Daewoo Nubira Owner's Manual page 156

1F – 32IENGINE CONTROLS
Step
1 Perform an On–Board Diagnostic (OBD II) System
Check.
Is the check performed ?
2 Install the scan tool.
Is there a number 1 below any of the numbered posi-
tions in the OUTPUT DRIVERS?
3 Check for an open or shorted circuit in any corre-
sponding position (circuit) that contained a number
1 and repair as necessary.
Is a repair necessary?
4 Command the output being checked with a scan tool
while watching the corresponding position for each
circuit.
Do any of the positions change to a 1?
5 Command the output being checked with a scan tool
while watching the corresponding position for each
circuit.
Does the component or function operate when com-
manded?
6 Repair the short to voltage in the corresponding cir-
cuit for position (circuit) that displayed a 1.
Is the repair complete?
7 Disconnect the electrical connector to the compo-
nent connected to the faulty circuit.
Is a 1 still displayed in the corresponding OUTPUT
DRIVER position?
8 Replace the powertrain control module (PCM)/en-
gine control module (ECM)
Is the repair complete?
9 Operate the vehicle within the conditions under
which the original symptom was noted.
Does the system now operate properly?
PCM/ECM Output Diagnosis
Action Value(s) Yes
Go to Step 2
Go to Step 3
Go to Step 10
Go to Step 7
Go to Step 10
Go to Step 10
Go to Step 9
Go to Step 10
System OK
No
Go to "On–
Board Diagnos-
tic System
Check"
Go to Step 4
Go to Step 8
Go to Step 5
Go to the ap-
propriate com-
ponent repair
Go to the ap-
propriate com-
ponent repair
Go to Step 2
DAEWOO V–121 BL4