Code No.B120C Security alarm siren Flat Battery
| caution | Before replacing the ECU or sensor, ensure that the power supply circuit, the earth circuit and the communication circuit are normal. |
DIAGNOSTIC FUNCTION
| note | The rechargeable battery integrated in the security alarm siren is charged by turning the ignition switch to the ON position. |
TROUBLESHOOTING HINT
- Abnormality in security alarm siren
- Service life of rechargeable battery
- Since the vehicle had been stationary for long time, the rechargeable battery remained uncharged. This reduced voltage.