Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Rear Center Microphone Circuit Component Internal Failure (B1AAA96,B1AAB1C)

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Audio, Visual, Telematics / Audio / Video / Active Noise Control System / Rear Center Microphone Circuit Component Internal Failure (B1AAA96,B1AAB1C)

DESCRIPTION

These DTCs are stored when a malfunction occurs in the No. 3 active noise control microphone system.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
B1AAA96	Rear Center Microphone Circuit Component Internal Failure	Stereo component equalizer assembly detects malfunction in No. 3 active noise control microphone for 4 seconds or more continuously when engine speed is 1200 rpm or more*	Harness or connector No. 3 active noise control microphone Stereo component equalizer assembly
B1AAB1C	Rear Center Microphone Circuit Circuit Voltage Out of Range	Stereo component equalizer assembly detects No. 3 active noise control microphone connection malfunction for 4 seconds or more continuously*	Harness or connector No. 3 active noise control microphone Stereo component equalizer assembly

HINT:

*: Malfunction monitoring is not performed under the following conditions, in order to prevent erroneous detection.

After engine switch is turned on (ACC) for 3 seconds or more.
After the battery voltage returns to normal for 3 seconds.
Before 3 seconds have elapsed after battery voltage has returned to normal.

WIRING DIAGRAM

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:

DTC B1AAA96 and B1AAB1C are not output.

USE SIMULATION METHOD TO CHECK

3.	CHECK HARNESS AND CONNECTOR (STEREO COMPONENT EQUALIZER ASSEMBLY - NO. 3 ACTIVE NOISE CONTROL MICROPHONE)

(a) Disconnect the G68 stereo component equalizer assembly connector.

(b) Disconnect the O15 No. 3 active noise control microphone connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
G68-5 (MC3+) - O15-1 (MC3+)	Always	Below 1 Ω
G68-19 (MC3-) - O15-2 (MC3-)	Always	Below 1 Ω
G68-5 (MC3+) or O15-1 (MC3+) - Body ground	Always	10 kΩ or higher
G68-19 (MC3-) or O15-2 (MC3-) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.	REPLACE NO. 3 ACTIVE NOISE CONTROL MICROPHONE

(a) Replace the No. 3 active noise control microphone with a new or known good one.

Click here

CLEAR DTC

(a) Clear the DTCs.

Body Electrical > Active Noise Control > Clear DTCs

6.	CHECK FOR DTC

(a) Check for DTCs.

Body Electrical > Active Noise Control > Trouble Codes

OK:

DTC B1AAA96 and B1AAB1C are not output.

END (NO. 3 ACTIVE NOISE CONTROL MICROPHONE IS DEFECTIVE)

REPLACE STEREO COMPONENT EQUALIZER ASSEMBLY

Front Right Microphone Circuit Component Internal Failure (B1AA696,B1AA71C)

Data List / Active Test

See More:

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UTILITY MIRROR POSITION INITIALIZATION HINT: Use this procedure to return the display of the headup display to its initial position. (a) Connect the Techstream to the DLC3. (b) Turn the power switch on (IG). (c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / Head Up Display ...

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Rear Center Microphone Circuit Component Internal Failure (B1AAA96,B1AAB1C)

Front Right Microphone Circuit Component Internal Failure (B1AA696,B1AA71C)

Data List / Active Test

See More:

Toyota Avalon (XX50) 2019-2022 Owners Manual

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual