Visual Mute Signal Circuit between Navigation ECU and Multi-display [10/2014 - 09/2017]: Procedure

1. Disconnect the I42 multi-display assembly connector.
2. Disconnect the I38 radio receiver assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   I42-11 (VMTI) - I38-10 (VMTF)	Always	Below 1 Ω
   I42-11 (VMTI) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  2

1. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   I38-10 (VMTF) - Body ground	Engine switch on (ACC), screen display changes	3.5 V or higher → Below 1 V → 3.5 V or higher

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component with harness connected (Radio Receiver Assembly)

   Result

   Proceed to
   OK
   NG

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [10/2014 - 09/2017] 

Result: 

NG 

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