Toyota Tacoma (2015-2018) Service Manual: Main Body ECU Vehicle Information Reading/Writing Process Malfunction (B15F6)

Toyota Tacoma (2015-2018) Service Manual / Audio / Video / Audio And Visual System / Main Body ECU Vehicle Information Reading/Writing Process Malfunction (B15F6)

DESCRIPTION

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

HINT:

The main body ECU (multiplex network body ECU) controls the items for the following systems that are customizable via the audio and visual system vehicle customization screen:

Power door lock control system
Wireless door lock control system
Lighting system (for Interior)
Lighting system (for Exterior)

DTC No.	DTC Detection Condition	Trouble Area
B15F6	Main body ECU (multiplex network body ECU) vehicle setting processing malfunction	CAN communication system Power door lock control system Wireless door lock control system Lighting system (for Interior) Lighting system (for Exterior) Main body ECU (multiplex network body ECU) Radio and display receiver assembly

PROCEDURE

1.	CHECK CAN COMMUNICATION SYSTEM

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

OK:

CAN communication DTCs are not output.

GO TO CAN COMMUNICATION SYSTEM

2.	CHECK POWER DOOR LOCK CONTROL SYSTEM

(a) Check if the power door lock control system is malfunctioning (See page HINT: ).

HINT:

Customization may not be possible depending on the malfunction in the power door lock control system.

OK:

No malfunctions are present in the power door lock control system.

GO TO POWER DOOR LOCK CONTROL SYSTEM

3.	CHECK WIRELESS DOOR LOCK CONTROL SYSTEM

(a) Check if the wireless door lock control system is malfunctioning (See page with Smart Key System, HINT: without Smart Key System).

HINT:

Customization may not be possible depending on the malfunction in the wireless door lock control system.

OK:

No malfunctions are present in the wireless door lock control system.

Result

Result	Proceed to
OK	A
NG (w/ Smart Key System)	B
NG (w/o Smart Key System)	C

GO TO WIRELESS DOOR LOCK CONTROL SYSTEM (w/ Smart Key System)

GO TO WIRELESS DOOR LOCK CONTROL SYSTEM (w/o Smart Key System)

4.	CHECK LIGHTING SYSTEM (for Interior)

(a) Check if the lighting system (for Interior) is malfunctioning (See page HINT: HINT: ).

HINT:

Customization may not be possible depending on the malfunction in the lighting system (for Interior).

OK:

No malfunctions are present in the lighting system (for Interior).

GO TO LIGHTING SYSTEM (for Interior)

5.	CHECK LIGHTING SYSTEM (for Exterior)

(a) Check if the lighting system (for Exterior) is malfunctioning (See page HINT: HINT: ).

HINT:

Customization may not be possible depending on the malfunction in the lighting system (for Exterior).

OK:

No malfunctions are present in the lighting system (for Exterior).

GO TO LIGHTING SYSTEM (for Exterior)

6.	CHECK CUSTOMIZE ITEMS

(a) Make a note of the customizable items for each main body ECU (multiplex network body ECU) related system.

HINT:

The items shown as customizable via the audio and visual system vehicle customization screen can also be changed using the Techstream. In the following steps, the Techstream will be used.

(1) To match-up the items on the audio and visual system vehicle customization screen with the items on the Techstream, check the customize parameters list for the power door lock control system related items that can be customized via the audio and visual system vehicle customization screen (See page (2) To match-up the items on the audio and visual system vehicle customization ).

(2) To match-up the items on the audio and visual system vehicle customization screen with the items on the Techstream, check the customize parameters list for the wireless door lock control system related items that can be customized via the audio and visual system vehicle customization screen (See page with Smart Key System, (3) To match-up the items on the audio and visual system vehicle customization without Smart Key System).

(3) To match-up the items on the audio and visual system vehicle customization screen with the items on the Techstream, check the customize parameters list for the lighting system (for Interior) related items that can be customized via the audio and visual system vehicle customization screen (See page (4) To match-up the items on the audio and visual system vehicle customization ).

(4) To match-up the items on the audio and visual system vehicle customization screen with the items on the Techstream, check the customize parameters list for the lighting system (for Exterior) related items that can be customized via the audio and visual system vehicle customization screen (See page (b) Using the Techstream, confirm that it is possible to change the settings ).

(b) Using the Techstream, confirm that it is possible to change the settings of the customize parameters that are available for customization via the audio and visual system vehicle customization screen.

OK:

The items available for customization via the audio and visual system vehicle customization screen can be customized successfully using the Techstream.

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

A/C ECU Vehicle Information Reading/Writing Processor Malfunction (B15F5)

DESCRIPTION This DTC is stored when items controlled by the air conditioning amplifier assembly cannot be customized via the audio and visual system vehicle customization screen. HINT: The air co ...

Certification ECU Vehicle Information Reading/Writing Process Malfunction (B15F7)

DESCRIPTION This DTC is stored when items controlled by the certification ECU (smart key ECU assembly) cannot be customized via the audio and visual system vehicle customization screen. HINT: T ...

Other materials:

Diagnosis System
DIAGNOSIS SYSTEM 1. DESCRIPTION (a) When troubleshooting OBD II (On-Board Diagnostics) vehicles, an OBD II scan tool (complying with SAE J1978) must be connected to the DLC3 (Data Link Connector 3) of the vehicle. Various data in the vehicle ECM (Engine Control Module) can be then read. (b) ...

Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each sy ...

System Description
SYSTEM DESCRIPTION 1. BRIEF DESCRIPTION (a) The Controller Area Network (CAN) is a serial data communication system for real time application. It is a vehicle multiplex communication system which has a high communication speed and the ability to detect malfunctions. (b) Using the CANH and C ...