Detection Condition

PCM measures purge line pressure, which is vacuum, when following conditions are met. If vacuum between charcoal canister and intake manifold does not reach specification, PCM determines that EVAP system is clogged.

• Engine speed: 1500-3550 RPM (MTX)
• Engine speed: 1220-3000 RPM (ATX)
• Throttle opening angle: 10.2-27.8 percent
• Vehicle speed: 43.1-84.3 MPH (MTX)
• Vehicle speed: 21.4-84.3 MPH (ATX)

This is an intermittent monitor (evaporative). 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.