Daewoo CIELO EURO III Manual page 252

1F – 84 ENGINE CONTROLS
Step
Check the serial data circuit for a short to voltage
and repair as necessary.
6
Is a repair necessary?
With the test light connected to B+, probe the DLC
ground circuit terminals 4 and 5.
7
Does the test light illuminate for both circuits?
Repair the open or short to ground in the DLC bat-
tery feed circuit.
8
Is the repair complete?
Check the serial data circuit for an open or a poor
connection and repair as necessary.
9
Is a repair necessary?
Check the serial data circuit for short to ground and
repair as necessary.
10
Is a repair necessary?
1. Turn the ignition OFF.
2. Replace the engine control module (ECM).
11
Is the repair complete?
Repair the open or poor connection(s) in the DLC
ground circuit(s).
12
Is the repair complete?
Reinstall the scan tool.
13
Can the scan tool communicate with the ECM?
Install the scan tool on another vehicle with a Class
II serial data terminal and check for proper opera-
tion.
14
Does the scan tool work properly on a different ve-
hicle?
Check the DLC electrical terminals for proper ten-
sion or excessive resistance and repair as neces-
15
sary.
Is a repair necessary?
1. The scan tool is malfunctioning.
16 2. Refer to the scan tool's manual for repair.
Is the repair complete?
1. Using the scan tool, clear the Diagnostic Trouble
Codes (DTCs).
17
2. Attempt to start the engine.
Does the engine start and continue to run?
1. Allow the engine to idle until normal operation
temperature is reached.
18 2. Check if any DTCs are set.
Are any DTCs displayed that have not been diag-
nosed?
Data Link Connector Diagnosis (Cont'd)
Action Value Yes
–
Go to Step 17
–
Go to Step 15
–
Go to Step 17
–
Go to Step 17
–
Go to Step 17
–
Go to Step 17
–
Go to Step 17
– Go to Step 17
–
Go to Step 11
–
Go to Step 17
–
Go to Step 17
–
Go to Step 18
–
Go to applicable
DTC table
No
Go to Step 11
Go to Step 12
–
Go to Step 13
Go to Step 11
–
–
Go to Step 14
Go to Step 16
Go to Step 16
–
Go to Step 1
System OK
DAEWOO T-154 BL2,3