Stereo Component Amplifier Power Source Circuit: Procedure

1. Disconnect the stereo component amplifier assembly connector.
   Fig 1: Stereo Component Amplifier Assembly Connector Terminal Identification

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.
   STANDARD RESISTANCE
   
   

   Tester Connection	Condition	Specified Condition
   P27-2 (GND) - Body ground	Always	Below 1 Ω
   P27-6 (GND2) - Body ground	Always	Below 1 Ω

3. Measure the voltage according to the value(s) in the table below.
   STANDARD VOLTAGE
   
   

   Tester Connection	Condition	Specified Condition
   P27-1 (+B) - P27-2 (GND)*2	Always	11 to 14 V
   P27-3 (+B2) - P27-2 (GND)	Always	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Stereo Component Amplifier Assembly)

   • *2: w/ Front Center Speaker

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   2