B1000: Unidad de control electrónico (BCM/SRS) — fallo interno
Unidad de control electrónico (BCM/SRS) — fallo interno: Body Control Module or Supplemental Restraint System controller detected an internal checksum, EEPROM, or voltage supply anomaly.
| Trouble Code (DTC) | B1000 |
|---|---|
| Official SAE Definition | Unidad de control electrónico (BCM/SRS) — fallo interno |
| Vehicle Subsystem | body |
| Driving Severity | MEDIUM |
Observable Symptoms
- Airbag/SRS or Body warning indicator illuminated
- Accessory functions intermittently resetting
Most Probable Root Causes
- Low 12 V battery voltage during cranking causing brown-out
- Water intrusion in footwell BCM connectors
- Internal module memory corruption
Step-by-Step Diagnostic Procedure
- Test 12 V battery health and charging voltage (13.8–14.5 V)
- Clear codes and verify if B1000 returns with stable battery voltage