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(4) wire O2 sensor
Posted: Tue Feb 05, 2013 8:28 pm
by 8803
I am using a (4) wire O2 sensor. The sense and ground are shielded (White and Black) and the heater has its own power and ground. Which pin on the DB37 connector should I ground the Black shielded wire to?
Thanks for any help.
Re: (4) wire O2 sensor
Posted: Wed Feb 06, 2013 12:15 am
by kjones6039
The sensor ground (black) needs to be grounded at one of the sensor returns of the db37. The heater ground should go to the engine (block, head, intake).
Ken
Re: (4) wire O2 sensor
Posted: Wed Feb 06, 2013 7:22 am
by 8803
kjones6039 wrote:The sensor ground (black) needs to be grounded at one of the sensor returns of the db37. The heater ground should go to the engine (block, head, intake).
Ken
Ken; thanks for the help. I have more questions now. The wiring diagrams show pin 19 as a sensor ground for the (2) temperature sensors and the throttle position sensor. This will now be a 4th wire to solder to a 20 gauge pin.
1 How do you physically run the wires?
2 Should I run a 20awg wire from DB37 to a remote isolated posted and than single wires to the various sensors?
3 Also, where do I jumper the shield mesh to ground?
I just found this
http://www.DIYAutoTune.com/tech_articles/grounds.html so I maybe have my questions answered.