Omer.phone
25-03-2017, 02:30 PM
Hello
I have A4 B8 2009 2.0L s-line
I saw some topics on this problem.
My problem is that advanced key are not open the car when you put hand on handles (proximity sensor), and it doesn't turn on engine with start button.
In the computer diagnostic it show : short to ground
R200 antenna, did check with other antenna it shows same problem.
With multimeter i check if some line are really short to gnd, and no.
Did take 2 wires from 8K0907064AL connector and bypass the original connection wires to R200 antenna, again short to ground.
Did disconnect and disassembly the unit, clean with dry pcb cleaner, did check under microscope to find maybe some cold soldering or broken soldering, try to search some bad or fried component. Not find..
Connected all together back to start and reset errors, and again... Not working
I try also to take my key and put it near the R200 antenna then with my plastic key try to turn on the engine, not success.
When i press the start button, on screen it say: " advanced key defective! Use injetion lock"
In this case what do you suggest to do?
What do i need to check?
Is there some bad mosfet on the board that need to replace?if some, can you show me witch?
Thanks advanced! ☺️
I have A4 B8 2009 2.0L s-line
I saw some topics on this problem.
My problem is that advanced key are not open the car when you put hand on handles (proximity sensor), and it doesn't turn on engine with start button.
In the computer diagnostic it show : short to ground
R200 antenna, did check with other antenna it shows same problem.
With multimeter i check if some line are really short to gnd, and no.
Did take 2 wires from 8K0907064AL connector and bypass the original connection wires to R200 antenna, again short to ground.
Did disconnect and disassembly the unit, clean with dry pcb cleaner, did check under microscope to find maybe some cold soldering or broken soldering, try to search some bad or fried component. Not find..
Connected all together back to start and reset errors, and again... Not working
I try also to take my key and put it near the R200 antenna then with my plastic key try to turn on the engine, not success.
When i press the start button, on screen it say: " advanced key defective! Use injetion lock"
In this case what do you suggest to do?
What do i need to check?
Is there some bad mosfet on the board that need to replace?if some, can you show me witch?
Thanks advanced! ☺️