Visual Mute Signal Circuit between Radio Receiver and Multi-display [12/2019 - 10/2022]: Procedure

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   H8-39 (VMT1) - Body ground	Ignition switch ACC Screen display changing	3.5 V or higher → Below 1 V → 3.5 V or higher

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component with harness connected (Integration Control Sub-assembly)

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  5

Result: 

OK 

See step  2

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   H7-11 (VMTI) - Body ground	Ignition switch ACC Screen display changing	3.5 V or higher → Below 1 V → 3.5 V or higher

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component with harness connected (Multi-display Assembly)

   Result

   Proceed to
   OK
   NG

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [12/2019 - 10/2022] 

Result: 

NG 

See step  3

1. Disconnect the H8 integration control sub-assembly connector.
2. Disconnect the H7 multi-display assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   H8-17 (VMTR) - H7-11 (VMTI)	Always	Below 1 Ω
   H8-17 (VMTR) or H7-11 (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  4

1. Replace the multi-display assembly with a new or known good one.

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

2. Check that the screen display is normal.

   OK

   Screen display is normal.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END 

Result: 

NG 

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

1. Disconnect the H5 radio receiver assembly connector.
2. Disconnect the H8 integration control sub-assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   H5-1 (VMTF) - H8-39 (VMT1)	Always	Below 1 Ω
   H5-1 (VMTF) or H8-39 (VMT1) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  6

1. Replace the integration control sub-assembly with a new or known good one.

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

2. Check that the screen display is normal.

   OK

   Screen display is normal.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END 

Result: 

NG 

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