AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Gasoline Model with Dual Knob Type): B15F5; Air Conditioner ECU Vehicle Information Reading/Writing Processor Malfunction; 2020 - 2023 MY Corolla Corolla Hatchback GR Corolla [01/2019

Last Modified: 05-13-2024	6.11:8.1.0	Doc ID: RM100000001HE6B
Model Year Start: 2020	Model: GR Corolla	Prod Date Range: [01/2019 - 11/2022]
Title: AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Gasoline Model with Dual Knob Type): B15F5; Air Conditioner ECU Vehicle Information Reading/Writing Processor Malfunction; 2020 - 2023 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 11/2022]

DTC

B15F5

Air Conditioner ECU Vehicle Information Reading/Writing Processor Malfunction

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 conditioning amplifier assembly controls the air conditioning system related items that are customizable via the audio and visual system vehicle customization screen.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
B15F5	Air Conditioner ECU Vehicle Information Reading/Writing Processor Malfunction	Air conditioning amplifier assembly vehicle setting processing malfunction	CAN communication system Air conditioning system Air conditioning amplifier assembly 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 Audio and Visual 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.

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 AIR CONDITIONING SYSTEM

(a) Check if the air conditioning system is malfunctioning.

for Automatic Air Conditioning System: Click here

for Manual Air Conditioning System: Click here

HINT:

Customization may not be possible depending on the malfunction in the air conditioning system.

OK:

No malfunctions are present in the air conditioning system.

GO TO AIR CONDITIONING SYSTEM

for Automatic Air Conditioning System: Click here

for Manual Air Conditioning System: Click here

3.	CHECK CUSTOMIZE ITEMS

(a) Make a note of the customizable items for the air conditioning 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 step, 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 air conditioning system related items that can be customized via the audio and visual system vehicle customization screen.

for Automatic Air Conditioning System: Click here

for Manual Air Conditioning System: Click here

(b) Using the Techstream, check 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 AIR CONDITIONING AMPLIFIER ASSEMBLY