2017 TOYOTA RAV4 Battery Replacement, some symptoms and testing, AWD System Malfunction
Engine would not start, displaying the warning "AWD System Malfunction 2WD Mode Engaged". This happened a couple of times. After jump starting it, it was ok for a few days but it happened again, and later that day the car would not start again. Had the battery tested by Auto Parts store before I did the "testing" myself. Remember to take all the necessary safety precautions if you decide to do something like this by yourself, because you will be doing it at your own risk.