DTC B15D9: Operation Panel Disconnected [06/2018 - 09/2022]: Procedure

1. If DTC B15D6 is output, perform troubleshooting for DTC B15D6 first.

   Result

   Result	Proceed to
   DTC B15D6 is not output.	A
   DTC B15D6 is output.	B

Result: 

B 

GO TO DTC B15D6. Refer to  DTC B15D6: Display Disconnected [06/2018 - 09/2022]  

Result: 

A 

See step  2

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  5

Result: 

A 

See step  3

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  4

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 (COMMUNICATION MALFUNCTION DUE TO NOISE) 

Result: 

NG 

See step  5

1. Disconnect the G23 air conditioning control assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G23-4 (E) - 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
   G23-16 (+B) - Body ground	Always	11 to 14 V
   G23-7 (ACC) - Body ground	Engine switch on (ACC)	11 to 14 V
   G23-8 (IG+) - Body ground	Engine switch on (IG)	11 to 14 V

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  6

1. Disconnect the G23 air conditioning control assembly connector.
2. Disconnect the G22 multi-display assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G23-1 (TX1+) - G22-6 (TX1+)	Always	Below 1 Ω
   G23-2 (TX1-) - G22-18 (TX1-)	Always	Below 1 Ω
   G23-1 (TX1+) or G22-6 (TX1+) - Body ground	Always	10 kΩ or higher
   G23-2 (TX1-) or G22-18 (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 air conditioning control assembly with a new or known good one.

   Refer to REMOVAL [06/2018 - 08/2021] , or refer to REMOVAL [08/2021 - ]

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 MULTI-DISPLAY ASSEMBLY. Refer to  REMOVAL [06/2018 - 08/2021]  , or refer to  REMOVAL [08/2021 - ]