What is a Daihatsu Mira L80 airbag control unit?
The Daihatsu Mira L80 airbag control unit is the central safety unit that precisely controls and deploys all occupant restraint systems, such as airbags and seatbelt pretensioners, in the event of an accident. It continuously monitors relevant vehicle sensors, stores important crash data, and ensures the continuous functionality of the entire airbag system for your safety.
This module, also called the SRS control unit, processes signals from various crash and acceleration sensors in the vehicle.
It also contains a non-volatile memory that saves accident-related events and stored error codes that are important for later diagnosis.
The proper functioning of the Daihatsu Mira L80 airbag control unit is crucial for the passive safety of all occupants.
Why is the Daihatsu Mira L80 airbag control unit defective?
A Daihatsu Mira L80 airbag control unit is often defective because it permanently stores crash data after an accident, which activates the airbag warning light and requires a reset or repair. Internal electronic errors such as memory failures (EEPROM errors), communication problems, or unstable power supplies can also lead to failure.
After an airbag deployment, the module is in "crash mode" and must be reset or repaired before reuse.
Internal software errors or self-test malfunctions can also cause the airbag control unit to stop working properly.
An unstable power supply or defective motherboard components can damage the airbag control unit and impair system functionality.
Common error codes for Daihatsu Mira L80 airbag control unit repair
When diagnosing a faulty Daihatsu Mira L80 airbag control unit, specific error codes will appear that directly indicate internal module problems. These codes are crucial for accurately identifying the fault and successfully repairing it, as they should not be confused with sensor or seatbelt pretensioner problems.
- **B1000**: Control unit communication error → Signal transmission to the airbag ECU disturbed → Internal communication error.
- **B1020**: Internal memory error in the airbag control unit → Data in the EEPROM is defective → Damage to the internal memory.
- **B1030**: Airbag control unit internal error – software error → inconsistencies in the module software → programming error or corruption.
- **B1040**: Airbag control unit voltage supply unstable → Insufficient or fluctuating power supply → Electrical problem with the unit.
- **B1100**: Airbag control module error – internal self-test failed → module routine test failed → defective internal components.
- **B1200**: Internal error in the airbag ECU memory (EEPROM error) → Memory unit defective → Permanent damage to the data memory.
- **B1400**: Airbag control unit main board error → board damage → hardware defect in the module.
- **B1600**: Airbag control unit error - unexpected signal fluctuations → irregularities in internal signals → sensitivity or short circuit.
- **B1700**: Control Module Error - Reset Required → Crash data stored or module in trip mode → Requires a professional reset.
These trouble codes are hard errors that typically remain stored in the control unit until a successful repair or reset of the Daihatsu Mira L80 airbag control unit is performed.
What part numbers are available for the Daihatsu Mira L80 airbag control unit repair?
For precise Daihatsu Mira L80 airbag control unit repair, accurately verified OEM part numbers are essential, as they ensure compatibility and proper function. The primary Daihatsu original part number is 89170-B2791, supplemented by the supplier OEM number 150300-7440-93C56, which could also be attributed to Bosch or Autoliv.
The original Daihatsu OEM part number is **89170-B2791** and identifies the specific airbag control unit for the Mira L80.
Another important number is **150300-7440-93C56**, which probably comes from the original supplier, such as Bosch or Autoliv.
These exact part numbers are crucial to ensure the correct airbag control unit repair and replacement for your vehicle.
There are no other validated alternative OEM numbers for this specific control unit from trusted sources.
The importance of Daihatsu Mira L80 airbag control unit repair
Repairing the Daihatsu Mira L80 airbag control unit is a cost-effective and sustainable alternative to purchasing a new one, especially if the module only stored crash data or has internal software errors. A professional reset service restores the system's full functionality without the high cost of a complete replacement.
The ability to reset the airbag control unit after an accident prevents unnecessary new investments and conserves resources.
Specialized services can reset the module to factory settings, clear error codes, and deactivate the airbag warning light.
For some variants, the so-called "MCU modules," the Daihatsu Mira L80 airbag control unit repair may also require chip programming or component replacement.
A professional repair ensures that your security system is fully functional again and passes the rigorous diagnostic test.
Installation position and compatibility of the Daihatsu Mira L80 airbag control unit
The Daihatsu Mira L80 airbag control unit is typically located centrally in the vehicle, usually under the dashboard near the center console or under the driver's seat to ensure optimal signal paths. It is primarily designed for the Daihatsu Mira L80 from the late 1990s to early 2000s, although compatibility with other models requires careful testing.
The central installation position enables short and efficient connections to all associated sensors, airbags and belt pretensioners.
The module has multi-pin connectors for signal and power supply, which must be handled carefully.
Although it was developed for the Mira L80, there may be limited compatibility with similar Daihatsu models based on the same platform.
When repairing the Daihatsu Mira L80 airbag control unit, it is important to consider the exact model variant and year of manufacture, as software versions and equipment features can vary.