False ABS activation?

Do diagnostics on the wheel speed sensors. This is a common cause for the condition you're suffering with. Note they must be installed correctly or weird shit happens.

 

Usually you need a scanner that graphs all four wheel speed signals at the same time.

You'll let it run while driving, and monitor which wheel signal drops out quicker than the other three. That's the corner you have a problem on.

Inspect sensor and tone ring on that corner. If tone ring is ok replace sensor.

 

See the stickied post on this sub forum on rear brakes. Common problem.

https://www.tundras.com/threads/rear-brake-adjustment-theory-and-practice.99575/