Mitsubishi Lancer Evolution 7. Manual — part 323
ABS <4WD> -
Hydraulic Unit and ABS-ECU
35B-31
<R.H. drive vehicles>
Pre-removal Operation
D
Strut Tower Bar Removal (Refer to GROUP 42.)
D
Brake Fluid Draining
D
Air Intake Hose and Air Cleaner Removal
Post-installation Operation
D
Brake Fluid Supplying and Brake Line Bleeding
(Refer to GROUP 35A - On-vehicle Service.)
D
Hydraulic Unit Check (Refer to P.35B-28.)
D
Air Intake Hose and Air Cleaner Installation
D
Strut Tower Bar Installation (Refer to GROUP 42.)
2
1
3
4
2
2
2
15 ± 2 N·m
25 ± 6 N·m
25 ± 6 N·m
Removal steps
A
A"
1. Harness connector
"
AA 2. Brake pipe connection
A
B"
3. Hydraulic unit and ABS-ECU
4. Hydraulic unit bracket assembly
ABS <4WD> -
Hydraulic Unit and ABS-ECU
35B-32
REMOVAL SERVICE POINTS
A
A" HARNESS CONNECTOR DISCONNECTION
Move the lock lever of the ABS-ECU connector as shown
in the illustration, and then disconnect the harness connector.
A
B" HYDRAULIC UNIT AND ABS-ECU 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
"
AA BRAKE PIPE CONNECTION
Connect the pipes to the hydraulic unit assembly as shown
in the illustration.
1. From the master cylinder (Secondary)
2. To the front brake (LH)
3. To the rear brake (RH)
4. To the rear brake (LH)
5. To the front brake (RH)
6. From the master cylinder (Primary)
Lock lever
1
2
3
4
5
6
ABS <4WD> -
Wheel Speed Sensor
35B-33
WHEEL SPEED SENSOR
REMOVAL AND INSTALLATION
Caution
If the vehicle is equipped with the Brembo disc brake, during maintenance, take care not to contact
the parts or tools to the caliper because the paint of caliper will be scratched. And if there is
brake fluid on the caliper, wipe out quickly.
Post-installation Operation
Wheel Speed Sensor Output Voltage Check
(Refer to P.35B-26.)
1
2
1
2
<FRONT>
<REAR>
25 ± 6 N·m
25 ± 6 N·m
25 ± 6 N·m
Removal steps
A
A" "AA 1. Wheel speed sensor
2. ABS rotor
(Refer to GROUP 26/27 - Drive Shaft.)
NOTE
The ABS rotors are integrated with the drive shaft
and cannot be disassembled.
REMOVAL SERVICE POINT
A
A" WHEEL SPEED SENSOR REMOVAL
Caution
Do not strike the pole piece at the tip of the wheel speed
sensor against the ABS rotor tooth surface or other parts
when removing the wheel speed sensor.
<FRONT>
<REAR>
ABS <4WD> -
Wheel Speed Sensor
35B-34
INSTALLATION SERVICE POINT
"
AA WHEEL SPEED SENSOR <REAR>
INSTALLATION
Install the wheel speed sensor crossing with the parking brake
cable.
INSPECTION
CHECK OF RESISTANCE BETWEEN WHEEL SPEED
SENSOR TERMINALS
Caution
The pole piece can become magnetized because of the
magnet built into the wheel speed sensor, with the result
that metallic foreign material easily adheres to it.
Moreover, the pole piece may not be able to function to
correctly sense the wheel rotation speed if it is damaged.
1. Measure the resistance between the wheel speed sensor
terminals.
Standard value: 1.24 - 1.64 kΩ
If the internal resistance of the wheel speed sensor is
not within the standard value, replace with a new wheel
speed sensor.
2. Check the wheel 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. Also check the connection of the
connector and that the terminals are inserted correctly.
ABS ROTOR CHECK
Check whether ABS rotor teeth are broken or deformed, and,
if so, replace the ABS rotor.
WHEEL SPEED SENSOR INSULATION INSPECTION
1. Remove all connections from the wheel speed sensor,
and then measure the resistance between terminal 1 and
the body of the wheel speed sensor, and terminal 2 and
the body of the wheel speed sensor.
Standard value: 100 kΩ or more
2. If the speed sensor insulation resistance is outside the
standard value range, replace with a new speed sensor.
Wheeel speed sensor <rear>
Parking brake cable
<FRONT>
<REAR>
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