ENGINE CONTROLS 1F–211
DAEWOO M-150 BL2
D The EVAP system in unable to achieve or maintain
vacuum during the diagnostic test. The amount of
decay will vary within the fuel level.
Action Taken When The DTCs Sets
D The Malfunction Indicator Lamp (MIL) will illuminate.
D The ECM will record operating conditions at the time
the diagnostic fails. This information will be stored in
the Freeze Frame and Failure Records buffers.
D A history DTC is stored.
Conditions for Clearing the MIL/DTC
D The MIL will turn off after four consecutive ignition
cycles in which the diagnostic runs without a fault.
D A history DTC will clear after 40 consecutive warm-up
cycles without a fault.
D DTC(s) can be cleared by using the scan tool.
Diagnostic Aids
Although this DTC is considered a type. A diagnostic, it
acts like a type B diagnostic under certain conditions.
Whenever this diagnostic reports the system has
passed, or if the battery is disconnected, the diagnostic
must fail twice before setting a DTC. The initial failure is
not reported to the diagnostic executive or displayed on
a scan tool. A passing system always reports to the
diagnostic executive immediately.
Check for the following conditions :
D Missing or damaged fuel cap.
D Missing or damaged O-rings at fuel vapor and EVAP
purge line canister fittings.
D Cracked or punctured EVAP canister.
D Damaged source vacuum line, EVAP purge line,
EVAP vent hose or fuel tank vapor line.
D Poor connection at the ECM. Inspect the harness
connectors for the following conditions.
D Backed-out terminals.
D Improper mating.
D Broken locks.
D Improperly formed.
D Damaged terminals.
D Poor terminal-to-wire connection.
D Damaged harness. Inspect the wiring harness to the
EVAP vent solenoid, EVAP canister purge valve, and
the fuel tank pressure sensor for an intermittent open
or short circuit.
D Kinked, pinched or plugged vacuum source, EVAP
purge, or fuel tank vapor line. Verify that the lines are
not restricted.
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