Daewoo Nubira. Manual - part 114

 

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Daewoo Nubira. Manual - part 114

 

 

1F – 38

I

ENGINE CONTROLS

DAEWOO V–121 BL4

Step

No

Yes

Value(s)

Action

11

1.  Turn the ignition OFF.
2.  Disconnect the Crankshaft Position (CKP) sen-

sor connector.

3.  Turn the ignition ON.
4.  Measure the voltage between the CKP connec-

tor terminals 1 and 3.

Does the voltage measure near the value specified?

1.08 volts

Go toStep 12

Go toStep 13

12

Measure the voltage between the CKP connector
terminals 2 and 3.
Does the voltage measure near the value specified?

1.08 volts

Go toStep 19

Go toStep 14

13

Measure the voltage between the CKP connector
terminals 1 and ground.
Does the voltage measure near the value specified?

1.08 volts

Go toStep 15

Go toStep 16

14

Measure the voltage between the CKP connector
terminals 2 and ground.
Does the voltage measure near the value specified?

1.08 volts

Go toStep 15

Go toStep 17

15

Check for an open or short in the wire between the
CKP connector terminal 3 and ground.
Is the problem found?

Go toStep 18

Go toStep 33

16

Check for an open or short in the wire between the
CKP connector terminal 1 and the powertrain control
module (PCM)/engine control module (ECM) con-
nector terminal C6.
Is the problem found?

Go toStep 18

Go toStep 33

17

Check for an open or short in the wire between the
CKP connector terminal 2 and the PCM/ECM con-
nector terminal C5.
Is the problem found?

Go toStep 18

Go toStep 33

18

Repair the wiring as needed.
Is the repair complete?

Go toStep 2

19

1.  Disconnect the electronic ignition (EI) system

ignition coil connector to prevent the vehicle
from starting.

2.  Measure the voltage at the PCM/ECM connec-

tor terminal C6 by backprobing the PCM/ECM
connector.

Are the voltage readings near the values specified?

1.08 v with igni-

tion ON, 1.20 v

during cranking

Go toStep 20

Go toStep 21

20

Measure the voltage at the PCM/ECM connector
terminal C5 by backprobing the PCM/ECM connec-
tor.
Are the voltage readings near the values specified?

1.08 v with igni-

tion ON, 1.20 v

during cranking

Go toStep 22

Go toStep 21

21

Replace the CKP sensor.
Is the repair complete?

Go toStep 2

22

1.  Turn the ignition OFF.
2.  Disconnect the electrical connector at the EI

system ignition coil.

3.  Connect a test light between terminal D of the

EI system ignition coil connector and ground.

4.  Turn the ignition ON.

Is the test light on?

Go toStep 23

Go toStep 24

ENGINE CONTROLS  1F – 39

DAEWOO V–121 BL4

Step

No

Yes

Value(s)

Action

23

Connect a test light between terminal C of the EI sys-
tem ignition coil connector and battery positive.
Is the test light on?

Go toStep 27

Go toStep 25

24

Check for an open in the wiring between the battery
and the EI system ignition coil connector terminal D.
Is the problem found?

Go toStep 26

Go to”Ignition 1

Relay Circuit

Check”

25

Check for an open in the wire from the EI system
ignition coil to ground.
Is the problem found?

Go toStep 26

26

1.  Repair the wiring as needed.
2.  Connect the EI system ignition coil connector.
3.  Check for the presence of spark from all of the

ignition wires.

Is spark present from all of the ignition wires?

Go toStep 2

Go toStep 27

27

1.  Turn the ignition OFF.
2.  Disconnect the EI system ignition coil connec-

tor.

3.  While cranking the engine, measure the volt-

age at the EI system ignition coil connector
terminal B.

Does the voltage fluctuate within the values speci-
fied?

0.2–2.0 v

Go toStep 28

Go toStep 29

28

While cranking the engine, measure the voltage at
the EI system ignition coil connector terminal A.
Does the voltage fluctuatewithin the values speci-
fied?

0.2–2.0 v

Go toStep 32

Go toStep 30

29

Check for an open in the wire from the EI system
ignition coil connector terminal B to the PCM/ECM
connector terminal C4.
Is the problem found?

Go toStep 31

Go toStep 33

30

Check for an open in the wire from the EI system
ignition coil connector terminal A to the PCM/ECM
connector terminal D5.
Is the problem found?

Go toStep 31

Go toStep 33

31

1.  Repair the wiring as needed.
2.  Connect the EI system ignition coil connector.
3.  Check for the presence of spark from all of the

ignition wires.

Is spark present from all of the ignition wires?

Go toStep 2

Go toStep 32

32

Replace the EI system ignition coil.
Is the repair complete?

Go toStep 2

33

Replace the PCM/ECM.
Is the repair complete?

Go toStep 2

34

1.  Turn the ignition OFF.
2.  Connect a fuel pressure gauge.
3.  Crank the engine.

Is any fuel pressure present?

Go toStep 37

Go toStep 35

1F – 40

I

ENGINE CONTROLS

DAEWOO V–121 BL4

Step

No

Yes

Value(s)

Action

35

1.  Turn the ignition OFF.
2.  Disconnect the electrical connector at the fuel

pump.

3.  Connect a test light between the fuel pump

connector terminals 3 and 2.

4.  Turn the ignition ON.
5.  With the ignition ON, the test light should light

for the time specified.

Is the test light on?

2 sec

Go toStep 36

Go toStep 46

36

Replace the fuel pump.
Is the repair complete?

Go toStep 2

37

Is the fuel pressure within the value specified?

283–324 kPa

(41–47 psi)

Go toStep 41

Go toStep 38

38

1.  Check the fuel filter for a restriction.
2.  Inspect the fuel lines for kinks and restrictions.

Is the problem found?

Go toStep 39

Go toStep 40

39

1.  Replace the fuel filter and/or the fuel lines as

needed.

2.  Connect a fuel pressure gauge.
3.  Crank the engine.

Is the fuel pressure within the value specified?

283–324 kPa

(41–47 psi)

Go toStep 2

Go toStep 40

40

1.  Disconnect the vacuum line from the fuel pres-

sure regulator.

2.  Inspect the vacuum line for the presence of

fuel.

3.  Inspect the fuel pressure regulator vacuum port

for the presence of fuel.

Is any fuel present?

Go toStep 43

Go toStep 44

41

Check the fuel for contamination.
Is the fuel contaminated?

Go toStep 42

Go toStep 58

42

1.  Remove the contaminated fuel from the fuel

tank.

2.  Clean the fuel tank as needed.

Is the repair complete?

Go toStep 2

43

Replace the fuel pressure regulator.
Is the repair complete?

Go toStep 2

44

1.  Remove the fuel pump assembly from the fuel

tank.

2.  Inspect the fuel pump sender and the fuel cou-

pling hoses for a restriction.

3.  Inspect the in–tank fuel filter for a restriction.

Is the problem found?

Go toStep 45

Go toStep 36

45

Replace the fuel pump sender, the in–tank fuel filter,
and/or the fuel coupling hoses as needed.
Is the repair complete?

Go toStep 2

ENGINE CONTROLS  1F – 41

DAEWOO V–121 BL4

Step

No

Yes

Value(s)

Action

46

1.  Turn the ignition OFF.
2.  Disconnect the electrical connector at the fuel

pump.

3.  Connect a test light between the fuel pump

connector terminal 3 and a known good
ground.

4.  Turn the ignition ON.
5.  With the ignition ON, the test light should illumi-

nate for the time specified.

Is the test light on?

2 sec

Go toStep 47

Go toStep 48

47

Repair the open wire between the fuel pump connec-
tor terminal 2 and ground.
Is the repair complete?

Go toStep 2

48

1.  Turn the ignition OFF.
2.  Disconnect the fuel pump relay.
3.  Connect a test light between the fuel pump

relay connector terminal 85 and ground.

4.  Turn the ignition ON.

Is the test light on?

Go toStep 49

Go toStep 60

49

1.  Turn the ignition OFF.
2.  Connect a test light between the fuel pump

relay connector terminal 86 and terminal 85.

3.  Turn the ignition ON.
4.  With the ignition ON, the test light should light

for the time specified.

Is the test light on?

2 sec

Go toStep 50

Go toStep 52

50

1.  Turn the ignition OFF.
2.  Connect a test light between the fuel pump

relay connector terminal 30 and ground.

Is the test light on?

Go toStep 51

Go toStep 63

51

1.  Turn the ignition ON.
2.  Measure the voltage at the fuse EF19 connec-

tion.

Is the voltage within the specified value?

11–14 v

Go toStep 53

Go toStep 52

52

Replace the fuel pump relay.
Is the repair complete?

Go toStep 2

53

Measure the voltage at the fuse EF19 again.
Is the voltage within the specified value?

11–14 v

Go toStep 55

Go toStep 54

54

Replace the engine fuse block.
Is the repair complete?

Go toStep 2

55

1.  Disconnect the fuel cutoff switch connector.
2.  Measure the voltage at terminal 1 of the fuel

cutoff switch connector.

Is the voltage within the specified value?

11–14 v

Go toStep 57

Go toStep 56

56

Repair the open or short between the fuel cutoff
switch and fuse EF19.
Is the repair complete?

Go toStep 2

57

1.  Reconnect the fuel cutoff switch.
2.  Measure the voltage at terminal 3 of the fuel

cutoff switch connector.

Is the voltage within the specified value?

11–14 v

Go toStep 58

Go toStep 59

 

 

 

 

 

 

 

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