Toyota Yaris: 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 | 0 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* |
|
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
| 1. | 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 |
| A |
 | 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.
(c) Measure the resistance according to the value(s) in the table below.
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 |
| NG |
 | 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.
(c) Measure the resistance according to the value(s) in the table below.
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 |
| NG |
 | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 5. | INSPECT FRONT NO. 1 SPEAKER ASSEMBLY RH |
Click here
OK:
Malfunction disappears.
| NG |
 | REPLACE FRONT NO. 1 SPEAKER ASSEMBLY RH |
|
| 6. | INSPECT FRONT NO. 2 SPEAKER ASSEMBLY RH |
Click here
OK:
Malfunction disappears.
| OK |
 | REPLACE STEREO COMPONENT EQUALIZER ASSEMBLY |
| NG |
 | 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...
Other information:
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Turning the Engine Off
Stop the vehicle completely. Manual transaxle: Shift into neutral and set the parking brake.Automatic transaxle: Shift the selector lever to the P position and set the parking brake.
Press the push button start to turn off the engine. The ignition position is off.