What is a Citroën DS5 I airbag control unit?
The Citroën DS5 I airbag control unit is the central safety unit that instantly activates all occupant restraint systems in the event of an accident. It continuously monitors sensors, stores important crash data, and ensures the correct functioning of all airbag modules for maximum safety.
This module works according to the EVA principle by continuously processing data from acceleration and impact sensors.
The system's constant self-diagnosis ensures functional reliability and informs about potential errors via a warning light in the cockpit.
Why is the Citroën DS5 I airbag control unit defective?
A Citroën DS5 I airbag control unit often fails due to internal malfunctions or problems with the CAN bus power supply. Common causes include aging, material fatigue, or overvoltages, which impair system functions and require a prompt Citroën DS5 I airbag control unit repair.
Internal component failures, often diagnosed as "ECU Internal Fault," are a primary cause of control unit failure.
A supply voltage that is too high via the CAN bus can also damage the control unit and disrupt its communication.
Storing crash data after an accident can permanently block the control unit and requires a professional reset or replacement during the Citroën DS5 I airbag control unit repair.
Common error codes for Citroën DS5 I airbag control unit repair
The most common error codes for the Citroën DS5 I airbag control unit indicate internal ECU defects or problems with the CAN bus power supply. These codes are specific to the control unit itself and require a precise diagnosis for a successful Citroën DS5 I airbag control unit repair.
- **B1004 04**: ECU Internal Fault → Indicates an internal fault in the airbag control unit.
- **B1406 01**: ECU Internal Fault → Another code that indicates an internal fault in the airbag control unit.
- **B1400 17**: CAN+ Supply Voltage Fault → Signals an excessively high voltage in the CAN bus supply affecting the airbag ECU.
These error codes are specific to the airbag control unit and do not indicate problems with crash sensors, seat belt pretensioners, or seat occupancy mats.
To accurately diagnose these errors on your Citroën DS5 I, we recommend using specialized diagnostic tools such as Diagbox.
What part numbers are available for the Citroën DS5 I airbag control unit repair?
Several verified OEM and supplier part numbers are available for Citroën DS5 I airbag control unit repairs. These include original Citroën parts as well as compatible replacement parts from leading manufacturers, which guarantee direct interchangeability and are essential for correct parts procurement.
- **9678691780**: Genuine Citroën OEM → This is one of the primary original part numbers for the DS5 I airbag control unit.
- **9677910980**: Genuine Citroën OEM → Another official Citroën part number verified as compatible.
- **A2C53342861**: Supplier (Autoliv), Replacement/Original → This number serves as an OE reference of a supplier that manufactures the same or a compatible control unit.
- **1607123680**: Citroën / Supplier, Alternative → An alternative OEM or replacement number for the same function.
These part numbers have been carefully checked for exact compatibility with the Citroën DS5 I airbag control unit and are intended exclusively for this module.
Using the correct part number is crucial for a precise and safe Citroën DS5 I airbag control unit repair.