Focus on the (1GR, 2UZ, 1ZZ) instead of just the ECU number.
Using a Digital Multimeter (DMM):
Installing a 89661-0D150 (Camry) into a 89661-48B10 (Corolla) will not work. The immobilizer, CAN bus addressing, and pin assignments are different. You will likely blow a fuse or fry the ECU. toyota 89661 ecu pinout
| Source | Method | |--------|--------| | | Paid, but official. Pinouts are in EWD (Electrical Wiring Diagram). | | AutoZone Repair Guides | Free for many 1990s–2010s Toyota models. Search by vehicle, not ECU number. | | ProDemand / Mitchell1 | Library access may be free via some public libraries. | | Toyota Nation / Corolla/Camry Forums | Users post specific pinouts (e.g., “89661-33190 pinout”). | | ECM Pinout PDF repositories (Google Drive, Scribd) | Search: 89661-XXXXX ECU pinout PDF | Focus on the (1GR, 2UZ, 1ZZ) instead of just the ECU number