Canister Purge Control Valve: Testing and Inspection

Measuring Evaporative Emission (EVAP) Canister Purge Valve Resistance:

Inspecting Evaporative Emission (EVAP) Canister Purge Valve:

WARNING: Do not suck air through the Evaporative Emission (EVAP) canister purge valve tubes or hoses. The fuel vapor inside the EVAP canister purge valve is harmful.

Tool Required: J 39200 Digital Multimeter

PROCEDURE
1. Disconnect the EVAP Canister Purge Valve electrical connector.
2. Using a DMM (J 39200), measure the resistance of the EVAP Canister Purge Valve between both terminals. The resistance should be 33 to 39 ohms at 20°C (68°F).
^ Replace the EVAP Canister Purge Valve if the resistance is not 33 to 39 ohms at 20°C (68°F). Refer to Evaporative Emission (EVAP) Canister Purge Valve Replacement. If the resistance is within specification, proceed to Step 3.
3. Disconnect the EVAP Canister Purge Valve vacuum hoses from the intake manifold and the vacuum pipe (from the EVAP canister).
4. Blow air into the EVAP Canister Purge Valve vacuum hose that was disconnected from the vacuum pipe. Air should not pass through the EVAP Canister Purge Valve and exit from the intake manifold hose.
5. Connect 12 volts DC to the EVAP Canister Purge Valve electrical terminals.
6. Blow air into the EVAP Canister Purge Valve vacuum hose that was disconnected from the vacuum pipe. Air should pass through the EVAP Canister Purge Valve and exit from the intake manifold hose.
^ Replace the EVAP Canister Purge Valve if it failed this inspection. Refer to Evaporative Emission (EVAP) Canister Purge Valve Replacement.
7. Reconnect the EVAP Canister Purge Valve vacuum hoses and electrical connector.