Diagnosis & Repair

WARNING: This page is about a different car, the 2003 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Using 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 2-Fig 3 .

For diagnosis and repair procedure with generic OBD II scan tool, see Fig 4.

For locating emission related components, see Figure.

For ECM location, see Figure. For ECM connector view, see Figure. For TPS 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: TP Sensor & Throttle Control Motor Circuit Wiring Diagram

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: DTCs P0120, P0122, P0123, P0220, P0222, P0223 & P2135 Diagnostic Procedure Using Hand Held Tester (Step 1)

Fig 3: DTCs P0120, P0122, P0123, P0220, P0222, P0223 & P2135 Diagnostic Procedure Using Hand Held Tester (Steps 2-5)

Fig 4: DTCs P0120, P0122, P0123, P0220, P0222, P0223 & P2135 Diagnostic Procedure (OBD II Scan Tool) (Steps 1-4)