DTC B15D6: Display Disconnected [03/2017 - 05/2023]: Procedure

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

      Result

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

      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: 

B 

See step  4

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.

   Refer to DTC CHECK / CLEAR [03/2017 - 06/2019] , or refer to DTC CHECK / CLEAR [06/2019 - 04/2020] , or refer to DTC CHECK / CLEAR [04/2020 - 10/2022] , or refer to DTC CHECK / CLEAR [10/2022 - 05/2023]

   Body Electrical > Navigation System > Clear DTCs 

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

   Refer to DTC CHECK / CLEAR [03/2017 - 06/2019] , or refer to DTC CHECK / CLEAR [06/2019 - 04/2020] , or refer to DTC CHECK / CLEAR [04/2020 - 10/2022] , or refer to DTC CHECK / CLEAR [10/2022 - 05/2023]

   Body Electrical > Navigation System > Trouble Codes 

   OK

   No DTCs are output.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END (COMMUNICATION MALFUNCTION DUE TO NOISE) 

Result: 

NG 

See step  4

1. Disconnect the multi-display connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Multi-display)

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   P42-13 (GND1) - 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
   P42-12 (B) - Body ground	Always	11 to 14 V
   P42-24 (ACC) - Body ground	Engine switch on (ACC)	11 to 14 V

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  5

1. Remove the radio receiver assembly.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Refer to REMOVAL [03/2017 - 05/2023]

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   5 (TX1+) - 6 (TX1-)	Always	60 to 80 Ω

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE RADIO RECEIVER ASSEMBLY. Refer to  REMOVAL [03/2017 - 05/2023] 

Result: 

OK 

See step  6

1. Disconnect the P43 radio receiver assembly connector.
2. Disconnect the P42 multi-display connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   P43-5 (TX1+) - P42-7 (TX+)	Always	Below 1 Ω
   P43-6 (TX1-) - P42-19 (TX-)	Always	Below 1 Ω
   P43-5 (TX1+) - Body ground	Always	10 kΩ or higher
   P43-6 (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 multi-display with a new or known good one.

   Refer to REMOVAL [03/2017 - 05/2023]

2. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [03/2017 - 06/2019] , or refer to DTC CHECK / CLEAR [06/2019 - 04/2020] , or refer to DTC CHECK / CLEAR [04/2020 - 10/2022] , or refer to DTC CHECK / CLEAR [10/2022 - 05/2023]

   Body Electrical > Navigation System > Clear DTCs 

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

   Refer to DTC CHECK / CLEAR [03/2017 - 06/2019] , or refer to DTC CHECK / CLEAR [06/2019 - 04/2020] , or refer to DTC CHECK / CLEAR [04/2020 - 10/2022] , or refer to DTC CHECK / CLEAR [10/2022 - 05/2023]

   Body Electrical > Navigation System > Trouble Codes 

   OK

   No DTCs are output.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END (MULTI-DISPLAY IS DEFECTIVE) 

Result: 

NG 

REPLACE RADIO RECEIVER ASSEMBLY. Refer to  REMOVAL [03/2017 - 05/2023]