P0450

SYSTEM/WIRING DIAGRAM

SYSTEM/CIRCUIT DESCRIPTION
While engine running, ECM (PCM) closes EVAP canister air valve and opens EVAP canister purge valve. If EVAP emission control system is in good condition, EVAP emission control system pressure that detected by fuel pressure sensor becomes down. After that, ECM (PCM) closes EVAP canister purge valve leaving EVAP canister air valve is closed. If EVAP emission control system is in good condition, the fuel tank pressure rises specified rate.




DTC DETECTING CONDITION AND TROUBLE AREA

DTC CONFIRMATION PROCEDURE

NOTE: Check to make sure that following conditions are satisfied when using this DTC CONFIRMATION PROCEDURE.

- Intake air temperature: between -14°C and 70°C (6.8°F and 158°F)
- Atmospheric pressure: higher than 560 mm.Hg (Altitude: lower than 2790 m (9150 ft))
- Following DTCs are not detected: P1450 and P1451
1. With ignition switch OFF, connect scan tool.
2. Turn ON ignition switch and clear DTC by using scan tool if any.
3. Start engine and run it for 10 sec.
4. Check DTC and pending DTC by using scan tool.




DTC TROUBLESHOOTING (DTC PO450)