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Home >> Suzuki >> 2003 >> XL-7 Base, RWD >> Repair and Diagnosis >> Engine Performance >> System >> Auxiliary Emission Control Devices >> H25 Engine >> Diagnostic Information and Procedures >> Evaporative Emission System Smoke Test
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Evaporative Emission System Smoke Test

WARNING: Use the nitrogen gas. If other kind of gas is used for the nitrogen gas, the gasoline may ignite and explode.
CAUTION: Do not introduce smoke Into any other systems than the evaporative emission system in order to prevent performance degradation of the other systems.
NOTE:
  • The vehicle battery must be fully charged for optimum tester performance.
  • It is not recommended to use the tester In an outside repair bay area, because wind and/or bright sunlight could make the tester very difficult to read.
  1. Connect the red battery clip from the tester to the positive battery terminal, then connect the black battery clip from the tester to chassis ground.
    NOTE: Completely unwind the nitrogen/smoke hose from the bracket to optimize the tester's performance.
  2. Connect the nitrogen/smoke hose (1) onto the fuel cap adapter (2).
    Fig 1: Connecting Nitrogen/Smoke Hose Onto Fuel Cap Adapter
    G01374937Courtesy of SUZUKI OF AMERICA CORP.
  3. Remove fuel cap, then install fuel cap adapter onto the fuel filler neck.
  4. Install fuel filler cap (3) onto the fuel cap adapter.
    NOTE: Connections must be tight and leak-free.
  5. Identify the evaporative emission system type of the vehicle under repair referring to Table of Evaporative System Type  .
  6. If the system type is A-type, open the tank pressure control valve (1) according to the following procedures.
    1. Disconnect vacuum hose from the tank pressure control valve.
    2. Using a special tool, apply vacuum to the vacuum port on the tank pressure control valve.

    Special tool 

    1. (A):  09917-47910
    Fig 2: Applying Vacuum To Vacuum Port On Tank Pressure Control Valve
    G01374938Courtesy of SUZUKI OF AMERICA CORP.
  7. If the system type is B-type, open the tank pressure control solenoid valve according to the following procedures.
    1. Confirm the ignition switch it turned OFF.
    2. Using a service wire (2), connect the ECM connector terminal for the pressure control solenoid valve and body ground.
      Fig 3: Connecting ECM Connector Terminal For Pressure Control Solenoid Valve & Body Ground
      G01374939Courtesy of SUZUKI OF AMERICA CORP.
  8. Turn the ignition switch ON leaving the engine OFF.
    WARNING: To prevent personal injury and equipment damage, tests with Evaporative Emission System Tester are performed with the engine OFF.
  9. Using the scan tool, close the canister vent valve.

    The evaporative emission system should be sealed and ready to be tested.

    1. (A):  09917-47910
  10. Turn the NITROGEN/SMOKE valve (1) on the control panel to SMOKE.
    Fig 4: Turning NITROGEN/SMOKE Valve On Control Panel To SMOKE
    G01374940Courtesy of SUZUKI OF AMERICA CORP.
  11. Press and release the remote switch to activate the tester and inject smoke into the EVAP system.
    NOTE: The remote switch operates in a push ON, push OFF fashion.
  12. Disconnect EVAP canister purge hose (1) from EVAP canister purge valve (2) and check that smoke comes out of it in order to verify smoke is filled the EVAP system.
    NOTE: Inject smoke In less than two-minute cycles for optimum tester performance.
    Fig 5: Disconnecting EVAP Canister Purge Hose From EVAP Canister Purge Valve
    G01374941Courtesy of SUZUKI OF AMERICA CORP.
  13. Press and release the remote switch to deactivate the tester.
  14. Connect EVAP canister purge hose to EVAP canister purge valve.
  15. Introduce smoke into the system for an additional 60 seconds.
  16. Continue introducing smoke at 15 second intervals, as necessary.
    NOTE: For optimum visual smoke performance, deactivate the smoke flow and allow the system pressure to drop. Allowing the smoke to exit small holes at a low flow rate greatly enhances visibility.
  17. Using the halogen light (1), inspect the entire EVAP system path, and look for the source of the leak indicated by the exiting smoke. Introduce smoke at 15 second intervals, as needed, until leak source is identified.
    NOTE: Using the ultraviolet light (2) and shield glasses (3) if available, the exact location of the leak can be identified. The Ultra Trace UV(tm), which has been deposited at the exact location of the leak, fluoresces by shinning the ultraviolet light. Once the area of the leak is identified by the exiting smoke, trying this method is helpful when the leak is in an area that is not readily visible.
    Fig 6: Using Halogen Light To Inspect For Source Of Leak
    G01374942Courtesy of SUZUKI OF AMERICA CORP.
  18. Repair the leak once it is identified.
  19. Perform the pressurization test again referring to Evaporative Emission System Leak Inspection  and check whether the leak is completely repaired.
  20. Charge the battery as necessary.
    NOTE: After the tester has been used in SMOKE mode, smoke may condense inside the nitrogen/smoke hose, turning into an oil.

    Over time, this buildup of oil could degrade the performance of the tester. Use the following procedure any time the tester has been used in SMOKE mode and will be set aside for a long period of time.

    1. Close the valve on the nitrogen tank.
    2. Disconnect the nitrogen/smoke hose from the vehicle.
    3. Turn the NITROGEN/SMOKE valve to NITROGEN.
    4. Press and release the remote switch to activate the tester and purge any residual smoke from the nitrogen/smoke hose.
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