Diagnostic Aids

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The EVAP system can be filled with smoke more quickly and completely by opening the system opposite the end where the smoke is injected. When injecting smoke at the service port tool temporarily leave the EVAP Vent Solenoid Valve open until smoke is observed then close the system and continue testing.
To help locate intermittent leaks using the GE41413-A , move all EVAP components while observing smoke with the GE41413-SPT .
Individual components can be isolated and tested using adapters in the GE41413-300 .
When servicing the EVAP system, test pressure must not exceed 13 in H20 (0.5 psi) as pressure in excess of this could cause system components to perform inaccurately.
A condition may exist where a leak in the EVAP system only exists under a vacuum condition. This type of leak may be detected by using the scan tool Purge/Seal function to create a vacuum in the EVAP system and then observe the FTP Sensor parameter for vacuum decay.