Hi friends. I need some help. I have a problem with a common ME7.5 ECU that simple does not allow to write 95040 eeprom under boot mode. I have used ME7_95040 tool during many many times with great sucess but right know I found a dumb ECU that have really rare issues. This is the situation:
- Repaired ME7.5 06A906032HP 0261207441 ECU with supposed main C167 processor changed.
- K-Line communication through diagnostic port is not working at all.
- ECU is working in car with some sporadic weird behavior.
- Using boot mode read/write 29F800 flash eeprom is 100% working
- Using boot mode 95040 eeprom read is working with ME95040 tool, but write not at all.
Then what can cause the k-line communication issues, a software/firmware problem? can 95040 write be disable in ECU board or by C167 MPC firmware? can W pin of 95040 be grounded in board to avoid writing it?
95040 tool report is attached and some advice and ideas are welcome. Thanks for your help in advance friends.

I don´t have an understandable answer. I only receive the information that car had a throttle body issue. That sounds weird to me. Anyway first to isolate issue I will like to know your experiences, do you think this kind of issues is more related to software instead of hardware?

Finally I change 95040 data desoldering it. I use a flash-serial eeprom dumps that was checked and confirmed working properly and finally I can communicate and do diagnosis with ECU. To your knowledge that dump that avoid 95040 write by boot mode and avoid K-Line diagnosis, is attached here.

No seems to me that it is the original chip.

Everything else looks ok. Now I can read and write 95040 using boot mode. But on bench ECU have a weird fault reading behaviour. If you read DTC just after turns on B+ and Ignition, I found almost 10+ common errors. But if you clean errors I only get two (2) and repeat the same again. No other ME7.5 ECU was doing that. All always checks and shows many related DTCs. I was thinking about a different C167 MPC firmware issue, could be?

A last comment sorry to post this kind of comment here (hardware problem). I know that is a large thread with a different topic. Then If anyone is interested I can publish a new thread related to that issue.

Which port is showing in device manager?

That isn't the com port.

I fixed the comport issue and am able to read 95040 on non immo me7.1. I tried to read it on a spare 8E0 909 518 AK ME7.5 with immo but am unable to connect. I get "Initializing communication ... FAIL. (error=0x07)". I'm using a home made bench harness with power to ecu pin 3,21,62 and obd pin 16 ground on ecu 1 and 2 obd pin 4,5 and ecu pin 43 to obd pin 7. I thought I read online somewhere that some ecu with immo need a wire on the second plug  but I can't find it now. Could that be my issue or am I missing something else. Thanks for any suggestions.