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.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   E77-12 (+B) - E77-7 (GND)	Always	11 to 14 V
   E77-11 (ACC) - E77-7 (GND)	Ignition switch ACC	11 to 14 V

NG → See step   3 

OK → See step   4 

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E77-11 (ACC) - E79-11 (ACC)	Always	Below 1 Ω
   E77-12 (+B) - E79-12 (+B)	Always	Below 1 Ω
   E77-7 (GND) - E79-7 (GND)	Always	Below 1 Ω
   E77-11 (ACC) - Body ground	Always	10 kΩ or higher
   E77-12 (+B) - Body ground	Always	10 kΩ or higher
   E77-7 (GND) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   2