Prius L4-1.8L (2ZR-FXE) Hybrid (2010)
(b) w/o "Bluetooth" Audio System
(1) Disconnect the navigation ECU connectors.
(2) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
19. AIR CONDITIONING AMPLIFIER
(a) Disconnect the air conditioning amplifier connector.