Mitsubishi Lancer Evolution VI. Manual - part 73

ABS  – 

Hydraulic Unit

35B-42

REMOVAL SERVICE POINT

A

A

"

HYDRAULIC UNIT ASSEMBLY REMOVAL

Caution
(1) The hydraulic unit assembly is heavy, and so care

should be taken when removing it.

(2) The hydraulic unit assembly is not to be disassembled;

its nuts and bolts should absolutely not be loosened.

(3) The hydraulic unit assembly must not be dropped

or otherwise subjected to impact shocks.

(4) The hydraulic unit assembly must not be turned

upside down or laid on its side.

INSTALLATION SERVICE POINT

"

A

A

BRAKE PIPE CONNECTION

Connect the pipes to the hydraulic unit assembly as shown
in the illustration.
1.

To the proportioning valve (Rear brake LH)

2.

To the proportioning valve (Rear brake RH)

3.

From the master cylinder (Primary)

4.

From the master cylinder (Secondary)

5.

To the front brake (RH)

6.

To the front brake (LH)

1

3

5

2

4

6

ABS  – 

Hydraulic Unit

35B-43

INSPECTION

SOLENOID VALVE CHECK

Measure the resistance between the terminals of the following
solenoid valves.

Standard value:

Solenoid valve IN  8.04 – 9.04 

Ω

Solenoid valve OUT  4.04 – 4.54 

Ω

Solenoid
valve IN

Measurement
terminal

Solenoid
valve OUT

Measurement
terminal

Front (right)

1 – 11

Front (right)

5 – 11

Front (left)

4 – 11

Front (left)

8 – 11

Rear (right)

3 – 11

Rear (right)

7 – 11

Rear (left)

2 – 11

Rear (left)

6 – 11

MOTOR OPERATION CHECK

Connect the battery to the motor and check if the operating
sound is heard.

Caution
Never apply the battery power for more than 1 second.

ABS  – 

Wheel Speed Sensor

35B-44

WHEEL SPEED SENSOR

REMOVAL AND INSTALLATION

Post-installation Operation

D

Wheel Speed Sensor Output Voltage Check 
(Refer to P.35B-35.)

<Front>

<Rear>

25 Nm

25 Nm

1

2

4

3

25 Nm

Front speed sensor removal steps

D

Splash shield

A

A

"

1. Front speed sensor
2. Front ABS rotor

Rear speed sensor removal steps

A

A

"

3. Rear speed sensor
4. Rear ABS rotor

NOTE
The front rotor is integrated with the drive shaft and is not
disassembled.

REMOVAL SERVICE POINT

A

A

"

FRONT SPEED SENSOR / REAR SPEED
SENSOR REMOVAL

Caution
Be careful when handling the pole piece at the tip of
the speed sensor and the toothed edge of the rotor so
as not to damage them by striking against other parts.

Pole piece

Front side

Rear side

ABS  – 

Wheel Speed Sensor

35B-45

INSPECTION

RESISTANCE CHECK BETWEEN SPEED SENSOR
TERMINALS

NOTE
The pole piece can become magnetized because of the
magnet built in the speed sensor, with the result that metallic
foreign material easily adheres to it. Moreover, the pole piece
may not be able to correctly sense the wheel rotation speed
if it is damaged.

1.

Measure the resistance between the speed sensor
terminals.

Standard value: 1.4 – 1.8 k

Ω

If the internal resistance of the speed sensor is not within
the standard value, replace with a new speed sensor.

2.

Check the speed sensor cable for breakage, damage
or disconnection; replace with a new one if a problem
is found.

NOTE
When checking for cable damage, remove the cable clamp
part from the body and then bend and pull the cable
near the clamp to check whether or not temporary
disconnection occurs. Check also that the connector is
free from poor contact, loose terminal, etc.

SPEED SENSOR INSULATION CHECK

1.

Remove all connections from the speed sensor, and then
measure the resistance between terminals (1) and (2)
and the body of the speed sensor.

Standard value: 100 k

Ω

2.

If the speed sensor insulation resistance is outside the
standard value range, replace with a new speed sensor.

ABS ROTOR CHECK

Check whether rotor teeth are broken or deformed, and, if
so, replace the rotor.

Front side

Rear side