Toyota Yaris: Active Noise Control System / Front Door Right Speaker Circuit Actuator Stuck (B1AAF71)

Toyota Yaris XP210 (2020-2026) Reapir and Service Manual / Audio & Visual & Telematics / Audio / Video / Active Noise Control System / Front Door Right Speaker Circuit Actuator Stuck (B1AAF71)

DESCRIPTION

This DTC is output when a malfunction occurs in the right side front speaker system.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
B1AAF71	Front Door Right Speaker Circuit Actuator Stuck	When starting the system from IG OFF → ACC ON, the stereo component equalizer assembly detects a malfunction in the right side front speaker system*	Harness or connector Front No. 1 speaker assembly RH Front No. 2 speaker assembly RH Stereo component equalizer assembly

HINT:

*: To prevent false positives, fault monitoring is not performed in the following conditions:

Auxiliary battery voltage has decreased to 9.5 V or less.
Less than 3 seconds have elapsed after auxiliary battery voltage 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

Result	Proceed to
DTC B1AAF71 is not output	A
DTC B1AAF71 is output	B

USE SIMULATION METHOD TO CHECK

3.	CHECK HARNESS AND CONNECTOR (FRONT NO. 2 SPEAKER ASSEMBLY RH - STEREO COMPONENT EQUALIZER ASSEMBLY)

(a) Disconnect the H88 front No. 2 speaker assembly RH connector.

(b) Disconnect the O131 stereo component equalizer assembly connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
H88-3 (+) - O131-12 (FR+)	Always	Below 1 Ω
H88-1 (-) - O131-27 (FR-)	Always	Below 1 Ω
H88-3 (+) - Body ground	Always	10 kΩ or higher
H88-1 (-) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.	CHECK HARNESS AND CONNECTOR (FRONT NO. 1 SPEAKER ASSEMBLY RH - FRONT NO. 2 SPEAKER ASSEMBLY RH)

(a) Disconnect the K2 front No. 1 speaker assembly RH connector.

(b) Disconnect the H88 front No. 2 speaker assembly RH connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
K2-2 - H88-4 (TWR+)	Always	Below 1 Ω
K2-1 - H88-2 (TWR-)	Always	Below 1 Ω
K2-2 - Body ground	Always	10 kΩ or higher
K2-1 - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.	INSPECT FRONT NO. 1 SPEAKER ASSEMBLY RH

Click here

OK:

Malfunction disappears.

REPLACE FRONT NO. 1 SPEAKER ASSEMBLY RH

6.	INSPECT FRONT NO. 2 SPEAKER ASSEMBLY RH

Click here

OK:

Malfunction disappears.

REPLACE STEREO COMPONENT EQUALIZER ASSEMBLY

REPLACE FRONT NO. 2 SPEAKER ASSEMBLY RH

Front Door Left Speaker Circuit Actuator Stuck (B1AAE71)

DESCRIPTION This DTC is output when a malfunction occurs in the left side front speaker system. DTC No. Detection Item DTC Detection Condition Trouble Area B1AAE71 Front Door Left Speaker Circuit Actuator Stuck When starting the system from IG OFF → ACC ON, the stereo component equalizer assembly detects a malfunction in the left side front speaker system* Harness or connector Front No...

Rear Door Left Speaker Circuit Actuator Stuck (B1AB071)

DESCRIPTION This DTC is output when a malfunction occurs in the left side rear speaker system. DTC No. Detection Item DTC Detection Condition Trouble Area B1AB071 Rear Door Left Speaker Circuit Actuator Stuck When starting the system from IG OFF → ACC ON, the stereo component equalizer assembly detects a malfunction in the left side rear speaker system* Harness or connector Rear speaker assembly LH Stereo component equalizer assembly HINT: *: To prevent false positives, fault monitoring is not performed in the following conditions: Auxiliary battery voltage has decreased to 9...

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