DTC P0171 System Too Lean (Bank 1); DTC P0172 System Too Rich (Bank 1); DTC P0174 System Too Lean (Bank 2); DTC P0175 System Too Rich (Bank 2); DTC P1170 Port Injector Fuel Performance; DTC P117B Direct Injector Fuel Performance: Wiring Diagram
WARNING: This page is about a different car, the 2008 Lexus IS 350. However, it is still accessible from the selected car via links, so may be relevant.
Refer to DTC P2195 (See WIRING DIAGRAM ).