Visual Mute Signal Circuit between Navigation Receiver Assembly and Multi-display [10/2015 - ]: Procedure

1. Choose the model to be inspected.

   Result

   Result	Proceed to
   for 8 Inch Display	A
   for 12.3 Inch Display	B

Result: 

B 

See step  5

Result: 

A 

See step  2

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

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   K52-11 (VMTI) - 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 (Multi-display)

   Result

   Proceed to
   OK
   NG

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [10/2015 - 09/2017]  , or refer to  PROBLEM SYMPTOMS TABLE [09/2017 - ] 

Result: 

NG 

See step  3

1. Disconnect the K57 radio receiver assembly.
2. Disconnect the K52 multi-display connector.
3. Measure the resistance according to the value (s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   K57-10 (VMTF) - K52-11 (VMTI)	Always	Below 1 Ω
   K57-10 (VMTF) or K52-11 (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 with a new or known good one.

   Refer to REMOVAL [10/2015 - ]

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 [10/2015 - 09/2017]  , or refer to  REMOVAL [09/2017 - ] 

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

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   K126-11 (VMTI) - 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 (Accessory Meter Assembly)

   Result

   Proceed to
   OK
   NG

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [10/2015 - 09/2017]  , or refer to  PROBLEM SYMPTOMS TABLE [09/2017 - ] 

Result: 

NG 

See step  6

1. Disconnect the K57 radio receiver assembly.
2. Disconnect the K126 accessory meter assembly connector.
3. Measure the resistance according to the value (s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   K57-10 (VMTF) - K126-11 (VMTI)	Always	Below 1 Ω
   K57-10 (VMTF) or K126-11 (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  7

1. Replace the accessory meter assembly with a new or known good one.

   Refer to REMOVAL [10/2015 - ]

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 [10/2015 - 09/2017]  , or refer to  REMOVAL [09/2017 - ]