Anyone ever thought of this? Maybe it's wired up for it already?


http://service.gm.com/gmtechlink/images/issues/cnt_mo/images/6x6/fig5.jpg


http://service.gm.com/gmtechlink/images/issues/cnt_mo/images/6x6/fig6.jpg


The Cadillac XLR keyless access system does not use a traditional key for door locks or ignition. Instead, the driver carries a transmitter fob (fig. 5). When the vehicle senses the presence of the correctly coded transmitter fob, the doors can be opened. With the transmitter fob inside the passenger compartment, the engine can be started by pressing the START button on the instrument panel (fig. 6).

Key On, Engine Off Mode
There may be times, such as when you are performing diagnostics on the vehicle, that you need to have the ignition turned on, with the engine not running. In this mode, all modules are powered up and communicating on the serial data line.

TIP: This information is covered in SI. Follow this path: Accessories > Keyless Entry > Description and Operation > Keyless Entry System Description and Operation
- Make sure the transmitter fob is inside the passenger compartment.
- Depress the brake pedal.
- Be sure the transmission is in Park or Neutral.
- Press the ACC button and hold for 5 seconds. The instrument panel will light up and the ignition will be turned on, but the engine will not start.

TIP: If you press the ACC button only briefly, the accessory mode will be turned on. This is not the same as turning the ignition on.

It is imperative that you press ACC again to turn the ignition off.

TIP: Retained Accessory Power will function for 10 minutes after the ignition is turned off, or until a door is opened.

It's a neat idea. Not sure what will happen when the batteries die. http://www.dieselplace.com/forum/smileys/Disapprove.gif It might use a transponder that doesn't require batteries. Similar to Passkey III or Ford's PATS system.


I am surprised that it doesn't lock and unlock automatically as you approach the car. Instead of having to push buttons. Seems that would be the next logical step.

Mercedes has offered "keyless-go" as an option on some models since 2000. The MBZ version is a credit card that you put in your wallet. The credit card will activate when you are nearby the vehicle to unlock the doors. When you're in the vehicle w/ the credit card, you can press the engine start button.


The link below is a tech article about the MBZ version.


http://www.sae.org/automag/electronics/08-2003/1-111-8-46.pdfEdited by: mbeckwith

The 2004 Toyota Prius hybrid has a similar system, but if the battery dies...
Don`t worry, you get a regular key inside the fob also.