garyneedsz Posted November 5, 2010 Share Posted November 5, 2010 just bought a new CHTS. the wires itself, that go to the ECU have no resistance. Now the 81 manual, from Xenon, says to disconnect the 16-pin connector. test resistance between pin 23 and ground. im not getting any reading. i dont understand how the pin should have continuity w/ ground. any suggestions? comments? thanks Quote Link to comment Share on other sites More sharing options...
mario_82_ZXT Posted November 5, 2010 Share Posted November 5, 2010 Screw the sensor in. Measure the resistance at the sensor with your multimeter. Then plug the harness in and measure resistance between pin 23 and ground. The stock sensor has one pin the goes to ground and the other to the ecu. If the value of the second test is way different then the first (as in higher) then you have a corroded/bad connection somewhere. If it has no resistance you have a short somewhere. Quote Link to comment Share on other sites More sharing options...
garyneedsz Posted November 7, 2010 Author Share Posted November 7, 2010 is pin 23 the yellow/grn? Quote Link to comment Share on other sites More sharing options...
garyneedsz Posted November 8, 2010 Author Share Posted November 8, 2010 im looking at the wiring diagrams. the yellow/green. is pin 23. it goes directly to ecu. the other wire on the CHTS harness T's with the AFM and then goes to the ecu. i cant understand how it would be getting ground?. im testing pin 23 and ground, and get no reading. Quote Link to comment Share on other sites More sharing options...
garyneedsz Posted November 8, 2010 Author Share Posted November 8, 2010 i dont think i have a short anywhere, i followed pin 23 all the way to the ecu. the "other wire just connects with afm, and goes to ecu. im lost. Quote Link to comment Share on other sites More sharing options...
garyneedsz Posted November 9, 2010 Author Share Posted November 9, 2010 ok, FSM from xenon tells you to disconnect the connector and test. When i test it with the connector plugged in, i get a reading, which seemed to be in spec. Am I doing it wrong if i leave the connector plugged in? Quote Link to comment Share on other sites More sharing options...
KnightoftheRound Posted December 9, 2010 Share Posted December 9, 2010 The way the manual from Xenon puts it, makes no damned sense and seems to confuse a lot of people (At least, I have read this same issue before with that test). It would be like if you took a wire, stuck one pin on the multimeter to one end of the wire, and the other pin to a ground to get a resistance, which you can't Leave it plugged in, or test it at the sensor. Quote Link to comment Share on other sites More sharing options...
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