What is a Toyota Avensis Sedan airbag control unit?
The Toyota Avensis Sedan airbag control unit is the central safety unit that activates all occupant restraint systems, such as airbags and seatbelt pretensioners, in the event of an accident. It continuously monitors sensors, stores relevant crash data, and ensures the proper functioning of all airbag modules in the vehicle.
This electronic module processes signals from impact sensors to determine the impact intensity and direction. Within milliseconds, it decides which restraint systems need to be deployed. This control unit is crucial for occupant safety in the Toyota Avensis Sedan.
Why is the Toyota Avensis Sedan airbag control unit defective?
A Toyota Avensis Sedan airbag control unit often fails due to damaged internal components such as memory chips, failure to erase old crash data, or a faulty power supply. This leads to system failures that require immediate diagnosis and repair of the airbag control unit.
Common causes include internal memory errors (EEPROM corruption) or software problems that prevent proper functioning. Faulty communication with other vehicle control units can also make the module appear "broken." Such defects are often indicated by specific error codes in the vehicle's error log.
A failure can also occur after an accident if the control unit stores crash data and then locks up. In such cases, a professional airbag control unit repair is necessary to reset the module and make it operational again.
Common error codes for Toyota Avensis Sedan airbag control unit repair
For Toyota Avensis Sedan airbag control unit repairs, specific error codes are crucial. They indicate problems within the control unit, not with sensors or other components. These codes help the repair shop accurately diagnose the defect and determine the cause of the failure.
- B1000 → Communication error → The airbag control unit does not communicate correctly with diagnostic tools or other control units.
- B1600 → Internal memory error → There is a serious problem in the internal memory of the airbag control unit.
- B1610 → Power supply error → The power supply to the airbag control unit is unstable or faulty.
- B1690 → Generic control unit error → A general defect in the airbag control unit requires a detailed inspection.
- B1800 → EEPROM corruption → The data stored in the EEPROM of the airbag control unit is corrupted.
- B1820 → Internal software error → An error in the internal software of the airbag control unit blocks its function.
- B1920 → Crash data stored → The airbag control unit has stored accident data and is blocked.
- B1930 → Crash data deletion error → Resetting or deleting the crash data in the control unit failed.
What part numbers are available for Toyota Avensis Sedan airbag control unit repair?
When repairing the Toyota Avensis Sedan airbag control unit, two OEM part numbers are particularly relevant: 89170-05122 from Toyota itself and 89170-05220 from TRW, a major supplier. These numbers guarantee compatibility and are verified for the Toyota Avensis T25 Sedan series.
Part number 89170-05122 is the standard genuine Toyota part and is widely documented as an OEM part for the Toyota Avensis 2.0 16V D-4D (Sedan). This number is often found in official spare parts databases.
Alternatively, 89170-05220 is a TRW part number that is considered a compatible and usable OEM module. TRW is a well-known supplier of airbag systems for Toyota, which ensures the quality and accuracy of this module during airbag control unit repair.
There are no other unique original OEM part numbers or replacement numbers from manufacturers such as Bosch, Continental, or Siemens for this specific Toyota Avensis Sedan airbag control unit. This simplifies the selection of the correct module for diagnosis and replacement or repair.