Looking for a wiring diagram for the Hitachi EWR20-022 ECU, for use with Piasini Serial Suite

Hello,

I have a Renault Vel Satis with a 3.5L V6 petrol engine (240 hp) and an Hitachi EWR20-022 engine control unit (ECU).

I am using the Piasini Serial Suite 4.3 software, but I cannot find this specific unit reference or the connection procedure required to read data from the ECU.

Does anyone happen to have the wiring diagram or documentation for this Hitachi ECU, so that I can perform a backup read?

Thank you.
________