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 2-Fig 3 .

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

For ECM location, see Figure. For ECM connector terminal view, see Figure. For TPS circuit wiring diagram, see Fig 1. For location of emission related components, 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: 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 Using OBD II Scan Tool