Detection Condition

WARNING: This page is about a different car, the 2003 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

PCM measures pump load current (EVAP line pressure) when specified period has passed after EVAP system is sealed when Monitoring Conditions are met. If load does not reach reference current value within specified period, PCM determines EVAP system has large leak.

Monitoring Conditions:

Atmospheric pressure: 21.33 in. Hg (541.8 mm Hg) or more
Battery voltage: 11-14.6 volts
Fuel tank level: 15-85 percent
IAT: 41-104°F (5-40°C)
IG switch off

This is an intermittent monitor (Evaporative System Monitor). MIL illuminates if PCM detects malfunction condition in two consecutive drive cycles or in one drive cycle while DTC for same malfunction has been stored in PCM. PENDING CODE is available if PCM detects malfunction condition during first drive cycle. FREEZE FRAME DATA is available. DTC is stored in PCM memory.