DAEWOO NUBIRA 2004 Service Repair Manual

4F – 10IANTILOCK BRAKE SYSTEM
DAEWOO V–121 BL4
StepNo Yes Value(s) Action
3With the ignition still ON, observe the oil pressure
lamp.
Is the oil pressure lamp illuminated?–Go to Step 4Go to Step 19
41. Turn the ignition switch to LOCK.
2. Disconnect connector from the electronic brake
control module (EBCM).
3. Turn the ignition switch to ON.
Does the ABS indicator illuminate?–Go to Step 5Go to Step 8
5S Turn the ignition switch to LOCK.
S Examine terminals 19 and 20 at the EBCM
connector on both the ABS wiring harness and
on the EBCM.
Is there a poor connection at any of these terminals?–Go to Step 6Go to Step 7
6Repair the faulty terminals or replace the ABS unit
as required.
Is the repair complete?–System OK–
7Replace the ABS unit.
Is the repair complete?–System OK–
8S Turn the ignition switch to LOCK.
S Disconnect the wire from the negative battery
terminal.
S Measure the resistance between the negative
battery wire, which is attached to ground, and
the shorting bar in the EBCM connector.
Does the resistance match the specified value?0 WGo to Step 10Go to Step 9
9Repair the open or high resistance in the circuit from
EBCM connector, terminal 19 to ground G106.
Is the repair complete?–System OK–
101. Remove the I/P cluster.
2. Remove and check the ABS indicator bulb.
Is the bulb burned out?–Go to Step 11Go to Step 12
111. Replace the ABS indicator bulb.
2. Install the I/P cluster.
Is the repair complete?–System OK–
12Check the continuity at the I/P cluster connector ter-
minal A13.
Does the ohmmeter show the specified value?0 WGo to Step 14Go to Step 13
13Repair the contact at the I/P cluster connector termi-
nal A13.
Is the repair complete?–System OK–
14Check the wiring harnesses and the connectors in
circuit LT GRN/BLK from the I/P cluster terminal A13
to terminal 20 of the EBCM connector.
Does the ohmmeter show the specified value?Go to Step 15Go to Step 16
15Repair the open or high resistance found.
Is the repair complete?–System OK–
16Check for continuity between terminal 19 of the ABS
connector and ground G106.
Does the ground connection match the specified val-
ue?0 WGo to Step 17Go to Step 18

ANTILOCK BRAKE SYSTEM 4F – 11
DAEWOO V–121 BL4
StepNo Yes Value(s) Action
17Replace the ABS unit.
Is the repair complete?–System OK–
18Repair the continuity problem between terminal 19
of the EBCM connector and ground G106.
Is the repair complete?–System OK–
191. Turn the ignition switch to LOCK.
2. Check fuse F4 in the I/P fuse block.
Is this fuse blown?–Go to Step 20Go to Step 21
20Replace fuse F4.
Is the repair complete?–System OK–
21Check fuse EF5 in the engine fuse block.
Is this fuse blown?–Go to Step 22Go to Step 23
22Replace fuse EF5.
Is the repair complete?–System OK–
23Measure the voltage at terminal 2 of the ignition
switch connector by backprobing.
Does the voltage match the specified value?11–14 vGo to Step 25Go to Step 24
241. Check circuit RED between terminal 4 of C105
at the engine fuse block and terminal 2 of the
ignition switch for continuity.
2. Repair any open or high resistance found.
Is the repair complete?–System OK–
251. Turn the ignition switch to ON.
2. Backprobe terminal 4 (PNK) of the ignition
switch connector.
Does the voltage match the specified value?11–14 vGo to Step 27Go to Step 26
26Replace the ignition switch.
Is the repair complete?–System OK–
271. Turn the ignition switch to LOCK.
2. Check circuit PNK from terminal 4 of the igni-
tion switch to fuse F4 in the I/P fuse block.
Does the ohmmeter show the specified value?Go to Step 28Go to Step 29
28Repair the open or the high resistance.
Is the repair complete?–System OK–
291. Remove the instrument cluster.
2. Check circuit PNK from fuse F4 to terminal
A19 of the I/P cluster connector B.
3. Repair any open or high resistance found in a
wiring harness, splice pack, or connector.
Is the repair complete?–System OK–

4F – 12IANTILOCK BRAKE SYSTEM
DAEWOO V–121 BL4
J3B14F04
60A Ef230A Ef5
2
42
C107 C105
2
C110
G106
A19
A13 A1 A14
C110 C202
C202WHT LT GRN
DK
GRN LT GRN/
BLK
BLK
DK BLUDK BLU
PPL/WHT
PPL/WHT ABS
TCS Parking
Brake
Hot at all times
RED REDRED/WHT
Ignition
Switch
RED
RED
I/P Cluster
EBCM8
20
22 2216 41
1211
18 1621
1
C107
10A F410AF11
32 31
43
6 62 C201
C201 C201C201
C110 C202
Hot in Run and Start
30
4
1711
C202
15
B15
DLC
(Data Link
Connector)12
G106
BLK/WHTOil Feeding
Connector
”2” Ter.
BRNBRN BRN
BRN PNK PNK PNK
19J1
59B1
ONStart Lock
Acc
IG1
19
POWER SUPPLY TO CONTROL MODULE, NO DTCS
STORED
Circuit Description
Battery voltage is supplied to the electronic brake control
module (EBCM) through fuse F11 in the I/P fuse block, to
terminal 15 of the EBCM connector. The voltage is present
when the ignition switch is in the ON or START position.
Diagnosis
This test checks for battery output, proper grounding,
blown fuses, a faulty ignition switch, and problems in the
circuitry.
Cause(s)
S The battery is defective.
S There is a defective ground connection.
S A connector is damaged.
S A wire is broken or shorted.
S A fuse is blown.
S The ignition switch is malfunctioning.Fail Action
ABS action is disabled during the period of low voltage.
Test Description
The number(s) below refer to step(s) on the diagnostic
table.
1. This step determines whether there is voltage at
the battery and the high current source.
7. This step checks for voltage at the ignition 1
source.
11. This step begins the check for voltage at the EBCM
end of the ABS harness.
15. This step checks for a defective ground connection.
16. This is a check for a defective EBCM connector.
Diagnostic Aids
It is very important to perform a thorough inspection of the
wiring and the connectors. Failure to do so may result in
misdiagnosis, causing part replacement with a reappear-
ance of the malfunction.

ANTILOCK BRAKE SYSTEM 4F – 13
DAEWOO V–121 BL4
Power Supply to Control Module, No DTCs Stored
StepActionValue(s)YesNo
1Check the voltage at the battery.
Is the voltage within the specified value?11–14 vGo to Step 3Go to Step 2
2Charge or replace the battery as required.
Is the repair complete?–System OK–
3Check fuse EF2 in the engine fuse block.
Is the fuse blown?–Go to Step 4Go to Step 8
41. Replace fuse EF2.
2. Turn the ignition to ON.
Does the fuse blow again?–Go to Step 6Go to Step 5
5Check the ABS function.
Is the repair complete?–System OK–
61. Turn the ignition to OFF.
2. Remove fuse EF2.
3. Disconnect the ABS connector from the
EBCM.
4. Measure the resistance to ground at terminals
17 and 18.
Does the ohmmeter show the specified value?0 WGo to Step 7Go to Step 25
7Repair the short to ground in circuit RED between
terminal 1 of engine fuse block connector C107 and
the ABS harness EBCM connector.
Is the repair complete?–System OK–
8Check fuse EF5 in the engine fuse block.
Is the fuse blown?–Go to Step 9Go to Step 13
91. Replace fuse EF5.
2. Turn the ignition to ON.
Does the fuse blow again?–Go to Step 11Go to Step 10
10Check the ABS function.
Is the repair complete?–System OK–
111. Turn the ignition to OFF.
2. Remove fuse EF5.
3. Disconnect ABS connector from the EBCM.
4. Measure the resistance to ground at terminal
15.
Does the ohmmeter show the specified value?0 WGo to Step 12Go to Step 25
121. Examine circuit RED between terminal 4 of en-
gine fuse block connector C105 and terminal 2
of the ignition switch.
2. Examine circuit PNK from terminal 4 of the
ignition switch to fuse F11 in the I/P fuse block.
3. Examine circuit PNK from fuse F11 in the I/P
fuse block to terminal 15 of the ABS EBCM
connector.
4. Repair any short to ground found in the wiring
or the ignition switch.
Is the repair complete?–System OK–
13Check fuse F11 in the I/P fuse block.
Is the fuse blown?–Go to Step 14Go to Step 18

4F – 14IANTILOCK BRAKE SYSTEM
DAEWOO V–121 BL4
StepNo Yes Value(s) Action
141. Replace fuse F11.
2. Turn the ignition to ON.
Does the fuse blow again?–Go to Step 16Go to Step 15
15Check the ABS function.
Is the repair complete?–System OK–
161. Turn the ignition to OFF.
2. Remove fuse F11.
3. Disconnect ABS connector from the EBCM.
4. Measure the resistance to ground at terminal
15.
Does the ohmmeter show the specified value?0 WGo to Step 17Go to Step 25
17Repair the short to ground in circuit PNK fuse F11 of
the I/P fuse block and terminal 15 of the ABS har-
ness EBCM connector.
Is the repair complete?–System OK–
181. Disconnect the EBCM connector from the
EBCM.
2. Turn the ignition to ON.
3. Check for the presence of battery voltage be-
tween ground and terminal 17, and between
ground and terminal 18.
Is the voltage within the specified value?11–14 vGo to Step 20Go to Step 19
191. Turn the ignition switch to OFF.
2. Trace the RED wires between terminals 17 and
18 of the EBCM connector to terminal 1 of con-
nector C107 at the engine fuse block.
3. Repair the open in this circuit.
Is the repair complete?–System OK–
20Check the voltage between ground and terminal 15
of the EBCM connector.
Is the voltage within the specified value?11–14 vGo to Step 22Go to Step 21
211. Turn the ignition switch to OFF.
2. Trace circuit PNK between terminal 15 of the
ABS harness EBCM connector to fuse F11 in
the I/P fuse block.
3. Trace circuit PNK from fuse F11 of the I/P fuse
block to terminal 4 (IG1) of the ignition switch.
4. Trace circuit RED from terminal 2 (B1) of the
ignition switch to terminal 4 of connector C105
at the engine fuse block and to fuse EF5.
5. Repair the open in the wiring or possibly bad
connector terminal, defective ignition switch, or
blown fuse EF5.
Is the repair complete?–System OK–
221. Turn the ignition to OFF.
2. Check the resistance between ground and ter-
minals 19 and 16 of the EBCM connector.
Does the ohmmeter show the specified value?0 WGo to Step 23Go to Step 26
23Examine terminals 15, 19, 17, 18, and 16 of the
EBCM connector.
Is there a defective terminal?–Go to Step 24Go to Step 25

ANTILOCK BRAKE SYSTEM 4F – 15
DAEWOO V–121 BL4
StepNo Yes Value(s) Action
24Repair the defective terminal or replace the connec-
tor or wiring harness as required.
Is the repair complete?–System OK–
25Replace the ABS unit.
Is the repair complete?–System OK–
26Repair the defective ground connection.
Is the repair complete?–System OK–

4F – 16IANTILOCK BRAKE SYSTEM
DAEWOO V–121 BL4
J3B14F04
60A Ef230A Ef5
2
42
C107 C105
2
C110
G106
A19
A13 A1 A14
C110 C202
C202WHT LT GRN
DK
GRN LT GRN/
BLK
BLK
DK BLUDK BLU
PPL/WHT
PPL/WHT ABS
TCS Parking
Brake
Hot at all times
RED REDRED/WHT
Ignition
Switch
RED
RED
I/P Cluster
EBCM8
20
22 2216 41
1211
18 1621
1
C107
10A F410AF11
32 31
43
6 62 C201
C201 C201C201
C110 C202
Hot in Run and Start
30
4
1711
C202
15
B15
DLC
(Data Link
Connector)12
G106
BLK/WHTOil Feeding
Connector
”2” Ter.
BRNBRN BRN
BRN PNK PNK PNK
19J1
59B1
ONStart Lock
Acc
IG1
19
ABS INDICATOR LAMP ILLUMINATED CONTINUOUSLY,
NO DTCS STORED
Circuit Description
Battery voltage is supplied to the ABS warning lamp with
the ignition switch in the ON or START position. The warn-
ing lamp should be activated only by the ABS control mod-
ule internally supplying ground to terminal 20.
Diagnosis
This procedure checks for a short to ground in the wiring
or a defective electronic brake control module (EBCM).Cause(s)
S There is a short to ground in the circuit between the
cluster terminal A13 and the EBCM terminal 20.
S The EBCM is faulty.
Test Description
The number(s) below refer to step(s) on the diagnostic
table.
3. This step determines whether the EBCM is faulty.
5. This begins a search for a short to ground in the
circuit between the ABS indicator lamp and the
EBCM.

ANTILOCK BRAKE SYSTEM 4F – 17
DAEWOO V–121 BL4
ABS Indicator Lamp Illuminated Continuously, No DTCs Stored
StepActionValue(s)YesNo
1Check the EBCM connector.
Is it connected properly?–Go to Step 3Go to Step 2
2Connect the EBCM connector.
Is the repair complete?–System OK–
3S Disconnect the EBCM connector.
S Turn the ignition switch to ON.
S Use an insulated tool to push the shorting bar
in the connector away from terminal 20.
Does the ABS indicator lamp go out?–Go to Step 4Go to Step 5
4Replace the ABS unit.
Is the repair complete?–System OK–
5S Turn the ignition switch to OFF.
S Connect the EBCM connector.
S Disconnect connector C110.
S Turn the ignition switch to ON.
Does the ABS indicator lamp illuminate?–Go to Step 7Go to Step 6
6Repair the short to ground in circuit LT GRN between
connector C110 and the EBCM connector.
Is the repair complete?–System OK–
7Repair the short to ground in circuit LT GRN between
I/P cluster connector A13 and connector C110.
Is the repair complete?–System OK–

4F – 18IANTILOCK BRAKE SYSTEM
DAEWOO V–121 BL4
J3B14F04
60A Ef230A Ef5
2
42
C107 C105
2
C110
G106
A19
A13 A1 A14
C110 C202
C202WHT LT GRN
DK
GRN LT GRN/
BLK
BLK
DK BLUDK BLU
PPL/WHT
PPL/WHT ABS
TCS Parking
Brake
Hot at all times
RED REDRED/WHT
Ignition
Switch
RED
RED
I/P Cluster
EBCM8
20
22 2216 41
1211
18 1621
1
C107
10A F410AF11
32 31
43
6 62 C201
C201 C201C201
C110 C202
Hot in Run and Start
30
4
1711
C202
15
B15
DLC
(Data Link
Connector)12
G106
BLK/WHTOil Feeding
Connector
”2” Ter.
BRNBRN BRN
BRN PNK PNK PNK
19J1
59B1
ONStart Lock
Acc
IG1
19
ELECTRONIC BRAKE–FORCE DISTRIBUTION (EBD)
SYSTEM INDICATOR LAMP INOPERATIVE
Circuit Description
Battery voltage is supplied to the EBD warning lamp with
the ignition switch in the ON or START position. The warn-
ing lamp can be activated only by the ABS control module
internally supplying ground to terminal 21.
Diagnosis
This procedure checks for a problem in the wiring, a faulty
ground, a voltage supply problem, a burned out indicator
lamp, or a contact problem in a connector.
Cause(s)
S A fuse has blown.
S The indicator lamp has burned out.
S There is a corroded or broken connector terminal.S There is a faulty ground connection.
S There is a broken wire in a wiring harness.
S The EBCM is faulty.
Test Description
The number(s) below refer to step(s) on the diagnostic
table.
1. This test checks for any DTCs that may cause the
EBD indicator lamp to be inoperative.
2. This test verifies an inoperative lamp condition.
3. This test checks for voltage on the lamp circuit.
4. This begins a series of tests of the circuit from the
indicator lamp to the EBCM and ground.
19. This begins a series of tests of the voltage supply
circuits that power the indicator lamp.

ANTILOCK BRAKE SYSTEM 4F – 19
DAEWOO V–121 BL4
EBD System Indicator Lamp Inoperative
StepActionValue(s)YesNo
1Install the scan tool and check for any DTCs.
Is any DTC set?–Go to the chart
for the DTCGo to Step 2
21. Turn the ignition switch to LOCK.
2. Disconnect the scan tool.
3. Release the parking brake fully.
4. Push the brake pedal.
5. Turn the ignition switch to ON.
6. Observe the EBD indicator lamp.
Does the lamp illuminate for about 4 seconds, then
turn off?–Go to ”Intermit-
tents and Poor
Connections”Go to Step 3
3With the ignition still ON, observe the oil pressure
lamp.
Is the oil pressure lamp illuminated?–Go to Step 4Go to Step 19
41. Turn the ignition switch to LOCK.
2. Disconnect connector from the EBCM.
3. Connect a jumper from terminal 21 to the
grounding bar in the connector.
4. Turn the ignition switch to ON.
Does the EBD indicator illuminate?–Go to Step 5Go to Step 8
5S Turn the ignition switch to LOCK.
S Examine terminals 19 and 21 at the EBCM
connector on both the ABS wiring harness and
on the EBCM.
Is there a poor connection at any of these terminals?–Go to Step 6Go to Step 7
6Repair the faulty terminals or replace the ABS unit
as required.
Is the repair complete?–System OK–
7Replace the ABS unit.
Is the repair complete?–System OK–
8S Turn the ignition switch to LOCK.
S Disconnect the wire from the negative battery
terminal.
S Measure the resistance between the negative
battery wire, which is attached to ground, and
the shorting bar in the EBCM connector.
Does the resistance match the specified value?0 WGo to Step 10Go to Step 9
9Repair the open or high resistance in the circuit from
EBCM connector, terminal 19 to ground G106.
Is the repair complete?–System OK–
101. Remove the I/P cluster.
2. Remove and check the EBD indicator bulb.
Is the bulb burned out?–Go to Step 11Go to Step 12
111. Replace the EBD indicator bulb.
2. Install the I/P cluster.
Is the repair complete?–System OK–
12Check the continuity at the I/P cluster connector ter-
minal A1.
Does the ohmmeter show the specified value?0 WGo to Step 14Go to Step 13