[softic]

the voltage on 'ground' reference point is 0.00V when off and 0.01V when switched on.
the impedance is 0.0 Ohm when off.

sorry for using wrong term: by (-) accumulator I mentioned (-) on car's battery which is linked to chassis on my car.
what are next steps? I see lots of diagnostic points on the mainboard - should I check them?

also I have checked again the information from fuel injectors (I have direct injection car) - it is correct and there are no problems here.
the same about information from flow sensor and trunk harness...