DTC B15D6: Display Disconnected (Multi Display) [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.

      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  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 > D-SEAT SW > Clear DTCs 

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

   Body Electrical > D-SEAT SW > Trouble Codes 

   OK

   No DTCs are output.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END 

Result: 

NG 

See step  4

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   H7-13 (GND1) - Body ground	Always	Below 1 Ω

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   H7-12 (B) - H7-13 (GND1)	Always*3 Ignition switch off*4	11 to 14 V*1 10.5 to 16 V*2
   H7-24 (ACC) - H7-13 (GND1)	Ignition switch ACC	11 to 14 V*1 10.5 to 16 V*2

   *1: w/o Stop and Start System

   *2: w/ Stop and Start System

   *3: for Gasoline Model

   *4: for HV Model

   Result

   Result	Proceed to
   OK	A
   NG (w/o Stop and Start System)	B
   NG (w/ Stop and Start System)	C

Result: 

B 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

C 

GO TO STOP AND START SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - 10/2022] 

Result: 

A 

See step  5

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
   H8-18 (TX+) - H7-7 (TX+)	Always	Below 1 Ω
   H8-40 (TX-) - H7-19 (TX-)	Always	Below 1 Ω
   H8-18 (TX+) or H7-7 (TX+) - Body ground	Always	10 kΩ or higher
   H8-40 (TX-) or H7-19 (TX-) - 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 multi-display assembly with a new or known good one.

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

2. Clear the DTCs.

   Body Electrical > D-SEAT SW > Clear DTCs 

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

   Body Electrical > D-SEAT SW > Trouble Codes 

   OK

   No DTCs are output.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END 

Result: 

NG 

REPLACE INTEGRATION CONTROL SUB-ASSEMBLY. Refer to  REMOVAL [12/2019 - 10/2022]