Is 4.3 V enough to power abs sensors?

[Kid Rock]

Ripped apart all the wire loom from wabco ecu to sensors following volvo's wire diagram. Found the right wires for RR rear axle and have found no real issue with the wires... fixed what little i did see... testing the leads to the sensor now and they all read a flat 4.3 v...

Is 4.3 volts acceptable or is there actually a low voltage problem and not a short?

Update: just checked power supply to ecu, it was 12v --- power coming out is 4.3

Wabco frame mounted ecu pn# 44610607
Thanks in advance

Mid 136 sdi 4 fmi 4

RR sensor Short to ground or low voltage -