NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM (for HV Model): B15F8; D-Seat ECU Vehicle Information Reading/Writing Process Malfunction; 2019 - 2022 MY Avalon HV [04/2018

Last Modified: 08-21-2023	6.11:8.1.0	Doc ID: RM100000001BTBM
Model Year Start: 2019	Model: Avalon HV	Prod Date Range: [04/2018 - ]
Title: NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM (for HV Model): B15F8; D-Seat ECU Vehicle Information Reading/Writing Process Malfunction; 2019 - 2022 MY Avalon HV [04/2018 - ]

DTC

B15F8

D-Seat ECU Vehicle Information Reading/Writing Process Malfunction

DESCRIPTION

This DTC is stored when items controlled by the main body ECU (multiplex network body ECU) cannot be customized via the navigation system vehicle customization screen.

HINT:

The main body ECU (multiplex network body ECU) controls the front power seat control system (w/ Memory) related items that are customizable via the radio and display receiver assembly screen.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
B15F8	D-Seat ECU Vehicle Information Reading/Writing Process Malfunction	Main body ECU (multiplex network body ECU) vehicle setting processing malfunction	CAN communication system Front power seat control system (w/ Memory) Main body ECU (multiplex network body ECU) Radio and display receiver assembly

CAUTION / NOTICE / HINT

NOTICE:

Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Navigation System.
Click here
When replacing the radio and display receiver assembly, always replace it with a new one. If a radio and display receiver assembly which was installed to another vehicle is used, the following may occur:
- A communication malfunction DTC may be stored.
- The radio and display receiver assembly may not operate normally.
Before replacing the main body ECU (multiplex network body ECU), refer to Registration.
Click here

PROCEDURE

1.	CHECK CAN COMMUNICATION SYSTEM

(a) Use the Techstream to check if the CAN communication system is functioning normally.

Click here

OK:

CAN communication DTCs are not output.

GO TO CAN COMMUNICATION SYSTEM

2.	CHECK FRONT POWER SEAT CONTROL SYSTEM (w/ Memory)

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

Click here

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).

GO TO FRONT POWER SEAT CONTROL SYSTEM (w/ Memory)

3.	CHECK CUSTOMIZE ITEMS

(a) Display the "Vehicle Customization" screen.

(b) 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 radio and display receiver assembly 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 radio and display receiver assembly screen.

Click here

(c) Using the Techstream, check that it is possible to change the settings of the customize parameters that are available for customization via the radio and display receiver assembly screen.

OK:

The items available for customization via the radio and display receiver assembly screen can be customized successfully using the Techstream.

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)