What is a Subaru Legacy Touring Wagon airbag control module?
The Subaru Legacy Touring Wagon airbag control unit is the central safety unit that activates all occupant restraint systems in the event of an accident. It continuously monitors sensors, stores relevant crash data, and ensures the proper functioning of all airbag modules and seatbelt pretensioners to provide maximum occupant protection.
This module, also known as the SRS Airbag Computer or Airbag Control Module, is crucial for vehicle safety. It evaluates signals from various crash sensors and decides which restraint systems need to be deployed in an emergency.
Why is the Subaru Legacy Touring Wagon airbag control unit defective?
A Subaru Legacy Touring Wagon airbag control unit often malfunctions because it stores crash data after an accident that requires reprogramming, or because internal errors such as power supply or memory deficiencies occur. This can lead to system failure and require urgent Subaru Legacy Touring Wagon airbag control unit repair.
Because internal circuit defects or a faulty power supply may be present, typical error codes such as B1160 or B1170 are triggered. This affects the operation of the entire airbag system and requires a precise diagnosis.
An internal memory error (e.g., EEPROM error, DTC B1081) or a failed self-test (DTC B1100) can also damage the control unit. Such failures typically result in the airbag warning light in the instrument cluster activating.
Common error codes for Subaru Legacy Touring Wagon airbag control unit repair
When repairing the Subaru Legacy Touring Wagon airbag control module, certain error codes are common indicators of internal module problems. These codes signal that the control module itself is faulty, rather than external components like sensors or airbags, and indicate a necessary diagnostic procedure.
- B1000 → Control unit communication error → Indicates problems with data transmission within the control unit or with connected systems.
- B1081 → Internal memory error/EEPROM error → Indicates damage or fault in the control unit's non-volatile memory.
- B1100 → Internal self-test failed → Indicates a failure of the control unit's internal check routines.
- B1160 → Airbag Control Module Power Supply Error → Indicates problems with the power supply or internal voltage regulation of the module.
- B1170 → Airbag control unit reset error → Indicates faulty initialization or unexpected restart of the control unit.
- B1210 → Airbag control unit internal error (CPU reset) → Signals a critical internal error, often caused by a problem with the main processor.
- B1240 → Airbag control unit diagnostic connection error → Indicates problems communicating with external diagnostic devices.
- B1250 → Airbag control module timing error → Indicates a problem with the module's internal timing or oscillator.
- B1260 → Internal memory access error in the control module → Indicates difficulties reading or writing data in the module's internal memory.
What part numbers are available for the Subaru Legacy Touring Wagon airbag control unit repair?
For Subaru Legacy Touring Wagon airbag control module repairs, specific original OEM part numbers and corresponding alternatives must be considered. These numbers help identify the exact replacement or repair module for your vehicle model and ensure compatibility to avoid failure.
Verified genuine Subaru part numbers include 98221AJ15B, 98221AG29A (for models like the 2009 Legacy), and 98221AL06A (for the 2016 Legacy). 98221AG170 is also a known OEM part number for Legacy and Outback models.
A common alternative OEM part number is 1503009021, which often comes from suppliers such as Autoliv or Bosch. Before any repair, it is imperative to check the control unit's compatibility with the vehicle identification number (VIN) and ensure professional programming.