What is a Daihatsu Mira L250 airbag control unit?
The Daihatsu Mira L250 airbag control unit is the central safety unit in the vehicle, activating all occupant restraint systems, such as airbags and seatbelt pretensioners, in the event of an accident. It continuously monitors the sensors, stores relevant crash data, and ensures the correct functioning of the entire Supplemental Restraint System (SRS).
This module processes real-time data from acceleration sensors and is crucial for occupant protection. It was developed specifically for the vehicle architecture of the Daihatsu Mira L250.
The control unit continuously communicates with the vehicle's electrical system and performs self-diagnostics. System errors are detected and reported via corresponding codes.
Why is the Daihatsu Mira L250 airbag control unit defective?
The Daihatsu Mira L250 airbag control unit is often defective because irreversible crash data is stored after an accident, requiring reprogramming. Internal memory failures, voltage spikes, or hardware defects can also cause the module to no longer function properly, necessitating repair.
A primary cause of failure is the storage of "hard codes" or crash data after airbag deployment. These prevent the system from being restarted until they are erased.
Age-related wear and tear or electrical problems in the vehicle can also cause internal errors in the microcontroller (MCU) or the control unit's EEPROM memory. A professional Daihatsu Mira L250 airbag control unit repair can remedy this.
Power supply malfunctions or incorrect configuration of the airbag module can also indicate a defect. This often requires detailed diagnosis and repair at a specialized workshop.
Common error codes for Daihatsu Mira L250 airbag control unit repair
During Daihatsu Mira L250 airbag control unit repairs, specific error codes often occur that directly affect the control unit itself and indicate internal problems such as communication failures, memory defects, or hardware malfunctions. These codes require specialized reset services to restore the system.
Some of the most common error codes that require an airbag control unit repair for the Daihatsu Mira L250 are:
- B1000 → Control unit communication error → Signal loss or faulty connection of the airbag module.
- B1100 → Internal memory error in the ECU → Damaged or corrupted crash data in the EEPROM.
- B1200 → Power supply error → Insufficient or unstable power supply to the control unit.
- B1235 → Airbag control module internal error → Generic hardware or software error in the module.
- B1400 → Control unit configuration invalid → Incorrect or missing calibration data.
- B1500 → Internal hardware error → Physical damage to the internal components of the ECU.
These OBD-II error codes, beginning with "B" (body codes), typically indicate problems with the control unit itself. They differ from sensor or seat belt pretensioner errors, which often have separate codes.
After an accident, hard codes are often stored in the vehicle's memory that can only be removed by a specialized reset service. A simple OBD-II scanner isn't sufficient for this.
What part numbers are available for the Daihatsu Mira L250 airbag control unit repair?
For Daihatsu Mira L250 airbag control unit repair, the only precisely verified OEM part number is 89170-B2791, which comes directly from Daihatsu. Other manufacturer or replacement part numbers from suppliers such as Bosch or Continental could not be reliably confirmed for this specific airbag module.
Part number 89170-B2791 is the primary identification for the airbag control unit in the Daihatsu Mira L250 series. It identifies the original spare part from the vehicle manufacturer.
When researching official catalogs and professional databases, no other OEM part numbers from third-party suppliers such as Autoliv, Siemens, or similar could be validated for this specific control unit. This underscores the uniqueness of the Daihatsu number.
Repairing is often more cost-effective than buying a new one, even if only that single part number is relevant. A professional repair shop can identify and repair the defective module using that number.