Evaporative Emissions System: Service and Repair

INSPECTION PROCEDURE
Whenever the DTC diagnostics lead to a no trouble found or a purge solenoid replacement, proceed with the following charcoal canister diagnostics.

NOTICE: Use the [1][2]EVAP diagnostic cart J 41413 in order to provide a clean, dry, low pressure gas source. Do not substitute any other pressurized gas source because damage may result to the EVAP system. The J 41413 is required to provide a clean, dry, low pressure gas source. Do not substitute any other pressurized gas source or damage to the EVAP system may result.

1. Turn the ignition OFF.
2. Remove the EVAP canister purge solenoid from the vehicle.
3. Lightly tap the EVAP canister purge solenoid on a clean work area.
4. Look for carbon particles existing from either of the vacuum ports.
5. If no carbon release is evident, reinstall the components. Continue with the published service manual DTC procedures.
6. If carbon is being released from either component, continue with this service procedure.
7. Remove the charcoal canister from the vehicle.
8. Turn off the main cylinder valve (1) on the [1][2]EVAP purge/pressure diagnostic station J 41413.
9. Disconnect the black hose (4) that connects the nitrogen cylinder to the cart J 41413 at the pressure regulator (5).
10. Using a section of the vacuum hose, connect one end onto the open fitting of the J 41413 pressure regulator (5).
11. Connect the other end of the vacuum line side of the [1][2]EVAP purge line at the vehicle.
12. Turn on the main nitrogen cylinder valve (1).
13. Continue to blow any debris from the purge line for 15 seconds.
14. Return the J 41413 to its original condition by re-installing the black hose (4) disconnected in step 9.
15. Replace the EVAP purge solenoid and the charcoal canister with the new components.