Hi. I have trouble starting my audi a4. It cranks, but doesnt start. fuel system has been checked and rails get fuel. I also checked the throttle body and accelerator pedal sensor. Both with actuation test / data stream with diagnostic tool are working, but while cranking the throttle flap doesnt move while pressing the gas pedal.

Might it be the immobilizer system? 

2 hours ago, Paavo said:

Hi. I have trouble starting my audi a4. It cranks, but doesnt start. fuel system has been checked and rails get fuel. I also checked the throttle body and accelerator pedal sensor. Both with actuation test / data stream with diagnostic tool are working, but while cranking the throttle flap doesnt move while pressing the gas pedal.

Might it be the immobilizer system? 

Hi the throttle butterfly wont move until the engine is running as its a fly by wire set up, might be the immobiliser or the crank position sensor, got any codes. 

Steve.

Hi. If the crank sensor is off, it shouldnt show rpm? It shows.

If it is the immo then how to handle this issue?

Paavo

I am now pretty sure that issue is caused by immo. I will have audi expert come take a look next week.