Since there are thousands of 89661 variations, you should consult these specific databases:
What is the on your ECU case? (e.g., 89661-3A470) What engine model and chassis are you working with? toyota 89661 ecu pinout
Constant 12V from the battery (maintains ECU memory/codes). Since there are thousands of 89661 variations, you
This guide aims to be a central reference, covering how to read Toyota pinouts, detailing the functions of common connectors like the 16-pin, 22-pin, and 26-pin plugs, and providing specific examples for popular ECU models such as the 89661-4A250 , 89661-17320 , and 89661-53070 . covering how to read Toyota pinouts