Daewoo Musso. Manual - part 239

4F-18  ANTILOCK BRAKE SYSTEM

Application

Defect Code

Description

l

Check connection between connectors.

l

Check relevant wires for open or short.

(When connector is removed)

l

Check and replace the acceleration sensor.

l

Replace the ECU.

l

Check voltage between ECU side ground (ABD:No.1,

ABS:No.15 pin) and acceleration sensor side ground

(ABD:No.1, ABS:No.15 pin / ECU side ABD:No.39,

ABS:No.30 pin)

(When connector is installed and power is applied)

-

Voltage : less than 0.25 V

l

Check voltage among related terminals.

(When connector is installed and power is applied)

-

Voltage between ECU (ABD:No.51, ABS:No.10

pin and ABD:No39, ABS:No.30) pin

: 4.75 - 5.25 V

-

Signal voltage between ECU (ABD:No.51,

ABS:No.10 pin and ABD:No39, ABS:No.30) pin

: 1.95 V - 3.45 V

(Measure it by laying acceleration sensor horizon

tally and without external force)

43

Acceleration Sensor Signal (Signal)

ANTILOCK BRAKE SYSTEM  4F-19

MAINTENANCE AND REPAIR

ON-VEHICLE SERVICE

WHEEL SPEED SENSOR

1 Bolt
2 Front Wheel Speed Sensor
3 Knuckle

4 Bolt
5 Rear Wheel Speed Sensor
6 Rear Axle

4F-20  ANTILOCK BRAKE SYSTEM

Removal & Installation Procedure

ABS Hydraulic Unit

1. Release the ABS wiring connector locking lever in arrow

direction and remove the connector.

Notice

l

Do not force the connector when releasing in arrow

direction.

l

For installation of the connetor, align and  firmly seat

the connector of the hydraulic unit and wiring connector
while keeping the locking lever upward and then push it
down.

2. Remove the hydraulic lines of the hydraulic unit.

During removal, be careful not to drip brake fuid on the
body.

Installation Notice

3. Unscrew hydraulic unit mounting nuts (2EA) and remove

the unit from the bracket.

Installation Notice

Tightening  Torque

9 - 12 Nm

Removal of the ABS / ABD Unit
Location : Under the front passenger's seat.

1. Remove the wiring connector of the ABS/ABD(or

ABS:attached type) ECU.

2. Remove the ground wire.

3. Unscrew the mounting bolts and remove the ECU.

4. Installation should follow the removal precedure in reverse

order.

Tightening Torque

12 - 16 Nm

Notice

When carrying a new unit, never recline it over 30°.

ANTILOCK BRAKE SYSTEM  4F-21

HYDRAULIC CIRCUIT

ABS 5.3

Pressure Increased

1 Master Cylinder
2 Hydraulic Unit
3 Damping Chamber
4 Return Pump
5 Return Pump Motor

6 Accumulator Chamber
7 Inlet Valve for Each Wheel
8 Outlet Valve for Each Wheel
9 Front Wheel

10 Rear Wheel