Originally Posted by ShaunC
Got a bit of a problem. Need to get my car back to the orignal ecu.
1) So, anybody know the wiring for the injector connection (image_(201).jpg). The side from ecu to there is intact. But the other side of the connection was cut off. Can figure it out, but if any body know's, then it will save some time.
2) Do universal Lamda sensors work on the Q4? Q4 uses a three wires, earth & 2 signals. Universal has four wires 2xSignal, 2Xheater?
Again I have the origanal connection block, ecu side but nothing else.
3)Where does the tube come from, that plugs into the Absolute Pressure Switch. Have the switch, but no idea what plugs into it? I take it, it comes from the head?
1) Check cable colors, should be the same on each side of the conector. Anyway, Iīll look on a .pdf I have that should show that.
2) 3 wires are: signal, 12+ (heater) and a common ground.
4 wires: 2 for the heater (whites), black for signal, and grey for ground.
In the picture, the conector with 2 pins, is the one for the heater, one of them itīs going to be 12+ and the other 0V. Conect them to the withe ones. The other takes the signal to the ECU, you have to connect the black one there. And the grey just attach it to any metalic part, but be sure itīs 0V with the ground.
3)The pressure switch has to be conected to the admision manifold, just put a hose between them. But what you are showing in the picture is the MAP. Anyway, itīs must be conected to the admision manifold too.
BTW, what happened with that car??