EVAP Canister Purge Valve
WARNING: This page does not describe the selected car, but rather 31 other vehicles, including the 2003 Mercury Sable, 2003 Mercury Mountaineer, 2003 Mercury Marauder, 2003 Mercury Grand Marquis, and 2003 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
EVAP canister purge valve resistance reading must be taken with engine cooled down.
Turn ignition switch to OFF position. Disconnect EVAP canister purge valve. Using a DVOM, measure resistance between EVAP canister purge valve terminals. If resistance is not 30-38 ohms, replace EVAP canister purge valve. Perform EVAPORATIVE EMISSIONS SYSTEM LEAK TEST under EVAPORATIVE EMISSION SYSTEM TESTS to verify repair. If resistance is 30-38 ohms, EVAP canister purge valve is okay. If fault is still present, perform TEST HX: EVAPORATIVE EMISSION MONITOR & SYSTEM under SYSTEM TESTS in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article.