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Toymods Board Member
I supported Toymods
Location:
Turramurra, Sydney.
Registered:
May 2002
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4 wire O2 sensor; what wire's what?
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Thu, 21 November 2002 04:07
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I picked up a Toyota 4 wire (heated) O2 sensor today, as my mount is way too far from the head for a single wire sensor to work. Anyway, I was wondering if anyone could tell me which wire is which?
There is 1 white, 1 blue & 2 black.
I assume the 2 blacks would be earts (but why 2?), the white the 12V for the heating element and the blue for the signal to the ECU. Am I close?
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