Stereo Component Amplifier Power Source Circuit [08/2015 - 08/2021]: Procedure

1. Disconnect the stereo component amplifier assembly connectors.

   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
   H21-3 (GND) - Body ground	Always	Below 1 Ω
   H21-18 (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
   H21-1 (+B) - H21-3 (GND)	Always	11 to 14 V
   H21-16 (+B2) - H21-3 (GND)	Always	11 to 14 V
   H22-12 (ACC) - H21-3 (GND)	Engine switch on (ACC)	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

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

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

(Refer to PROBLEM SYMPTOMS TABLE [08/2015 - 08/2019] , or refer to PROBLEM SYMPTOMS TABLE [08/2019 - 08/2021] )

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR