Airbag control unit with part number 285013989

What is the function of Airbag Control Unit 285013989?

The airbag control unit with part number 285013989 is the central control module for the Supplemental Restraint System (SRS) in the Nissan Titan H61. It processes data from crash sensors and, within milliseconds, determines whether to activate airbags and seatbelt pretensioners to provide optimal occupant protection in the event of a collision.

As the “brain” of the passive safety system, this control unit continuously monitors all connected components, including front, side, and head airbags, seatbelt pretensioners, and the impact sensors distributed throughout the vehicle.

The unit ensures that the system remains operational at all times. With each vehicle start, it performs a self-test; if any faults are detected, the airbag warning light on the dashboard illuminates to alert the driver.

What types of defects occur in Control Unit 285013989?

Typical defects of Control Unit 285013989 include internal hardware malfunctions that trigger error code B1000, or the storage of crash data after an accident, which results in the system being locked out. External issues such as broken wiring or faulty connectors to the SRS can also impair functionality.

A common cause of failure is an internal component defect, indicated by error code B1000 (control unit fault) in the fault memory. This error usually cannot be resolved simply by clearing the codes and requires electronic repair of the hardware.

Following a crash, the unit stores so‑called crash data. These records lock the control unit and prevent re‑activation until it is professionally reset or replaced. During this period, the airbag warning light remains illuminated.

Additionally, physical damage to wiring or connectors between the control unit and sensors or airbags can lead to malfunctions. Precise diagnosis is essential to accurately identify the source of the problem.

A repaired control unit functions like new after repair and is compatible with alternative part numbers 98820-EZ20B and 98820-EZ29B.

How do you recognize a defect in Control Unit 285013989?

A defect in Control Unit 285013989 primarily manifests as the airbag warning light remaining constantly illuminated on the dashboard. Another clear indication is the lack of communication with the control unit during diagnostics or the presence of specific error code B1000.

The most obvious sign of a problem in the airbag system is the persistently lit airbag warning light. It does not turn off after starting the engine, indicating a serious stored fault that could compromise occupant safety.

During workshop diagnostics, the diagnostic tool may fail to establish communication with the airbag control unit. Such communication failures often point to a severe internal defect within the control module.

If the fault memory can be read, error code B1000 directly indicates an internal hardware malfunction within the control unit itself. This code signals that a component inside the electronics is no longer functioning correctly.

In which vehicles is Control Unit 285013989 installed?

The airbag control unit with part number 285013989 is specifically designed for Nissan Titan models. At Airbag24, we repair this unit for the second generation of the pickup truck, produced from 2015 onward, including the facelift model introduced in 2020.

At Airbag24, we offer professional repair services for Control Unit 285013989 installed in the following vehicle generations:

Nissan Titan H61 (2015–2020) and the facelifted H61 model (2020–2024).

How is Control Unit 285013989 repaired?

After sending the defective Control Unit 285013989 to Airbag24, our technicians perform a comprehensive diagnosis. Stored crash data is then erased, and any defective electronic components are repaired or replaced. Following successful final testing, the unit is returned with 2 years’ statutory liability for defects.

The repair process at Airbag24 begins with a detailed incoming inspection. Using specialized diagnostic equipment, the fault memory is read, and the exact cause of the defect—such as error code B1000—is identified.

A key step involves erasing crash data stored in the control unit’s memory after an accident. This data is completely and securely removed to restore full functionality.

If a hardware defect is present, damaged electronic components on the circuit board are expertly repaired or replaced. This also includes inspecting solder joints and connectors to ensure long-term reliability.

Upon completion of the repair, the control unit undergoes a comprehensive functional test on a test bench that simulates real‑world vehicle conditions. Our repairs come with 2 years' statutory liability for defects.