DTC P0AA4-232: Hybrid Battery Negative Contactor Circuit Stuck Closed [08/2013 - ]: Wiring Diagram
WARNING: This page is about a different car, the 2014 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.
Refer to the wiring diagram for DTC P0AE6-225. Refer to WIRING DIAGRAM .