Pic. 2.222. Evaporative Emission System Schematic
Checking the evaporative emission system
Pic. 2.223. Evaporative Emission System Test Diagram
Disconnect the vacuum hose from the throttle body and connect a hand vacuum pump to the vacuum hose.
Check the vacuum at the indicated engine operating conditions when the engine is cold (coolant temperature 60°C or lower) and when the engine is warm (coolant temperature 80°C or higher).
Adsorber check
Check the evaporative emission system lines for loose connections, sharp kinks or damage.
Check for deformation, cracks and fuel leaks.
Pic. 2.224. Adsorber
After removing the adsorber, check it for cracks and deformation (pic. 2.224).
Checking the canister purge solenoid valve
Note. When disconnecting vacuum hoses, always pre-mark alignment marks so that the hoses are set in their original position when connected.
Disconnect the vacuum hose from the canister purge solenoid valve.
Disconnect the harness connector from the solenoid valve.
Connect a hand vacuum pump to the solenoid valve fitting from which the hose with the red stripe was disconnected.
Battery voltage | Working condition |
Served | Vacuum decreases |
Not served | Vacuum is maintained |
Pic. 2.225. Test circuit when connecting / disconnecting battery power to the solenoid valve terminals
Apply vacuum and test valve operation when connecting/disconnecting battery power to solenoid valve terminals (pic. 2.225).
Pic. 2.226. Resistance measurement between solenoid valve terminals
Measure the resistance between the terminals of the solenoid valve (pic. 2.226).
Canister purge solenoid valve: winding resistance - 26 ohms (at 20°С).