GM MDI2 (Hardware is same as BOSCH MTS6531) repair

[Kaluluka]

Hi!
I have two Partially working GM MDI2 (BOSCH MTS6531 hardware) on bench.
Does anyne comme across these and maybe have some repair information?
I'm awaiting fo microscope to arrive, to do the repair.
On both units, there are some critical voltages missing: whats misssíng on one unit, is available on other one and vice-versa.
Regards,