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On Board Diagnosis Logic
NGEC0244
NOTE:
If DTC P0440 OR P1440 is displayed with DTC P1448, perform trouble diagnosis for DTC P1448 first.
(See EC-519.)
This diagnosis detects leaks in the EVAP purge line using engine intake manifold vacuum.
If pressure does not increase, the ECM will check for leaks in the line between the fuel tank and EVAP can-
ister purge volume control solenoid valve under the following “Vacuum test” conditions.
The vacuum cut valve bypass valve is opened to clear the line between the fuel tank and the EVAP canister
purge volume control solenoid valve.The EVAP canister vent control valve will then be closed to shut the EVAP
purge line off. The EVAP canister purge volume control solenoid valve is opened to depressurize the EVAP
purge line using intake manifold vacuum. After this occurs, the EVAP canister purge volume control solenoid
valve will be closed.
SEF865Z
DTC P0440 EVAP CONTROL SYSTEM (SMALL LEAK)
(NEGATIVE PRESSURE)
KA24DE
On Board Diagnosis Logic
EC-352
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