Toyota 89661 Ecu Pinout !!top!! -
89661
Finding a specific pinout for a Toyota ECU with the part number can be challenging because that number is actually the prefix for hundreds of different Toyota Engine Control Units (ECUs).
- Replace ECU if internal electronics (MCU, power MOSFET bank, regulator) are faulty and beyond practical repair.
- Consider repair if failures are connector corrosion, broken solder joints, or replaceable components (MOSFETs, diodes, regulator ICs) and you have MCU board‑level experience.
- For replacement, match exact part number, software calibration (if required), and immobilizer pairing needs.
Tools Needed
Common 89661 connector pin assignments (typical mapping)
Using a Digital Multimeter (DMM):
full 10-digit part number
What is the on your ECU's label so I can help you find the exact diagram? toyota 89661 ecu pinout