DTC B15F8: D-Seat ECU Vehicle Information Reading/Writing Process Malfunction [10/2018 - 10/2019]: Procedure

1. Use the Techstream to check if the CAN communication system is functioning normally.
   • for Gasoline Model:

     Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2018 - 07/2022]

   • for HV Model:

     Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2018 - ]

   OK

   CAN communication DTCs are not output.

   Result

   Result	Proceed to
   OK	A
   NG (for Gasoline Model)	B
   NG (for HV Model)	C

Result: 

B 

GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2018 - 07/2022] 

Result: 

C 

GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2018 - ] 

Result: 

A 

See step  2

1. Check if the front power seat control system (w/ Memory) is malfunctioning.

   Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2018 - 07/2022]

   HINT: 

   Customization may not be possible depending on the malfunction in the front power seat control system (w/ Memory).

   OK

   No malfunctions are present in the front power seat control system (w/ Memory).

   Result

   Proceed to
   OK
   NG

Result: 

NG 

GO TO FRONT POWER SEAT CONTROL SYSTEM (w/ Memory). Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2018 - 07/2022] 

Result: 

OK 

See step  3

1. Display the "Vehicle customization" screen.
2. Make a note of the customizable items for each main body ECU (multiplex network body ECU).

   HINT: 

   The items shown as customizable via the navigation system vehicle customization screen can also be changed using the Techstream. In the following step, the Techstream will be used.

   1. To match-up the items on the multi-display with the items on the Techstream, check the customize parameters list for the front power seat control system (w/ Memory) related items that can be customized via the multi-display screen.

      Refer to CUSTOMIZE PARAMETERS [10/2018 - ]

3. Using the Techstream, check that it is possible to change the settings of the customize parameters that are available for customization via the multi-display screen.

   OK

   The items available for customization via the multi-display screen can be customized successfully using the Techstream.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE RADIO RECEIVER ASSEMBLY. Refer to  REMOVAL [10/2018 - 10/2019] 

Result: 

NG 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  REMOVAL [10/2018 - 07/2022]