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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 with Toyota Hand-held tester or an Enhanced OBD II scan tool, see Fig 1-Fig 7 .

For diagnosis and repair procedure with OBD II scan tool (Non Enhanced), see Fig 8-Fig 13 .

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 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: DTCs P0441 & P0446 Diagnostic Procedure Using Hand Held Tester (Steps 1-4)

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Fig 2: DTCs P0441 & P0446 Diagnostic Procedure Using Hand Held Tester (Steps 5-11)

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Fig 3: DTCs P0441 & P0446 Diagnostic Procedure Using Hand Held Tester (Steps 12-13)

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Fig 4: DTCs P0441 & P0446 Diagnostic Procedure Using Hand Held Tester (Steps 14-16)

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Fig 5: DTCs P0441 & P0446 Diagnostic Procedure Using Hand Held Tester (Steps 17-19)

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Fig 6: DTCs P0441 & P0446 Diagnostic Procedure Using Hand Held Tester (Steps 20-22)

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Fig 7: DTCs P0441 & P0446 Diagnostic Procedure Using Hand Held Tester (Steps 23-26)

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Fig 8: DTCs P0441 & P0446 Diagnostic Procedure Using OBD II Scan Tool (Steps 1-6)

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Fig 9: DTCs P0441 & P0446 Diagnostic Procedure Using OBD II Scan Tool (Steps 7-10)

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Fig 10: DTCs P0441 & P0446 Diagnostic Procedure Using OBD II Scan Tool (Steps 11-12)

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Fig 11: DTCs P0441 & P0446 Diagnostic Procedure Using OBD II Scan Tool (Steps 13-14)

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Fig 12: DTCs P0441 & P0446 Diagnostic Procedure Using OBD II Scan Tool (Steps 15-16)

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Fig 13: DTCs P0441 & P0446 Diagnostic Procedure Using OBD II Scan Tool (Steps 17-19)

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Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002