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Author: Subject: 4 wire lambda sensor
thepest

posted on 12/1/10 at 02:32 PM Reply With Quote
4 wire lambda sensor

I got one from a scrappy, 2 white 1 black and 1 grey... how do I wire it up?
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rusty nuts

posted on 12/1/10 at 02:41 PM Reply With Quote
2 white are for the heating circuit
grey is earth
black is signal

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thepest

posted on 12/1/10 at 02:59 PM Reply With Quote
do both white have to be +12v then?
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matt_claydon

posted on 12/1/10 at 03:05 PM Reply With Quote
No, one to earth, one to +12v.
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stevebubs

posted on 12/1/10 at 04:13 PM Reply With Quote
Useful Lambda Wiring Info
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thepest

posted on 12/1/10 at 05:46 PM Reply With Quote
so its basically 2 circuits, one for the heater and the other for the signal right? hence can I earth one white to the grey? IE same earthing point on the chassis?

also black goes to (as in my case) Megasquirt right?

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thepest

posted on 12/1/10 at 05:58 PM Reply With Quote
This answers my own question:
Link in PDF

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