Daewoo Musso. Manual — part 237
4F-10 ANTILOCK BRAKE SYSTEM
Diagnosis the Flash Code
[Ex]
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Time Differences of Normal Code 01 : TW1<T<Te<TW2
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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
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One pulse (normal code 01) indicates.
2. When the system is abnormal
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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
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Defect code will be memorized in ECU unless the defect
code is not removed.
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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
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Check resistance of the wheel speed sensor :
1.280K
W
- 1.920K
W
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Check wire for ground and open.
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Replace the sensor.
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Check resistance of the wheel speed sensor :
1.280K
W
- 1.920K
W
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Check wire for ground and open.
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Replace the sensor.
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Check resistance of the wheel speed sensor :
1.280K
W
- 1.920K
W
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Check wire for ground and open.
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Replace the sensor.
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Check resistance of the wheel speed sensor :
1.280K
W
- 1.920K
W
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Check wire for ground and open.
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Replace the sensor.
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Check wire for ground and open.
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Check connection of the wheel speed sensor connec-
tor and ECU side connector.
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Measure air gap between wheel teeth and wheel speed
sensor and check installation of wheel tooth.
(Standard air gap : 0.35 - 1.60 mm)
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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
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Replace the sensor.
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Check wire for ground and open.
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Check connection of the wheel speed sensor. con-
nector and ECU side connector.
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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)
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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)
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