Diagnosis & Repair
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, see Fig 1. For circuit wiring diagram, see Fig 2.
When access to, or replacement of ECM is necessary, Engine Control Module (ECM) is located behind glove box. See Figure. For ECM connector terminal view, see Figure.
To check speedometer circuit, see appropriate INSTRUMENT PANELS article in ACCESSORIES & EQUIPMENT. For testing of systems or components, see SYSTEM & COMPONENT TESTING - 4-CYLINDER article. For removal and installation of components, see REMOVAL, OVERHAUL & INSTALLATION - 4-CYLINDER article.