What is a Toyota Crown Hybrid airbag control unit?
The Toyota Crown Hybrid airbag control unit is the central safety unit in your vehicle, activating all occupant restraint systems, such as airbags and seatbelt pretensioners, in the event of a collision. It continuously monitors various sensors, stores relevant crash data, and is essential for ensuring the safety of all vehicle occupants.
This critical component is specifically designed for the Toyota Crown Hybrid (model DAA-GWS204), which has been in production since 2008 and includes modern models through 2025. It is the brain of the passive safety system.
The SRS control unit ensures the correct deployment of the front, side, and curtain airbags, as well as the seat belt pretensioners. A professional Toyota Crown Hybrid airbag control unit repair is therefore essential for your safety.
Why is the Toyota Crown Hybrid airbag control unit defective?
A Toyota Crown Hybrid airbag control unit often fails because it stores crash data after an accident, preventing it from being deployed again. Internal hardware or software errors caused by aging, voltage spikes, or manufacturing defects can also lead to failure and require immediate repair.
After an accident, the airbag control unit is often disabled, even if there is no physical damage. This requires a reset to erase the crash data stored in the internal memory and make the module operational again.
Other causes of failure include internal memory errors such as EEPROM defects or communication problems. These malfunctions impair the control unit's ability to properly control the airbags and require detailed diagnosis and repair in the workshop.
Voltage supply problems, whether too low or too high, can also cause malfunctions. If your airbag control unit is faulty, the airbag warning light on the dashboard will usually illuminate, signaling urgent attention.
Common error codes for Toyota Crown Hybrid airbag control unit repair
When diagnosing a faulty Toyota Crown Hybrid airbag control unit, specific trouble codes will appear that directly indicate internal problems within the control unit. These codes help technicians identify the exact cause of the failure and perform the necessary repairs to restore full functionality of the SRS system.
- B1000 → Control unit communication error → Internal error in the airbag ECU
- B1610 → EEPROM memory error in the control unit → Data corruption in the airbag ECU
- B1640 → ECU software / programming error → Software error in the airbag ECU
- B1650 → Internal memory error → Crash data or hardware error in the airbag ECU
- B1771 → Airbag control unit voltage supply too low or too high → Problems with the power supply to the airbag ECU
- B1780 → Airbag ECU self-test error → Error in the internal test of the airbag ECU
What part numbers are available for Toyota Crown Hybrid airbag control unit repair?
For a precise and successful Toyota Crown Hybrid airbag control unit repair, knowing the exact OEM part number is essential. These numbers guarantee the module's compatibility with your specific vehicle model and ensure that all safety functions are fully maintained after the reset or repair.
- 89170-30410 (Toyota Original OEM)
- 152300-7401 (Autoliv? OEM supplier)
- 89170-30J00 (Toyota Original OEM)
- 89170-30D70 (Toyota Original OEM)
These carefully verified OEM part numbers identify the correct airbag control module for your Toyota Crown Hybrid model. They are crucial for correct diagnosis and proper repair to prevent malfunctions and ensure safety.