Dtc Summary

DTCs

Monitoring Items

Malfunction Detection Conditions

P043E

Reference orifice clogged

Leak detection pump creates negative pressure through reference orifice, and EVAP system pressure measured to determine 0.02 inch leak criterion. 0.02 inch leak criterion measured at start and at end of leak check. If system pressure lower than -4.85 kPa (-36.38 mmHg)*, ECM determines that reference orifice has clogging malfunction.

P043F

Reference orifice high-flow

Leak detection pump creates negative pressure through reference orifice, and EVAP system pressure measured to determine 0.02 inch leak criterion. 0.02 inch leak criterion generated at start and at end of leak check. If system pressure higher than -1.06 kPa (-7.95 mmHg)*, ECM determines that reference orifice has high-flow malfunction.

Trouble Areas

Detection Timings

Detection Logics

Canister pump module

Connector/wire harness

(Canister pump module - ECM)

Leakage from EVAP system

While ignition switch OFF

2 trips

: The threshold values vary according to the atmospheric pressure measured at the beginning of the EVAP system monitor. The values described in the table above are based on an atmospheric pressure of 100 kPa (750.1 mmHg) (absolute pressure). HINT:

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

The circuit description can be found in the EVAP System (See page ES-351). Refer to the EVAP System (See page ES-351).

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