AVC-LAN Circuit [10/2014 - 09/2017]: Procedure

1. Remove the radio receiver assembly.

   Refer to REMOVAL [10/2014 - 09/2017]

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

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE RADIO RECEIVER ASSEMBLY. Refer to  REMOVAL [10/2014 - 09/2017] 

Result: 

OK 

See step  2

1. *: w/ Headup Display

1. Disconnect the I38 radio receiver assembly connector.
2. Disconnect the I42 multi-display assembly connector.
3. Disconnect the J5 combination meter mirror ECU connector*.
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   I38-45 (TX3+) - I42-7 (TX+)	Always	Below 1 Ω
   I38-46 (TX3-) - I42-19 (TX-)	Always	Below 1 Ω
   I42-6 (TX1+) - J5-12 (MPX1)*	Always	Below 1 Ω
   I42-18 (TX1-) - J5-13 (MPX2)*	Always	Below 1 Ω
   I38-45 (TX3+) or I42-7 (TX+) - Body ground	Always	10 kΩ or higher
   I38-46 (TX3-) or I42-19 (TX-) - Body ground	Always	10 kΩ or higher
   I42-6 (TX1+) or J5-12 (MPX1) - Body ground*	Always	10 kΩ or higher
   I42-18 (TX1-) or J5-13 (MPX2) - 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 operation.

   HINT: 

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

   OK

   Master unit returns to normal operation.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE MALFUNCTIONING PARTS 

Result: 

NG 

REPLACE RADIO RECEIVER ASSEMBLY. Refer to  REMOVAL [10/2014 - 09/2017]