Procedure if leak detected

WARNING: This page is about a different car, the 2003 Saab 9-3. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Evaporative Emission System Diagram

Courtesy of SAAB-SCANIA OF AMERICA, INC.

The shut-off valve must still be activated.
Detach the line from the purge valve on the intake manifold.
Pressurize the system further as described in the Kent-Moore instruction manual.
Detect the leak with the Ultrasonic Leak Detector J41416. Start from the line detached from the intake manifold and work through the lines and components in the system. Perform a visual inspection at the same time.
NOTE: It may be necessary to lower the tank slightly to be able to check for possible leaks in the components on top of the tank.

NOTE: The ultrasonic leak detector is sensitive to ambient noise such as exhaust extractors, pneumatic machines, air nozzles, leaking pneumatic connections, etc.
The workshop ventilation system can create currents of air that can also affect the equipment.
Everything mentioned above can cause a similar, but incorrect, result/detection as a leaking EVAP system.
Adjust the sensitivity of the detector to filter out ambient, in many cases, interfering noise.
NOTE: Major leaks such as a defective shut-off valve or loose hose are difficult to detect as they do not have the "right sound" to be detected by the ultrasonic leak detector.
Therefore, it is important to perform a visual inspection and component check of the system if there is a very quiet leak.
When the leak has been detected and rectified, check the integrity of the system again.
Restore the care to its original state.