What this node does
EVAP control meters fuel vapor from the charcoal canister into the intake by pulsing a purge solenoid. The Wiring node simply assigns which ECU output drives that solenoid. In most installs that's a digital pulsed output (DPO), since the solenoid is switched on and off at a duty cycle.
What to check
- The output you pick isn't already used by another function.
- The solenoid has its own switched 12V supply and the ECU is switching its ground side, matching how the output is configured.
- Test the output with the engine off and listen for the solenoid clicking.
Once it responds, tune the duty in Duty Cycle (O2 Active) and Duty Cycle (O2 Inactive), and see the main EVAP article for the full function.
Need this diagram? Ask us and we'll send it over with advice for your build.
