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

1. Remove the navigation ECU sub-assembly (Refer to REMOVAL [10/2014 - ] ).

   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

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Navigation ECU Sub-assembly)

Result: 

NG 

REPLACE NAVIGATION ECU SUB-ASSEMBLY 

(Refer to REMOVAL [10/2014 - ] )

Result: 

OK 

See step  2

1. Disconnect the I8 navigation ECU sub-assembly connector.
2. Disconnect the E10 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
   E10-8 (TX+) - I8-7 (TX1+)	Always	Below 1 Ω
   E10-7 (TX-) - I8-8 (TX1-)	Always	Below 1 Ω
   E10-8 (TX+) - Body ground	Always	10 kΩ or higher
   E10-7 (TX-) - 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.

   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: 

OK 

REPLACE MALFUNCTIONING PARTS 

Result: 

NG 

REPLACE NAVIGATION ECU SUB-ASSEMBLY 

(Refer to REMOVAL [10/2014 - ] )