EVAP Cleaning Procedure

1. Remove the EVAP canister.
2. Turn OFF the main valve on the J 41413.
3. Disconnect the hose from the diagnostic station pressure regulator.
4. Using a section of vacuum hose, connect one end to the diagnostic station pressure regulator.
5. Connect the other end of the vacuum hose to the canister side of the EVAP purge pipe.
6. Turn ON the main nitrogen cylinder valve and continue to discharge nitrogen for 15 seconds.
7. If the EVAP purge pipe is plugged and the nitrogen does not dislodge the carbon particles, replace the EVAP purge pipe. Refer to Evaporative Emission (EVAP) Hoses/Pipes Replacement - Engine/Chassis.
8. Return the J 41413 to its original condition.
9. Install a new EVAP canister.
10. Lower the vehicle.
11. Continue with the published service manual diagnostic trouble code (DTC) procedure.