P0440

On Board Diagnosis Logic

NOTE: If DTC P0440 is displayed with P1448, perform trouble diagnosis for DTC P1448 first.

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 canister 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.

CAUTION:
- Use only a genuine NISSAN 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 NISSAN rubber tube as a replacement.




DTC Confirmation Procedure

NOTE:
- If DTC P0440 is displayed with P1448, 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.

TESTING CONDITION:
- Perform "DTC WORK SUPPORT" when the fuel level is less than 3/4 full and vehicle is placed on flat level surface.
- Always perform test at a temperature of 0 to 30°C (32 to 86°F).
- It is better that the fuel level is low.

With CONSULT
1. Turn ignition switch "ON".
2. Turn ignition switch "OFF" and wait at least 5 seconds.
3. Turn ignition switch "ON" and select "DATA MONITOR" mode with CONSULT.
4. Make sure that the following conditions are met.
COOLAN TEMP/S: 0 - 70°C (32 - 158°F)
INT/A TEMP SE: 0 - 60°C (32 - 140°F)







5. Select "EVAP SML LEAK P0440" of "EVAPORATIVE SYSTEM" in "DTC WORK SUPPORT" mode with CONSULT Follow the instruction displayed.

NOTE:
- If the CONSULT screen shown at left is displayed, stop the engine and stabilize the vehicle temperature at 25°C (77°F) or cooler. After "TANK F/TMP SE" becomes less than 30°C (86°F), retest.
(Use a fan to reduce the stabilization time.)
- If the engine speed cannot be maintained within the range displayed on the CONSULT screen, go to "Basic Inspection".




6. Make sure that "OK" is displayed.
If "NG" is displayed, refer to "Diagnostic Procedure" below.

NOTE: Make sure that EVAP hoses are connected to EVAP canister purge volume control solenoid valve properly.

With GST

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. 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.
It 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" below.
- 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.

Without Scan Tool

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. Turn ignition switch "ON" and perform "Diagnostic lest Mode II (Self-diagnostic results)" with ECM.
6. If 1st trip DTC is detected, go to "Diagnostic Procedure" below.

Diagnostic Procedure

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