Daewoo Musso. Manual - part 237

4F-10  ANTILOCK BRAKE SYSTEM

Diagnosis the Flash Code

[Ex]

l

Time Differences of Normal Code 01 : TW1<T<Te<TW2

l

Time Differences of Fault Code 15 : TW1<T<Te<TW2

Time Characteristics

1. Initialization

Tba < 5.0 sec.

Tba 1.8 - 2.2 sec.

2. Output of Fault Code

TW1 = 1.8 - 2.2 sec.

TW2 = 1.8 - 2.2 sec.

T = 0.75 sec., Te 

³

 0.25 sec.

3. Elimination of Fault Code

Tb1 = 5.0 sec.

ANTILOCK BRAKE SYSTEM  4F-11

ABS, ABS/ABD 5.0

Initializing

1. Set the ignition switch n “ON” position.

2. Connect the No.1 terminal (Ground) and the No.13 (ABS)

from diagnosis socket located in E/G room by use of service
connector for 3 - 4 seconds and initialize the flash code.

Notice

Be careful not to connect over 5 seconds.

3. ABS indicator warning light continuously comes on until the

ignition switch is “OFF”.

Dignosis Table

1. When the system is normal

l

One pulse (normal code 01) indicates.

2. When the system is abnormal

l

One pulse (defect code) indicates.

Notice

Repeat the initializing procedure when checking the

defect code Defect code is indicated once for 1 sec (light
on : 0.75 sec, light off : 0.25 sec).

Removal the Defect Code

1. Repair the defect code and remove the memorized defect

code in the ECU.

2. Connect the No. 13 terminal (ABS) from diagnosis socket

and No. 1 terminal (ground) for over 5 seconds.

3. Set the ignition switch in the “OFF” position.

Notice

l

Defect code will be memorized in ECU unless the defect
code is not removed.

l

Repeat the initializing procedure and check the other
defects.

4F-12  ANTILOCK BRAKE SYSTEM

Diagnosis the Flash Code

[ex]

l

Time differences of nromal code 01 : TW1<T<Te<TW2

l

Time differences of fault code 15 : TW1<T<Te<TW2

Time Characteristics

1. Initialization

Tba < 5.0 sec.

Tba 1.8 - 2.2 sec.

2. Output of fault code

TW1 = 1.8 - 2.2 sec.

TW2 = 1.8 - 2.2 sec.

T = 0.75 sec., Te 

³

 0.25 sec.

3. Elimination of fault code

Tb1 = 5.0 sec.

ANTILOCK BRAKE SYSTEM  4F-13

DEFECT CODES

Description

   -

Replace the ECU

l

Check resistance of the wheel speed sensor :

1.280K

W

 - 1.920K

W

l

Check wire for ground and open.

l

Replace the sensor.

l

Check resistance of the wheel speed sensor :

1.280K

W

 - 1.920K

W

l

Check wire for ground and open.

l

Replace the sensor.

l

Check resistance of the wheel speed sensor :

1.280K

W

 - 1.920K

W

l

Check wire for ground and open.

l

Replace the sensor.

l

Check resistance of the wheel speed sensor :

1.280K

W

 - 1.920K

W

l

Check wire for ground and open.

l

Replace the sensor.

l

Check wire for ground and open.

l

Check connection of the wheel speed sensor connec-

tor and ECU side connector.

l

Measure air gap between wheel teeth and wheel speed

sensor and check installation of wheel tooth.

(Standard air gap : 0.35 - 1.60 mm)

l

Check output voltage of the sensor by rotating the

wheel 1/2 - 1 revolution per second and shaking sen-

sor wire.

-

When measured by multi - meter (AC) :

output voltage > 70 mV

-

When measured in oscilloscope :

output voltage 

³

 120 mV/P-P

l

Replace the sensor.

l

Check wire for ground and open.

l

Check connection of the wheel speed sensor. con-

nector and ECU side connector.

l

Measure the air gap between wheel teeth and wheel

speed sensor and check installation of wheel tooth.

(Standard air gap : 0.35 - 1.60 mm)

l

Check output voltage of the sensor by rotating the

wheel 1/2 - 1 revolution per second and shaking sen-

sor wire.

Defect Code

01

02

03

04

05

06

07

08

Application

Normal

Defective ECU

Front/left Wheel Speed

Sensor (Wire)

Front/right Wheel Speed

Sensor (Wire)

Rear/left Wheel Speed

Sensor (Wire)

Rear/right Wheel Speed

Sensor (Wire)

Front/left Wheel Speed

Sensor (Signal)

Front/right Wheel Speed

Sensor (Signal)