2003 DAEWOO MATIZ Ignition

4F–4 ANTILOCK BRAKE SYSTEM
DAEWOO M-150 BL2
feed back to the master cylinder and brake pedal.
D107E005
Return Pump Motor
The motor drives two pump elements through the ec-
centric wheel on its shaft.
Return Pump
Description: Each pump element consists of a fixed
displacement piston driven by an eccentric on the end of
the eccentric motor. It has two check valves (inlet and
outlet) and is fed with fluid by the low pressure accumu-
lator.
Operation:
Compression stroke: the pump is filled via the inlet ball
seat, then the motor eccentric rotates moving the piston
to displace the fluid. After the pressure build-up closes
the inlet valve the piston displacement increases the
pressure until the outlet ball opens. The outlet pressure
will continue to increase for the rest of the piston stroke.
Return Stroke: The piston retracts, forced by its spring,
as the motor eccentric returns to its low end position.
The pressure at the inlet side of the outlet ball then de-
creases due to the displaced volume and the pressure
difference across this ball holds it closed.
The pressure at the outlet side of the inlet ball seat,
which is set to open at a certain pressure level also de-
creases until this valve opens. With the outlet ball
closed, the pump is filled with additional fluid from the
low pressure accumulator.
The pressure will continue until a stall point is reached
and compression of the piston cannot generate enough
differential pressure anymore to open the outlet ball
seat.
D17E006A
Return Pump
Return Pump
Motor(0.12~0.16 in.)
EBCM (ELECTRONIC BRAKE
CONTROL MODULE)
Notice: There is no serviceable. The EBCM must be re-
placed as an assembly.
The EBCM is attached to the hydraulic unit in the engine
compartment. The controlling element of ABS is a mi-
croprocessor-based EBCM. Inputs to the system in-
clude the four wheel speed sensors, the stoplamp
switch, the ignition switch, and the unswitched battery
voltage. There is an output to a bi-directional serial data
link, located in pin M of the assembly line diagnostic link
(ALDL), for service diagnostic tools and assembly plat
testing.
The EBCM monitors the speed of each wheel. If any
wheel begins to approach lockup and the brake switch is
closed (brake pedal depressed), the EBCM controls the
dump valve to reduce brake pressure to the wheel ap-
proaching lockup. Once the wheel regains traction,
brake pressure is increased until the wheel again begins
to approach lockup. The cycle repeats until either the
vehicle comes to a stop, the brake pedal is released or
no wheels approach lockup.
Additionally, the EBCM monitors itself, each input (ex-
cept the serial data link), and each output for proper op-
eration. If it detects any system malfunction, the EBCM
will store a DTC in nonvolatile memory (DTCs will not
disappear if the battery is disconnected).

4F–12 ANTILOCK BRAKE SYSTEM
DAEWOO M-150 BL2
VISUAL IDENTIFICATION
EBCM CONNECTOR FACE VIEW
Terminal 9 is identified as they appear from the wire entry end of the harness connector.
EBCM Connector
D107E204
 
 Pin
 
 Signal Name
 
 Color
 
 Circuit
 2 ROUGH ROAD GRY/YEL Buffered Wheel Speed Signal : to ECM–55
(Sirius D3)
 
9
 
RRWSHI
 
BRN
 
Right Rear Wheel Speed High 
 10
 
 RRWSLO
 
 WHT
 
 Right Rear Wheel Speed Low
 11 SDLUART BRN/DK GRN Serial Data Link
 12 RFWSHI DK GRN/BLK Right Front Wheel Speed High
 13 RFWSLO BRN/DK GRN Right Front Wheel Speed Low
 14 LFWSHI DK BLU Left Front Wheel Speed High
 15 IGN RED/YEL Switched Ignition
 16 GND BLK Negative Battery Terminal 17 BATT RED Battery 18 BATT RED Battery 
 19
 
 GND
 
 BLK
 
 Negative Battery Terminal
 20 ABSWARN DK GRN/GRY ABS Warning Indicator
 22 LRWSHI BLK Left Rear Wheel Speed High
 23 LRWSLO RED Left Rear Wheel Speed Low
 24 BRAKESW YEL Brake Switch
 25 LFWSLO YEL Left Front Wheel Speed Low

ANTILOCK BRAKE SYSTEM 4F–17
DAEWOO M-150 BL2
intrusion exists, replace the wheel speed sensor har-
ness. If replacing a wheel speed sensor harness, in-
spect the sensor terminals. If you find evidence of
corrosion or water intrusion, replace the wheel speed
sensor. Refer to “Front Wheel Speed Sensor” in this
section.Important: Wheel speed sensor intermittent malfunc-
tions may be difficult to locate. Take care not to disturb
any electrical connections before performing an indi-
cated step of this table. That will ensure that an intermit-
tent connection will not be corrected before the source
of the malfunction is found.
DTC 0354 – Left Front Wheel Speed Sensor Circuit Open or Shorted
 Step Action Value(s) Yes No
 
 
 
 
 
 
 
1
 
 
 
 
 
 
 
1. Turn the ignition switch to OFF.
2. Disconnect the EBCM harness connector from
the EBCM.
3. Use a digital voltmeter (DVM) to measure the
resistance between terminals 14 and 25 of
connector on the EBCM harness.
Is the resistance within the specified value? 
 
 
 
 
 
 
1.0 k
to
1.5 k

 
 
 
 
 
 
 
Go to Step 4
 
 
 
 
 
 
 
Go to Step 2
 
 
 
 
 
2
 
 
 
 
 
1. Disconnect the harness from the left front wheel
speed sensor.
2. Use a DVM to measure the resistance between
terminals 1 and 2 of the left front wheel speed
sensor connector.
Is the resistance within the specified value? 
 
 
 
 1.0 k
to
1.5 k

 
 
 
 
 Go to Step 4
 
 
 
 
 Go to Step 3
 
 3
 
 Replace the wheel speed sensor.
Is the repair complete?
 
 –
 
 System OK
 
 –
 
 
 
 
4
 
 
 
 
Use a DVM to measure the resistance between ter-
minal 14 of the EBCM harness connector, and termi-
nal 1 of the left front wheel speed sensor harness
connector.
Is the resistance within the specified value? 
 
 
 
less than 1

 
 
 
 
Go to Step 6
 
 
 
 
Go to Step 5 
 
 
 
5
 
 
 
 
1. Repair the high resistance in circuit DK BLU.
2. If the wheel speed sensor harness is damaged,
replace it.
Is the repair complete?
 
 
 
 
–
 
 
 
 System OK
 
 
 
 
–
 
 
 
 
6
 
 
 
 
Use a DVM to measure the resistance between ter-
minal 25 of the EBCM harness connector, and termi-
nal 2 of the left front wheel speed sensor harness
connector.
Is the resistance within the specified value? 
 
 
 less than 1

 
 
 
 Go to Step 8
 
 
 
 Go to Step 7 
 
 
 
7
 
 
 
 
1. Repair the high resistance in circuit YEL.
2. If the wheel speed sensor harness is damaged,
replace it.
Is the repair complete? 
 
 
 
–
 
 
 
 System OK
 
 
 
 
–
 
 8
 
 
Use a DVM to measure the resistance between
ground and terminal 14 of the EBCM connector.
Does the DVM show the specified value? 
 

 
 Go to Step 10
 
 Go to Step 9 
 9
 
 Repair the short to ground in circuit DK BLU.
Is the repair complete? 
 –
 
 System OK
 
 –

4F–18 ANTILOCK BRAKE SYSTEM
DAEWOO M-150 BL2
DTC 0354 – Left Front Wheel Speed Sensor Circuit Open or Shorted (Cont’d)
 Step Action Value(s) Yes No
 
 10
 
 
Use a DVM to measure the resistance between
ground and terminal 25 of the EBCM connector.
Does the DVM show the specified value? 
 


 
 
Go to Step 12
 
 
Go to Step 11 
 11
 
 Repair the short to ground in circuit YEL.
Is the repair complete?
 
 –
 
 System OK
 
 –
 
 
 
 
 
12
 
 
 
 
 
1. Reconnect all of the connectors.
2. Turn the ignition to ON.
3. Use a DVM to measure the voltage between
ground and terminal 14 of EBCM connector.
Is the voltage within the specified value? 
 
 
 
 0 v
 
 
 
 
 Go to Step 14
 
 
 
 
 Go to Step 13
 
 13 
 
Repair the short to voltage in circuit DK BLU.
Is the repair complete? 
 – 
 System OK
 
 –
 
 14
 
 
Use a DVM to measure the voltage between ground
and terminal 25 of EBCM connector.
Is the voltage within the specified value? 
 0 v
 
 Go to Step 16
 
 Go to Step 15 
 15
 
 Repair the short to voltage in circuit YEL.
Is the repair complete? 
 –
 
 System OK
 
 –
 
 16
 
 
Replace the EBCM.
Is the repair complete? 
 –
 
 System OK
 
 –

ANTILOCK BRAKE SYSTEM 4F–21
DAEWOO M-150 BL2
sensor. Refer to “Front Wheel Speed Sensor” in this
section.
Important: Wheel speed sensor intermittent malfunc-
tions may be difficult to locate. Take care not to disturbany electrical connections before performing an indi-
cated step of this table. That will ensure that an intermit-
tent connection will not be corrected before the source
of the malfunction is found.
DTC 0355 – Left Front Wheel Speed Sensor poor air Gap or Missing Tooth Ring
 Step Action Value(s) Yes No
 
 
 
 
 
 
 
 
1
 
 
 
 
 
 
 
 
1. Turn the ignition switch to OFF.
2. Physically inspect the following components for
damage.

Wheel speed sensor is loose.

The air gap exceeds the required specifica-
tions.

The speed ring is missing or damaged.
3. Repair or replace the damaged.
Is the repair complete? 
 
 
 
 
 
 
 
–
 
 
 
 
 
 
 
 System OK
 
 
 
 
 
 
 
 Go to Step 2
 
 2 
 
Replace the EBCM.
Is the repair complete? 
 – 
 System OK
 
 –

ANTILOCK BRAKE SYSTEM 4F–23
DAEWOO M-150 BL2
intrusion exists, replace the wheel speed sensor har-
ness. If replacing a wheel speed sensor harness, in-
spect the sensor terminals. If you find evidence of
corrosion or water intrusion, replace the wheel speed
sensor. Refer to “Front Wheel Speed Sensor” in this
section.Important: Wheel speed sensor intermittent malfunc-
tions may be difficult to locate. Take care not to disturb
any electrical connections before performing an indi-
cated step of this table. That will ensure that an intermit-
tent connection will not be corrected before the source
of the malfunction is found.
DTC 0356 – Left Front Wheel Speed Sensor Circuit Intermittent Shorted
 Step Action Value(s) Yes No
 
 
 
 
 
 
 
1
 
 
 
 
 
 
 
1. Turn the ignition switch to OFF.
2. Disconnect the EBCM harness connector from
the EBCM.
3. Use a digital voltmeter (DVM) to measure the
resistance between terminals 14 and 25 of
connector on the EBCM harness.
Is the resistance within the specified value? 
 
 
 
 
 
 
1.0 k
to
1.5 k

 
 
 
 
 
 
 
Go to Step 4
 
 
 
 
 
 
 
Go to Step 2
 
 
 
 
 
2
 
 
 
 
 
1. Disconnect the harness from the left front wheel
speed sensor.
2. Use a DVM to measure the resistance between
terminals 1 and 2 of the left front wheel speed
sensor connector.
Is the resistance within the specified value? 
 
 
 
 1.0 k
to
1.5 k

 
 
 
 
 Go to Step 4
 
 
 
 
 Go to Step 3
 
 3
 
 Replace the wheel speed sensor.
Is the repair complete?
 
 –
 
 System OK
 
 –
 
 
 4
 
 
 
Use a DVM to measure the resistance between
ground and terminal 14 of the EBCM connector.
Does the DVM show the specified value? 
 
 

 
 
 Go to Step 6
 
 
 Go to Step 5
 
 5
 
 
Repair the short to ground in circuit DK BLU.
Is the repair complete? 
 –
 
 System OK
 
 –
 
 6
 
 
Use a DVM to measure the resistance between
ground and terminal 25 of the EBCM connector.
Does the DVM show the specified value? 
 


 
 
Go to Step 8
 
 
Go to Step 7 
 7
 
 Repair the short to ground in circuit YEL.
Is the repair complete?
 
 –
 
 System OK
 
 –
 
 
 
 
8
 
 
 
 
1. Turn the ignition switch to ON.
2. Use a DVM to measure the voltage between
ground and terminal 14 of the EBCM connector.
Is the voltage within the specified value? 
 
 
 0 v
 
 
 
 Go to Step 10
 
 
 
 Go to Step 9
 
 9 
 
Repair the short to voltage in circuit DK BLU.
Is the repair complete? 
 – 
 System OK
 
 –
 
 10
 
 
Use a DVM to measure the resistance between
ground and terminal 25 of the EBCM connector.
Does the voltage within the specified value? 
 0 v
 
 Go to Step 12
 
 Go to Step 11 
 11
 
 Repair the short to voltage in circuit YEL.
Is the repair complete? 
 –
 
 System OK
 
 –
 
 12
 
 Replace the EBCM.
Is the repair complete? 
 –
 
 System OK
 
 –

ANTILOCK BRAKE SYSTEM 4F–25
DAEWOO M-150 BL2
intrusion exists, replace the wheel speed sensor har-
ness. If replacing a wheel speed sensor harness, in-
spect the sensor terminals. If you find evidence of
corrosion or water intrusion, replace the wheel speed
sensor. Refer to “Front Wheel Speed Sensor” in this
section.Important: Wheel speed sensor intermittent malfunc-
tions may be difficult to locate. Take care not to disturb
any electrical connections before performing an indi-
cated step of this table. That will ensure that an intermit-
tent connection will not be corrected before the source
of the malfunction is found.
DTC 0404 – Right Front Wheel Speed Sensor Circuit Open or Shorted
 Step Action Value(s) Yes No
 
 
 
 
 
 
 
1
 
 
 
 
 
 
 
1. Turn the ignition switch to OFF.
2. Disconnect the EBCM harness connector from
the EBCM.
3. Use a digital voltmeter (DVM) to measure the
resistance between terminals 12 and 13 of
connector on the EBCM harness.
Is the resistance within the specified value? 
 
 
 
 
 
 
1.0 k
to
1.5 k

 
 
 
 
 
 
 
Go to Step 4
 
 
 
 
 
 
 
Go to Step 2
 
 
 
 
 
2
 
 
 
 
 
1. Disconnect the harness from the right front wheel
speed sensor.
2. Use a DVM to measure the resistance between
terminals 1 and 2 of the right front wheel speed
sensor connector.
Is the resistance within the specified value? 
 
 
 
 1.0 k
to
1.5 k

 
 
 
 
 Go to Step 4
 
 
 
 
 Go to Step 3
 
 3
 
 Replace the wheel speed sensor.
Is the repair complete?
 
 –
 
 System OK
 
 –
 
 
 
 
4
 
 
 
 
Use a DVM to measure the resistance between ter-
minal 12 of the EBCM harness connector, and termi-
nal 1 of the right front wheel speed sensor harness
connector.
Is the resistance within the specified value? 
 
 
 
less than 1

 
 
 
 
Go to Step 6
 
 
 
 
Go to Step 5 
 
 
 
 
5
 
 
 
 
 
1. Repair the high resistance in circuit DK GRN/
BLK.
2. If the wheel speed sensor harness is damaged,
replace it.
Is the repair complete?
 
 
 
 
 
–
 
 
 
 
 System OK
 
 
 
 
 
–
 
 
 
 
6
 
 
 
 
Use a DVM to measure the resistance between ter-
minal 13 of the EBCM harness connector, and termi-
nal 2 of the right front wheel speed sensor harness
connector.
Is the resistance within the specified value? 
 
 
 less than 1

 
 
 
 Go to Step 8
 
 
 
 Go to Step 7
 
 
 
 
7
 
 
 
 
1. Repair the high resistance in circuit BRN/
DK GRN.
2. If the wheel speed sensor harness is damaged,
replace it.
Is the repair complete? 
 
 
 
–
 
 
 
 System OK
 
 
 
 
–
 
 
 
8
 
 
 
Use a DVM to measure the resistance between
ground and terminal 12 of the EBCM connector.
Does the DVM show the specified value? 
 
 

 
 
 Go to Step 10
 
 
 Go to Step 9
 
 9 
 
Repair the short to ground in circuit DK GRN/BLK.
Is the repair complete? 
 – 
 System OK
 
 –

4F–26 ANTILOCK BRAKE SYSTEM
DAEWOO M-150 BL2
DTC 0404 – Right Front Wheel Speed Sensor Circuit Open or Shorted (Cont’d)
 Step Action Value(s) Yes No
 
 10
 
 
Use a DVM to measure the resistance between
ground and terminal 13 of the EBCM connector.
Does the DVM show the specified value? 
 


 
 
Go to Step 12
 
 
Go to Step 11 
 11
 
 Repair the short to ground in circuit BRN/DK GRN.
Is the repair complete?
 
 –
 
 System OK
 
 –
 
 
 
 
 
12
 
 
 
 
 
1. Reconnect all of the connectors.
2. Turn the ignition to ON.
3. Use a DVM to measure the voltage between
ground and terminal 12 of EBCM connector.
Is the voltage within the specified value? 
 
 
 
 0 v
 
 
 
 
 Go to Step 14
 
 
 
 
 Go to Step 13
 
 13 
 
Repair the short to voltage in circuit DK GRN/BLK.
Is the repair complete? 
 – 
 System OK
 
 –
 
 14
 
 
Use a DVM to measure the voltage between ground
and terminal 13 of EBCM connector.
Is the voltage within the specified value? 
 0 v
 
 Go to Step 16
 
 Go to Step 15 
 15
 
 Repair the short to voltage in circuit BRN/DK GRN.
Is the repair complete? 
 –
 
 System OK
 
 –
 
 16
 
 
Replace the EBCM.
Is the repair complete? 
 –
 
 System OK
 
 –