DCC GE70 will not accept throttle control (N scale, Spectrum model)

[beljath]

This engine starts running full speed as soon as my NCE system boots up.  I have tried a reset by writing 8 to CV 8 and only get a CAN NOT READ message. However, I was able to change CV 29 from 6 to 34.  CV 55 I also tried changing from 255 to 55. Niether of these seemed to help.  The MFG number comes back as 101 with a version 046.  CV 2 is set at 10.  I got this as a used engine in a swap fro some old HO gear and would like to fix it if I can. Any suggestions?  Programing the loco to a number other than 3 did not make a difference either.  It seems that maybe the decoder install was faulty and the motor is still connected to the wheel pick ups.  Using a DC power pack does provide speed control, stop and reverse.   Thanks  Tom

[Hunt]

The decoder is damaged. Replace it.



An aside –
The Bachmann version 46 decoder does not support CV 55.

[plas man]

same happened to mine - shop new out of the box , Bachmann UK fitted a new decoder . under warranty .