might help if you added a key as to which letter was which color...if blue is B, I think blue is the heater element (with the square wave lookin thingie). the alternating short-long lines means a voltage source and the arrow means variable thus that's the sensor. you need to put the EFIE on whatever P/W, T/W, T, and P wires are.
on a related note, don't you need a EFIE for EACH O2 sensor?
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-Russell
1991 Toyota Pickup 22R-E 2.4 I4/5 speed
1990 Toyota Cressida 7M-GE 3.0 I6/5-speed manual
mechanic, carpenter, stagehand, rigger, and know-it-all smartass
"You don't get to judge me for how I fix what you break"
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