Stereo Jack Adapter Light does not Illuminate [10/2018 - 10/2019]: Procedure

1. Disconnect the F121 and F7 No. 1 stereo jack adapter assembly connectors.
2. Measure the voltage according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to No. 1 Stereo Jack Adapter Assembly)

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   F121-1 (UPI) - Body ground	Ignition switch ACC	5 V
   F7-8 (ACC) - Body ground	Ignition switch ACC	11 to 14 V

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE NO. 1 STEREO JACK ADAPTER ASSEMBLY. Refer to  REMOVAL [10/2018 - 07/2022] 

Result: 

NG 

See step  2

1. Disconnect the F115 radio receiver assembly connector.
2. Disconnect the F121 No. 1 stereo jack adapter assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Radio Receiver Assembly)
   *b	Front view of wire harness connector (to No. 1 Stereo Jack Adapter Assembly)

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F121-1 (UPI) - F115-1 (USV1)	Always	Below 1 Ω
   F121-1 (UPI) or F115-1 (USV1) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  3

1. Disconnect the F1 radio receiver assembly connector.
2. Disconnect the F7 No. 1 stereo jack adapter assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F1-16 (ACC) - F7-8 (ACC)	Always	Below 1 Ω
   F1-16 (ACC) or F7-8 (ACC) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE RADIO RECEIVER ASSEMBLY. Refer to  REMOVAL [10/2018 - 10/2019] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR