DTC B15D6: Display Disconnected [12/2019 - 10/2022]: Procedure

1. Check for optional components.
   1. Check that optional components (including associated wiring) which generate radio waves are not installed.

      HINT: 

      • Electrical noise from radio waves generated by optional components or the wiring for those components may affect AVC-LAN communication.
      • This DTC may be stored when an AVC-LAN communication error occurs due to electrical noise.

   Result

   Result	Proceed to
   Optional components (including associated wiring) are installed.	A
   Optional components (including associated wiring) are not installed.	B

Result: 

B 

See step  3

Result: 

A 

See step  2

1. Remove optional components (including associated wiring).
   NOTE:

   Do not remove optional components or associated wiring without the permission of the customer.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  3

1. Clear the DTCs.

   Body Electrical > Navigation System > Clear DTCs 

2. Recheck for DTCs and check that no DTCs are output.

   Body Electrical > Navigation System > Trouble Codes 

   OK

   No DTCs are output.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END 

Result: 

NG 

See step  4

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   H8-20 (GND) - Body ground	Always	Below 1 Ω

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   H8-1 (B) - H8-20 (GND)*1	Ignition switch off	11 to 14 V
   H8-1 (B) - H8-20 (GND)*2	Always	11 to 14 V*3 10.5 to 16 V*4
   H8-3 (ACC) - H8-20 (GND)	Ignition switch ACC	11 to 14 V*3 10.5 to 16 V*4
   H8-4 (IG+) - H8-20 (GND)	Ignition switch ON	11 to 14 V*3 10.5 to 16 V*4

   1. *1: for HV Model
   2. *2: for Gasoline Model
   3. *3: w/o Stop and Start System
   4. *4: w/ Stop and Start System

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  5

1. Disconnect the H6 radio receiver assembly connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component with harness connected (Radio Receiver Assembly)

2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   17 (TX4+) - 18 (TX4-)	Always	60 to 80 Ω

   Result

   Proceed to
   OK
   NG

Result: 

NG 

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

Result: 

OK 

See step  6

1. Disconnect the H6 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
   H6-17 (TX4+) - H8-36 (TX1+)	Always	Below 1 Ω
   H6-18 (TX4-) - H8-35 (TX1-)	Always	Below 1 Ω
   H6-17 (TX4+) or H8-36 (TX1+) - Body ground	Always	10 kΩ or higher
   H6-18 (TX4-) or H8-35 (TX1-) - 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 integration control sub-assembly with a new or known good one.

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

2. Clear the DTCs.

   Body Electrical > Navigation System > Clear DTCs 

3. Recheck for DTCs and check that no DTCs are output.

   Body Electrical > Navigation System > Trouble Codes 

   OK

   No DTCs are output.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END 

Result: 

NG 

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