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 2 . For diagnosis and repair procedure with generic OBD II scan tool, see Fig 3.
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 APP sensor circuit wiring diagram, see Fig 1. 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 1: DTCs P2120, P2122, P2123, P2125, P2127 P2128 & P2138 Diagnostic Procedure Using Toyota Hand-Held Tester (Steps 1-2)