Hard Start - Daewoo CIELO EURO III Manual

Definition: The engine cranks OK, but does not start for
a long time. The engine eventually runs or may start and
immediately die.
Step
Were the Important Preliminary Checks performed?
1
1. Connect the scan tool to the data link connector
(DLC).
2. Check the Engine Coolant Temperature (ECT)
sensor and the Intake Air Temperature (IAT)
sensor using the scan tool.
2
3. Compare the ECT and the IAT with the ambient
temperature when the engine is cold.
Do the ECT and the IAT readings differ from the am-
bient temperature by more than the value specified?
1. Measure the resistance of the ECT and the IAT
sensor.
2. Compare the resistance value to specifications
using the Temperature Vs. Resistance table for
3
DTCs P1111 and P1114.
3. If the resistance is not the same, replace the
faulty sensor.
Is the repair complete?
1. Check for a sticking throttle shaft or a binding
linkage that may cause a high Throttle Position
(TP) sensor voltage. Repair or replace as
needed.
4
2. Check the TP sensor voltage reading with the
throttle closed.
Does the voltage measure within the value speci-
fied?
1. Check the Manifold Absolute Pressure (MAP)
sensor response and accuracy.
5
2. Replace the MAP sensor as needed.
Is the repair complete?
Check the fuel pump operation.
6
Does the fuel pump operate for the specified time
when the ignition switch is turned ON?
Check the fuel system pressure.
7
Is the fuel pressure within the specifications?
Check for water contamination in the fuel.
8
Is the fuel contaminated?
Replace the contaminated fuel.
9
Is the repair complete?
DAEWOO T-154 BL2,3

HARD START

Action
ENGINE CONTROLS 1F – 365
Important: Ensure that the driver is using the correct
starting procedure. Before diagnosing, check service
bulletins for updates.
Value(s)
–
Go to Step 2
3_C (37_F) Go to Step 3
–
System OK
0.4-0.8 v Go to Step 5
–
System OK
2 sec Go to Step 7
284-325 kPa
Go to Step 8
(41-47 psi)
– Go to Step 9
– System OK
Yes No
Go to
''Important
Preliminary
Checks"
Go to Step 4
–
Go to Step 26
Go to Step 6
Go to "Fuel
Pump Relay
Circuit Check"
Go to Step 29
Go to Step 10
–