System Malfunction - Trailhunter 5' Hybrid iForceMax - Bad Battery Cell?

[entropy]

For what it's worth, a week after I got my truck I left on a two month trip and kept tabs on my truck through the Toyota app and everything was fine. No issues with the battery.

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[TacoFreak]

Cool - maybe @Lets_Taco_Bout_It's problem is just a bad battery, which the dealer should be able to figure out. I don't need it most of the time, but it would be nice to be able to watch it when you are away.

 

[Lets_Taco_Bout_It]

Apparently the truck is ready to be picked up. I will upload a copy of the service receipt tonight so ya'll can take a look.

 

[Chip]

Just found this out, apparently the day it was delivered to the dealer my trailhunter had a dead battery and im not sure if it was replaced or jumped.

 

[WanderlustTraveler]

Just found this out, apparently the day it was delivered to the dealer my trailhunter had a dead battery and im not sure if it was replaced or jumped.

It looks like they had to jump it, then tested it, found the battery to not meet spec, and replaced it.

 

[Lets_Taco_Bout_It]

Here is the official paperwork from the service department. Thoughts?

@tacorancher
@WKTJR1

 

[TacoFreak]

I might have missed it, but did they do anything to address the brake system control module malfunction? They list it as the root cause of the battery failure, then charged the battery, tested it and replaced it.

A few things I don't understand:

1. Why would a deep discharge kill a relatively new battery?
2. Was anything done to stop that control module from discharging the battery again?
3. Does this mean that we will have to take our trucks in for service when the 12 volt battery dies, so that the tailgate will resume operation?

 

[Lets_Taco_Bout_It]

I might have missed it, but did they do anything to address the brake system control module malfunction? They list it as the root cause of the battery failure, then charged the battery, tested it and replaced it.

A few things I don't understand:

1. Why would a deep discharge kill a relatively new battery?
2. Was anything done to stop that control module from discharging the battery again?
3. Does this mean that we will have to take our trucks in for service when the 12 volt battery dies, so that the tailgate will resume operation?

EXACTLY my thoughts. I'm also curious, which issue was the causation? Was it the dead battery that caused the control module failure or was it the control module failure that caused the dead batter? Lots of unknowns.....if anyone else has any ideas, feel free to chime in.

 

[Vincent907]

The way I read it is that the brake module sensed the drop in voltage, even it may only lasted a nano-second, so it throw a code. My Colorado had the same issue. I hooked up my OBD 2 looking at the live data and the voltage literally dropped for a split second and that caused a code.

 

[tacorancher]

The way I read it is that the brake module sensed the drop in voltage, even it may only lasted a nano-second, so it throw a code. My Colorado had the same issue. I hooked up my OBD 2 looking at the live data and the voltage literally dropped for a split second and that caused a code.

I agree. It’s a safety issue. BCM sensed a drop in voltage and shut everything down. Not sure why the drop to start with though?

 

[Vincent907]

I agree. It’s a safety issue. BCM sensed a drop in voltage and shut everything down. Not sure why the drop to start with though?

Not sure what systems is or will shutdown since no aftermarket service data provider has the 2024 Taco available so we cannot look up the codes and what the cause and effect is. With my Colorado, it'd prevent me from shifting between 2WD to 4WD and vice versa.

 

[rsaxon1135]

After a long weekend, I went to start the truck this morning and was greeted by the warm glow of dashboard warning lights and a cold engine. What's peculiar is that I didn't turn the truck on all weekend. Dropped off the truck this AM (11/4/24). Waiting to get a call back from Burien Toyota.

Got a call from the dealer and they mentioned that according to their diagnosis, they're saying it could be a bad battery cell. I also found out today that you CAN jump start a Hybrid vehicle, and the new method is BRAND new to this generation. There is a dedicated terminal in the fuse box under the hood, even though that isn't where the battery is.

That is why I now have a ‘24 Off Road gas only. Traded in a ‘21 Jeep Rubicon 4XE a few weeks ago. Previous recall resulted in battery being replaced in June after it was dead in the water. There is another new recall for the same thing and mine was wrapped up in it again. They were deemed an “urgent fire risk”. Client of my wife’s had a Jeep Grand Cherokee 4XE and his battery burst into flames going down the interstate. Can’t imagine having little ones in car seats sitting on top of that battery when it blows.

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