Why when ignition is turned off “Check Access System with Elec. Key” prompt?

Hi, my name is Devin. I am an auto repair expert with the Car Genius team here at RepairPal. So sorry to hear you're having trouble with your vehicle. If your ES 350 shows the "Check Access System with Elec. Key" prompt after it was jumped, it may be a residual issue from the battery going flat. This message often appears when the car's electronic systems need to reinitialize after a loss of voltage. Since your key fob functions correctly and the fob battery has been replaced, the prompt might be due to a communication glitch between the key fob and the vehicle's access system. Try disconnecting the car battery for about 10 minutes and then reconnecting it to reset the system. It may also be a good idea to check all fuses. If the message persists, a repair shop may need to reprogram the key fob or check for any lingering issues with the access system. If you need more advice, have any other questions about your vehicle, or would like to get connected to a RepairPal Certified shop near you, we have you covered. Give us a call at 877-913-1554, and we will happily help you out!