What is a Citroën C2 VTS I airbag control unit?
The Citroën C2 VTS I airbag control unit is the central safety unit in the vehicle, responsible for the precise control and monitoring of all passive restraint systems such as airbags and seatbelt pretensioners. It detects the collision in the event of an accident, activates the safety systems instantly, and stores important crash data for diagnosis and repair.
This essential module processes signals from crash and acceleration sensors and initiates airbag deployment in milliseconds. It ensures occupant protection through its extremely rapid response to impact events.
In addition to its deployment function, the airbag ECU continuously monitors the status of the entire SRS system. It identifies potential malfunctions and stores corresponding diagnostic trouble codes.
Why is the Citroën C2 VTS I airbag control unit defective?
The Citroën C2 VTS I airbag control unit can be defective due to internal electronic errors, a short circuit in the system, or an overvoltage that has damaged the sensitive components. After an accident, the control unit also stores crash data, which requires a unit reset to clear the airbag warning light and restore full functionality for safe driving.
Common causes of defects include age-related material fatigue, moisture ingress, or recurring voltage fluctuations in the vehicle electrical system. These factors often lead to damage to the internal memory or microprocessor.
Even untreated minor faults in connected sensors or wiring harnesses can overload the control unit. A serious accident will further lock the unit, preventing further airbag deployment without a reset or replacement.
Common error codes for Citroën C2 VTS I airbag control unit repair
During Citroën C2 VTS I airbag control unit repairs, specific error codes often occur that indicate internal problems or communication failures within the module. These codes diagnose issues such as internal processor defects, EEPROM errors, or power supply malfunctions that impair the safety system's function and activate the airbag warning light.
Correct interpretation of these codes is crucial for a precise diagnosis. Targeted troubleshooting saves time and money in airbag system repairs.
- B1000 → Control unit communication error → The airbag control unit cannot be reached via the diagnostic device.
- B1013 → Internal error in the airbag control unit MCU → A defect in the microcontroller (main processor) of the control unit was detected.
- B1100 → EEPROM memory error in the control unit → The non-volatile memory (EEPROM) of the control unit is damaged or corrupt.
- B1210 → Power supply to control unit interrupted → The electrical power supply to the airbag control unit is insufficient or interrupted.
- B1201 → Airbag control unit self-test failed → The control unit could not successfully complete its internal function test.
- B1122 → Internal error in the airbag control unit (memory) → A general memory defect within the ECU was detected.
- B1080 → Airbag control unit initialization error → The control unit could not be initialized correctly during system startup.
- B1300 → Internal software error control unit → There is an error in the internal software or firmware of the control unit.
What part numbers are available for the Citroën C2 VTS I airbag control unit repair?
For Citroën C2 VTS I airbag control unit repairs, several verified OEM part numbers exist to ensure correct replacement part identification. These include specific Citroën/Peugeot numbers as well as supplier identifications from manufacturers such as Bosch or Continental, which are essential for compatibility with the 1.6 HDi or VTS model and ensure the functionality of the passive safety systems.
Identifying the exact part number is crucial for a successful repair or professional replacement of the defective airbag control unit. Incompatible modules can result in persistent warning lights or malfunctions.
Specialized repair services use these numbers for precise identification to ensure that the repaired or replaced control unit matches the specific vehicle configuration. This accuracy prevents further diagnostic problems and ensures full road safety.
-
Original Citroën/Peugeot part numbers:
- 9649003580
- 9663357780
- 9660855180
-
OEM supplier part number (e.g. Bosch/Continental series):
- 5EKABL0243124W
-
Additional Temic part number relevant for diagnosis/reset:
- 96 615 327 80 (similar to 9661532780)
When repairing the Citroën C2 VTS I airbag control unit, it is recommended to always use the correct part number. This is the only way to ensure the proper functioning of the safety system.