DTC B1AA1-87: UART Communication Between ANC and Audio Amplifier Missing Message [06/2018 - 09/2022]: Description
This DTC is stored when an UART communication error occurs between the stereo component equalizer assembly and stereo component amplifier assembly.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| B1AA1-87 | UART Communication Between ANC and Audio Amplifier Missing Message | Stereo component equalizer assembly detects a UART communication malfunction in stereo component amplifier assembly for 4 seconds or more continuously* |
|
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.