Pressurization Test

WARNING: If any gas other than nitrogen gas is used, the gasoline in the fuel system may ignite and explode.
Be sure to use only nitrogen gas for this inspection.

NOTE: A large difference between vehicle temperature and shop temperature will seriously affect accuracy of test. Always allow enough time for vehicle's temperature to adjust to shop temperature.
If pressure regulator is replaced, perform calibration referring to OUTPUT PRESSURE CALIBRATION described earlier.

Connect red battery clip from tester to positive battery terminal, and then connect black battery clip from tester to chassis ground.
NOTE: Vehicle battery must be fully charged for optimum tester performance.
Turn NITROGEN/SMOKE valve (1) on front control panel to NITROGEN position.
NOTE: Unwind nitrogen/smoke hose completely from bracket to optimize tester's performance.
Connect nitrogen/smoke hose (2) to 0.020 in. (0.5 mm) test orifice (3) on bottom-front of tester.
Press and release remote switch (4) to activate tester.

Fig 1: Connecting Nitrogen/Smoke Hose To Test Orifice On Bottom-Front Of Tester
Courtesy of SUZUKI OF AMERICA CORP.
Position red flag (1) on flow meter in alignment with the floating indicator (2). Then press and release remote switch to deactivate tester.

Fig 2: Identifying Red Flag On Flowmeter
Courtesy of SUZUKI OF AMERICA CORP.
Disconnect nitrogen/smoke hose from test orifice.
Connect nitrogen/smoke hose to fuel cap adapter (1).
Remove fuel cap, and then install fuel cap adapter onto fuel filler neck.
Install fuel cap (2) onto fuel cap adapter.
NOTE: Connections must be tight and leak-free.

Fig 3: Identifying Fuel Cap Adapter And Fuel Cap
Courtesy of SUZUKI OF AMERICA CORP.
Turn ignition switch to ON leaving the engine turned OFF.
WARNING: There is a risk of personal injury and damage to the tester if the evaporative emission system tester is used while the engine is running.
Make sure the engine is off before performing the test.
Using scan tool, close canister vent valve.
Special Tool

: SUZUKI scan tool (SUZUKI-SDT)
Disconnect air suction pipe (1).
Plug air suction pipe (1) with finger or rubber plug.
Evaporative emission system should now be sealed and ready to be tested.

Fig 4: Identifying Air Suction Pipe
Courtesy of SUZUKI OF AMERICA CORP.

NOTE: Be sure to block the ventilation nozzle of the EVAP leak check module securely when performing the test. If the ventilation nozzle of the EVAP leak check module is not blocked securely, the module is open to the atmosphere through the leak detection pump even with the EVAP canister vent valve and the EVAP canister purge valve both closed. Nitrogen gas will then leak through the nozzle, giving a false indication of leakage.
Press and release remote switch to change system with nitrogen gas. Watch indicator of until it stabilizes.
NOTE:
- Remote switch operates in a push ON, push OFF manner.
- Large volume fuel tanks or tanks with lower fuel levels may require several minutes to be filled with nitrogen.
Compare floating indicator position to the red flag and make judgement as follows.
1. If indicator floats above red flag, result is UNACCEPTABLE. Locate and repair a leak. Refer to Evaporative Emission System Smoke Test (EVAP-Leak-Check Model) .
2. If indicator floats below red flag, result is ACCEPTABLE. Test is completed.
  
  Fig 5: Identifying Floating Indicator Position To Red Flag
  Courtesy of SUZUKI OF AMERICA CORP.
Press and release remote switch to deactivate tester.
Charge battery as necessary.