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

1. Disconnect the stereo component amplifier assembly connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   for 9 Speakers 

   Tester Connection	Condition	Specified Condition
   H21-3 (GND) - Body ground	Always	Below 1 Ω
   H21-18 (GND2) - Body ground	Always	Below 1 Ω

   for 17 Speakers 

   Tester Connection	Condition	Specified Condition
   R31-3 (GND) - Body ground	Always	Below 1 Ω
   R31-18 (GND2) - Body ground	Always	Below 1 Ω

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

   Standard Voltage

   for 9 Speakers 

   Tester Connection	Condition	Specified Condition
   H21-1 (+B) - Body ground	Always	11 to 14 V
   H21-16 (+B2) - Body ground	Always	11 to 14 V

   for 17 Speakers 

   Tester Connection	Condition	Specified Condition
   R31-1 (+B) - Body ground	Always	11 to 14 V
   R31-16 (+B2) - Body ground	Always	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *A	for 9 Speakers
   *B	for 17 Speakers
   *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