Technical Description
- ECM (M/T) or PCM (A/T) detects a "stuck open" state of the evaporative emission purge solenoid valve and "stuck closed" state of the evaporative emission ventilation solenoid valve by monitoring pressure changes in the fuel tank.
- The "stuck open" state of the evaporative emission purge solenoid valve is judged through monitoring leaks in the evaporative emission control system.
- The "stuck closed" state of the evaporative emission ventilation solenoid valve is judged after 20 seconds of end of monitoring leak of evaporative emission control system, or of usual operation of evaporative emission purge solenoid from ON to OFF.