Hi all, this is my first post and typically I assume like most looking for some input/guidance with a problem!!
We have a 2.0L Octavia Diesel (BKD) in with a non start issue, diagnostic equipment not reading crank signal.
When we've scoped the reference voltage and signal from the sensor, we seem to be loosing the signal voltage when the sensor is "on load" (forgive me if the terminology is a tad pants), as per the attached. We do also have a poor ground (or negative) to the sensor, but we have grounded this but still get the same trace.
In addition the reference voltage for the cam sensor is non existent when connected, i.e. we have 5V prior to connecting but nothing when connected.
Could I be so bold to ask for your thoughts please.
Short to ground on 5v reference voltage which goes to cam sensor. Start pulling the connectors for all sensors and actuators until your connected cam has 5V. Or maybe that cam sensor is shot.
Thanks for the reply, diagram attached.
It would make sense that the cam sensor is shorted to ground, but even with it disconnected and with the 5v reference then present the signal on the crank remains the same?
Hi,
what year is the car? on these cars when cam sensor dies it still starts but logs a fault code for it and it takes a longer cranking time . common problem on 2.0 for not starting is shorted injector. it shorts to ground. it is rare on BKD engines but worth checking because those are the symptoms.
DIESEL_DOCTOR wrote:Thanks for the reply, diagram attached.
It would make sense that the cam sensor is shorted to ground, but even with it disconnected and with the 5v reference then present the signal on the crank remains the same?
Drawing is very hard to read, but from what I can tell, there is no way to know to which component the reference voltage goes. Follow the advice above me, cause I am not really into VW group.