Circuit Description
WARNING: This page is about a different car, the 2003 Isuzu Rodeo Sport, 2003 Isuzu Rodeo, and 2003 Isuzu Axiom. However, it is still accessible from the selected car via links, so may be relevant.
Canister purge is controlled by a solenoid valve that allows manifold vacuum to purge EVAP canister. PCM supplies ground to energize the solenoid valve (purge On). EVAP purge solenoid On time is determined by engine operating conditions including load, throttle position, coolant temperature and ambient temperature. Duty cycle is calculated by the PCM and the purge solenoid is enabled when appropriate conditions have been met:
- Engine run time after start is 60 seconds or more.
- Engine coolant temperature is 86°F (30°C) or more.
- Fuel control system is operating in closed-loop mode.