Part 1

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


DTC SUMMARY





DESCRIPTION

Refer to the EVAP System Component Tests and General Diagnostics.

INSPECTION PROCEDURE

Refer to the EVAP System Component Tests and General Diagnostics.

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 (included in the hybrid vehicle control ECU), 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 of sequence B and sequence E is large.