toecutter3 Posted June 24, 2016 Report Share Posted June 24, 2016 (edited) Brand New C Max Hybrid, 2016. 302a package, type 1 intelligent access key. Occasionally when I get in the car, the door unlocks to let me in, but on the instrument panel I get the message "No key detected" however, the car still starts right up. Additionally, sometimes when I lock the door, either by touching the sensor on the door handle or by using the key fob, about 1 minute later the horn starts beeping and the lights flash. If I press unlock, and then lock again, the alarm ceases, and it doesn't happen again. What? What am I doing wrong? I have checked the doors to see they are closed. This doesn't happen every time. Any suggestions? Edited June 24, 2016 by toecutter3 Quote Link to comment Share on other sites More sharing options...
nisswadog Posted July 16, 2016 Report Share Posted July 16, 2016 I have the same problem and have brought in 3 times so far. No solution yet and am curious whether any others have had this and had resolution. Ours is also a 2016 with a 302A option. But, sometimes doing a quick unlock and repeat lock doesn't solve the problem. Ugh! Quote Link to comment Share on other sites More sharing options...
jestevens Posted July 18, 2016 Report Share Posted July 18, 2016 I've had issues getting out of the car where I open the front driver's door, press the lock button, change my mind and decide I need something out of the second row driver's side door so I go to open the door behind the driver's side door and the alarm goes off when the door opens. Looking at the dash it shows something like that, "Key not detected" until I bring the key within proximity to the dash or use the remote buttons. This isn't the exact sequence - if I knew the exact sequence of what was happening I would swear a lot less. Whatever it is seems like more of a software bug than anything else though. Then again I used to be able to do the same thing with the HHR and the alarm would go off too..it's a situation where it doesn't expect the back door to be opened. Apparently my behavior patterns aren't consistent with however these engineers think about cars. Quote Link to comment Share on other sites More sharing options...
plus 3 golfer Posted July 18, 2016 Report Share Posted July 18, 2016 Have you changed the battery in the key FOB? Is the key FOB in your pocket behind a smartphone or set of keys? Quote Link to comment Share on other sites More sharing options...
scottwood2 Posted July 18, 2016 Report Share Posted July 18, 2016 Mine is an SE so I just have the key with buttons but I had issues with just my key. My other half key worked fine. Changed the battery (only about 4 months old at the time) and it has been good since. Maybe something to try. Do both key fobs behave the same way? Quote Link to comment Share on other sites More sharing options...
toecutter3 Posted July 19, 2016 Author Report Share Posted July 19, 2016 I have done some sleuthing. 1. Fob battery. It is good. I can activate the locks, or deactivate the alarm from a substantial distance.2. Both fobs behave the same.3. The "no key detected" happens less when I pause before opening the door, and if I approach from the front of the car. LESS!4. When it happens it doesn't matter if I lock the door with the touch pad on the handle or if I use the fob. I can live with it, I just have to walk away from the car slowly. When it is time for service, I will have them look at it. Quote Link to comment Share on other sites More sharing options...
reedmother Posted October 3, 2016 Report Share Posted October 3, 2016 The protocol is this: when you turn off the engine by pushing the button, be sure your foot is off the brake. Quote Link to comment Share on other sites More sharing options...
toecutter3 Posted October 7, 2016 Author Report Share Posted October 7, 2016 The protocol is this: when you turn off the engine by pushing the button, be sure your foot is off the brake. OK, I'll give it a try, and report back. Quote Link to comment Share on other sites More sharing options...
Bill-N Posted October 14, 2016 Report Share Posted October 14, 2016 The protocol is this: when you turn off the engine by pushing the button, be sure your foot is off the brake. On my 2013 SEL, turning off the car works as expected whether or not the brake is pressed. Quote Link to comment Share on other sites More sharing options...
jestevens Posted October 16, 2016 Report Share Posted October 16, 2016 I think I finally was able to duplicate my issue.. Try this.. 1) Car in Park, engine still on2) Press button to open hatch3) Press Engine button to turn car off4) Open Driver's door5) Press LOCK button on driver's door6) Forget that your jacket is in the back seat and press the UNLOCK button7) Get out of the driver's side and open rear left passenger door, leave driver door open to press LOCK button after you retrieve items from back seat8) Within two seconds after pulling left rear passenger door alarm goes off At this point front driver, rear left side passenger and rear hatch doors are open. 9) Say Curse Words10) Rush to sit in open driver position11) On dash appears "Key not detected" or some crap12) Press button to start engine13) Alarm shuts off I think it's a bug in the software - since the car has proximity antennas all around it to detect the RF key it -should- know the key is still present near the vehicle and can avoid stupid behavior I see other cars' alarm systems exhibit, but apparently not. obob 1 Quote Link to comment Share on other sites More sharing options...
stolenmoment Posted October 17, 2016 Report Share Posted October 17, 2016 Wow. Having written software that attempts to track a similar set of events, I can understand a bug after you do that long and (admit it!) rather unlikely sequence... Good detective work! Quote Link to comment Share on other sites More sharing options...
jestevens Posted October 17, 2016 Report Share Posted October 17, 2016 I write software for a living too so I'm sort of used to the abuse. The sequence looks complicated when it's written out but in reality it all happens in two minutes, maybe less without thinking about it, until I start swearing when the alarm goes off. I think in the past I've done it without opening the back hatch too, I'll have to test it more. To me the overriding factor should be that when you legally press the UNLOCK button my expectation would be that the alarm should be disabled, apparently that's not happening in this case. With the C-MAX you even get the benefit of having the RF key to check for (if equipped) but maybe they don't count on that being there for folks who have the standard key. Quote Link to comment Share on other sites More sharing options...
toecutter3 Posted October 17, 2016 Author Report Share Posted October 17, 2016 (edited) The protocol is this: when you turn off the engine by pushing the button, be sure your foot is off the brake. 10 days later and no alarm issue. Thanx reedmother Edited October 17, 2016 by toecutter3 Quote Link to comment Share on other sites More sharing options...
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