Daewoo Musso. Manual — part 238
4F-14 ANTILOCK BRAKE SYSTEM
Description
-
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.
(Standard air gap : 0.15 - 1.20 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 air gap between wheel teeth and wheel
speed sensor and check installation of wheel tooth.
(Standard air gap : 0.15 - 1.20 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 number of teeth on the wheel rotor and its
condition.
-
Number of teeth : 52
l
Check valve relay voltage.
l
Check connection of connector and terminals in the
ECU and hydraulic modulator.
l
Check ground.
l
Check terminals for open or short.
(When connector is removed)
l
Replace the hydraulic modulator.
Defect Code
09
10
11
12
Application
Rear/left Wheel Speed
Sensor (Signal)
Rear/right Wheel Speed
Sensor (Signal)
Wheel Rotor
Valve Relay
ANTILOCK BRAKE SYSTEM 4F-15
Description
l
Check each valve by using SCANNER's solenoid valve
overriding function.
l
Check connection of connector and terminals in the
ECU hydraulic modulator.
l
Check each valve by using SCANNER's solenoid valve
overriding function.
l
Check connection of connector and terminals in the
ECU hydraulic modulator.
l
Check terminals for open or short.
(When connector is removed)
l
Replace the hydraulic modulator.
l
Check each valve by using SCANNER's solenoid valve
overriding function.
l
Check connection of connector and terminals in the
ECU hydraulic modulator.
l
Check terminals for open or short.
(When connector is removed)
l
Replace the hydraulic modulator.
l
Check each valve by using SCANNER's solenoid valve
overriding function.
l
Check connection of connector and terminals in the
ECU hydraulic modulator.
l
Check terminals for open or short.
(When connector is removed)
l
Replace the hydraulic modulator.
l
Check each valve by using SCANNER's solenoid valve
overriding function.
l
Check connection of connector and terminals in the
ECU hydraulic modulator.
l
Check terminals for open or short.
(When connector is removed)
l
Replace the hydraulic modulator.
l
Check each valve by using SCANNER's solenoid valve
overriding function.
l
Check connection of connector and terminals in the
ECU hydraulic modulator.
l
Check terminals for open or short.
(When connector is removed)
l
Replace the hydraulic modulator.
l
Check each valve by using SCANNER's solenoid valve
overriding function.
l
Check connection of connector and terminals in the
ECU hydraulic modulator.
l
Check terminals for open or short.
Application
Front / left INLET Valve
Front / left OUTLET Valve
Front / right INLET Valve
Front / right OUTLET Valve
Rear / left INLET Valve (ABD)
Rear / left OUTLET Valve
Rear / Right INLET Valve
Defect Code
13
14
15
16
17
18
19
4F-16 ANTILOCK BRAKE SYSTEM
Description
l
Check terminals for open or short.
(When connector is removed)
l
Replace the hydraulic modulator.
l
Check each valve by using SCANNER's solenoid valve
overriding function.
l
Check connection of connector and terminals in the
ECU hydraulic modulator.
l
Check terminals for open or short.
(When connector is removed)
l
Replace the hydraulic modulator
l
Check solenoid internal resistance of the prime(ASV)
valve and pilot valve(USV) : 8.04 - 9.04
W
l
Check each valve by using SCANNER's solenoid valve
overriding function.
l
Check connection of connector and terminals in the
ECU and hydraulic modulator.
l
Check terminals for open or short.
(When connector is removed)
l
Replace the hydraulic modulator
l
Check solenoid internal resistance of the prime(ASV)
valve and pilot valve(USV) : 8.04 - 9.04
W
l
Check each valve by using SCANNER's solenoid valve
overriding function.
l
Check connection of connector and terminals in the
ECU and hydraulic modulator.
l
Check terminals for open or short.
(When connector is removed)
l
Replace the hydraulic modulator
l
Check each valve by using SCANNER's pump motor
overriding function.
l
Check resistance between pump motor ground ter-
minal and battery negative terminal : total resistance
should be less than 15 m
W
l
Check body ground location.
l
Check relay supply voltage : IGN on : 11 - 14 V
l
Relay coil internal resistance : 70 - 80
W
l
Replace the hydraulic modulator
l
Check by using SCANNER's stop lamp switch diag-
nosing function from sensor value output function.
l
Check connection of ECU connector side stop lamp
switch terminal.
l
Check resistance of the stop lamp, switch.
-
Each end resistance value of the switch
Application
Rear / Right OUTLET Valve
Function and Response of The
Valve
Function and Response of The
Valve
Motor Relay / Circulation Pump
Stop Lamp Switch
Defect Code
20
21
22
24
27
ANTILOCK BRAKE SYSTEM 4F-17
Application
Power Voltage
Residual Temperature
Measurement (ABD only)
Acceleration Sensor Signal (wire)
Defect Code
28
29
42
Description
when switch knob (planger) is pressed by 3mm :
¥
-
Each ends resistance value of the switch when
switch knob(plunger) is not pressed :
less than 200 m
W
l
When brake is applied :
ECU (ABS:No.14, ABD:No.48) terminal 11 - 14 V
or VBattery.
When brake is released :
ECU (ABS:No.14, ABD:No.48) terminal 0 V
l
Check battery voltage.
l
Resistance between ECU (ABD:No.28 & 29,
ABS:No.19) pins and battery negative terminal :
less than 20 m
W
l
Resistance between ECU No.1 (ABS:NO.15) pin and
ignition terminal : less than 60 m
W
l
Check that normal voltage is applied to ECU
(ABD:No.1, ABS:No.15) pin when ignition switch is
turned to "ON" or "OFF".
l
Check ABS fuses of 15A and 80A.
l
Replace the ECU.
l
Check wire (ECU No.50) for open or loose contact.
l
Check connection between connectors.
l
Check relevant wires for open or short.
(When connector is removed)
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.43, ABS:No.28 pin
and ABD:No.39, ABS:No.30 pin)
: 4.75 - 5.25 V
-
Signal voltage between ECU (ABD:No.51,
ABS:No.10) pin and (ABD:No.39, ABS:No.30) pin
: 1.95 V - 3.45 V
(Measure it by laying acceleration sensor horizon-
tally and without external force)
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