This is my first post here, mostly because this is my first Audi problem that I have not been able to cure for probably 20 years.
I did search for this problem but I couldn't see any that refers to "cam sensor low voltage", if this has been covered then please guide me to the link.
The car is a 2008 A4 2.0 tdi S line. 85,000 miles.
The car is difficult to start (almost impossible) unless it is hot then it'll start right away as it should.
We did a diagnostic and it shows low voltage to cam sensor, I checked the plug going to the cam sensor lead, this is marked (1) (2) (3).
From reading I found the number 1 pin should be 12volts reduced to 5 - 7 volts when running.
Number 2 pin is the sensor wire, again this should be 12 volts and between 5 - 7 volts when running.
Number 3 pin is Earth.
Firstly I would like to know if this is correct as it is kinda important to know.
I have between 2 and 3 volts to wires 1 and 2.
This is my question.
Where do these wires connect to ? if it is the main ECU then it is probably that the ECU is faulty ?
Is this a normal / common issue with these cars or is it rare ? if it is common then please tell me the cure.
I have a ECU guy that can check and repair, but he is a bit spiteful, so I dont want to just give him the ECU unless it is likely that the ECU is faulty.
Please help if you can as the car is now off the road.