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Old 04-29-2017, 05:30 PM   #1
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Did you test both doors?
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Old 04-30-2017, 06:05 AM   #2
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M535. The key fob will lock and unlock the car fine for about the 1st 30 seconds. Then when the alarm arms it won't do it anymore. However, when you press unlock, it does light the door lights and the dash lights. When you unlock it manually with the key and open the door the alarm goes off until you turn the ignition on.
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Old 04-30-2017, 08:34 AM   #3
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That's the long list of codes my immobilizer is throwing. Durametric won't clear them so I have no idea which ones are still an issue, and I don't have access to durametric. I had my Indy shop pull the codes the last time they worked on it.
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Old 05-01-2017, 05:51 AM   #4
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That's the long list of codes my immobilizer is throwing. Durametric won't clear them so I have no idea which ones are still an issue, and I don't have access to durametric. I had my Indy shop pull the codes the last time they worked on it.
What sticks in my mind is that we both have the exact same issue and that we have to reverse polarity on the lock / unlock. If you sit in the car with and open all the doors do they lock as soon as you start the car mine does ( not sure if it's supposed to though )
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Old 05-01-2017, 08:40 AM   #5
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Do you also have an M535?
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Old 05-01-2017, 09:28 AM   #6
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Do you also have an M535?
No mine is a m543 looking at the wiring diagram and am wondering what and why are the key contacts reversed
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Old 05-01-2017, 09:29 AM   #7
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No mine is a m543 looking at the wiring diagram and am wondering what and why are the key contacts reversed
only drivers door has key
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Old 05-01-2017, 09:36 AM   #8
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No mine is a m543 looking at the wiring diagram and am wondering what and why are the key contacts reversed
So, you have the same behavior with the new immobilizer, Craig?
That points to something on the car being wrong. Probably door latch issues. I still think you both have bad door latches (probably on both doors).

Also, the connectors in the door frames are known points of failure. Moisture can get in and corrode the pins/sockets. They can be cleaned with contact cleaner.

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Old 05-07-2017, 11:32 AM   #9
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Well that's 1 issue cleared locking doors when ignition on is a dealer option
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