Gen 1 Vampire Drain (Possibly) Solved (or Hacked)

[HaveBlue]

What did you use to automate that and how did you do it? I wanted to look into that but it'll be tricky to turn on BT when I walk outside of my kitchen

If you have a Samsung phone, it's simplified without third party apps. You can use Modes and Routines to create a routine.
At my work is easy. If my phone connects to the work wifi, the BT turns off and then turns back on when it disconnects. When I get in the elevator, I lose wifi. Amazingly BT reaches my car two floors below and keeps it awake otherwise.

Same routine at home but like you, my car is too close to lose wifi so I just have a routine that turns BT back on in the morning before I go to work. All other places, my phone is usually out of range.

Samsung phones you can also program the volume rocker to turn BT on and off with a double tap even with the screen off. You probably need to leave BT scanning off in the settings.

If you don't have a Samsung, you'll need a third party app like Tasker; though the UI sucks. So maybe Automate: https://play.google.com/store/apps/details?id=com.llamalab.automate Google has made it tough to control BT on non rooted phones so I'm not sure on third party app access to those functions anymore.

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[mudito]

If you have a Samsung phone, it's simplified without third party apps. You can use Modes and Routines to create a routine.
At my work is easy. If my phone connects to the work wifi, the BT turns off and then turns back on when it disconnects. When I get in the elevator, I lose wifi. Amazingly BT reaches my car two floors below and keeps it awake otherwise.

Same routine at home but like you, my car is too close to lose wifi so I just have a routine that turns BT back on in the morning before I go to work. All other places, my phone is usually out of range.

Samsung phones you can also program the volume rocker to turn BT on and off with a double tap even with the screen off. You probably need to leave BT scanning off in the settings.

If you don't have a Samsung, you'll need a third party app like Tasker; though the UI sucks. So maybe Automate: https://play.google.com/store/apps/details?id=com.llamalab.automate Google has made it tough to control BT on non rooted phones so I'm not sure on third party app access to those functions anymore.

I have an S24U. I'll start playing with the routines tonight. Will see If I can find a way to play with this.

The problem is that lots of times I use Airpods so I won't be able to Turn BT OFF all the time but most likely I should be able to reduce the wakes substantially

Thanks!

 

[HaveBlue]

Here are some screen shots that should help. I also use earbuds and have them as an exception so it doesn't turn off BT when I'm using them.

Here's the one to turn on in the morning.

Here's how to assign buttons for when it's an exception to what you need.

 

[Riviot]

Is there a place that says that you can not do that? Or that you must disconnect belts?
But even then, how this can kill a 12V battery while you still have plenty of HV battery that should charge 12V !?

It was in service when it happened, they were chasing down a wiring harness fault so I assume either service mode turns DC to DC off or it was pulling it so often the batteries just gave out. Before going into service, I noticed unusually high VD so the 12v's might've been on their last leg, 53k miles and 2.5 years old will do that ??‍

In other news, I couldn't figure out why my music kept turning off in my earbuds today. I finally looked at the phone and saw Back That Azz Up was playing in the truck, so I cranked it up for a minute before disconnecting. Surprisingly even in service mode Spotify still transfers to the truck with they wake it up.

 

[Tim-in-CA]

And another update on my OBD2 port charging setup (3A BT, single 12V battery, R1S) and monitoring Electrafi data:

• I had originally plugged the OBD2/Battery Tender in on Thursday @ ~ 2pm and had to unplug to go for a quick errand on Friday @ 2pm.
• Over the course of those 72 hrs, my reported battery percentage dropped only 0.9% ... with the recent FW update, I would have lost at least 6% of range (prior to the latest FW, I would have lost about 3%, so still a big improvement).
• Over the course of those 72 hrs, the vehicle did wake 4 times for a total of ~5:30 (one of those hours was initiated by me as a test by waking and sleeping the vehicle).
• My errand was short (18 miles, 3 stops, gone 1 hr 40 min total).
• When I returned home, as a test, I decided to not plug into the OBD2/Battery Tender and observe the vehicle's behavior. The vehicle went back into its sleep/wake cycle that I have observed after a drive or a DC or AC charge (~1 hr sleep and ~20min wake).
• After 3 of these cycles, I plugged the OBD2/BT again, and the vehicle has been sleeping continuously for the past 14 hrs.
• I reviewed the garage camera footage after I plugged in and the BT charged the 12V battery for about 15 min (front LED blinks while charging). Unfortunately, I don't have a way to monitor the BT unless I connect a smart plug to it log power draw (I don't have an extra one available).

My next test will be to see how long the vehicle takes to get to my last observation of 30min sleep / 15min wake when unplugged from the OBD2/BT charger.

Aaaand another update. Approximately 48 hours after the last time the vehicle woke up (by me), my R1S (with OBD2/Battery Tender still attached) woke up on its own, stayed awake for 2 hours and consumed 0.2%/0.25kWh/0.62mi from the HV battery then went back to sleep ?. I suppose the vampire needed to be fed. ?

I'd say that connecting the 12V battery(ies) using a Battery Tender is the surefire way to nip VD in the bud if the vehicle is parked for a period of time. The OBD2 port connection (assuming the vehicle is garaged), is the simplest method. Next Monday, I'll probably disconnect the BT to see how long it takes for the battery to get back to its frequent sleep/wake cycling.

 

[Riviot]

Is there a place that says that you can not do that? Or that you must disconnect belts?
But even then, how this can kill a 12V battery while you still have plenty of HV battery that should charge 12V !?

I confirmed with service when I picked up my truck today that they left the seat belt plugged in to keep the truck on and power going to the wiring harness as they traced the problem (chafing in the rear wheel wells).

DC to DC is supposed to keep running to top it off, but it was a constant drain/recharge over the course of days, so weak batteries just gave out.

 

[mudito]

Okey, with BT Disabled in my phone, the R1T went to sleep yesterday at 8:30pm and only woke up this morning when I turned BT back on and approached my truck to get ready to drive it

So it definitely looks like a brand-new 12V battery minimizes (Eliminates?) the constant Sleep/Wakes cycle?

Also, I did notice that I was getting better range and efficiency, I did not know if it was just a placebo or real, so I did pay attention last night when driving back from a place that I frequent weekly and got this:

(Conserve mode, and mind you, it's a bit downhill from this place to my garage). Normally, I was getting 2.50 to 2.85mi/kWh in that same stretch at the same speeds.

There's definitely less 12V charging happening in my vehicle and that's 100% impacting my range/efficiency and battery drain.

 

[shap]

Okey, with BT Disabled in my phone, the R1T went to sleep yesterday at 8:30pm and only woke up this morning when I turned BT back on and approached my truck to get ready to drive it

So it definitely looks like a brand-new 12V battery minimizes (Eliminates?) the constant Sleep/Wakes cycle?

Also, I did notice that I was getting better range and efficiency, I did not know if it was just a placebo or real, so I did pay attention last night when driving back from a place that I frequent weekly and got this:

(Conserve mode, and mind you, it's a bit downhill from this place to my garage). Normally, I was getting 2.50 to 2.85mi/kWh in that same stretch at the same speeds.

There's definitely less 12V charging happening in my vehicle and that's 100% impacting my range/efficiency and battery drain.

That is a bit strange as as much as charging a 12V battery takes per 24 hours (let's say 2kWh) - it should not affect driving efficiency in any visible way, IMHO.

I installed 12V battery sensor that reports to my Home Assistant:
I will continue to monitor this. I took delivery in May 2023, the car production date is March 2023, 1 battery. 23k miles

 

[mudito]

That is a bit strange as as much as charging a 12V battery takes per 24 hours (let's say 2kWh) - it should not affect driving efficiency in any visible way, IMHO.

I agree with you. It should not But since my 12V battery (dual 12v) died suddenly, I'm guessing the Dc-to-Dc circuit was working extra time trying to keep up with a depleted battery.

My guess is that there's a vicious cycle:

• 12V battery needs charging
• The car wakes up to charge it
• Since the car is awake it consumes more 12v
• Since it's consuming more 12V by not sleeping, the VD is higher
• Once 12V reaches a certain voltage, car goes back to sleep
• Then after a few mins 12V voltage drops below a treshold and the car wakes up again for charging...

 

[josh0]

That is a bit strange as as much as charging a 12V battery takes per 24 hours (let's say 2kWh) - it should not affect driving efficiency in any visible way, IMHO.

I installed 12V battery sensor that reports to my Home Assistant:
I will continue to monitor this. I took delivery in May 2023, the car production date is March 2023, 1 battery. 23k miles

Interesting. It does look like it’s using a fairly standard lead-acid charge cycle, even with an abbreviated float stage. Then there’s just that voltage drop to about 12.2V right before it wakes up and begins the cycle again.

 

[shap]

Indeed, here is another image:

So during sleep something is draining the 12V battery, I would say maybe it is a Bluetooth sensor, maybe something else. BT sensors are up and running as I can see them in the BT scanner. Even if the proximity lock is off.

 

[shap]

In case anybody is interested, I bought the following to monitor a 12V battery through the OBD2 port:

https://www.amazon.com/dp/B01ETRIFHE?ref=ppx_yo2ov_dt_b_fed_asin_title
https://www.amazon.com/dp/B0CQD1Z2K8?psc=1&ref=ppx_yo2ov_dt_b_product_details

Explanation of how to configure:

Shelly fits inside the OBD2 adapter, so it really easy to use.

 

[josh0]

In case anybody is interested, I bought the following to monitor a 12V battery through the OBD2 port:

https://www.amazon.com/dp/B01ETRIFHE?ref=ppx_yo2ov_dt_b_fed_asin_title
https://www.amazon.com/dp/B0CQD1Z2K8?psc=1&ref=ppx_yo2ov_dt_b_product_details

Explanation of how to configure:

Shelly fits inside the OBD2 adapter, so it really easy to use.

Very cool use of a Shelly. Hadn’t thought of that!

 

[mudito]

In case anybody is interested, I bought the following to monitor a 12V battery through the OBD2 port:

https://www.amazon.com/dp/B01ETRIFHE?ref=ppx_yo2ov_dt_b_fed_asin_title
https://www.amazon.com/dp/B0CQD1Z2K8?psc=1&ref=ppx_yo2ov_dt_b_product_details

Explanation of how to configure:

Shelly fits inside the OBD2 adapter, so it really easy to use.

What's the power-draw of that wireless monitor itself? I'm assuming that contributes (maybe just a tiny bit) to the voltage drop...?

 

[shap]

What's the power-draw of that wireless monitor itself? I'm assuming that contributes (maybe just a tiny bit) to the voltage drop...?

Less than 0.2 watt, so negligible. (you need to put it in ECO mode for this)

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