Multi-media Interface ECU Power Source Circuit: Procedure

1. Disconnect the multi-media interface ECU connector.
2. Measure the voltage according to the value(s) in the table below.
   Fig 1: U50 Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   U50-12 (+B) - U50-7 (GND)	Power switch off	11 to 14 V
   U50-11 (ACC) - U50-7 (GND)	Power switch on (ACC)	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Multi-media Interface ECU)

NG → See step   2 

OK → See step   3 

1. Disconnect the display and navigation module display connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   U50-11 (ACC) - K103-11 (ACC)	Always	Below 1 Ω
   U50-12 (+B) - K103-12 (+B)	Always	Below 1 Ω
   U50-7 (GND) - K103-7 (GND)	Always	Below 1 Ω
   U50-11 (ACC) - Body ground	Always	10 kΩ or higher
   U50-12 (+B) - Body ground	Always	10 kΩ or higher
   U50-7 (GND) - Body ground	Always	10 kΩ or higher

3. Proceed to the next step based on the inspection result.

   Result

   Condition	Proceed to
   OK (w/ Navigation System)	A
   OK (w/o Navigation System)	B
   NG	C

B → See step   5 

C → REPAIR OR REPLACE HARNESS OR CONNECTOR 

A → See step   4