System Inspection

Engine Control
P0456 Evaporative Emission System-Leak detected (very small leak) - Inspection/Repair:_:System Inspection

System Inspection

Vapor Line Diagram & Test Condition
1. Disconnect Hose from PCSV goes to fuel tank
2. Block the hole at the end of disconnected hose with a appropriate plug
3. Remove Canister Service Hall Cover underneath rear seat or trunk luggage floor
4. After disconnecting Vapor line coupler, install a Vacuum pump & gauge on the Hose to PCSV
5. Check vacuum leakage through the Vapor Line with Hand Vacuum Pump operation





Specification :

- Normal condition (No Leakage)





- Abnormal condition (Leakage)




6. Does a leak exist?





CCV & Canister Line Diagram & Test Condition ( Separated Structure of FTPS & Canister )
1. Connect Vacuum pump & gauge to one of the disconnected vapor line hoses that goes to Canister.
2. After disconnecting hose that attaches to the Canister and Fuel tank, block the hole up with appropriate plug

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

3. Close the CCV with Actuation test function on GDS

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

4. Check leakage between CCV and Canister line with vacuum pump & gauge operation





Specification :

- Normal Condition





- Abnormal Condition




5. Does a leak exist?





Determine whether the cause of leakage is Canister or CCV
1. Disconnect CCV from the Canister
2. Block the hole of the port on the CCV with appropriate plug
3. Check for vacuum leak through the Canister line by operating vacuum pump and gauge





Specification :

- Abnormal Condition ( CCV Leakage )





- Abnormal Condition ( Canister Leakage )




4. Does a leak exist?