Toyota 89661 Ecu Pinout __exclusive__ Jun 2026

Searching for the engine code (e.g., "1ZZ-FE pinout") alongside the 89661 number often yields better results than the part number alone. Could you provide the full 10-digit part number engine and year of your Toyota so I can find the exact wiring diagram?

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

Constant 12V from the battery (maintains ECU memory/codes). toyota 89661 ecu pinout

Categorize each pin as either a Power Feed (+B, BATT), Ground (E1, E2), Sensor Input (TPS, MAF), or Output Control (Injectors, Igniters). Resources for Full Diagrams Toyota ECU Pinout Guide 2015+ | PDF - Scribd

: Because "89661" covers diverse engines, you must look for diagrams based on the engine family. Comprehensive collections for engines like the , , and can be found on platforms like Pinterest . Searching for the engine code (e

: Forums like 2nd Gen 4Runner Mafia frequently host diagrams for units such as 89661-35570 . 🛠️ Common Critical Terminals

| Pin | Function | Wire Color (typical) | |-----|----------|----------------------| | A1 | Injector #1 | Red or Light Green | | A2 | Injector #2 | Yellow or Light Green | | A3 | Injector #3 | Blue or Light Green | | A4 | Injector #4 | White or Light Green | | A5 | Ignition coil #1 | Black/Red | | A6 | Ignition coil #2 | Black/Red | | A7 | Ignition coil #3 | Black/Red | | A8 | Ignition coil #4 | Black/Red | | A9 | EGR vacuum solenoid | Red/White | | A10 | Fuel pump relay control | Blue/Red or Green/Red | | A11 | Main relay control | Yellow/Black | | A12 | +12V battery backup (constant) | White/Red | | A13 | Ground (ECU power) | Brown/White | | A14 | Ground (ECU power) | Brown/White | | A15 | +12V from main relay (switched) | Black/Yellow | | A16 | +12V from main relay (switched) | Black/Yellow | | A17 | O2 heater (front) | Black/White | | A18 | O2 heater (rear) | Black/White | | A19 | Idle air control (IAC) – open | Red/White | | A20 | Idle air control (IAC) – close | Red/Black | | A21 | VVT solenoid (if equipped) | Yellow/Black | | A22 | Cooling fan relay | Green/Black | Constant 12V from the battery (maintains ECU memory/codes)

If you are using a pinout to solve a "No Start" condition, check these three pins in order: