AVC-LAN Circuit [12/2019 - 10/2022]: Procedure

1. Remove the radio receiver assembly.

   Refer to REMOVAL [12/2019 - 10/2022]

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 Receiver Assembly)

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   H6-17 (TX4+) - H6-18 (TX4-)	Always	60 to 80 Ω
   H4-19 (TX+) - H4-20 (TX-)*	Always	60 to 80 Ω

   1. *: w/ Rear Seat Entertainment System

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *A	w/ Rear Seat Entertainment System
   *a	Component without harness connected (Radio Receiver Assembly)

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE RADIO RECEIVER ASSEMBLY. Refer to  REMOVAL [12/2019 - 10/2022] 

Result: 

OK 

See step  2

1. Disconnect the H4* and H6 radio receiver assembly connectors.
2. Disconnect the H8 integration control sub-assembly connector.
3. Disconnect the H7 multi-display assembly connector.
4. Disconnect the R16 television display assembly connector.*
5. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   H6-17 (TX4+) - H8-36 (TX1+)	Always	Below 1 Ω
   H6-18 (TX4-) - H8-35 (TX1-)	Always	Below 1 Ω
   H6-17 (TX4+) or H8-36 (TX1+) - Body ground	Always	10 kΩ or higher
   H6-18 (TX4-) or H8-35 (TX1-) - Body ground	Always	10 kΩ or higher
   H8-18 (TX+) - H7-7 (TX+)	Always	Below 1 Ω
   H8-40 (TX-) - H7-19 (TX-)	Always	Below 1 Ω
   H8-18 (TX+) or H7-7 (TX+) - Body ground	Always	10 kΩ or higher
   H8-40 (TX-) or H7-19 (TX-) - Body ground	Always	10 kΩ or higher
   H4-19 (TX+) - R16-4 (TX+)*	Always	Below 1 Ω
   H4-20 (TX-) - R16-5 (TX-)*	Always	Below 1 Ω
   H4-19 (TX+) or R16-4 (TX+) - Body ground*	Always	10 kΩ or higher
   H4-20 (TX-) or R16-5 (TX-) - Body ground*	Always	10 kΩ or higher

   1. *: w/ Rear Seat Entertainment System

   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 return to normal.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE MALFUNCTIONING PARTS 

Result: 

NG 

REPLACE RADIO RECEIVER ASSEMBLY. Refer to  REMOVAL [12/2019 - 10/2022]