Diagnosis & Repair

WARNING: This page is about a different car, the 2003 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Verify with customer if fuel tank cap has been left off or not completely tightened recently. This may cause DTC to be set. Using Toyota hand-held tester or scan tool, read FREEZE FRAME data. Freeze frame data records engine conditions when malfunction is detected. When ENGINE RUN TIME in freeze frame data is less than 200 seconds, check EVAP VSV, charcoal canister and vapor pressure sensor.

For diagnosis and repair procedure, see Fig 2-Fig 5 .

For EVAP system circuit wiring diagram, see Fig 1. For component locations, see Fig 6.

For ECM location, see Figure. For ECM connector terminal view, see Figure.

For vacuum or EVAP hose routing, see VACUUM DIAGRAMS article. For testing of systems or components, see SYSTEM & COMPONENT TESTING - 4-CYLINDER article. For removal and installation of components, see REMOVAL & INSTALLATION - 4-CYLINDER article.

Fig 1: EVAP System Circuit Wiring Diagram

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: DTC P0440 Diagnostic Procedure (Steps 1-4)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 3: DTC P0440 Diagnostic Procedure (Steps 5-8)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 4: DTC P0440 Diagnostic Procedure (Steps 9-10)

Fig 5: DTC P0440 Diagnostic Procedure (Steps 11-12)

Fig 6: Locating Emission System Components