1.2L REVOTRON ENGINE 41 ECU. The purging takes place due to air drawn through the canister because of pressure differential between manifold vacuum and atmosphere. 5. Canister Purge Valve The canister purge valve is controlled by engine management system (EMS). The purging of canister takes place because of pressure differential between manifold vacuum and atmosphere. Fuel vapours are drawn into the intake manifold through canister purge valve operated by ECU. Inspection 1. With ignition switch OFF, disconnect connectors from canister purge valve. 2. Check resistance between two terminals of canister purge valve. Resistance 26 + 4 ohm at 200°C. If resistance is as specified, proceed to next operation, check. If not, replace. 3. Blow air into hose removed from T connector. 4. Verify that no air flows through the valve when the engine is stopped with purge valve connectors disconnected. 5. Air will pass through freely when the 12V battery voltage is applied to valve connector. It indicates that the valve is functioning properly. If no air flows, replace the valve. 6. Reinstall valve connector. 7. Reconnect vacuum hoses. Warning Do not suck air through purge valve. Fuel vapours inside valve is harmful.
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