What is a Toyota Pixis Van airbag control unit?
The Toyota Pixis Van airbag control unit, also known as the SRS control unit, is the central safety unit in your vehicle that deploys all occupant restraint systems, such as airbags and seatbelt pretensioners, in the event of a collision. It continuously monitors sensor data and stores important crash information, ensuring functional safety in the event of an emergency for your Toyota Pixis Van model.
As an electronic control unit, the airbag control unit processes signals from acceleration sensors and other safety components. Its primary function is to accurately detect an accident and reliably activate the passive safety systems of the Toyota Pixis Van.
Genuine parts are based on Toyota or Daihatsu product specifications, as the Pixis Van is identical to the Daihatsu Hijet Cargo. The control unit is powered by the vehicle's 12V on-board voltage and contains firmware for crash detection and decision logic.
Why is the Toyota Pixis Van airbag control unit defective?
The Toyota Pixis Van airbag control unit may be defective because it permanently stores crash data after an impact, has internal electronic faults that prevent proper function, or is experiencing communication issues within the vehicle's electrical system. These conditions typically require a specialized Toyota Pixis Van airbag control unit repair to restore full safety functionality.
A common reason for an apparent defect is the storage of crash data after an accident, even if the control unit is mechanically undamaged. This data prevents the module from being reused and must be professionally erased.
Internal component defects, age-related wear and tear on the electronics, or even voltage fluctuations can also cause the control unit to fail. Such internal malfunctions often lead to a permanently illuminated airbag light in the cockpit, signaling the need for diagnostics.
Common error codes for Toyota Pixis Van airbag control unit repair
Toyota Pixis Van airbag control unit repairs often result in generic error codes, as specific, model-specific codes for the Pixis Van S321M are not publicly available. These codes, such as B1000 or B1861, typically indicate internal control unit errors, communication problems, or issues with the airbag module's power supply and require specific diagnostics.
A precise diagnosis of the error codes is crucial for identifying the cause of a defect in the airbag control unit. An OBD-II diagnostic tool with an SRS-specific readout function is essential for this.
The following codes are typical examples of errors that point to the airbag control unit itself and suggest a repair:
- B1000: Control unit communication error → signal interruption or internal circuit defect.
- B1233: Airbag control unit internal error → Malfunction of the internal software or hardware.
- B1610: Airbag control unit power supply error → voltage fluctuations or wiring problems.
- B1621: Airbag module internal malfunction → Hardware failure in the ECU module itself.
- B1790: Loss of communication between airbag ECU and control units → CAN bus error or wire break.
- B1861: Airbag-ECU communication error → Defective internal bus communication or external malfunction.
- B2000: Airbag control unit memory error → Corrupt crash data or EEPROM error.
What part numbers are available for Toyota Pixis Van airbag control unit repair?
For Toyota Pixis Van airbag control unit repair, there are currently no 100% verified OEM part numbers listed in the public Toyota parts catalog specifically for the Pixis Van S321M. Although numbers such as 89170-B5010 and 89170-B5020 exist for the related Pixis Truck, we can test your control unit regardless of the exact model and perform an effective repair to resolve the failure.
The research shows that no explicit OEM part numbers for the Pixis Van S321M airbag control unit are publicly displayed in the official Toyota EPC.
While part numbers such as 89170-B5010 and 89170-B5020 are listed for the Toyota Pixis Truck, their compatibility with the Pixis Van S321M is not officially verified.
Suppliers such as Bosch, Continental, and Autoliv also do not publish OEM part numbers for this specific model. This underscores the importance of a specialized workshop that can diagnose and repair the physical control unit even without an exact part number.
Since the Toyota Pixis Van is identical to the Daihatsu Hijet Cargo, part numbers of the Daihatsu equivalent may also be relevant. The repair is performed directly on the component in question, regardless of a specific, publicly available OEM part number.