OK. I was checking out www.hybridgarage.com. They have the pinout for OBD1 P72. It shows that I was correct with the W/Y wire at D17. If you can find this, that is where the signal wire needs to be cut with the sensor side of the wire connected to the white wire on the blue box using a male connector and the ECU side of the wire needs to be connected to the green wire on the blue box using a female connector. I don't know if this will solve your problem but that is all I can do for you at this point. Good luck. I'm going to bed.