Canister Purge Control Valve: Testing and Inspection

Figure 1:

Figure 2:

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 J 39200, measure resistance of the EVAP canister purge valve between both terminals. If resistance is not 33 to 39 ohms at 20°C (68°F), replace the EVAP canister purge valve. If the resistance is within specification, proceed with Step 3.
3. Disconnect the EVAP canister purge valve vacuum hoses from the intake manifold and from the EVAP canister.
4. Blow air into the EVAP canister purge valve vacuum hose that was disconnected from the EVAP canister. 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 terminals.
6. Blow air into the EVAP canister purge valve vacuum hose that was disconnected from the EVAP canister. Air should pass through the EVAP canister purge valve and exit from the intake manifold hose.
7. If the EVAP canister purge valve failed this inspection, replace it. If the EVAP canister purge valve passed this inspection, reconnect the vacuum hoses and electrical connector.

Figure 1 Legend
1. EVAP Canister Purge Valve
2. J 39200

Figure 2 Legend
1. EVAP Canister Purge Valve
2. From EVAP Canister
3. To Intake Manifold