Is it OK to use my IS250 to jump start another vehicle without damage to the computer ?

 

I dont see why not, Ive used my is to jump my friends car when needed.

 

Meh, you're taking a chance every time you jump someone off. Modern vehicles have very sensitive electronics, and even during a jump one could experience electrical issues there after.

 

It Would Be Fine If You Know What You Are doing. One in a while, someone ask for help for connect jump start in reverse causing damage to main fuse. Not mention about electronic problem from the other car could cause problem to your car as well