Daewoo NUBIRA, User Manual

Page: 546 / 685

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