Chrysler Crossfire
Anti theft alarm

This is one information page of my collection of what I have repaired on my Crossfire.

Note:
You should not do any repair on your car if you don't have enough experience and knowledge! You use this information at your own risk! Don't blame me if something goes wrong.

Content:

• Main Content Chrysler Crossfire DIY
  1. Anti theft alarm

If you have a Mercedes SLK R170 with a 320 engine and not AMG version it's almost exact the same.

Note:
You have to work with the electric parts. Disconnect the battery, the negative terminal ! When disconnecting the battery the alarm and radio will be reset, be sure to have any codes that's needed!

1, Anti theft alarm:

All modern cars have some kind of alarm system. You have to know how they works, if your car battery goes down the alarm will be reset and you have to set it up once again.

But how?

My plan today was to do some work on my car, but ...

Welcome to Sweden!

This winter I took the car battery indoors and let the battery be on maintenance charge. However when the car is without the battery all electronic devices will be reset, included the car alarm, so the fob keys must be setup again.

Setup the fob key:

This is the setup procedure I have found how it should work, I think it's just a translation problem:

1. Get inside the car.
2. Turn the ignition key to the position 2 (before crank the engine).
3. Look doors, luggage and hood by the button on the dash panel, not remote controller!
4. Push the lock button on remote controller, turn signal indicator flash when correct done.
5. Take out the key and after that open the locks by remote controller.
6. Repeat this procedure if you have more then one key.

This is the setup procedure how my car work, not exactly as above:

1. Get inside the car.
2. Turn the ignition key to the position 2 (before crank the engine).
3. Look doors, luggage and hood by the button on the dash panel, not remote controller!
4. Push the lock button on remote controller.
5. Take out the key and after that push the lock button, in my case the turn signal indicator flash when correct done.
6. Push the unlock button on remote, doors open.
7. Repeat this procedure if you have more then one key.

If you for some reason want to reset the old setup I think it's most easiest to disconnect the car battery for five minutes.

Some radio / CD players have a protection code you must enter after disconnected the battery, the radio in my car was not of that construction luckily because I didn't have any code for it.

Keys:

I don't have the original fob keys and did some research on internet. I found that in Europe the remote controlled anti theft alarms are transmitting at 443 MHz frequency, this car is imported from US and they use the 315 MHz frequency. I have some replacement transmitters, have they changed the frequency to European standard ? No, I did a check with a frequency analyzer and it show that they transmit at 315 MHz frequency so it's still the original alarm in the car.

When I bought the car I ordered these replacement shells for the fob keys. Later I shall do this work and take the old keys apart and install the new shells. It will look great! Today I don't use the built in remote in these keys, I have a separate remote. These keys need two Lithium batteries each, CR 2016, they will last many years.