Evaporative Emissions System: Testing and Inspection
Purge Control Inspection1. Start the engine.
2. Disconnect the vacuum hose between the purge solenoid valve and the charcoal canister.
3. Put a finger to the purge solenoid valve and verify that there is no vacuum applied when the engine is cold.
4. If there is a vacuum, check the PCM terminal 4T voltage, and purge solenoid valve.
5. Warm up the engine to the normal operating temperature.
6. Stop the engine.
7. Connect the Special Service Tool to the data link connector-2.
8. Turn the ignition switch to ON.
9. Select "PID/DATA MONITOR AND RECORD" and press TRIGGER.
10. Select "ECT" and press TRIGGER, then verify that the engine coolant temperature is above 60°C (140°F).
11. Press START
12. If the SST indicates below 60°C (140°F), inspect the engine coolant temperature sensor.
13. Select "SIMULATION TEST" and press TRIGGER.
14. Select "PRGV" and press TRIGGER.
15. Press START
16. Increase the duty valve of the purge solenoid valve to 50 % and check if the operation sound of the valve is heard.
a. If the operation sound is heard, check the loose or damaged vacuum hose. (Intake manifold - purge solenoid valve - charcoal canister)
b. If the operation sound is not heard, check the purge solenoid valve.