Quote:
Originally Posted by gl500des
...I know how to reprogram a key when I have a working key, as I did this when I replaced the battery in the one fob.
I can't find anything on how to program a key without a working key.
EDIT- Checked fuses 20, 24 and 60 - all fine. Any others?
Thanks for any input,
Duncan.
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Did you check the rear fuses for any associated with central locking...like the tailgate or fuel filler flap door?
The remote keys have 3 features built into it: EWS, FZV, & DWA:
EWS is the immobilizing feature and is completely different thanthe other 2. It doesn't require the battery inside the key (to start the car) and communicates over a 125 KHz RF signal that goes from the EWS control module to the ring antenna (around the ignition) which then powers the coil & ews transponder in the key.
FZV/DWA (remote central locking & anti-theft alarm siren system) do require the battery inside the key and the key transmits a 315 MHz RF signal to the aerial in the vehicle...which then sends the data to the FZV amp...which then sends the data onto the GM which then sends the FZV info to central locking and the DWA info to the alarm siren system.
Now, as to programming keys...the FZV/DWA remote features shut down when there's an issue in the central locking system or some of the shared monitors (like door actuators) that it shares with DWA. If the the central locking button on the center console isn't working...then you need to find out why.
Programming keys doesn't matter if one doesn't have working FZV/DWA as long as it can fit the ignition and go to position 1 and the electronics come to life. In fact, you can take any working remote key from any e38/e39/e46/e53...and if your key only has EWS...you can program those keys to lock/unlock & arm/disarm your car...why/how?
When you insert a key into the ignition and turn it to position 1, then back off...you have initiated the GM to write a new rolling code table to a remote key...it doesn't matter what aformentioned BMW key you begin to program as long as it is on the same 315 MHz frequency as your car. If you have a remote key from Europe or other markets that are 433 MHz...then you cannot program those keys. Once the GM has been set in motion...just begin pressing the buttons as per the instructions...you don't have to program the key that was in the ignition if it doesn't have FZV/DWA capabilities...in fact, you could program any BMW remote key from any e38/e39/e46/e53 if the only key you have is a non remote key...as long as you can start the car with it...and the battery is charged in the remote keys you want to program.