Toyota Yaris: Active Noise Control System / ANC ECU Audio Amplifier Integrated Circuit (B1AA000,B1AA044)

Toyota Yaris XP210 (2020-2025) Reapir and Service Manual / Audio & Visual & Telematics / Audio / Video / Active Noise Control System / ANC ECU Audio Amplifier Integrated Circuit (B1AA000,B1AA044)

DESCRIPTION

This DTC are stored when a malfunction occurs in the stereo component equalizer assembly.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
B1AA000	ANC ECU Audio Amplifier Integrated Circuit	Stereo component equalizer assembly malfunction	Stereo component equalizer assembly
B1AA044	ANC ECU EEPROM Data Memory Failure	Stereo component equalizer assembly malfunction	Stereo component equalizer assembly

PROCEDURE

CLEAR DTC

(a) Clear the DTCs.

Body Electrical > Active Noise Control > Clear DTCs

2.	CHECK FOR DTC

(a) Check for DTCs.

Body Electrical > Active Noise Control > Trouble Codes

Result	Proceed to
DTC B1AA000 and B1AA044 are not output	A
DTC B1AA000 and B1AA044 are output	B

USE SIMULATION METHOD TO CHECK

REPLACE STEREO COMPONENT EQUALIZER ASSEMBLY

Diagnostic Trouble Code Chart

D..

Front Left Microphone Circuit Component Internal Failure (B1AA296,B1AA31C)

DESCRIPTION These DTCs are stored when a malfunction occurs in the active noise control microphone LH system. DTC No. Detection Item DTC Detection Condition Trouble Area B1AA296 Front Left Microphone Circuit Component Internal Failure Stereo component equalizer assembly detects malfunction in active noise control microphone LH for 4 seconds or more continuously when engine speed is 1200 rpm or more* Harness or connector Active noise control microphone LH Stereo component equalizer assembly B1AA31C Front Left Microphone Circuit Circuit Voltage Out of Range Stereo component equalizer assembly detects active noise control microphone LH connection malfunction for 4 seconds or more continuously* Harness or connector Active noise control microphone LH Stereo component equalizer assembly HINT: *: Malfunction monitoring is not performed under the following conditions, in order to prevent erroneous detection...

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