What is a Dacia Logan Preference I airbag control unit?
The Dacia Logan Preference I airbag control unit is the central safety unit that activates all occupant restraint systems in the event of an accident. It monitors sensors, stores crash data, and ensures the proper functioning of all airbag modules and seatbelt pretensioners, which is crucial for the safety of the vehicle's occupants.
This electronic control unit (ECU) acts as the brain of your vehicle's passive safety system. It continuously evaluates signals from various impact sensors installed in the Dacia Logan.
Its primary task is to assess the severity of a collision and, in an emergency, rapidly deploy the appropriate safety devices, such as airbags and seatbelt pretensioners. At the same time, it records important information about the accident.
Why is the Dacia Logan Preference I airbag control unit defective?
The Dacia Logan Preference I airbag control unit often becomes defective or even breaks due to internal components such as the EEPROM memory or microprocessor failing, or due to crash data being permanently stored after an accident. These errors cause the system to fail and activate the airbag warning light in the dashboard.
A common cause of failure is the storage of crash data after an accident, even in minor collisions. This data blocks the control unit's normal function and requires a professional reset for a successful Dacia Logan Preference I airbag control unit repair.
Internal hardware defects, such as those indicated by error codes B1001 to B1004, can also cause malfunctions. Such damage impairs the control unit's ability to communicate or process data properly.
Power supply problems (B1004) or communication errors via the CAN bus (B1000, B1010) are other causes of failure. These errors prevent the control unit from interacting correctly with other vehicle systems.
Common error codes for Dacia Logan Preference I airbag control unit repair
During a Dacia Logan Preference I airbag control unit repair, specific error codes may occur that indicate internal problems or crash data and require a precise diagnosis to resolve the issue. These codes are crucial for understanding the airbag system failure and for troubleshooting it.
The airbag control unit's error codes are essential for identifying the cause of a defect. They provide precise information about internal malfunctions or stored information that may necessitate repair.
Reading these codes is the first step in any airbag control unit diagnosis before a repair or replacement is carried out in the workshop.
- B1000 → Control unit communication error → The airbag control unit cannot communicate correctly with other systems.
- B1001 → Internal memory or EEPROM error → Defect in the non-volatile memory of the control unit.
- B1002 → Internal control unit error (hardware defect) → General malfunction of the internal hardware.
- B1003 → Internal microprocessor error → Failure of the central processing unit in the control unit.
- B1004 → Control unit power supply failed → Insufficient or unstable power supply to the control unit.
- B1010 → Error in CAN bus communication with the airbag control unit → Problems with data transmission via the CAN bus.
- B1020 → Crash data stored in the control unit (Crash Storage) → The control unit has detected an accident and stored relevant data.
- B1021 → Error in the airbag control unit program or software → Defect in the internal software or firmware.
- B1030 → Missing or incomplete initialization of the control unit → The control unit has not been set up or calibrated correctly.
- B1040 → EEPROM calibration error → Error calibrating the memory data in the EEPROM.
- B1050 → Internal watchdog unit malfunction → The control unit monitoring system is faulty.
What part numbers are available for the Dacia Logan Preference I airbag control unit repair?
For the Dacia Logan Preference I airbag control unit repair, two OEM part numbers from Continental/TEMIC are primarily verified, ensuring exact compatibility and are crucial for replacement or repair. These part numbers ensure that the replacement part is true to the original and functional.
Correct identification of the part number is essential for a successful repair or replacement of the airbag control unit. Incorrect parts can lead to compatibility issues and safety risks.
The following original part numbers from Continental/TEMIC have proven to be suitable for the Dacia Logan Preference I:
- 985102122R (Continental, original)
- 8201163278 (Continental/TEMIC, original)
These numbers are verified specifically for the first generation of the Dacia Logan (approx. 2004-2013) and come from reliable sources. No other OEM replacement numbers from Bosch, Siemens, or Autoliv have been confirmed as compatible for this specific model.
A professional workshop will always check the existing part number to ensure compatibility and smooth installation. This is especially important for Dacia Logan Preference I airbag control unit repairs.