Lexus ES: ANC ECU EEPROM Data Memory Failure (B1AA044)

Lexus ES (XZ10) Service Manual / Audio & Visual & Telematics / Audio / Video / Active Noise Control System(for Hv Model) / ANC ECU EEPROM Data Memory Failure (B1AA044)

DESCRIPTION

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

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
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

OK:

No DTCs are output.

USE SIMULATION METHOD TO CHECK

REPLACE STEREO COMPONENT EQUALIZER ASSEMBLY

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Terminals Of Ecu

TERMINALS OF ECU NOTICE: Turning the power switch on (IG) with connectors disconnected may cause DTCs to be stored. Make sure to clear the DTCs after inspection has been performed. Do not apply excessive force to the millimeter wave radar sensor assembly connector. CHECK MILLIMETER WAVE RAD

Disassembly

DISASSEMBLY PROCEDURE 1. REMOVE CLUTCH DRUM OIL SEAL RING (a) Remove the 4 clutch drum oil seal rings from the stator shaft assembly. NOTICE: Do not expand the gap of the clutch drum oil seal rings excessively. 2. REMOVE OIL STRAINER ASSEMBLY (a) Using a T30 "TORX" socket wrench, r

Lexus ES: ANC ECU EEPROM Data Memory Failure (B1AA044)

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Terminals Of Ecu

Disassembly