Mitsubishi Eclipse. Technical Information Manual (1994) - part 62

DRIVE-CONTROL COMPONENTS   Service Brakes

DISC BRAKES

Either single- or double-piston type disc brakes are
used for the front wheels, and the single-piston type

disc brakes are used for the rear wheels.

l 

Drum in-disc brakes with dedicated parking

brake shoes and drum.

<Double-piston type>

<Single-piston type>

Shoe-to-lever

 

 

assembly

Parking brake

cable

l 

The outer disc system, which jointly tightens

the wheel and brake disc, improves serviceabili-
ty-

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For improved safety, the brake pad employs

an audible wear indicator (inside the body).

 indicator>

 

 

 

REAR DRUM BRAKES

The rear drum brakes are 205 mm (8 in.)-diameter

leading-trailing type brakes which always provide
stable braking during a forward or reverse move-
ment.

The drum brakes incorporates an automatic adjuster

mechanism which automatically adjusts the shoe

clearance when the brake pedal is depressed.

Retainer spring

 

    A B S  

 

 

 

 

The ABS used in the 1995 Eclipse is similar to

the previous one.
The ABS is a brake system which detects skids
that could be caused by abrupt brake application
or by brake application on a slippery road surface,
and adequately controls the brake fluid pressure
to prevent skids caused by locked wheels. It assures
directional stability and steerability during brake 

 and reduces the brake stopping distance.

The basic principles and effects of the ABS are
the same as those of the conventional system.

The major features of the ABS are described below.

l

When a failure occurs in the system, you can

identify the faulty area in the diagnostic test
mode. The failure data stored in memory is
not erased even if the ignition switch is placed
in the OFF position. Use of the scan tool enables

you to read the diagnostic trouble code or clear
the memory. In addition, you can read the sensor
data (data list) stored in the electronic control

unit (ECU) and test the hydraulic unit (HU) and
other actuators. (Refer to P. 3-43.)

Sensor

Part name

Wheel speed sensor

Stop light switch

No.

Function

1

Sends an AC signal with a frequency proportional to the ro-

tating speed of the individual wheel to the ABS-ECU.

2

Sends a signal to the ABS-ECU indicating whether the
brake pedal is pressed or not.

Hydraulic unit (HU)

Controls braking pressure for each wheel depending on the

3

signal from the ABS-ECU.

Includes built-in plunger valve

Actuator

Motor relay

Valve relay

4

Closes contact in response to a signal from the ABS-ECU to
allow the power to be supplied to the motor in the HU.

5

Is turned ON by the ABS-ECU signal and supplies power to

the solenoid valve in HU.

ABS warning light

6

Is in the combination meter and lights up when there is

trouble in ABS.

Data link connector

Electronic control unit (ECU)

7

Outputs diagnostic trouble codes.

Controls the actuators such as HU according to the signals
from the individual sensors.

DRIVE-CONTROL COMPONENTS   ABS 

SYSTEM DRAWING

Rear solenoid valve

Wheel speed sensor (FL)

FL solenoid valve

Wheel speed sensor (FR)

FR solenoid valve

Wheel speed sensor (RR)

I

 speed sensor 

 

ABS valve relay

ABS motor relay

 valve relay response 

ABS-ECU

 

ECU power supply

light

I I

Front right wheel (FR)

.

 I. . . . .

 

Rear right wheel (RR)

sensor

I

 

 

 

 

Front left wheel (FL)

sensor 

speed

Rear left wheel 

 

    A B S  

ABS ELECTRICAL CIRCUIT DIAGRAM

Ignition

switch IG2

ABS-ECU

1

Dedicated

fuse

Hydraulic
unit 

ABS

motor
relay

18

Combination
meter

I

26

Dedicated

fuse

Stop light
switch

valve power

supefvision

 

 

 

FR

RL

Wheel speed sensor

28 30

RR

23 24

Data link

connector

1

2

3

4

5

6

7

8

9 10 11 12 13 14 15 16 17 18

19~20~21~22~23~24~25~26~27~28~29~30~31~32~33~34~35

ABS-ECU Connector Pin Configuration