Jump start dead e torque? /Edited my question

[johnhenryculver]

Is it possible to jump start 2026 hemi if the e torque quits working or the battery behind the seat goes bad? I'm not to automotive savvy so i should have added more context to my question. I'm guessing if the e torque goes bad it will most likely lock up due to bearing failure i have been hearing about. In that case engine is inoperable . If the battery system behind the rear seat goes bad, i may be able to jump start truck but since that battery system is not operating properly truck will die as it needs that battery power to keep running?

 

[DanAR]

I would guess it would jump start OK (maybe) but if the eTorque has failed in some way I would guess it will throw all sorts of lights and codes and shut down shortly after disconnecting the jumpers because it can’t charge properly. If you charge the 12 volt battery up first, then it might run a while until the voltage got to low. But that’s more my experience with older cars I collect and not modern, computer controlled stuff.

 

[DanAR]

I suspect the bearing doesn’t typically fail immediately. It’s death is probably preceded by some noise that increases until it completely fails.

 

[mikeru]

Is it possible to jump start 2026 hemi if the e torque quits working or the battery behind the seat goes bad? I'm not to automotive savvy so i should have added more context to my question. I'm guessing if the e torque goes bad it will most likely lock up due to bearing failure i have been hearing about. In that case engine is inoperable . If the battery system behind the rear seat goes bad, i may be able to jump start truck but since that battery system is not operating properly truck will die as it needs that battery power to keep running?

Just to clarify, etorque is a system, not a component. Besides the software which runs it, the system consists of two main components, the 48v battery module and the MGU (Motor/Generator Unit). @DanAR is absolutely correct with his response. If the 48v battery module fails, jump starting it won't get you going because the 12v battery is charged by the 48v battery module. So if either main etorque component fails your truck will be out of commission.

I suspect the bearing doesn’t typically fail immediately. It’s death is probably preceded by some noise that increases until it completely fails.

It's a bearing on a spinning shaft. Those rarely ever just fail immediately with no warning, no matter the application. From the reports I've read there is usually a grinding or moaning noise for some amount of time before the MGU bearing completely fails. So it does give some warning. But the driver needs to be aware of the normal sounds their truck makes so they can notice a new noise. Plenty of people either aren't that in touch with their vehicle or just don't notice it until it's too late.