Daewoo CIELO EURO III Manual page 239

(199 F). The ECM will turn the cooling fans off
when the coolant temperature is 90 C (194 F).
The ECM will turn the cooling fans on at high
speed when the coolant temperature is 97 C
(207 F). The ECM will change the cooling fans
from high speed to low speed when the coolant tem-
perature is 94 C (201 F).
The cooling fan circuit can be checked quickly by dis-
connecting the ECM
grounding the connector terminal K28. This should
create low speed cooling fan operation with the igni-
tion ON. By grounding the ECM connector ter-
Step
Perform an On-Board Diagnostic (EOBD) System
Check.
1
Is the check completed?
1. Check the I/P fuse block fuse F11.
2 2. Replace the fuse as needed.
Is the fuse OK?
1. Check the engine fuse block fuse F14.
3 2. Replace the fuse as needed.
Is the fuse OK?
1. Turn the ignition OFF.
2. Connect the scan tool to the Data Link Connector
(DLC).
3. Start the engine.
4
4. The cooling fan should run at low speed when the
coolant temperature reaches 93 C (199 F).
Does the cooling fan run at low speed?
1. Turn the ignition OFF.
2. Connect a scan tool to the DLC.
3. Start the engine.
5
4. The cooling fan should run at high speed when
the coolant temperature reaches 97 C (207 F).
Does the cooling fan run at high speed?
1. Turn the ignition OFF.
2. Disconnect the
engine control module (ECM) connector.
6 3. Connect a fused jumper between the ECM
connector terminal k28 and ground.
4. Turn the ignition ON.
Does the cooling fan run at low speed?
1. Turn the ignition OFF.
2. Connect a fused jumper between the ECM
connector terminal K28 and ground.
3. Disconnect the cooling fan connector.
7
4. Connect a test light between the cooling fan
connector terminal B and ground.
5. Turn the ignition ON.
Is the test light on?
DAEWOO T-154 BL2,3
connector and
Engine Cooling Fan Circuit Check – Without A/C
Action
ENGINE CONTROLS 1F – 71
minals C13 and C12 and turning the ignition ON, high
speed cooling fan operation should be achieved.
Test Description
The number(s) below refer to step(s) on the diagnostic
table.
4. This step, along with step 5, checks for the ability of
the ECM to operate the cooling fans.
22. By directly grounding the ECM connector ter-
minals K28 and K12, the cooling fan should run at
high speed.
Value(s)
–
Go to Step 2
–
Go to Step 3
–
Go to Step 4
–
Go to Step 5
–
System OK
–
Go to Step 21
–
Go to Step 8
Yes No
Go to
"On-Board
Diagnostic
System Check"
Go to
"Diagnostic
Aids"
Go to
"Diagnostic
Aids"
Go to Step 6
Go to Step 22
Go to Step 7
Go to Step 9