Originally Posted by Hawk Monster
There is no ONE module that works the alarm system. Use the search for "panic alarm". I gave a pretty accurate explanation of ALL the modules involved. It really is a difficult syatem to deal with. Do you have access to a repair manual?
Be prepared the siren will go off when you disconnect it. That is the reason for the secondary battery. I'd say do it outside the garage or wear ear protection. That noise is worse then the seat belt when it comes to irradation.
Thanks for the warning on disconnecting it. I have the service manuals for the Crossfire as well as the all the service information for the very similar SLK320 R170 in my MB Star Diagnostic system. I have been able to see that the security system has its wires in everything. We have been able to check and read all the modules except the anti-theft module. the reason we can't read it with the MB system is that while it does have a MB part number it is unique to the Crossfire so the MB system doesn recognize the version. I probably need a DRBIII as I am pretty sure that I tripped the system when I first attempted to program the unlocked ECU to the Crossfire for my V8 conversion. Once all coding was done in the ECU (we had to use developer mode and do custom varient coding) you have to run "drive authorization" for the ECU for it to learn its anti-theft coding. This went very smoothly and completed just fine but still no cranking. This is likley caused by a stored fault in the SKREEM module which again is the only module we cannot read in DAS. All other modules are working fine with no fault codes at all. If I cannot find a DRBII with the special Crossfire PCMI card and multiplexer cable I was hoping I could clear the the SKREEM by removing all power from it. This seemed to work in the SKREEM no more thread, except he cleared it by unplugging the SCREEM. If this would work, discconecting the primary and secondary battery should accomplish the same thing and is much easier than removing the gauge cluster to get to the SKREEM.
Edit: Just a quick note on DRBIII... I am not impressed! It seems very limited and cumbersome compared to the MB STAR DAS system. The DRBIII for a Crossfire or Sprinter requires special PCMI cards and special cables and muti-plexer. The system looks like a band aid to allow Chrysler to work on Crossfires and Sprnters that really are Mercedes through and through. The MB STAR system has a semi-secrect version called developer mode which requires a special key (I have) that allows you to do just about anything you want. The only problem is that it is all in German as it is used by the engineers to develop new models and prototyes.