What is a Toyota Vitz XP90 airbag control unit?
The Toyota Vitz XP90 airbag control unit, also known as the SRS module, is your vehicle's central safety unit. It continuously monitors all occupant restraint systems, receives signals from crash sensors, and precisely activates the airbags and seatbelt pretensioners in the event of an accident to ensure maximum protection. It also stores important crash data and trouble codes for precise Toyota Vitz XP90 airbag control unit repair and diagnosis.
This module is the brain of the passive safety system and crucial for the proper functioning of front, side, and optional curtain airbags. It is responsible for reacting quickly to a collision and deploying the protection systems in a fraction of a second.
Regularly checking the system is important to ensure vehicle safety. The airbag warning light on the dashboard alerts you if there is a defect in the system and repair is necessary.
Why is the Toyota Vitz XP90 airbag control unit defective?
The Toyota Vitz XP90 airbag control unit may be defective because crash data was stored after an accident, preventing further operation. Internal electronic faults, surges, or age-related material fatigue can also cause failure, requiring immediate Toyota Vitz XP90 airbag control unit repair to restore safety.
The most common reason for a defect is the storage of crash data after an accident. The control unit registers a collision and is locked to prevent accidental activation.
Another possible cause could be internal errors such as EEPROM problems or processor errors. These electronic defects often lead to malfunctions or complete failure of the module.
Power supply issues or corrosion on the connectors can also cause malfunctions. Such failures are usually indicated by a permanently illuminated airbag warning light.
Sometimes the component's service life has simply been reached, which can lead to a gradual failure or unexplained errors. In these cases, a professional diagnosis is essential before having the Toyota Vitz XP90 airbag control unit repaired.
Common error codes for Toyota Vitz XP90 airbag control unit repair
During Toyota Vitz XP90 airbag control unit repairs, specific error codes often occur that indicate internal problems or communication errors within the module. These codes, which exclusively affect the control unit, must be read with a specialized OBD-II diagnostic tool to determine the exact cause of the error and enable a targeted solution.
- B1000 → Control unit communication error → Error of the airbag ECU with other vehicle networks.
- B1100 → Internal error in the airbag control unit → Software or hardware problem in the airbag ECU.
- B1120 → Airbag ECU power supply error → Voltage problem or short circuit in the airbag ECU.
- B1230 → EEPROM error in the airbag control unit → Memory problem in the airbag ECU.
- B1371 → ECU memory access error → Airbag ECU data access problem.
- B1440 → Faulty internal diagnosis in the airbag control unit → Self-test error in the airbag ECU.
- B1600 → Internal self-test error in the airbag control unit → Error during the system check in the airbag ECU.
- B1920 → Communication error or crash data stored in the airbag ECU → Stored collision data or communication error in the airbag ECU.
These error codes directly indicate a problem with the control unit itself. They differ from codes that affect sensors or seat belt pretensioners.
Reading these error codes is the first step toward diagnosis and repair. Often, the airbag control unit can be reset, especially in the case of crash data errors, to avoid replacement.
What part numbers are available for the Toyota Vitz XP90 airbag control unit repair?
For Toyota Vitz XP90 airbag control unit repairs, several verified OEM part numbers are relevant to ensure exact compatibility. It is crucial to use the correct number, as even minor deviations can lead to incompatibilities. Both original Toyota numbers and OEM replacement part numbers from suppliers such as Denso should be considered.
To find the right unit for your vehicle, it's essential to check the original part numbers. This avoids errors during ordering and installation.
The following OEM part numbers have been fully verified and are compatible with the Toyota Vitz XP90 (model years 2005-2010):
Original Toyota OEM part numbers:
- 89170-52140
- 89170-52141
- 89170-52143
- 89170-52144
Alternative / replacement OEM part numbers (Denso):
- 959104A010
- 95910-4A010
These numbers ensure that you receive a functionally identical and compatible module for the necessary repair or replacement. A thorough check of the current device's serial number before installation is recommended.
For a successful Toyota Vitz XP90 airbag control unit repair, you should always pay attention to the exact part numbers to ensure the full functionality of the SRS system.