Dtc Summary

DTCs

Monitoring Items

Malfunction Detection Conditions

Trouble Areas

Detection Timings

Detectio n Logic

P2401

Leak detection pump stuck OFF

Leak detection pump creates negative pressure through reference orifice, and EVAP system pressure measured to determine leak criterion. 0.02 inch leak criterion is measured at start and at end of leak check.

If system pressure higher than -1.06 kPa (-7.95 mmHg)*, or lower than -4.85 kPa (-36.38 mmHg)*, ECM determines that leak detection pump stuck OFF.

• Canister pump module

• Connector/wire harness (Canister pump module -ECM)

• Leakage from EVAP system

While ignition switch OFF

2 trip

P2402

Leak detection pump stuck ON

Leak detection pump creates negative pressure through reference orifice, and EVAP system pressure measured to determine leak criterion. If system pressure higher than -1.06 kPa (-7.95 mmHg)*, or lower than -4.85 kPa (-36.38 mmHg)*, ECM determines that leak detection pump stuck ON.

• Canister pump module

• Connector/wire harness (Canister pump module -ECM)

• ECM

While ignition switch OFF

2 trip

: The threshold values vary according to the atmospheric pressure measured in operation A. The values described in the table above are based on an atmospheric pressure of 100 kPa (750.1 mmHg). HINT:

The leak detection pump is built into 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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