LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Suzuki >> 2006 >> Grand Vitara Base, RWD, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Aux. Emission Control Devices >> Diagnostic Information And Procedures >> Evaporative Emission System Smoke Test
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Evaporative Emission System Smoke Test

WARNING: Use the nitrogen gas. If other kind of gas is used instead of the nitrogen gas, the gasoline may ignite and explode.
CAUTION:
  • Do not use smoke for any other systems except 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, and then connect the black battery clip from the tester to chassis ground.
    NOTE: Unwind the nitrogen/smoke hose completely from the bracket to optimize the tester's performance.
  2. Connect the nitrogen/smoke hose (1) onto the fuel cap adapter (2).
  3. Remove fuel cap, and 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.
    Fig 1: Identifying Nitrogen/Smoke Hose Onto Fuel Cap Adapter
    G04807197Courtesy of SUZUKI OF AMERICA CORP.
  5. 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.
  6. Using the scan tool, close the EVAP canister vent valve in EVAP leak check module.

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

    Special Tool 

    : SUZUKI scan tool 

  7. Turn the NITROGEN/SMOKE valve (1) on the control panel to SMOKE.
    Fig 2: Identifying Nitrogen/Smoke Valve
    G04807198Courtesy of SUZUKI OF AMERICA CORP.
  8. 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 manner.
  9. 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 3: Identifying EVAP Canister Purge Hose & EVAP Canister Purge Valve
    G04807199Courtesy of SUZUKI OF AMERICA CORP.
  10. Press and release the remote switch to deactivate the tester.
  11. Connect EVAP canister purge hose to EVAP canister purge valve.
  12. Charge smoke into the system for an additional 60 seconds.
  13. Continue charging 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.
  14. Using the halogen light (1), inspect the entire EVAP system path and look for any leak. Charge smoke at 15 second intervals, as needed, until leak source is identified. If any leak is not found, go to the next step. If any leak is found, skip the steps from 15) to  20 and go to the step  18.
    NOTE: Using the ultraviolet light (2) and shield glasses (3) if available, the exact location of the leak can be identified. The Ultra Trace UVTM, 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, this method is helpful when the leak is in an area that is not readily visible.
    Fig 4: Checking EVAP System Path & Look Using Halogen Light
    G04807200Courtesy of SUZUKI OF AMERICA CORP.
  15. Operate EVAP canister vent valve in EVAP leak check module as follows. If you have SUZUKI scan tool, perform the step  a. If not, perform the step  b.
    1. Using SUZUKI scan tool
      1. Connect SUZUKI scan tool to DLC (1) with ignition switch OFF.
      2. With ignition switch ON, turn ON and OFF EVAP canister vent valve in EVAP leak check module by using SUZUKI scan tool.

        Special Tool 

        1. SUZUKI scan tool 
          Fig 5: Connecting SUZUKI Scan Tool To DLC
          G04807201Courtesy of SUZUKI OF AMERICA CORP.
    2. Not using SUZUKI scan tool
      1. Turn ignition switch ON.
      2. Using service wire, ground "E23-13" terminal (1) of ECM connector (EVAP canister vent valve ON).
        Fig 6: Identifying E23-13 Terminal Of ECM Connector
        G04807202Courtesy of SUZUKI OF AMERICA CORP.
  16. Disconnect hose from the outlet nozzle (1) of EVAP leak check module.
  17. Plug outlet nozzle with finger or the rubber plug.
    CAUTION: The ventilation nozzle of EVAP leak check module must be blocked securely.
    The reason for this is that the EVAP system in its design cannot be sealed completely even though the EVAP canister vent valve and the EVAP canister purge valve are both closed because the leak check module internally opens to atmosphere through the leak detection pump. For this reason, if the ventilation nozzle of the leak check module is not blocked completely, smoke will leak through it possibly resulting in a diagnostic error of EVAP leak.
    Fig 7: Identifying Outlet Nozzle Of EVAP
    G04807203Courtesy of SUZUKI OF AMERICA CORP.
  18. Operate EVAP canister purge valve as follows. If you have SUZUKI scan tool, perform the step  a. If not, perform the step  b.
    1. Using SUZUKI scan tool
      1. Connect SUZUKI scan tool to DLC (1) with ignition switch OFF.
      2. With ignition switch ON, turn ON and OFF EVAP canister purge valve by using SUZUKI scan tool.

        Special Tool 

        1. SUZUKI scan tool 
        Fig 8: Connecting SUZUKI Scan Tool To DLC
        G04807204Courtesy of SUZUKI OF AMERICA CORP.
    2. Not using SUZUKI scan tool
      1. Turn ignition switch ON.
      2. Using service wire, ground "C37-10" (1) terminal of ECM connector (valve ON) and unground it (valve OFF).
        Fig 9: Identifying C37-10 Terminal Of ECM Connector
        G04807205Courtesy of SUZUKI OF AMERICA CORP.
  19. Disconnect hose form the outlet nozzle of EVAP canister purge valve.
  20. Check EVAP canister purge valve (1) for any leak when valve is switched ON and OFF by using SUZUKI scan tool or service wire. If check result is not described below, replace EVAP canister purge valve.

    EVAP canister purge valve specification 

    1. Valve OFF: Smoke should not come out of EVAP canister purge valve  .
    2. Valve ON: Smoke should come out of EVAP canister purge valve  .
      Fig 10: Identifying EVAP Canister Purge Valve
      G04807206Courtesy of SUZUKI OF AMERICA CORP.
  21. Repair the leak.
  22. Perform the pressurization test again referring to EVAPORATIVE EMISSION SYSTEM LEAK INSPECTION  and check whether the leak is completely repaired.
  23. 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 then purge any residual smoke from the nitrogen/smoke hose.
scientia non olet · About LEMON Manuals