AVC-LAN Circuit [08/2015 - 08/2019]: Procedure

1. Remove the multi-media module receiver assembly (Refer to REMOVAL [08/2015 - 08/2021] ).

   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
   7 (TX1+) - 8 (TX1-)	Always	60 to 80 Ω
   45 (TX3+) - 46 (TX3-)	Always	60 to 80 Ω

Result: 

NG 

REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY 

(Refer to REMOVAL [08/2015 - 08/2021] )

Result: 

OK 

See step  2

1. Disconnect the H11 multi-media module receiver assembly connector.
2. Disconnect the H27 multi-display assembly connector.
3. Disconnect the I1 parking assist ECU connector.*
   1. *: w/ Side Monitor System
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   H11-45 (TX3+) - H27-7 (TX+)	Always	Below 1 Ω
   H11-46 (TX3-) - H27-19 (TX-)	Always	Below 1 Ω
   H11-7 (TX1+) - I1-11 (TX+)*	Always	Below 1 Ω
   H11-8 (TX1-) - I1-10 (TX-)*	Always	Below 1 Ω
   H11-45 (TX3+) - Body ground	Always	10 kΩ or higher
   H11-46 (TX3-) - Body ground	Always	10 kΩ or higher
   H11-7 (TX1+) - Body ground*	Always	10 kΩ or higher
   H11-8 (TX1-) - Body ground*	Always	10 kΩ or higher

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 operation.

   HINT: 

   • Check all slave units.
   • When disconnecting a slave unit causes the master unit to return to normal operation, this indicates that the slave unit is malfunctioning. Replace the malfunctioning slave unit.

   OK

   Master unit returns to normal operation.

Result: 

OK 

REPLACE MALFUNCTIONING PARTS 

Result: 

NG 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

(Refer to PROBLEM SYMPTOMS TABLE [08/2015 - 08/2019] )