System Inspection

Engine

Engine Control - P0442 Evaporative Emission System-Leak detected (small leak) System Inspection

System Inspection

Vapor Line Leak Test
1. Disconnect the vapor line from Purge Control Solenoid Valve (PCSV) on the fuel tank side.
2. Block the disconnected vapor line with an appropriate plug.
3. Remove the vapor line coupler at the canister. Install a hand vacuum pump on the vapor line between the canister and the PCSV.
4. Apply vacuum and check for leakage through the vapor line by watching the hand vacuum pump gauge.





Specification : Refer to Specification Graphics below.


- Normal condition (No Leakage)





- Abnormal condition (Leakage)




5. Does a leak exist?





Canister System Leak Test
1. Connect hand vacuum pump to one of the disconnected vapor lines that goes to Canister.
2. After disconnecting the hose that attaches to the Canister to the Fuel tank, block any unplugged lines with appropriate plug (s).

NOTE:
Remove the fuel tank if plugging hose is impossible on the vehicle

3. Using the GDS, close the Canister Close Valve (CCV) with the Actuation test function.

NOTE:
In case that fuel tank is removed, energize B+ and Ground for CCV closing

4. Apply vacuum and check for leakage in Canister/CCV/Vapor lines/etc.





Specification : Refer to Specification Graphics below.


- Normal condition (No Leakage)





- Abnormal condition (Leakage)




5. Does a leak exist?





Leakage Isolation Test
1. Disconnect the Canister Close Valve (CCV) from the canister.
2. On the canister, block the hole of the CCV port with an appropriate plug.
3. Apply vacuum and monitor leakage.





Specification : Refer to Specification Graphics below.


- Normal Condition (CCV Leakage)





- Abnormal Condition (Canister Leakage)




4. Does a leak exist?