Toyota 89661 Ecu Pinout [top]
This is a technical request regarding the Toyota 89661 series ECU (Engine Control Unit). The number 89661 is Toyota’s part number prefix for engine ECUs, but it is not a single pinout. It covers hundreds of different models (Camry, Corolla, Land Cruiser, Lexus, etc.) across OBD-I, OBD-II, JDM, and USDM variants.
- Find permanent 12V (pin to chassis ground – key off)
- Find switched 12V (key on)
- Find ground pins (0 ohms to battery negative)
- Then probe sensors (TPS, ECT) for 5V reference.
3. Generic Pinout Reference (Most Common Configuration)
For a 2000-2005 Toyota 1ZZ-FE / 2AZ-FE engine (Corolla, Camry, RAV4). Use only as a starting point—verify every pin. toyota 89661 ecu pinout