986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - Do 97-99's have OBDII wires for sensors?

JFP in PA · 07-17-2017, 01:03 PM

Mike, the OBDII system in these cars reads off the DME, not the sensors directly. The sensor are sending fractional or low voltage signals to the DME, which converts them into what are referred to as "PID's", which are the reading values. Tapping into the sensor wiring will only give you the voltage. You can read a significant number of the PID values directly off the OBDII port however.

07-17-2017, 01:03 PM	#2
JFP in PA Registered User Join Date: Feb 2005 Location: It's a kind of magic..... Posts: 6,458	Mike, the OBDII system in these cars reads off the DME, not the sensors directly. The sensor are sending fractional or low voltage signals to the DME, which converts them into what are referred to as "PID's", which are the reading values. Tapping into the sensor wiring will only give you the voltage. You can read a significant number of the PID values directly off the OBDII port however. __________________ “Anything really new is invented only in one’s youth. Later, one becomes more experienced, more famous – and more stupid.” - Albert Einstein