AVC-LAN Circuit [06/2018 - 11/2022]: Procedure

1. Remove the radio and display receiver assembly.
2. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component without harness connected (Radio and Display Receiver Assembly)

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   I55-5 (TX1+) - I55-6 (TX1-)	Always	60 to 80 Ω

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY. Refer to  REMOVAL [06/2018 - 01/2019]  , or refer to  REMOVAL [01/2019 - 03/2019]  , or refer to  REMOVAL [03/2019 - 09/2022]  , or refer to  REMOVAL [09/2022 - 11/2022] 

Result: 

OK 

See step  2

1. Disconnect the I55 radio and display receiver assembly connector.
2. Disconnect the I68 stereo component amplifier assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   I68-8 (TX+) - I55-5 (TX1+)	Always	Below 1 Ω
   I68-7 (TX-) - I55-6 (TX1-)	Always	Below 1 Ω
   I68-8 (TX+) or I55-5 (TX1+) - Body ground	Always	10 kΩ or higher
   I68-7 (TX-) or I55-6 (TX1-) - 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 and reconnect each slave unit one by one until the master unit returns to normal.

   HINT: 

   • Check all slave units.
   • If disconnecting a slave unit causes the master unit to return to normal, the slave unit is defective and should be replaced.

   OK

   Master unit returns to normal.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE MALFUNCTIONING PARTS 

Result: 

NG 

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY. Refer to  REMOVAL [06/2018 - 01/2019]  , or refer to  REMOVAL [01/2019 - 03/2019]  , or refer to  REMOVAL [03/2019 - 09/2022]  , or refer to  REMOVAL [09/2022 - 11/2022]