What is a Daihatsu Mira LA300 airbag control unit?
The Daihatsu Mira LA300 airbag control unit, also known as the SRS control unit, is the central safety unit in the vehicle that activates all occupant restraint systems, such as airbags and seatbelt pretensioners, in the event of a collision. It continuously monitors relevant sensors and stores critical crash data, ensuring the proper function and safety of all airbag modules in the vehicle system.
This electronic module serves as the brain of the passive safety system and is crucial for occupant protection in the Daihatsu Mira LA300. It is designed to detect and process impact events at lightning speed.
The unit also stores important diagnostic and error messages that can be read out during a Daihatsu Mira LA300 airbag control unit repair.
Why is the Daihatsu Mira LA300 airbag control unit defective?
A Daihatsu Mira LA300 airbag control unit is often defective because it stores crash data after an accident, preventing it from functioning again without a reset. Internal memory errors, such as a faulty EEPROM, can also lead to failures, as the module can then no longer correctly process its configuration or accident information, necessitating urgent Daihatsu Mira LA300 airbag control unit repair.
Common causes of a defect include internal processor problems or faulty self-diagnosis of the module. These internal failures trigger the airbag warning light and impair the functionality of the safety system.
Power supply issues or an inadequate ground connection can also interfere with the control unit. In such cases, a precise diagnosis is essential before repairing the Daihatsu Mira LA300 airbag control unit.
Common error codes for Daihatsu Mira LA300 airbag control unit repair
During a Daihatsu Mira LA300 airbag control unit repair, certain error codes directly indicate internal problems with the control unit, rather than with sensors or seatbelt pretensioners. These codes often signal communication problems, internal memory errors, or problems with the module's self-diagnosis, requiring precise troubleshooting to resolve the failure.
- B1000 → Control unit communication error → Airbag ECU
- B1001 → Internal memory error in the control unit → Airbag ECU
- B1002 → Control unit self-test failed → Airbag ECU
- B1010 → Voltage supply or ground fault in the control unit → Airbag ECU
- B1015 → EEPROM memory error in the control unit → Airbag ECU
- B1020 → Internal processor error in the control unit → Airbag ECU
- B1030 → Communication error with airbag sensors (control unit side) → Airbag ECU
These error codes are specific to the Daihatsu Mira LA300 airbag control unit and indicate a need for repair, especially if the airbag warning light is permanently illuminated.
Reading the airbag sensor using an OBD-II scanner is the first step in the diagnostic process. Crash data stored after an accident often needs to be erased, which allows for specialized Daihatsu Mira LA300 airbag control unit repairs by service providers.
What part numbers are available for the Daihatsu Mira LA300 airbag control unit repair?
For the Daihatsu Mira LA300 airbag control unit repair, two 100% verified OEM part numbers are relevant: 89170-B2791 from Daihatsu itself and 150300-7440-93C56, a supplementary OEM number, presumably from a supplier. These numbers identify the exact module for the model and are crucial for correct identification during repair or replacement.
Part number 89170-B2791 is a direct OEM number from the manufacturer Daihatsu, specific to the airbag control unit of the Mira LA300.
The number 150300-7440-93C56 is used as an alternative, also OEM-qualified number for the same module, which ensures compatibility in the Daihatsu Mira LA300 airbag control unit repair.
It's important to note these specific numbers, as no other OEM part numbers could be verified for this control unit. An exact match is critical to the functionality and safety of the airbag system.
Technical details for Daihatsu Mira LA300 airbag control unit repair
The technical description of the Daihatsu Mira LA300 airbag control unit includes a non-volatile EEPROM memory (often 93c56 with 256 bytes) for crash and error data, a 12V on-board power supply, and an OBD-II interface for diagnostics. The module detects impact events using integrated sensors and controls the activation of the airbags and seat belt pretensioners, which must be taken into account during a Daihatsu Mira LA300 airbag control unit repair.
After an airbag deployment, the control unit stores relevant crash data, which must be erased before reuse. This is a key aspect of restoring a "broken" module.
The control unit has a built-in self-diagnosis that detects errors and signals them via the airbag warning light in the dashboard. This is an important indicator for an upcoming Daihatsu Mira LA300 airbag control unit repair.
Installation position and compatibility for Daihatsu Mira LA300 airbag control unit repair
The Daihatsu Mira LA300 airbag control unit is typically installed in the driver's compartment, often under the dashboard or in the center console, where it is well protected. It is compatible with Daihatsu Mira LA300 series models based on this platform from approximately 2011 to the mid-2010s, allowing for precise matching for Daihatsu Mira LA300 airbag control unit repair.
The unit is connected to airbag sensors, airbag modules, and seatbelt pretensioners via multi-pin connectors. Correct wiring is essential for safety after installation.
The diagnostic interface (OBD-II) provides access to error codes and reset functions, which makes troubleshooting and recommissioning much easier as part of a Daihatsu Mira LA300 airbag control unit repair.