WARNING: This page is about a different car, the 2016 Toyota Highlander, 2015 Toyota Highlander, and 2014 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.
CASE 1 AND 4
Monitor runs whenever the following DTCs are not stored
None
Auxiliary battery voltage
8 V or higher
CASE 2 AND 3
Monitor runs whenever the following DTCs are not stored