I'm going slightly mad here... I've been working with a Toyota 5FBE15 for a couple of days now, without finding any error, though the error code EE are still there.
The machine are operating properly, but with the error code EE. " MCS receiving data abnormality".

Estimated causes from the original repair manual:
1. Multi-display defect
2. Disconnection in wiring between CN105 and multi-display
3. CN 105, CN 1, or CN 120 contact defect
4. CPU board defect

I've changed the multi-display (complete), checked alle the contacts involved in the estimated causes plus many more, checked the wiring between the CN 105 from CPU board and CN 120 on the multi-display and finally changed the CPU board with a brand new one. ( This machine have MOS-FET system).

The error code are still there anyway, so my question are; Can someone come up with an idea or post a comment if someone of you have experienced this before.

Thank you!