Multi-media Interface ECU Power Source Circuit: Procedure

1. Disconnect the E82 multi-media interface ECU connector.
2. Measure the voltage according to the value(s) in the table below.
   Fig 1: Inspecting Multi-Media Interface ECU

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   E82-12 (+B) - E82-7 (GND)	Always	11 to 14 V
   E82-11 (ACC) - E82-7 (GND)	Ignition switch ACC	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Multi-media interface ECU)

NG → See step   2 

OK → See step   3 

1. Disconnect the E84 radio receiver assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E82-11 (ACC) - E84-11 (ACC)	Always	Below 1 Ω
   E82-12 (+B) - E84-12 (+B)	Always	Below 1 Ω
   E82-7 (GND) - E84-7 (GND)	Always	Below 1 Ω
   E82-11 (ACC) - Body ground	Always	10 kΩ or higher
   E82-12 (B+) - Body ground	Always	10 kΩ or higher
   E82-7 (GND) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   3