Engine Control Module
WARNING: This page is about a different car, the 2003 Toyota RAV4, 2002 Toyota RAV4, 2002 Toyota Highlander, 2001 Toyota RAV4, and 2001 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.
ECM receives information from various input devices and uses this information to control shift solenoids and torque converter clutch lock-up. ECM contains a self-diagnostic system which will store a Diagnostic Trouble Code (DTC) if a failure or problem exists in the electronic control system.
DTCs can be retrieved to determine transaxle problem area. On RAV4, the ECM is located in the right side of the instrument panel, and on Highlander the ECM is located behind glove box in instrument panel. See Fig 1 and Fig 2 .