Diagnosis & Repair

WARNING: This page is about a different car, the 2003 Toyota Tundra. 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.

For diagnosis and repair procedure with Toyota hand-held tester, see Fig 1-Fig 6 . For diagnosis and repair procedure with generic OBD II scan tool, see Fig 7-Fig 12 .

For access to, or replacement of ECM, Engine Control Module (ECM) is located behind glove box. See Figure. For ECM connector view, see Figure. For circuit wiring diagram, see Figure. For vacuum or EVAP hose routing, see VACUUM DIAGRAMS article. For testing of systems or components, see BASIC DIAGNOSTIC PROCEDURES - V6 & V8 article or SYSTEM & COMPONENT TESTING - V6 & V8 article. For adjustments, see ON-VEHICLE ADJUSTMENTS - V6 & V8 article. For removal and installation of components, see REMOVAL & INSTALLATION - V6 & V8 article.

Fig 1: DTCs P0300-P0306 Diagnostic Procedure Using Toyota Hand-Held Tester (Step 1)

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Fig 2: DTCs P0300-P0306 Diagnostic Procedure Using Toyota Hand-Held Tester (Steps 2-3)

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Fig 3: DTCs P0300-P0306 Diagnostic Procedure Using Toyota Hand-Held Tester (Steps 4-5)

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Fig 4: DTCs P0300-P0306 Diagnostic Procedure Using Toyota Hand-Held Tester (Steps 6-8)

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Fig 5: DTCs P0300-P0306 Diagnostic Procedure Using Toyota Hand-Held Tester (Steps 9-14)

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Fig 6: DTCs P0300-P0306 Diagnostic Procedure Using Toyota Hand-Held Tester (Steps 15-17)

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Fig 7: DTCs P0300-P0306 Diagnostic Procedure Using OBD II Scan Tool (Steps 1-2)

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Fig 8: DTCs P0300-P0306 Diagnostic Procedure Using OBD II Scan Tool (Step 3)

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Fig 9: DTCs P0300-P0306 Diagnostic Procedure Using OBD II Scan Tool (Steps 4-6)

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Fig 10: DTCs P0300-P0306 Diagnostic Procedure Using OBD II Scan Tool (Steps 7-8)

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Fig 11: DTCs P0300-P0306 Diagnostic Procedure Using OBD II Scan Tool (Steps 9-13)

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Fig 12: DTCs P0300-P0306 Diagnostic Procedure Using OBD II Scan Tool (Steps 14-16)

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