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:
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 1.
For EVAP system circuit wiring diagram, see Figure. For component locations, see Figure.
For ECM location, see Figure. For ECM connector terminal view, see Figure.
For removal and installation of components, see REMOVAL & INSTALLATION - 4-CYLINDER article.