by "its"???? (and it should be "it's" !!!) Anyway, it (the chip) cannot measure its own current, only the current flowing through the (red jacket) wire.

The C1 cap shown is simply a decoupling element used to remove line effects from the power going into the CSA_V1 chip.

__________________
Regards . . . . JimF
-------------------
'94 S500 Cpe

Visit my Mercedes Web Page