Daewoo NUBIRA User Manual

ENGINE CONTROLS 1F – 365
DAEWOO V–121 BL4
Step NoYesValue(s)Action
14
1. Check the cylinder compression and valve tim-
ing.
2. Inspect the camshaft for excessive wear.
Is the problem found?
Go toStep 15 Go toStep 16
15 Repair or replace any engine components as need-
ed.
Is the repair complete?
System OK
16
1. Check the powertrain control module
(PCM)/engine control module (ECM) grounds
for being clean, tight, and in their proper loca-
tion.
2. Check the Exhaust Gas Recirculation (EGR)
valve for being open or partially open all the
time.
3. Check the Torque Converter Clutch (TCC) op-
eration.
4. Check the A/C system operation.
5. Check the generator output.
6. Repair the generator if the output is not within
the specified range.
Are all checks and repairs complete?
12–16 v System OK
DETONATION/SPARK KNOCK
Step Action Value(s) Yes No
1 Were the Important Preliminary Checks performed? Go toStep 2 Go to”Impor-
tant Preliminary
Checks”
2
1. Fill the fuel tank with a known good grade of
gasoline that has the octane rating of the value
specified.
2. Reevaluate the vehicle’s performance.
Does the detonation problem still exist?
87–89 octane Go toStep 3 System OK
3
1. Inspect for low engine coolant.
2. Check for restricted airflow to the radiator or
restricted coolant flow.
3. Check for a faulty thermostat.
4. Check for an incorrect coolant solution.
Is the problem found?
Go toStep 4 Go toStep 5
4 Repair or replace any cooling system components
as needed.
Is the repair complete?
System OK
5
1. Check the voltage using the scan tool.
2. Replace the Engine Coolant Temperature
(ECT) sensor if the resistance is not within
specifications as listed in the Diagnostic Aids
for diagnostic trouble code (DTC) P0118.
Is the problem found?
Go toStep 6 Go toStep 7
6 Replace the ECT sensor or repair the circuit as
needed.
Is the repair complete?
System OK

Daewoo NUBIRA Specifications

General

Brand	Daewoo
Model	NUBIRA
Category	Automobile
Language	English