J 41413 EVAP Pressure/Purge diagnostic station

1. Remove the left fuel rail cover.



2. Turn OFF the ignition.
3. Remove the purge solenoid vacuum line and the vacuum switch from the vehicle.



4. Remove the EVAP purge solenoid from the engine.
5. Lightly tap the purge solenoid and the vacuum switch on a clean work area looking for carbon particles or carbon dust exiting either of the vacuum ports.
6. If no carbon release is evident, reinstall the components and continue with the published service manual DTC procedures.
7. If carbon is being released from either component, continue with this service procedure.



8. Remove the right fuel tank, refer to Fuel Tank Replacement . Remove the charcoal canister from the vehicle. Refer to Evaporative Emission Canister Replacement .
9. Ensure the main cylinder valve is turned off on the EVAP purge/pressure diagnostic station J 41413.
10. Disconnect the black hose that connects the nitrogen cylinder to the cart J 41413 at the pressure regulator by unscrewing the knurled nut on the regulator.
11. Using a section of vacuum line, connect one end over the open fitting of the J 41413 pressure regulator.
12. Connect the remaining end to the purge solenoid end of the EVAP purge line at the vehicle.
13. Turn on the main nitrogen cylinder valve and continue to blow any debris from the purge line for 15 seconds.
14. Return the EVAP Pressure/Purge Diagnostic Station J 41413 to its original condition by re-installing the black hose disconnected in step 8.
15. Manifold vacuum vehicles proceed with published service manual diagnostics.
16. Using a scan tool display data parameter EVAP vacuum switch.
17. Idle the engine at the normal operating temperature.
18. Open the throttle until engine speed reaches 2000 RPM.
19. If the EVAP vacuum switch changes state Go to Step 19.
20. If the vacuum switch does not change state, repair the low source vacuum condition by performing a complete throttle body service. This includes the cleaning of the purge ports. Go to Step 14.
21. If the EVAP vacuum switch does change state, proceed with the published service manual diagnostics.
22. Connect the EVAP diagnostic cart J 41413 to the vehicle EVAP service port and turn the 4 position switch to Purge.
23. Idle the engine at the normal operating temperature.
24. Open the throttle until engine speed reaches 2000 RPM.
25. Observe the H20 vacuum gauge on the EVAP cart. Vacuum should read greater than 15 in. H20.
26. If the vacuum is less than 15 in. H20, perform a complete throttle body service. This includes the cleaning of the purge ports as outlined in the service manual. Go to Step 20.
27. If the vacuum is greater than 15 in. H20, continue with the published service diagnostics.