I've been having a number of problems with my '24 Eray related to phantom alarms but just uncovered what I think is a new issue. I have my mirrors set to fold in when the car is locked. I just now walked up to the car in the garage and confined that the mirrors are out and no alarm light is illuminated. However, when I tried the passenger door, it is locked. The driver side door is still unlocked. Does anyone know how someone could replicate that without being inside the car at that time?

Is there a way to manually set a door lock to engage after exiting the car through that door? I was going in and out earlier today but did not intentionally lock it and would use the fob if I wanted it locked. I can't tell if this is an odd feature or a bug. Thanks for sharing the knowledge.

 

I think there is an option to unlock both doors or just the driver door.

 

when cars act weird , the first place I go to is the battery voltage. When the battery is low, the car can trigger all kinds of things…

 

if I can believe what is shown on the dash, I’ve got between 13.4-13.8V.

 

what’s the battery voltage when you get in the car in the morning without the engine being started?

 

Disconnect negative wire of battery for 15 mins.
Should re-set any electrical modules for bugs or gremlins.
If your issue continues, will need service..

 

Looks like it is 13.2V

 

Is the FOB far enough from the car in the garage for the doors to lock and the mirrors to fold? I know it does not take much distance to lock my doors, but I thought I would ask just in case you were not taking the FOB into the house with you.

 

I have done it both ways. In the most recent case of the passenger door locking, the fob was 10' away. The self-arming alarm has happened with the FOB nearby, 50' away, and with me in my pocket seated in the driver's seat. When the alarm self-arms, it does not lock the doors.

GM engineers have said it was due to an aftermarket piece of carbon fiber that I've applied over the chrome pieces in the interior somehow interfering with the door lock on the passenger side. I am doubtful of that diagnosis but have removed the accused accessory. Autonomous locking of one door while the car is unoccupied is a new but perhaps related(?) problem. I was unaware of how to make only one door lock and that was the genesis of this thread. If there is a way to do that, I'd like to know as maybe I did it while in the car earlier that day.

 

I know that there is a lock/unlock button just in front of the open door button. While standing outside of the car, you can push the lock button inside the door and close the door. Both doors will be locked and the alarm will arm. What I experienced the other day was only one door locking and no alarm arm (ironically, given my other problems with the car).

Thanks for asking the question, it made me do the above experiment and I learned something, but didn't solve the problem yet. One step at a time!

 

First your voltages are fine. From 13.2 to 13.4 is what I get on the E-Ray's fully charged 12 volt Li-Ion battery to WHAT GM and the battery manufacturer want! The alternator charges to 13.3 volts. The several page Tech Talk re the E-Ray 12 volt battery quotes 13.3. The GM sold Li-Ion/Lead Acid charger also when fully charged (if you wait 8 to 24 hours to check the voltage as recommended) as is 13.3 volts, same as where the alternator charges. For C8 Lead Acid batteries GM states they only charge to 80% for energy saving (as many modern cars do as well.)

There is no info as to why the Alternator only charges to 13.3 volts or the GM sold Li-Ion/Lead Acid battery charger does as well. That is about 85% capacity for a Li-Ion battery. Could be for energy savings. My E-Ray has done fine for 18 months and I have only used the GM Charger to test what it does. I typically drive several times a week a 60 mile round trip to town. Within 5 to 10 miles after the car is started the dash (alternator says battery voltage) reduces to 13.3 volts. When parked I measure battery voltage with quality Fluke VOM. Can also see the battery voltage (and not the Alternator voltage which is what the Dash displays) when using Stop/Start. The engine shuts off so the Dash display changes from Alternator voltage to Battery voltage in about 5 to 10 seconds.

I believe the Keyless door opening can be set to ONLY open the Driver's Door. That is a safety issue so if someone is watching you open the driver's car door they can't quickly open the passenger door and get in the car! I have my wife's BMW set that way.

I have my car lock , fold the mirrors and beep when I leave. Like whatever lot I I park in for anyone looking knowing the car is locked! In the garage it does the same.

 

Carbon fiber is very good at blocking radio signals. So I wouldn't dought what the engineers told you. I've been wondering where they put all of the antennas in the C8 . If CF is covering any of them the CF can block the signal. See it with Carbon Fiber RC Boats if you don't use an antenna mast coming through the deck on them.

 

Thanks for commenting. I'm not convinced that it is real carbon fiber as the bits and pieces were only $10-20 imported from PRC. Moreover, if the car was refusing to comply with a RF command, then maybe. What I'm experiencing is the opposite. The car is doing things unprompted.