NDD signals diagnosis on a LSM-510 NLO

[[Ch...]]

Hello everyone, from a newcomer on this forum.

I guess I am in the right forum section, as my need relates more to a hardware than to software (for the moment ?)
I checked (hopefully carefully) that my question has not been already discussed.

I have to diagnose the I/Os of 2 NDD modules of a LSM-510 NLO and I would like to check if my signals correspond to the right ones.

=> I have a documentation on the « SCA-control-board », which is embedded in the Electronic Control Unit (ECU) I guess, but the I/Os I can see from this documentation do not seem to correspond to the I/Os I see on the NDD modules (number of pins, supplementary sub-bus linked to the filter module, etc).
=> Plus, the ECU is not that accessible in order to open it and to make measurements directly on the board.

Thus I think that making measurements directly on the I/Os of the front panel of the ECU will be far safer for the system, but I can not find documentation on it. Would there be some documentation available on these signals, maybe a documentation of the ECU ?

With best regards,

Charles-Henri Hage