Need Help! OTA 2.81 Will not apply

[BMWtoF150]

I have been trying to get OTA 2.81 to apply and it has failed at least a dozen times. I ask Jesse-Infotainment to research the cause and he said it was due to low battery voltage. I connected a 10 amp battery charger/tender in supply mode and was getting 13 volts across the battery terminals.

This did not help. After about 15 minutes it continues to fail.

Anyone got any ideas?

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[JFR0317]

Be sure to set your parking brake. I wasn't getting 2.5.1 to go through until the Ford OTA team advised me it needed to be set for the update to proceed. 2.8.1 is the functional equivalent to 2.5.1 but with the new numbering scheme.

 

[BMWtoF150]

Be sure to set your parking brake. I wasn't getting 2.5.1 to go through until the Ford OTA team advised me it needed to be set for the update to proceed. 2.8.1 is the functional equivalent to 2.5.1 but with the new numbering scheme.

Thanks, I'll try that tomorrow. I have had enough of this today.

 

[Jesse-Infotainment]

 

[BMWtoF150]

ok, so does this mean I need a new battery to get this to apply?

 

[Jesse-Infotainment]

I was posting it because I gave you the reason it was failing according to ford. In the calculations they determined the voltage drop to be too much for the update to complete. This is the single LARGEST OTA ford has released and takes 3 hours. THey are determining the battery voltage with be insufficient to complete in the required time. SO yes I would think the battery would be the issue. You cant go based on voltage. Voltage is not the important issue. the current draw required during the update will drop the battery to an unsafe level .

I would suggest you leave the charger on for a while maybe even overnight. See what happens. that or buy a new battery. I had to very early on Ford seemed to have a batch of bad batteries in these early truck. Trucks start fine and hold voltage but the amp hours seem to be insufficient.

 

[JEB]

I have been trying to get OTA 2.81 to apply and it has failed at least a dozen times. I ask Jesse-Infotainment to research the cause and he said it was due to low battery voltage. I connected a 10 amp battery charger/tender in supply mode and was getting 13 volts across the battery terminals.

This did not help. After about 15 minutes it continues to fail.

Anyone got any ideas?

Power supply mode won’t help if you are starting with a depleted battery. To your truck’s on board systems, it still thinks you have a dead battery. Try putting your battery on the charger in standard charge mode overnight and let your battery recharge normally.

 

[BMWtoF150]

I just checked the amps on the battery and it was 37.4 THe battery rated at 70ah, so that means the battery is at 53.4% charge.

 

[Sbdavis1]

Not sure if you can find answers from higher powers than Jesse… Godspeed.

 

[JEB]

I just checked the amps on the battery and it was 37.4 THe battery rated at 70ah, so that means the battery is at 53.4% charge.

You definitely need to put the battery on the charger in charge mode and give it several hours to recharge fully. If it’s a smart charger, you might be able to revive it. The problem with power supply mode is that it tries to supply a constant amperage to meed loads but it allows voltage to float. So, when you put a load on the system, the charger gives you the amps, but the BMS on your truck still sees a low voltage and starts shutting things down.

You need to get the voltage on the battery up to keep the BMS happy. That’s where standard charge mode does it‘s business. It operates to keep voltage constant by allowing amps to float.

For programming you need both adequate voltage—to keep the BMS happy—and adequate amps—to power the programming loads. That’s why you always need to start with a fully charged battery. Once the battery is fully charged, you can then switch to power supply mode to do the programming. But you can’t start with a depleted battery and then expect the charger to compensate for it. It doesn’t work that way.

 

[maxinike]

like said before the power supply will charge the batterie but won't change the state of charge in BCM. That is what the process of programming look for before programming a module. You will need a slow charge for several hours(min8 hrs) with negative charger cable connected to vehicle chassis for the bms to read the power going to the batterie and update the state of charge. You can also reset it after the charge and let the vehicle sit overnight and see if the SOC stay above 80%. If not or it drop, the batt is not good or you have a batterie drain issue. Best SOC for successful programming is when above 80-85%. If its a Powerboost with auxiliary batterie, charge both batteries separately . Same thing happen if you do the update manually on fdrs. Update will fail if batteries or SOC is too low.

 

[jricca]

My 2.8.1 update has been failing time and time again. I just put it all together last night because my auto start/stop has not been active for a while. Culprit is my dashcam recently has not been shutting off. It is draining my battery, not severely, but low enough that it is below the auto start/stop threshold. Sure enough I unplugged the dashcam last night and put on the battery tender. Auto Start/Stop worked this morning at my first stop sign. I've put two and two together and believe the low battery was also causing the update to not install. I will now update the software on demand today and expect it will work. I will report back here.

 

[volvofan94]

Maybe a silly suggestion, but do you have a window, hood, or tailgate open when the OTA update installation starts?

I had my sliding rear window open when the 2.8.1 OTA update tried to install the first time. Closed it before my next scheduled update time and now I'm on version 2.8.1.

 

[BMWtoF150]

My update to 2.8.1 failed many times due to insufficient charge level. I finally put it on a charger (NOCO 10 amp) for 10 hours and then left it connected over night. That did the trick. If you leave the battery charger connected you have make sure the hood is closed for the update to take place.

 

[jricca]

My 2.8.1 update has been failing time and time again. I just put it all together last night because my auto start/stop has not been active for a while. Culprit is my dashcam recently has not been shutting off. It is draining my battery, not severely, but low enough that it is below the auto start/stop threshold. Sure enough I unplugged the dashcam last night and put on the battery tender. Auto Start/Stop worked this morning at my first stop sign. I've put two and two together and believe the low battery was also causing the update to not install. I will now update the software on demand today and expect it will work. I will report back here.

It worked. While I don't know what all the battery levels were, I've been manually unplugging the usb power going to the dash cam and fully charged the battery with my Battery Tender brand trickle charger. The update installed fine. The dealership was clueless and not helpful. I was there on Thursday for a free oil change and asked them to look into why it was failing. They said it was due to be installed this Saturday. That was not helpful as that was just my preferences that I set for when to do updates. I told them, yeah it is going to try to install again on Saturday but it already failed about 5 times.

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