Hi all,
please could those familiar with with CAS2 help me with a couple of questions? I'm more clued up on EWS2 operation so I'm a bit stuck with this one:
2005 E90 318 failed to switch the engine off upon pressing the start/stop button. The customer stalled the engine and called the AA as all the dash lights were still on. AA man disconnected the battery hoping this will reset things...... After this apparently the engine would start and stop but he was unable to pull the key out from the slot. Customer claims the aa man wiggled it and basically ripped it out.
After that there's no show, no reaction to the key being put in at all. He shut the car and advised to take it to a garage (AA attitude).
Oh, and he also quoted missfire on cylinder 2..??
Ive picked this up from there. The battery is being drained by around 2A current. Ive chased it to the CAS2 module. After disconnecting the box the drain goes down to about 0.4A which is about right.
Strange thing is that with the CAS module in place I can read codes from pretty much everything, CAS, engine ECU etc as if the ignition was on, even though none of the dash lights are lit. start/stop button doesnt seem to be doing anything (although it's backlight is on).
Sometimes there is seatbelt light on the dash, sometimes nothing at all. There was a bunch of fault codes in the CAS that Ive cleared but there are 2 in the instrument cluster that keep comming back, one to do with CAN.
Question is, can someone make an educated guess based on this or some further tests as to whether the CAS module is at fault (as it powering only certain circuits) or if is the key antenna module that's gone following AA muppet forcing the key out?
Another question is what is the behavior of the key antena module when there is no power applied to it? Should it let me slide the key in and pull it out or not?
I know the CAS modules are a common problem and I'd be keen to replace it, but after the battery being disconnected and they key forced out I'm not sure if this is the best bet.
The wiring between the CAS and key module doesn't really give any clues as to what to expect. I know that if the key is not recognised in EWS2 system the starter will not kick in, but not sure how the story goes in CAS and whether the instrument cluster would be neccessary for the engine to run (no power to cluster due to faulty CAS module? damaged cluster following disconnecting the battery with the ignition on??)
Would anyone be able to point me in the right direction for further checks? Any detail would be much appreciated.
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