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. Refer 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:
- Determine which test orifice is to be used by 0.5 mm (0.020 in).
- Unwind nitrogen/smoke hose completely from bracket to optimize tester's performance.
Connect nitrogen/smoke hose (2) to correct test orifice (3) on bottom-front of tester.
Press and release remote switch (4) to activate tester.

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

Fig 2: Identifying Red Flag On Flowmeter And Floating Indicator
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 On Fuel Cap Adapter
Courtesy of SUZUKI OF AMERICA CORP.
Push engine switch to change ignition mode of keyless push start system to "ON" without depressing brake pedal (CVT model) or clutch pedal (M/T model).
WARNING: To prevent personal injury and equipment damage, tests with Evaporative Emission System Tester must be performed with engine stopped.
Close the EVAP canister vent valve in EVAP leak check module. Refer to step 6) of EVAPORATIVE EMISSION SYSTEM SMOKE TEST .
Disconnect suction pipe from air port (1) of EVAP leak check module, see EVAP CANISTER / EVAP LEAK CHECK MODULE ASSEMBLY REMOVAL AND INSTALLATION .
Plug air port with rubber plug.
Evaporative emission system should now be sealed and ready to be tested.

Fig 4: Identifying Air Port
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 charge system with nitrogen gas. Watch flowmeter's indicator until it stabilizes.
NOTE:
- Remote switch operates 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 floating indicator position is above red flag, result is UNACCEPTABLE. Locate and repair a leak, see EVAPORATIVE EMISSION SYSTEM SMOKE TEST .
2. If floating indicator position is below red flag, result is ACCEPTABLE. Test is completed.
  
  Fig 5: Identifying Floating Indicator Position And Red Flag (Unacceptable And Acceptable)
  Courtesy of SUZUKI OF AMERICA CORP.
Press and release remote switch to deactivate tester.
Charge battery if necessary.