I have a 2007 RX 350 and after a lot of pain and agony, found that the blue wire going to the B1S1 a/f sensor was broken about 8 inches from the connector. I figured it would be easy enough to splice it back together, but putting a meter on the end going back into the harness, I get nothing. I was thinking since the code it was throwing had to do with the heater, there would be a 12V on it. Can someone tell me what this blue wire's function is and where the other end is so I can check the continuity? Thanks for your help!
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