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: Identifying Multi-Media Interface ECU J112 Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   J112-12 (+B) - J112-7 (GND)	Always	11 to 14 V
   J112-11 (ACC) - J112-7 (GND)	Engine 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 → PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

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
   J112-11 (ACC) - J104-11 (ACC)	Always	Below 1 Ω
   J112-12 (+B) - J104-12 (+B)	Always	Below 1 Ω
   J112-7 (GND) - J104-7 (GND)	Always	Below 1 Ω
   J112-11 (ACC) - Body ground	Always	10 kΩ or higher
   J112-12 (+B) - Body ground	Always	10 kΩ or higher
   J112-7 (GND) - Body ground	Always	10 kΩ or higher

OK → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   3