Toyota 89661 Ecu Pinout Jun 2026

This older unit often has pin labels printed directly on the circuit board inside the casing. 89661-13038 (7A-FE Engine) Features a three-connector setup: 26-pin (A) 16-pin (B) 12-pin (C) 89661-50241 (Lexus/Celsior 1UZ-FE): Uses a four-connector layout with 34, 22, 16, and 28-pin Modern Units (2015+): Typically follow a more standardized wiring scheme where: Ground (E1): Often found at pin 81 of the largest connector. Constant Power (BATT): Usually pin 1 or 20. Switched Power (IGSW): Commonly pin 4 or 28. CAN Communication: Pins for CANH and CANL are used for vehicle networking. How to Identify Your Specific Pinout Check the Casing:

The ECU usually has three connectors (often labeled E11, E12, E13 or simply arranged as rows). toyota 89661 ecu pinout

The prefix refers to the core part number for Toyota’s Engine Control Units (ECUs) across decades of models. Because this number is shared by everything from a 1990s Corolla to a modern Hilux, there is no single universal "89661 pinout." This older unit often has pin labels printed

This is common on water-damaged 89661 units (especially in RAV4s and Corollas). Switched Power (IGSW): Commonly pin 4 or 28