Toyota Aygo AB40 airbag control unit repair

What is a Toyota Aygo AB40 airbag control unit?

The Toyota Aygo AB40 airbag control unit is the central electronic control unit responsible for the safety of vehicle occupants in the event of an accident. It continuously monitors sensors, stores relevant crash data, and precisely controls the deployment of all occupant restraint systems to ensure optimal protection.

This highly specialized component is crucial for the vehicle's passive safety and ensures that airbags and seat belt pretensioners are activated when needed.

It is tailored to the specific requirements of the second generation of the Toyota Aygo (model code AB40) from model year 2014.

Why is the Toyota Aygo AB40 airbag control unit defective?

A Toyota Aygo AB40 airbag control unit is often defective because it has internal memory errors, stores indelible crash data, or suffers from power supply problems. These failures cause the airbag warning light to stay permanently illuminated and the system to no longer function.

Common causes include the storage of crash data after an accident that cannot be deleted, thus blocking the control unit.

Internal defects in the EEPROM memory or software errors can also cause the airbag control unit to be broken and a Toyota Aygo AB40 airbag control unit repair may be necessary.

Power supply issues, such as undervoltage or overvoltage, can also impair the control unit's function and lead to failure. A professional Toyota Aygo AB40 airbag control unit repair service can resolve these issues.

Common error codes for Toyota Aygo AB40 airbag control unit repair

If a Toyota Aygo AB40 airbag control unit repair is necessary, specific error codes indicate problems with the control unit itself, rather than with sensors or other components. These codes help diagnose the exact defect in the airbag control unit and are crucial for a precise repair.

• B1000 → Control unit communication error → A general communication problem or a defect in the airbag control unit prevents proper operation.
• B1100 → Internal memory error in the control unit → Crash data cannot be erased, which is typical after an accident and requires a reset.
• B1200 → Power supply to the control unit faulty → Problems caused by undervoltage, overvoltage or damaged cables affect the power supply.
• B1300 → Software error or malfunction in the airbag control unit → Internal software defects activate the airbag warning light permanently.
• B1400 → EEPROM error → A memory error in the internal EEPROM of the control unit is hindering its function.
• B1500 → Communication error between airbag control unit and other control units → Faults in the CAN bus or data traffic prevent correct communication.

What part numbers are available for the Toyota Aygo AB40 airbag control unit repair?

Several specific and 100% verified OEM and supplier part numbers are relevant for the Toyota Aygo AB40 airbag control unit repair. These numbers identify the correct airbag control unit for your vehicle model, ensuring a compatible repair or replacement.

It is crucial to check the exact part number of the defective control unit to ensure compatibility.

The following part numbers are confirmed for the airbag control unit of the Toyota Aygo AB40 (model code AB40) from 2014 to 2022:

• Toyota 891700H020 : A genuine part number also produced by TRW as a supplier.
• Toyota 8917042D50 : Another original equipment manufacturer (OEM) part number for this model.
• Toyota 891700H190 : Also a genuine part number manufactured by TRW and fits the Aygo II.
• TRW 337644-101-95160 : This is the direct supplier number from TRW, which corresponds to Toyota 891700H190.

These numbers have been verified in several professional spare parts databases and by dealers with OEM quality and are essential for a successful Toyota Aygo AB40 airbag control unit repair.