Evaporative Emissions System: Testing and Inspection

1. Start and warm up the engine to the normal operating temperature.
2. Let the engine idle.
3. Disconnect the vacuum hose between the purge solenoid valve and the charcoal canister.
4. Put a finger to the purge solenoid valve and verify that there is no vacuum applied.
5. If there is vacuum, do as follows.
(1) Connect the SSTs (NGS).
(2) Verify that diagnostic trouble code No P0443 is not displayed. If code No. P0443 is shown, carry out troubleshooting of code No. P0443.
(3) If diagnostic trouble codes are not shown, check the following.
- Purge solenoid valve
6. Reconnect the vacuum hose.
7. Connect the SSTs (NGS).
8. Select the SIMULATION TEST function on the NGS display.
9. Increase the duty value of the purge solenoid valve from 0% to 100% by using the "PRGV". Operate the purge solenoid valve and check if the idle condition changes.
10. If the condition does not change, do as follows.
(1) Turn the ignition switch to ON.
(2) Verify that diagnostic trouble code No. P0443 is not displayed. If code No. P0443 is shown, carry out troubleshooting of code No. P0443.
(3) Select the SIMULATION TEST function on the NGS display.
(4) Increase duty value of the purge solenoid valve from 0% to 100% by using the "PRGV". Operate the purge solenoid valve and check if the operation sound of the valve is heard.
(1) If the operation sound is heard, check the loose or damaged vacuum hose.
(2) If the operation sound is not heard, check the purge solenoid valve.