Ford pass saying battery saver mode

[Deanm]

Ford, where are you? 2024 hybrid, drive 20-30 miles every day. Within an hour of shutting the truck off it enters battery saver mode. Been to the dealer the dealer twice, they check the battery and say it meets Ford’s specs. They have installed the software upgrades, but still goes to sleep every day. 11,000 miles, and headed back to the dealer again. AGAIN, FORD WHERE ARE YOU?

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[HeyBales]

Ford, where are you? 2024 hybrid, drive 20-30 miles every day. Within an hour of shutting the truck off it enters battery saver mode. Been to the dealer the dealer twice, they check the battery and say it meets Ford’s specs. They have installed the software upgrades, but still goes to sleep every day. 11,000 miles, and headed back to the dealer again. AGAIN, FORD WHERE ARE YOU?

Well - not on here to hear!

I'll mention there is an SSM about invalid notice of battery saver.
It's not really happening - but you get alert anyway.

Poster shared what happened in their case.
There is a TCU retained value for SOC%, taken from the active calculated one in the BMS.
That's used for the system to decide it's sending up a final notice about low battery and disabling the modem, immediately, rather than the 14 days or reaching low voltage.
Their value was stuck - not updating to the actual.
Seems a TCU software rewrite was done to get around issue.

Now - IIRC there was another very old post where the issue was in the Ford server data - truck was sending up new info, server wasn't being updated so it sent the existing too low enabling deep sleep mode alert to Fordpass.
Since server thought truck was asleep it never attempted remote contact, so it might as well have actually been in deep sleep with modem disabled.

Battery in both cases checked just fine with multimeter - the path was messed up for getting the alert.

ETA - just thought of another way since you said within an hour.
You could actually be having a battery voltage drop from decent level to under the line at about that hour - causing the truck to actually do deep sleep mode to conserve the battery.
That could be your battery tests above warranty replace level, but still not great.

Or you could have some drain that does take it down during the 75 min before all systems are supposed to be asleep, then it goes asleep, and no more excessive drain from whatever it is.
Now that is where the SSM for the software update to the ACCM might make sense - though if yours is actually daily - not exactly the intermittent the SSM is describing.
Also, that SSM says it does drain it - so a day or two completely dead battery.
So that doesn't match what you are getting.

Well - few options to pursue.
Get out your multimeter to confirm a couple of them.

 

[Deanm]

Well - not on here to hear!

I'll mention there is an SSM about invalid notice of battery saver.
It's not really happening - but you get alert anyway.

Poster shared what happened in their case.
There is a TCU retained value for SOC%, taken from the active calculated one in the BMS.
That's used for the system to decide it's sending up a final notice about low battery and disabling the modem, immediately, rather than the 14 days or reaching low voltage.
Their value was stuck - not updating to the actual.
Seems a TCU software rewrite was done to get around issue.

Now - IIRC there was another very old post where the issue was in the Ford server data - truck was sending up new info, server wasn't being updated so it sent the existing too low enabling deep sleep mode alert to Fordpass.
Since server thought truck was asleep it never attempted remote contact, so it might as well have actually been in deep sleep with modem disabled.

Battery in both cases checked just fine with multimeter - the path was messed up for getting the alert.

ETA - just thought of another way since you said within an hour.
You could actually be having a battery voltage drop from decent level to under the line at about that hour - causing the truck to actually do deep sleep mode to conserve the battery.
That could be your battery tests above warranty replace level, but still not great.

Or you could have some drain that does take it down during the 75 min before all systems are supposed to be asleep, then it goes asleep, and no more excessive drain from whatever it is.
Now that is where the SSM for the software update to the ACCM might make sense - though if yours is actually daily - not exactly the intermittent the SSM is describing.
Also, that SSM says it does drain it - so a day or two completely dead battery.
So that doesn't match what you are getting.

Well - few options to pursue.
Get out your multimeter to confirm a couple of them.

Good information, thank you!

 

[Russ B.]

You do this every night?
So every night, not matter what charge level it's actually at - you are telling the system you have a new battery?
That ain't right!

Battery Sensor Reset
When you install a new battery, reset the battery sensor by doing the following:

1. Switch the ignition on, and leave the engine off.

Note: Complete Steps 2 and 3 within 10 seconds.

1. Flash the high beam headlamps five times, ending with the high beams off.
2. Press and release the brake pedal three times.

The battery warning lamp flashes three times to confirm that the reset is successful.

 

[Russ B.]

Those are the instructions, directly from the owners manual. I tried it that way for several tries, then gave up. Later, I noticed the instructions on a post and the guy added, "after the three brake pedal presses, turn off the ignition, then turn it back on and the battery light will flash 3 times, with the third being two micro pulses". He was right and saved me any further grief over the BMS reset. On a snarky note: If Ford cannot proofread their own print work, do we have even a thin chance that they have play-tested their own software. Really, we are the play-testers and we are looking at drafts 2022 - 2025 of their OS. I routinely helped my kids with their homework, but I never did it for them.

 

[HeyBales]

Those are the instructions, directly from the owners manual. I tried it that way for several tries, then gave up. Later, I noticed the instructions on a post and the guy added, "after the three brake pedal presses, turn off the ignition, then turn it back on and the battery light will flash 3 times, with the third being two micro pulses". He was right and saved me any further grief over the BMS reset. On a snarky note: If Ford cannot proofread their own print work, do we have even a thin chance that they have play-tested their own software. Really, we are the play-testers and we are looking at drafts 2022 - 2025 of their OS. I routinely helped my kids with their homework, but I never did it for them.

I was more confirming that was indeed the process you are doing, every night.

Process Instructions that start out - When you install a new battery.

You aren't installing a new battery - you aren't even talking about a newly recharged battery.

All your doing is saying hey system - this poor pitiful battery that you see - call that new and charge appropriately to where it's at.
That's going to end up being a bad idea. System already undercharges a true new fully charged battery eventually. An already used up battery at some low level - get ready.

 

[Meeka]

Those are the instructions, directly from the owners manual. I tried it that way for several tries, then gave up. Later, I noticed the instructions on a post and the guy added, "after the three brake pedal presses, turn off the ignition, then turn it back on and the battery light will flash 3 times, with the third being two micro pulses". He was right and saved me any further grief over the BMS reset. On a snarky note: If Ford cannot proofread their own print work, do we have even a thin chance that they have play-tested their own software. Really, we are the play-testers and we are looking at drafts 2022 - 2025 of their OS. I routinely helped my kids with their homework, but I never did it for them.

After you do the light flash 5 times, pedal 3, why do you have to turn ignition off then on again? I don’t, just leave it and a few seconds later I get the 3 battery icon flashes. Then lock truck and leave for 8 hrs. or so.

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