P1440

DTC P1440 Evaporative Emission (EVAP) Control System (Small Leak) (Positive Pressure)







On Board Diagnosis Logic

NOTE: If both DTC P1440 and P1448 are displayed, perform trouble diagnosis for "DTC P1448" first.

This diagnosis detects leaks in the EVAP purge line using of vapor pressure in the fuel tank.
The EVAP canister vent control valve is closed to shut the EVAP purge line. The vacuum cut valve bypass valve will then be opened to clear the line between the fuel tank and the EVAP canister purge volume control solenoid valve. The EVAP control system pressure sensor can now monitor the pressure inside the fuel tank.
If pressure increases, the ECM will check for leaks in the line between the vacuum cut valve and EVAP canister purge volume control solenoid valve.

CAUTION:
- Use only a genuine fuel filler cap as a replacement. If an incorrect fuel filler cap is used, the MIL may come on.
- If the fuel filler cap is not tightened properly, the MIL may come on.
- Use only a genuine rubber tube as a replacement.





DTC Confirmation Procedure

NOTE:
- If both DTC P1440 and PI448 are displayed, perform trouble diagnosis for "DTC P1448" first.
- If "DTC Confirmation Procedure" has been previously conducted, always turn ignition switch "OFF" and wait at least 5 seconds before conducting the next test.

With CONSULT

CAUTION:
- Never use compressed air or high pressure pump. Otherwise, EVAP system may be damaged.
- Do not exceed 4.12 kPa (0.042 kg/sq. cm, 0.6 psi) of pressure in EVAP system.

NOTE:
- Always remove EVAP service port adapter from EVAP service port when applying air up to 0.69 to 1.38 kPa (5.14 to 10.34 mmHg, 0.202 to 0.407 inHg).
- During the test, clamp the EVAP hose tightly as shown at left.







1. Turn ignition switch "ON".
2. Select "EVAP SML LEAK P1440" of "EVAPORATIVE SYSTEM" in "DTC WORK SUPPORT" mode with CONSULT Follow the instruction displayed.
3. Make sure that "OK" is displayed.
If "NG" is displayed, refer to "Diagnostic Procedure".

With GST

NOTE:
- Be sure to read the explanation of "Driving Pattern" before driving vehicle.
- It is better that fuel level is low.

1. Start engine.
2. Drive vehicle according to "Driving Pattern".
3. Stop vehicle.
4. Select "MODE 1" with GST.
- If SRT of EVAP system is not set yet, go to the following step.
- If SRT of EVAP system is set, the result will be OK.
5. Turn ignition switch "OFF" and wait at least 5 seconds.
6. Start engine.
If is not necessary to cool engine down before driving.
7. Drive vehicle again according to the "Driving Pattern".
8. Stop vehicle.
9. Select "MODE 3" with GST.
- If P0440 is displayed on the screen, go to "Diagnostic Procedure".
- If P1440 is displayed on the screen, go to "Diagnostic Procedure" for "DTC P1440".
- If P1447 is displayed on the screen, go to "Diagnostic Procedure" for "DTC P1447".
- If P0440, P1440 and P1447 are not displayed on the screen, go to the following step.
10. Select "MODE 1" with GST.
- If SRT of EVAP system is set, the result will be OK.
- If SRT of EVAP system is not set, go to step 6.

No Tools

NOTE:
- Be sure to read the explanation of "Driving Pattern" before driving vehicle.
- It is better that the fuel level is low.

1. Start engine.
2. Drive vehicle according to "Driving Pattern".
3. Stop vehicle.
4. Turn ignition switch "OFF" and wait at least 5 seconds.
5. Perform the step 1 to 4 again.
6. Turn ignition switch "ON" and perform "Diagnostic Test Mode II (Self-diagnostic results)" with ECM.

Steps 1 - 2:

Steps 3 - 4:

Steps 5 - 8:

Steps 9 - 15:

Steps 16 - 21:

Diagnostic Procedure