Daewoo Nubira User Manual page 563

1F – 360IENGINE CONTROLS
Step
10
1. Check the fuel injector driver circuit.
2. Disconnect all of the fuel injector harness con-
nectors at the fuel injectors.
3. Connect an injector test light between the har-
ness terminals of each fuel injector connector.
4. Note the test light while cranking the engine.
Does the test light blink at all connectors?
11 Check the fuel injector driver wiring harness, the
connectors, and the connector terminals for the
proper connections.
Is the problem found?
12 Repair the wiring harness, the connector, or the con-
nector terminal as needed.
Is the repair complete?
13 Measure the resistance of each fuel injector at 68³F
(20³C). The resistance will increase slightly at high-
er temperatures.
Is the fuel injector resistance within the value speci-
fied?
14 Replace any fuel injector with a resistance that is out
of specifications.
Is the repair complete?
15 Perform an injector balance test.
Is the problem found?
16 Replace any restricted or leaking fuel injectors as
needed.
Is the repair complete?
17
1. Check for the proper ignition voltage output for
each cylinder with a spark tester.
2. Inspect the spark plugs for cracks, wear, im-
proper gap, burned electrodes, or heavy de-
posits.
3. Inspect the ignition wires for short conditions.
4. Inspect all of the ignition grounds for loose con-
nections.
5. Inspect the powertrain control module
(PCM)/engine control module (ECM) for the
proper operation.
Is the problem found?
18 Correct or replace any faulty ignition components.
Is the repair complete?
19 Does the engine misfire or cut out under load or at
idle?
20 Does the engine start, but then immediately stall?
21
1. Remove the Crankshaft Position (CKP) sensor.
2. Inspect for faulty connections and repair as
needed.
Is the problem found?
22 Repair the faulty connections as needed.
Is the repair complete?
Action Value(s) Yes
Go toStep 13
Go toStep 12
System OK
11.6–12.4 Ω
Go toStep 15
System OK
Go toStep 16
System OK
Go toStep 18
System OK
Go to"Ignition
System Check"
Go toStep 21
Go toStep 22
System OK
No
Go toStep 11
Go toStep 30
Go toStep 14
Go toStep 17
Go toStep 19
Go toStep 20
Go toStep 23
Go toStep 25
DAEWOO V–121 BL4