Code No.B120A Security alarm siren error
| caution | Before replacing the ECU or sensor, ensure that the power supply circuit, the earth circuit and the communication circuit are normal. |
DIAGNOSTIC FUNCTION
- The security alarm siren communicates with the ETACS-ECU by the LIN via the LIN cutoff control unit. The diagnosis code No. B120A is set if the communication data between the ETACS-ECU and security alarm siren has an error when the relay inside the LIN cutoff control unit is ON (alarm is not activated.)