What is a Toyota Proace City airbag control unit?
The Toyota Proace City airbag control unit is the central safety unit that activates all occupant restraint systems in the event of an accident. It monitors sensors, stores crash data, and ensures the proper functioning of all airbag modules in the vehicle, which is crucial for any Toyota Proace City airbag control unit repair.
This module, often installed in the center console, processes information from crash and acceleration sensors. In the event of an impact, it instantly deploys the relevant airbags and seatbelt pretensioners.
The control unit's electronics communicate with all passive safety systems of the Toyota Proace City. It is permanently operational and powered by the vehicle's on-board electronics.
Why is the Toyota Proace City airbag control unit defective?
The Toyota Proace City airbag control unit can be defective due to internal electronic errors, software problems, or the storage of crash data after an accident. An unstable power supply or a faulty memory chip can also lead to failures that require a Toyota Proace City airbag control unit repair.
Defects often result from an internal hardware error or corruption in the EEPROM memory. The control unit then stores error codes or refuses to work.
After an accident, crash data often remains stored, preventing the system from being reset. This data must be erased using special tools, which is typical for a professional Toyota Proace City airbag control unit repair.
Common error codes for Toyota Proace City airbag control unit repair
During a Toyota Proace City airbag control unit repair, specific error codes often occur that indicate internal problems such as communication errors (B1000), memory errors (B1120, B1231) or even stored crash data (B2100) that require specific diagnosis.
- B1000 → Control unit communication error → Data transmission error or internal defect.
- B1100 → Internal control unit error → General error in the internal logic or hardware.
- B1120 → Memory error in the airbag control unit → Problems saving or reading data in the ECU.
- B1200 → Power supply error → Interruption or lack of power supply to the control unit.
- B1231 → EEPROM memory problem → Defect in the non-volatile memory in the control unit.
- B1400 → Error in the airbag control unit sensor interface → Problem in processing sensor signals.
- B1420 → Control unit diagnostic error → The control unit cannot check its own functionality correctly.
- B1500 → ECU software error → Error in the firmware or operating system of the ECU.
- B1620 → Internal hardware error control unit → Serious physical defect in the internal electronics.
- B2100 → Crash data stored → After an accident, crash information is stored in the control unit that must be deleted.
What part numbers are available for the Toyota Proace City airbag control unit repair?
For Toyota Proace City airbag control unit repairs, several specific OEM part numbers are relevant to ensure the compatibility of the replacement part. These include original Toyota numbers as well as a manufacturer number from the supplier Bosch, all of which precisely match the airbag control unit.
The official Toyota OEM part number 9823741280 is a common reference for the Proace City's airbag control unit. An alternative genuine Toyota OEM number is A3C08601000.
Another verified Toyota OEM number that identifies the airbag control unit is 8917042D50. This is often listed alongside the Bosch supplier manufacturer number.
The Bosch manufacturer number 1521004560 or 152100-4560 is also assigned to the airbag control unit of the Toyota Proace City. It confirms Bosch as the OEM supplier for this safety-relevant component.