RobertISaar Posted July 2, 2011 Report Share Posted July 2, 2011 i need someone to test the circuit resistance of the OBD2 knock sensors, i've READ that they're 100K ohm units, i need to confirm this though. Quote Link to comment Share on other sites More sharing options...
gpchris Posted July 3, 2011 Report Share Posted July 3, 2011 Yup it's showing up at 100K on mine. Quote Link to comment Share on other sites More sharing options...
RobertISaar Posted July 3, 2011 Author Report Share Posted July 3, 2011 appreciate it. confirms a few things for me, mostly that to use an OBD2 knock sensor with OBD1, you would need to install a ~4050ohm resistor in parallel to the knock sensor and it will act normally. in reverse, to use an OBD1 sensor in an OBD2 application, you would just need to install a ~96.1K ohm resistor in series with the sensor. those changes would allow a full sensitivity knock sensor in either application. Quote Link to comment Share on other sites More sharing options...
BXX Posted July 3, 2011 Report Share Posted July 3, 2011 appreciate it. confirms a few things for me, mostly that to use an OBD2 knock sensor with OBD1, you would need to install a ~4050ohm resistor in parallel to the knock sensor and it will act normally. in reverse, to use an OBD1 sensor in an OBD2 application, you would just need to install a ~96.1K ohm resistor in series with the sensor. those changes would allow a full sensitivity knock sensor in either application. Installing the proper knock sensor is easier than messing with resistors:lol: Quote Link to comment Share on other sites More sharing options...
RobertISaar Posted July 3, 2011 Author Report Share Posted July 3, 2011 true, and generally there is an equivalent sensor for both styles, but eventually i'm looking for info so it will be possible to string more than one knock sensor into the knock sensor channels of PCMs, regardless of OBD1/OBD2/etc. mainly, i wanted to confirm that the newer systems use 100K sensors. Quote Link to comment Share on other sites More sharing options...
gpchris Posted July 5, 2011 Report Share Posted July 5, 2011 Its interesting to know. I always assumed they were the same. Quote Link to comment Share on other sites More sharing options...
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