I apologize in advance for the long question. I want to make sure I'm as detailed as possible.
Today I discovered my Toyota 2009 Venza completely dead (kids left the rear passenger lights on... I haven't driven the car for 4 days after) unable to unlock the door with my keyless entry, used the key to unlock the door.
I had to put the car in (N)eutral to roll down my driveway in order to position the jumper cables to reach. My brakes were not engaging so I had to use my emergency brakes to slowly bring the car down.
I left the cables hooked up to the running car for about 5 minutes until I was able to start the Venza. I allowed my car to continue to run for about 10mins more before driving around the block. When I shift to (R)everse the car moved just fine... Brakes works as well. When I shift to (D)rive, the car moves, but unable to accelerate. Speedometer stays at 0 when shifting to R, D, And S (see screen shot)
I pulled over, parked my car, kept it running... Noticed the car made a few beeping sounds ... I looked at the dash, discovered the check engine light AND Hill assistant appear (see screen shot)
I parked the car, checked all the fuses ... All is good.
I checked the user manual, YouTube, Google, and this forum looking for answers. Nothing worked. See below for my efforts.
Idle reset/relearn throttle by turning off and on the car 2x, start the engine, put on the ebrake, shift down to D for 5mins. - attempt to accelerate, FAILED
Disabled TRAC and VSC by holding down the traction button (both icons appeared on the dash as OFF, shift down to D - attempt to accelerate, FAILED
Checked all fuses and made sure all fuses are in position, good and nothing blown. Turned car back on... shift down to D - attempt to accelerate, FAILED
Able to get the car back on the driveway, duplicate the Hill assistant icon on the dash... Turned car back on... shift down to D - attempt to accelerate, FAILED
Disconnect battery cables, cleaned post, reconnect the battery to make sure the post have a good contact... Turned car back on... shift down to D - attempt to accelerate, FAILED
Thank you, Christine.