Toyota Yaris: Active Noise Control System / ANC ECU Audio Amplifier Integrated Circuit (B1AA000,B1AA044)
DESCRIPTION
This DTC are stored when a malfunction occurs in the stereo component equalizer assembly.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| B1AA000 | ANC ECU Audio Amplifier Integrated Circuit | Stereo component equalizer assembly malfunction | Stereo component equalizer assembly |
| B1AA044 | ANC ECU EEPROM Data Memory Failure | Stereo component equalizer assembly malfunction | Stereo component equalizer assembly |
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 B1AA000 and B1AA044 are not output | A |
| DTC B1AA000 and B1AA044 are output | B |
| A |
 | USE SIMULATION METHOD TO CHECK |
| B |
 | REPLACE STEREO COMPONENT EQUALIZER ASSEMBLY |
Front Left Microphone Circuit Component Internal Failure (B1AA296,B1AA31C)
DESCRIPTION These DTCs are stored when a malfunction occurs in the active noise control microphone LH system. DTC No. Detection Item DTC Detection Condition Trouble Area B1AA296 Front Left Microphone Circuit Component Internal Failure Stereo component equalizer assembly detects malfunction in active noise control microphone LH for 4 seconds or more continuously when engine speed is 1200 rpm or more*
Harness or connector
Active noise control microphone LH
Stereo component equalizer assembly
B1AA31C Front Left Microphone Circuit Circuit Voltage Out of Range Stereo component equalizer assembly detects active noise control microphone LH connection malfunction for 4 seconds or more continuously*
Harness or connector
Active noise control microphone LH
Stereo component equalizer assembly
HINT: *: Malfunction monitoring is not performed under the following conditions, in order to prevent erroneous detection...
Other information:
Toyota Yaris XP210 (2020-2026) Reapir and Service Manual: Precaution
PRECAUTION CAUTION REGARDING INTERFERENCE WITH ELECTRONIC DEVICES CAUTION: As weak radio waves are emitted from the electrical key transmitter sub-assembly, if a pacemaker is being used, be sure to read the pacemaker instruction manual and the following...
Toyota Yaris XP210 (2020-2026) Reapir and Service Manual: Terminals Of Ecu
TERMINALS OF ECU CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (a) Disconnect the H46 certification ECU (smart key ECU assembly) connector. (b) Measure the voltage and resistance according to the value(s) in the table below. Tester Connection Terminal Description Condition Specified Condition Related Data List Item H46-29 (E) - Body ground Ground Always Below 1 Ω - H46-6 (+B) - H46-29 (E) Power supply Always 11 to 14 V - H45-22 (CUTB) - H46-29 (E) Dark current cut pin* Ignition switch off 11 to 14 V - *: In order to prevent the vehicle auxiliary battery from being depleted when the vehicle is shipped long distances, a fuse that cuts unnecessary electrical load while the vehicle is being shipped is installed in the circuit...
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Fuel-Filler Lid and Cap
WARNING
When removing the fuel-filler cap, loosen the cap slightly and wait for any hissing to stop, then remove it
Fuel spray is dangerous. Fuel can burn skin and eyes and cause illness if ingested. Fuel spray is released when there is pressure in the fuel tank and the fuel-filler cap is removed too quickly.
