Diagnosis & Repair
WARNING: This page is about a different car, the 2003 Toyota Land Cruiser. 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 or Enhanced OBD II scan tool, see Fig 1 & Fig 2 .
For diagnosis and repair procedure with generic OBD II scan tool, see Fig 3.
For ECM location, see Figure. For ECM connector terminal view, see Figure. For APP sensor circuit wiring diagram, see Fig 4. For location of emission related components, see Figure.
For testing of systems or components, see BASIC DIAGNOSTIC PROCEDURES - V6 & V8 article or 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 Hand Held Tester (Steps 1-3)
Fig 2: DTCs P2120, P2122 , P2123, P2125, P2127, P2128 & P2138 Diagnostic Procedure Using Hand Held Tester (Steps 4-5)