Diagnosis & Repair
WARNING: This page is about a different car, the 2003 Toyota MR2. 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.
NOTE:
In order to minimize time wasted diagnosing DTCs P0442 or P0456, it is recommended to perform "Confirmation Readiness Test" first to verify EVAP system readiness status and confirmation of DTC. See TEST DRIVE CONFIRMATION .
For diagnosis and repair procedure with Toyota Hand-held tester or an Enhanced OBD II scan tool, see Fig 2-Fig 10 .
For diagnosis and repair procedure with OBD II scan tool (Non Enhanced), see Fig 10-Fig 18 .
For EVAP system circuit wiring diagram, see Fig 1. For location of emission related components, see Figure.
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 10: DTCs P0442 & P0456 Diagnostic Procedure Using Toyota Hand-Held Tester (Steps 24-25); Using OBD II Scan Tool (Steps 1-2)