Chevrolet Equinox Service Manual: Evaporative Emission System Cleaning Engine Control

Special Tools

J 41413-200 Evaporative Emissions System Tester

For equivalent regional tools, refer toSpecial Tools.

Inspection Procedure

Caution:Use the Evaporative Emission (EVAP) System Tester (EEST) GE41413-A in order to provide a clean, dry, low pressure nitrogen gassource. Do not substitute any other pressurized source, gas orotherwise. Damage may result to the EVAP system, test equipment orcause a safety risk.

Note:Proceed with the following procedure only if referenced by an evaporative emission(EVAP) diagnostic or repair procedure.

Turn OFF the ignition.Remove the EVAP canister purge valve. Refer toEvaporative Emission Canister Purge Solenoid Valve Replacement.Lightly tap the EVAP canister purge valve on a hard surface.Inspect for carbon particles exiting either of the vacuum ports.If no carbon particles were detected, but a blockage was detected during a diagnosticprocedure, install the original EVAP canister purge valve. Continue with the cleaningprocedure.If carbon particles are found during the inspection procedure, continue with the cleaningprocedure.If a diagnostic procedure directed you to replace the EVAP canister purge valve andno carbon particles were detected, replace the EVAP canister purge valve. Return tothe published service procedure.Cleaning ProcedureRaise and support the vehicle. Refer toLifting and Jacking the Vehicle.Remove the EVAP canister. Refer toEvaporative Emission Canister Replacement.Turn OFF the main valve on the J 41413-200 tester.Disconnect the hose from the diagnostic station pressure regulator.Using a section of vacuum hose, connect one end onto the EVAP pressure/purge diagnosticstation pressure regulator.Connect the other end of the vacuum hose to the canister side of the purge pipe.Turn ON the main nitrogen cylinder valve and continue to discharge nitrogen for 15-seconds.If the nitrogen does not clear the blockage, replace the purge pipe.Return the EVAP pressure/purge diagnostic station to the stations original condition.Install a new EVAP canister. Refer toEvaporative Emission Canister Replacement.Lower the vehicle.Install a new EVAP canister purge valve. Refer toEvaporative Emission Canister Purge Solenoid Valve Replacement.Return to the diagnostic table that sent you here.