Transmission moving forward instead of backward?

2015 TOYOTA CAMRY

265,321 MILES • V6 • 2WD • AUTOMATIC

BLESSING EWOBOR

MEMBER
753 POSTS

Hello,

Good morning, sirs, according to the vehicle's owner, the vehicle was placed in reverse one evening, the vehicle was moving forward instead of backward. It was a great concern. The vehicle was scanned and there were no codes on the transmission. The transmission fluid level and transmission fluid quality were checked, and it was okay. The transmission is U660 transmission. Transmission has been reset.
What could be the cause?

Mar 3, 2023 at 11:55 AM

STRAILER

✓Experienced Mechanic
55,542 POSTS

This transmission is electronically controlled but it could be a valve body issue or the TCN has gone bad, but we should do a CAN scan to see what's going on. You can get a CAN scanner (Controller Area Network) from Amazon.

Here is a video to show you how:

https://youtu.be/u-4syLc-ifQ

and

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

Here is how to change out the TCM in case you need it in the images below.

Images (Click to enlarge)