EVAP Leak Check System Smoke Test
EVAP Leak Check System Smoke TestWARNING: 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 onto the fuel cap adapter (1).
3. Remove fuel cap, and then install fuel cap adapter onto the fuel filler neck.
4. Install fuel filler cap (2) onto the fuel cap adapter.
NOTE: Connections must be tight and leak-free.
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 as follows. If you have SUZUKI scan tool, perform the step a). If not, perform the step b). The evaporative emission system should be sealed and ready to be tested.
a. Using SUZUKI scan tool
i. Connect SUZUKI scan tool to DLC (1) with ignition switch OFF.
ii. Turn ignition switch to ON position, clear DTC and select Active Test mode on SUZUKI scan tool.
iii. Turn ON and OFF EVAP canister vent valve in EVAP leak check module by using SUZUKI scan tool.
Special Tool
(A) : SUZUKI scan tool (SUZUKI-SDT)
b. Not using SUZUKI scan tool
i. Connect special tool between ECM and ECM connector referring to Inspection of ECM and Its Circuits.
ii. Turn ignition switch ON.
iii. Using service wire, ground E01-59 terminal (1) of ECM connector (valve ON: B ) and unground it (valve OFF: A ).
7. Turn the NITROGEN/SMOKE valve (1) on the control panel to SMOKE.
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.
10. Press and release the remote switch to deactivate the tester.
11. Connect purge hose No.3 to intake manifold.
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 21).
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.
15. Using the scan tool, operate EVAP canister vent valve in EVAP leak check module referring to Step 6).
16. Disconnect pipe 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.
18. Operate EVAP canister purge valve as follows. If you have SUZUKI scan tool, perform the step a). If not, perform the step b).
a. Using SUZUKI scan tool
i. Connect SUZUKI scan tool to DLC (1) with ignition switch OFF.
ii. Turn ON ignition switch, clear DTC and select Active Test mode on SUZUKI scan tool.
Special Tool
(A) : SUZUKI scan tool (SUZUKI-SDT)
b. Not using SUZUKI scan tool
i. Connect special tool between ECM and ECM connector referring to Inspection of ECM and Its Circuits.
ii. Turn ignition switch ON.
iii. Using service wire, ground C01-13 terminal (1) of ECM connector (valve ON: B ) and unground it (valve OFF: A).
19. Disconnect pipe from 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
(A) Valve OFF: Smoke should not come out of EVAP canister purge valve.
(B) Valve ON: Smoke should come out of EVAP canister purge valve.
21. Repair the leak.
22. Perform the pressurization test again referring to EVAP Leak Check 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.
a. Close the valve on the nitrogen tank.
b. Disconnect the nitrogen/smoke hose from the vehicle.
c. Turn the NITROGEN/SMOKE valve to NITROGEN.
d. Press and release the remote switch to activate the tester, and then purge any residual smoke from the nitrogen/smoke hose.