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For anyone going through my thread and looking to figure out how to wire these things:
Secondary O2 sensor
Insight:
Black (on sensor) to White/red -> ECU C31 SHO2S
Gry (on sensor) to grn/blk -> ECU C18 SG2 (ground)
Wht (on sensor) to blk/wht -> ECU C12 SO2SHTC
Wht (on sensor) to blk/yel -> ground?
RSX
E2 - wht/red - SHO2S - detects HO2S signal - 0.6v warm
E4 - pnk - SG3 - sensor ground
E6 - blk/wht - SO2SHTC - drives secondary H2OS heater (ground?)
Other wire - IG1 12v+ when car is on, powers H2OS heater
Identifying the O2 sensor heater wires is done by finding the two wires which have 3-4 ohm resistance between them. The other two wires are signal wires. None of them are polar.
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Coolant sensor
ECT B15 - MTRTW - RED/GRN - should be fed 5v with low pulses, ground will make it show 2 bars, solid 5v will make it show "overheating" 14 bars.
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