My '96 T5 is giving me a 522 (rear heated o2 sensor) and 153 (no 02 signal) error code. I've just put a new sensor in! I have power to the sensor (one white wire) so I need to check the other white wire. It is supposed to connect to the ECU at pin 29 but I don't know which pin that is when I look down into the box. Can anyone give me a picture or a diagram telling me which of the pins it is? Argg.
The new sensor is generating a proper signal when heated on the bench. The trick is getting it heated while in the car I think.
Thanks