Back to everyone's favorite topic; o2 sensors. After searching for days and no avail I assumed a post was justified. Here's the problem, I bought/took over someones e30 m3 swap project, Ive got just about everything finished properly and it is coming out of paint next week; the last issue is the 02 sensor. I have the bung in on my recent custom fab exhuast ready and an 02 for the obdi 95 m3 (applicable to the bosch 413 ecu which i am using). Anyways, the sensor has the 4 point connection but I am uncertain where to connect it as I did not start this wiring (its a good wiring job though, zionesville). The only connector I can locate is a male 4 pin but it is a screw in larger diameter similar to that of the MAF sensor connection; which will not connect to my female 4 pin o2 sensor. I no longer have my conversion CDs and need to locate a wiring diagram of the bosch 413 ecu or figure out which wires are for the precat o2 and which run to the fuse box. Any suggestions?
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The 413 is only designed to use 1 O2 sensor. It connects to the ECU at pins 40 (Ground, black wire) and 13 (signal, yellow wire) and is powered through the green wire from the O2 sensor relay and the brown wire is the heater ground. -
Excellent, yeah I was aware of which wires did what I just was uncertain as to whether or not those wires maintained the same color directly to the ecu, as I would prefer to correctly rewire than guess, assuming the easier option doesnt yield immediate results. Thanks for the input, its appreciated
-HunterComment
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Yep, it's the same wire all the way from the O2 connector to the ECU, or should be.Comment
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