I'm considering buying a '21 Rx hybrid and it will be my first hybrid. I was reading a thread about the Toyota Highlander Hybrid and someone said you're not supposed to use it to jump start other cars. It's not a huge deal but was wondering if this limitation applies to all hybrids or just the Highlander. In particular, I'm wondering if I can jump another car with an Rx hybrid.

Thanks.

 

That's a good question I would like to know the answer to also, though I'm thinking it should not be an issue?

 

The manual of my wifes RAV states "The exclusive jump starting terminal is to be used when charging the 12-volt
battery from another vehicle in an emergency. It cannot be used to jump start another vehicle." The cold cranking of a hybrid battery is around 330 amps and a normal 12 v battery is around 600 to 700.

 

The 12 Volt battery on the RX 459h is located under the floor panel at the back of the vehicle and is not easily accessed. There are "jump start" terminals in the fuse box under the engine/motor hood.
from page 458 of RX450h owner's manual:
To prevent damaging the vehicle. The exclusive jump starting terminal is to used when charging the 12 Volt battery from another vehicle in an emergency. It cannot be used to jump start another vehicle.

 

I jump started my sisters car and nothing bad happened. If you understand what jump starting is and how to do it you will understand that you can't harm your car or the other by doing this.
The only unique thing was I pulled up in front of her to place the jumper cables from my rear end to her front end. Most cars of course require you to either pull up along side or front to front.
I am talking about a battery to battery jump with jumper cables.

 

Maybe the "exclusive jump start" terminal can't be used, but you can definitely use your 12V battery to jump start another car. The two cars are connected to the battery in parallel, it won't hurt your car.

 

If you plan on doing this often, suggest the following:

 

To jump or not to jump another vehicle?

Devhighlander shared this with all:

You FAQ says that a Toyota Hybrid can't safely jumpstart another car. That's not necessarily true. I did it multiple times with my 2005 Prius, and the 12V battery in that car lasted 9 years. They key is to use the jumpstart terminals in the engine compartment, and not at the battery, and the Toyota Hybrid should be in "Ready" mode. At that point, the power being provided to the other car is coming off of the Inverter, not off of the battery. The 12V system is protected by a large fuse (150A in the 2005 Prius' case), so there's likely little to no damage that would be done to the hybrid system if the dead car pulled too much amperage. I was able to jumpstart a Porsche and a really old Volvo without problems.

And this is fine. We have mindful owner familiar with proper jumping procedures and careful in his actions.
That said, my opinion, knowing how much repairs cost: DO AT YOUR OWN RISK.

https://www.toyotanation.com/threads...mping.1549682/

 

Whether you use the Lexus battery terminals or its input terminals in the front they both deliver relatively low amperages compared to the target vehicles required amperages. In other words, the small sized 12 volt system of the Lexus will be at maximum when being connected to the much larger battery of the other vehicle. I would not risk what would happen if the two are connected for a long time. Yes,, if the others vehicle is just barely undercharged it will provide the required current to get the other car started. However, if the other cars battery is close to dead, it might be to much of a drain on the system and overstress the Lexus system. I guess if I was hell bent on giving a jump, I would do it off the battery terminals with its Lexus cables disconnected.

 

This was covered previously...

Jump start with ES300h link

 

No kidding, but they still keep coming