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Fixing BMW CAS Car Access System follows a complex process. This guide will help you with instructions on how to troubleshoot the BMW CAS (Car Access System) module using an OBD-II diagnostic scanner. Let’s learn what CAS module is all about, what systems it covers, and how to read codes from the BMW CAS module. What is the BMW CAS module?CAS is an acronym for the Car Access System. The main two objectives of the BMW CAS module include:
The purpose of CAS module is to generate random key code every time someone starts up the vehicle. Then it synchronizes the code with the Engine Control Unit, which BMW calls DME or DDE. If you are going to replace a faulty BMW CAS control unit, make sure that it is programmed if the module is new. In case any used BMW CAS module is installed, the Engine Computer (DME) and key must be supplanted with those from the donor car. Symptoms of Bad CAS Module:The following are a few symptoms you may likely detect if the CAS module or one of its components conks off.
Vehicle Might Not Start:One of the reasons the vehicle might not start is a defective CAS module that has been damaged from water or due to low or over voltage. The best way to fix this problem is to replace the CAS module and programming. Bring your car in for BMW repair auto shop center for an easy fix. Mismatched Key: The code in the CAS module might not conform to the code stored in the DME/DDE module. To resolve this issue, execute the CAS reset procedure under DDE/DME module. How to read/remove CAS Fault Codes:If you are having issues, you must first figure out the fault codes from the CAS module. If there is any code, it needs to be addressed. If codes are Stored/Past status, they can be cleared.
>> Go through codes from CAS Module >> Clear codes from CAS Module >> Perform Adaptations, Activation, Tests >> Reset CAS Module Where is BMW CAS Module Located:The location of the CAS module is under the steering column. To erase the code from the BMW CAS module, all you have to do is get under the dashboard on the driver side and take off the plastic cover under the dashboard. As you lift the panel off, you will find your BMW CAS module, a black or white box. While removing the BMW CAS module, make sure it is programmed and in sync with the DME and car keys. The process is a bit complicated, reach out to the experts for professional intervention to fix BMW Greensboro.
1 Comment
Jeff Grindstaff
10/1/2022 07:51:46 pm
Thank you very much for info i seen here. Have been looking for info on cas modual on a E60 2004 for over a month. Your a wonderful. Have been on every BMW site know to man. Have even learned some german that's how hard i've looked. You so much appreciated thanx again. Also your write up was short sweet and to the point i did not need to read 5 pages of nothing to find it.
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