Diagnosis & Repair
WARNING: This page is about a different car, the 2003 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
In order to minimize time wasted time diagnosing DTCs it is recommended to perform "Confirmation Readiness Test" first to verify EVAP system readiness status and confirmation of DTC. See CONFIRMATION READINESS TEST .
NOTE:
If procedure requires EVAP Leak Check, see EVAP LEAK CHECK .
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 records engine conditions when malfunction is detected. When ENGINE RUN TIME in freeze frame data is less than 200 seconds, check vapor pressure sensor.
For diagnosis and repair with Toyota Hand-held tester or an Enhanced OBD II scan tool, see Fig 1Fig 9 . For diagnosis and repair with OBD II scan tool (Non Enhanced), see Fig 13-Fig 21 .
For location of EVAP control system components, see Fig 10 & Fig 11 . For EVAP Emission Control System Wiring Diagram, see Fig 12. For ECM location, see Figure. For ECM connector terminal view, see Figure. For testing of systems or components, see SYSTEM & COMPONENT TESTING - V6 & V8 article. For removal and installation of components, see REMOVAL & INSTALLATION - V6 & V8 article.
Fig 8: DTCs P0441, P0442, P0446 & P0456 Diagnostic Procedure Using Hand-Held Tester (Step 17 Cont. & Steps 18-20)