EVAP Canister Purge Valve Inspection

WARNING: This page is about a different car, the 2004 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Measuring EVAP Canister Purge Valve Resistance

Courtesy of GENERAL MOTORS CORP.

CAUTION: Refer to Fuel Vapors in Evaporative Emission (EVAP) Components Caution in Cautions and Notices.

Remove the EVAP canister purge valve. Refer to Evaporative Emission (EVAP) Canister Purge Solenoid Valve Replacement .
Use a DMM in order to measure the resistance of the EVAP canister purge valve.
Measure: The EVAP canister purge valve resistance should be 27-33 ohms at 20° C (68° F).
Replace the EVAP canister purge valve if the resistance is not within the specified range. The solenoid will damage the powertrain control module (PCM) if the resistance value is less than 27 ohms.
Check the PCM and replace if necessary. Refer to Powertrain Control Module (PCM) Replacement .

Fig 2: Checking Continuity Terminal Between Valve Body

Courtesy of GENERAL MOTORS CORP.

Check for continuity of each terminal to the valve body.
Replace the EVAP canister purge valve if continuity is present.

Fig 3: EVAP Canister Purge Valve Test

Courtesy of GENERAL MOTORS CORP.

Blow air into one of the ports. The air should NOT flow through the opposite port.
Apply battery voltage across the terminals of the EVAP canister purge valve.
Blow air into the one port. The air should flow easily to the opposite port.
Replace the EVAP canister purge valve if the valve failed either test. Refer to Evaporative Emission (EVAP) Canister Purge Solenoid Valve Replacement .