AC000903