2010 Toyota Highlander Owners Manual - Page 1713

4-3. Do-it-yourself maintenance Fuse Ampere Circuit Multiport fuel injection system/ sequential multiport fuel injection system, electronic throttle control system Air fuel ratio sensor Horn 44 ETCS 10 A 45 46 A/F S-HORN 20 A 7.5 A Type B (if equipped) Fuse 1 2 3 INV-W/P IGCT NO.2 A/C-D Ampere 15 A 7.5 A 10 A No circuit No circuit No circuit Circuit 486