Quote:
Originally Posted by zonefive
My E53 recently was having progressively worsening issues receiving the signals from my keyfobs. I had to get closer and closer to the vehicle to get the doors locked/unlocked. Finally, it stopped working altogether.
I tried re-initializing the key and it doesn't respond. I have two other keys and neither of them work either.
- The button for central locking works fine.
- The manual unlock works fine and
- the keys start the car no problem.
…the symptoms I've described, it is most likely the receiver that receives the signals from the fob or the wiring harness that goes to it. I have been unable to find where those things are so I can check them myself or direct my mechanic to check them. |
The 3 things numbered in your quote…communicates differently with its control module (the GM for #1 and #2 over the P-Bus). The third feature communicates over a totally different radio frequency and with different components (ews/DME/Ring Antennay/Transponder inside remote key…over a 125KHz radio frequency)
Remote Central locking (
FZV) communicates over the K-Bus to the GM and the signal is sent over a 315 MHz radio frequency in the US market…to the aerial located in the rear left cargo window…which is connected to the FZV receiver in the rear tailgate spoiler.
Again…on the Tourings (wagons) and SUV/SAVs…the FZV antenna is embedded in the rear left cargo window: