Up to 08/2009

2GR-FXE ENGINE CONTROL: SFI SYSTEM: P043E,P043F,P2401,P2402,P2419: Evaporative Emission System Reference Orifice Clog Up


DTC SUMMARY





HINT
The reference orifice is located inside the canister pump module.

DESCRIPTION

The circuit description can be found in the EVAP (evaporative emission) System EVAP System.

INSPECTION PROCEDURE

Refer to the EVAP System EVAP System.

MONITOR DESCRIPTION

In sequence B and E, the leak detection pump creates negative pressure (vacuum) through the reference orifice. The EVAP system pressure is then measured by the ECM, using the canister pressure sensor, to determine the reference pressure. If the pressure is one of the following conditions, the ECM illuminates the MIL and sets the DTC (2 trip detection logic).

- Canister pressure is lower than the malfunction criterion (ex. 724 mmHg).

- Canister pressure is higher than the malfunction criterion (ex. 752 mmHg).

- Canister pressure is not saturated within 60 seconds.

- Canister pressure difference between sequence B and E is large.





MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





Key-off monitor sequence 1 to 15

1. Atmospheric pressure measurement





2. First reference pressure measurement





3. Vent valve stuck closed check





4. Vacuum introduction for canister





5. Purge VSV stuck closed check





6. Second reference pressure measurement





7. Canister leak check





8. Fuel tank closed valve (TCV) stuck closed check





9. Vacuum introduction for fuel tank





10. TCV stuck closed check





11. Fuel tank pressure sensor stuck check





12 Third reference pressure measurement





13. Fuel tank leak check





14. Fuel tank pressure sensor stuck check





15. Atmospheric pressure measurement





TYPICAL MALFUNCTION THRESHOLDS





CONFIRMATION DRIVING PATTERN





NOTICE:
- The Evaporative System Check (Automatic Mode) consists of 8 steps performed automatically by the Techstream. It takes a maximum of approximately 18 minutes.
- Do not perform the Evaporative System Check when the fuel tank is more than 90% full because the cut-off valve may be closed, making the fuel tank leak check unavailable.
- Do not run the engine during this operation.
- When the temperature of the fuel is 35°C (95°F) or more, a large amount of vapor forms and any check results become inaccurate. When performing the Evaporative System Check, keep the fuel temperature below 35°C (95°F).
- Connect the Techstream to the DLC3.

- Turn the power switch on (IG) and turn the Techstream on.

- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure) DTC Check / Clear.

- Turn the power switch off.

- Turn the power switch on (IG) and turn the Techstream on.

- Enter the following menus: Powertrain / Engine and ECT / Utility / Evaporative System Check / Automatic Mode [A].

- After the Evaporative System Check is completed, check for All Readiness by entering the following menus: Powertrain / Engine and ECT / Utility / All readiness.

- Input the DTC: P043E, P043F, P2401, P2402 or P2419.

- Check the DTC judgment result [B].





HINT
If the judgment result shows ABNORMAL, the system has a malfunction.

- If the test result is UNKNOWN, enter the following menus: Powertrain / Engine and ECT / Trouble Codes / Pending.

- Read Pending DTCs.

HINT
If a pending DTC is output, the system is malfunctioning.

- If the test result is INCOMPLETE or UNKNOWN and no pending DTC is output, perform a universal trip and check for permanent DTCs DTC Check / Clear.

HINT
- If a permanent DTC is output, the system is malfunctioning.
- If no permanent DTC is output, the system is normal.
MONITOR RESULT

Refer to Checking Monitor Status Mode 6 Data.