Hello, these measurements are very rare all ECUS work with sources of 5 volts for both them and for signal processing, this is because they are constituted by CMOS circuits in the most. In these three lines of the sensor, 5 volts, 0 volts or dough and the return signal that must be measured with the sensor connected to preference with an oscilloscope and apply empty to the sensor should be seen in any case and see how the signal changes. If you perform the measurement with the sensor disconnected in the signal line will see 5 volts because that line within the ECU is linked to a voltage divisor that the ECU uses precisely to diagnose the sensor. Through this voltage divisor the ECU puts 5 volts to that line. You may not understand what I am talking about but that is the normal form of operation of all the ecus that I know. At least I don't know any MAP who works with 12 volts if someone knows him that corrects me, maf sensor "yes" but map no, and that car has only Map. I recommend that you talk to your mechanic and check the multimeter scale if it is measuring with it, to reconfir those measurements but those readings are not well. If those measurements are correct within the ECU there must be any safe damage. I am attentive to your comments greetings.
Mechanics manuals
all about mechanics and technological news.
