DTC B1AA1-87: UART Communication Between ANC and Audio Amplifier Missing Message [10/2022 - ]: 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 | When the stereo component equalizer assembly detects a UART communication malfunction in the stereo component amplifier assembly for 4 seconds or more continuously 3 seconds after the power switch is turned on (IG)* |
|
HINT:
*: Malfunction monitoring is not performed during the following conditions to prevent erroneous detection.
- The auxiliary battery voltage is less than 9.5 V.
- Before 3 seconds have elapsed after auxiliary battery voltage has returned to normal.