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

Lexus ES (XZ10) Service Manual / Audio & Visual & Telematics / Audio / Video / Active Noise Control System (for Gasoline 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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Inspection

INSPECTION PROCEDURE 1. INSPECT LUGGAGE DOOR OPENING SWITCH (TRUNK AND FUEL SWITCH ASSEMBLY) (a) Check the switch. (1) Measure the resistance according to the value(s) in the table below. Standard Resistance: Tester Connection Condition Specified Condition 4 (B) - 3 (L) Pressed (On)

Abnormal Zero Point of Steering Angle Sensor (C1290)

DESCRIPTION The skid control ECU (brake booster with master cylinder assembly) acquires the steering angle sensor zero point every time the power switch on (READY) and the vehicle is driven at 35 km/h (22 mph) or more for approximately 5 seconds. The skid control ECU (brake booster with master cylin

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

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Inspection

Abnormal Zero Point of Steering Angle Sensor (C1290)