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.
To aid in diagnosis of a deteriorated TWC, perform Confirmation Engine Racing Pattern Procedure first. See CONFIRMATION ENGINE RACING PATTERN .
For diagnosis and repair procedure, see Fig 1.
For location of emission related components, see Figure.
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.