Airbag control unit with part number 285001480

What is the function of Airbag Control Unit 285001480?

The airbag control unit with part number 285001480 is the central control unit (SRS ECU) for the passive safety system in certain vehicle models from Chrysler and Nissan. It processes signals from crash sensors and is responsible for deploying airbags and seatbelt pretensioners in the event of a collision.

As the “brain” of the restraint system, this component continuously monitors all connected sensors and actuators. In the event of a collision, it determines within milliseconds which safety devices—such as front airbags, seatbelt pretensioners, or the fuel shut-off valve—must be activated to provide optimal protection for occupants.

This specific control unit is primarily used in the Chrysler Concorde of the LH series and in the Nissan Terrano R20, produced between 1993 and 2007. Its proper functioning is essential for vehicle safety.

What types of failures occur with 285001480?

The most common causes of failure for control unit 285001480 include stored crash data that locks the system, internal hardware defects caused by voltage damage, and complete communication loss. These issues render the entire airbag system inoperable.

A major cause is the persistent storage of crash data after an accident. Even minor collisions without airbag deployment—such as rear-end impacts—can trigger the control unit to lock itself for safety reasons. This lock can only be released through specialized electronic repair.

Internal electronic faults are also widespread. Often, error code B1111 (control unit defective) is logged, indicating a hardware fault on the circuit board. Causes may include overvoltage damage or aging of electronic components such as capacitors or memory chips.

Another typical problem is total communication failure. The control unit no longer responds to diagnostic equipment requests, often accompanied by error code 65535 (control unit defective, supply voltage too low). This makes on‑vehicle diagnostics impossible and necessitates removal of the unit.

How do you recognize a defect in control unit 285001480?

A defect in control unit 285001480 primarily manifests as the airbag or SRS warning light remaining constantly illuminated on the instrument cluster. Additional clear indicators include lack of communication with diagnostic tools and specific error codes such as B1111 or 65535, which point to an internal malfunction.

The most obvious symptom is the airbag indicator light that fails to turn off after the engine starts. This alerts the driver that the safety system has a critical fault and may not function—or may not function correctly—in the event of a crash.

In the workshop, the defect often becomes apparent when no connection can be established with the airbag control unit. The diagnostic tool reports a communication error, significantly complicating further troubleshooting on the vehicle and directly pointing to a defect within the unit itself.

If communication remains possible, extracted error codes like B1111 (control unit defective) or 65535 (internal fault) provide clear evidence of irreparable hardware damage inside the control unit, preventing simple clearing of the fault memory.

In which models is control unit 285001480 installed?

The airbag control unit with part number 285001480 is mainly used in vehicles from Chrysler and Nissan. It is specifically assigned to the Chrysler Concorde of the LH series and the Nissan Terrano R20 from model years 1993 to 2007.

At Airbag24, we regularly repair this control unit for the following specific vehicle models. However, please always verify the part number on your unit to ensure compatibility:

- Chrysler Concorde (LH series)

- Nissan Terrano (R20 series, model years 1993–2007)

How does the repair of control unit 285001480 proceed?

Repair at Airbag24 is a purely electronic process that restores the control unit to its factory condition. Upon submission, a detailed analysis is performed, followed by correction of hardware defects and deletion of crash data. Finally, full functionality is thoroughly tested.

First, the control unit must be professionally removed from the vehicle. It is typically located beneath the center console or in the footwell. Before removal, it is crucial to disconnect the vehicle battery for at least 10 to 30 minutes to prevent unintended airbag deployment.

Once the unit arrives at Airbag24, our technicians conduct a comprehensive diagnosis at the component level, identifying issues such as stored crash data or damage caused by overvoltage. Subsequently, the circuit board is repaired according to industry standards, and the internal memory is reset.

Repair offers a cost-effective and sustainable alternative to expensive new purchases. Since your original control unit is refurbished, no new coding or vehicle programming is required. We provide 2 years' statutory liability for defects on every repair.