A new record in Low Battery voltage levels?
#21
12-22-2022, 10:12 AM
Veteran Member
#22
12-22-2022, 11:13 AM
Veteran Member
wj
#23
12-22-2022, 01:50 PM
Veteran Member
#24
12-22-2022, 02:06 PM
Veteran Member
#25
12-22-2022, 04:34 PM
Veteran Member
#26
12-22-2022, 05:19 PM
Veteran Member
In regards to the query of locking your car while it was garaged; Did you DOUBLE LOCK IT! (Yes, it’s a ‘thing!’)
When your car is single locked it assumes you’ll be returning soon and if it picks up your RFID key fob it will, more or less get your vehicle ready for you to come start it.
Double locking it puts all that to sleep. It’s surprising how strong the key fob signal can reach. I work in a 6000 square-foot building with a parking lot in front where you pull in straight and sometimes I park across the street along the curb so & my office is in the back of the building and I’m usually seared near the very back wall.
At that distance, my car trunk was open and I assume someone messed with it but when I saw the mirrors, I realized the car was still locked. (So I butt-opened the trunk.) Yes, I had only single locked it.
Now I double lock my XJL. Except the other night, I assumed I was going to be traveling soon and plans changed and I did not. Then the next morning the car wouldn’t start probably because the key fob was too close to the vicinity of the car (Normally I keep my fob in an Altoids Tin to block the RFID signal. I know this works because I put the fob in the tin in my pocket, and stood right next to the door, and it would not recognize it.
When your car is single locked it assumes you’ll be returning soon and if it picks up your RFID key fob it will, more or less get your vehicle ready for you to come start it.
Double locking it puts all that to sleep. It’s surprising how strong the key fob signal can reach. I work in a 6000 square-foot building with a parking lot in front where you pull in straight and sometimes I park across the street along the curb so & my office is in the back of the building and I’m usually seared near the very back wall.
At that distance, my car trunk was open and I assume someone messed with it but when I saw the mirrors, I realized the car was still locked. (So I butt-opened the trunk.) Yes, I had only single locked it.
Now I double lock my XJL. Except the other night, I assumed I was going to be traveling soon and plans changed and I did not. Then the next morning the car wouldn’t start probably because the key fob was too close to the vicinity of the car (Normally I keep my fob in an Altoids Tin to block the RFID signal. I know this works because I put the fob in the tin in my pocket, and stood right next to the door, and it would not recognize it.
Double locking is only of use in some markets and engages the deadlock. The car exits convenient mode regardless of whether you lock it or not, it just takes a lot longer if you don't so consumes more power while everything keeps spinning. The power draw will eventually be minimal though.
If the car is locked, your car isn't constantly scanning for the fob, you have to either trigger it to talk to the fob by pulling on a door handle, etc, or by pressing one of the fob buttons. The process is all explained in the workshop manual. The car will eventually exit convenience mode, even if you leave a fob inside the car. You won't come back to find a flat battery, and yes I have tried it.
#27
12-22-2022, 09:35 PM
I monitored my x150 '07 NA with an ammeter. I button-lock mine, and have measured a drop in 3 minutes from around 9A to about .030, or 30 mA. I typically lock twice out of habit. This beeps the alarm, but makes no difference in the drop to quiescent current. If I simply close up the car, the tech spec sheet says the X150 will drop to quiescent in 15 minutes. I have not tested this, since triggering the lock gets the job done. FWIW, I also shut off the climate control, so that the temp sensor fan shuts off. Doubt it matters any, but its a habit. Since I started this, my battery has never run down.
Thread
Thread Starter
Forum
Replies
Last Post
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)