Monitor Description
WARNING: This page is about a different variant/trim than selected.
When 5 hours have elapsed after the ignition switch is turned OFF, the electric vacuum pump creates negative pressure (vacuum) in EVAP system. Then ECM monitors for leaks and actuator malfunctions based on EVAP pressure.
While the engine running, the ECM is also monitoring time when the soak timer is running. When the soak timer and the ECM CPU's time values are different, the ECM interprets this as a malfunction, illuminates MIL and sets a DTC (2-trip detection logic).