Toyota Yaris: Active Noise Control System / Rear Door Right Speaker Circuit Actuator Stuck (B1AB271)
DESCRIPTION
This DTC is output when a malfunction occurs in the right side rear speaker system.
DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
B1AB271 | Rear 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 rear speaker system* | -
Harness or connector
-
Rear 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
(a) Clear the DTCs.
Body Electrical > Active Noise Control > Clear DTCs
NEXT |
| |
(a) Check for DTCs.
Body Electrical > Active Noise Control > Trouble Codes
Result | Proceed to |
DTC B1AB271 is not output | A |
DTC B1AB271 is output | B |
A |
| USE SIMULATION METHOD TO CHECK |
B |
| |
3. | CHECK HARNESS AND CONNECTOR (REAR SPEAKER ASSEMBLY RH - STEREO COMPONENT EQUALIZER ASSEMBLY) |
(a) Disconnect the O115 rear 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 |
O115-2 - O131-10 (RR+) | Always | Below 1 Ω |
O115-1 - O131-25 (RR-) | Always | Below 1 Ω |
O115-2 - Body ground | Always | 10 kΩ or higher |
O115-1 - Body ground | Always | 10 kΩ or higher |
NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
| |
4. | INSPECT REAR SPEAKER ASSEMBLY RH |
Click here
OK:
Malfunction disappears.
OK |
| REPLACE STEREO COMPONENT EQUALIZER ASSEMBLY |
NG |
| REPLACE REAR SPEAKER ASSEMBLY RH |
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...
DESCRIPTION This DTC is output when a malfunction has occurred in the engine pulse signal system from the ECM. DTC No. Detection Item DTC Detection Condition Trouble Area P033531 Crankshaft Position Sensor "A" No Signal Stereo component equalizer assembly detects malfunction in engine pulse signal system for 10 seconds or more continuously when engine speed is between 500 and 6000 rpm*
Harness or connector
ECM
Stereo component equalizer assembly
HINT: *: Malfunction monitoring is not performed under the following conditions, in order to prevent erroneous detection...
Other information:
DESCRIPTION When an open or short circuit is detected in the transponder key amplifier coil built into the engine switch, the certification ECU (smart key ECU assembly) stores this DTC. This DTC is also stored as a history DTC. DTC No. Detection Item DTC Detection Condition Trouble Area Note B27841C Antenna Coil Circuit Voltage Out of Range The transponder key amplifier coil built into the engine switch is open (see below) or shorted (determined by communication with certification ECU (smart key ECU assembly))...
COMPONENTS ILLUSTRATION
*1 MANUAL TRANSAXLE ASSEMBLY *2 TRANSFER ASSEMBLY *3 TRANSFER AND TRANSAXLE SETTING STUD BOLT - -
Tightening torque for "Major areas involving basic vehicle performance such as moving/turning/stopping" : N*m (kgf*cm, ft...
Categories
![Toyota Yaris. Keys](images/books/1/toyota_yaris_keys_71.jpg)
Smart key
Auxiliary key
Key code number plate
To use the auxiliary key, press the knob and pull out the auxiliary key
from the smart key.
![Toyota Yaris. Keys](images/books/1/toyota_yaris_keys_72.jpg)
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