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Need help with EDC7UC31 on New Holland T5 155
06-10-2023, 00:22 AM,
Post: #1
Need help with EDC7UC31 on New Holland T5 155
Good day.

Have a situation with an EDC7UC31 from a New Holland T6 155 from 2014.
Owner claims that tractor started started stalling and sometimes it would accelerate abnormal, loose acceleration. On display panel codes 14901 from CNH EST under ADIC module(No control model found) and under ECM module 3157 same on panel which no can communication.

I read these are common to happen on these EDC7UC31.

Strange is that wiggling or just tapping with hand the ECM case, the tractor starts and works ok for a few mins, then either stalls, looses acceleration, acceleration irradic.

Brought EDC7UC31 into shop to try get reads on bench with both DFox and Ktag original using the capacitors for DFox and GPT ED7 cable for Ktag.

Was able to get reads, and all seems well.
Took it back to tractor and tractor won't start.
Brought EDC7UC31 back, and now no bench reading possible.

Openned the EDC7UC31 like old time very carefully to access bdm and try reads, and same info on software that unknown ECU.

Tried to read 95640 eep without removing from board using soic8 clip, and all 0000 on read with chip programmer, tried to load the 1st eep read I had got with DFox a tried to write, but giving me always failed writtng at the end. Removed 95640 from board and read direct on programmer and gives me a totally different read similar to the DFox eep read, so I tried to write the eep on the programmer and it wrote successfully. Compaired both loaded eep dump with DFox eep dump and what on eep after writing and both same.

Solder back the eep on board same position, try to DFox and Ktag bench and bdm read and unknown ECU comes up again.
Is the EDC7UC31 sort of blocked.
Has anyone had such situation and solved it?
If anyone knows trick around this, kindly advise, otherwise have to send EDC7UC31 to ECU repair service, and if only solution for this ECU as many on other forums claim same tractor issues and ECU has to be repaired, kindly advise if a reputable EDC7UC31 repair service.

BRs.
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