Airbag control unit with part number 602327300AU

What is the function of the airbag control unit 602327300AU?

The airbag control unit with part number 602327300AU is the central control module for the occupant restraint system (SRS) in the Peugeot J5 I (1994–2002). As an original OEM component from Peugeot/PSA, it processes signals from crash sensors, deploys airbags and seatbelt pretensioners in the event of a collision, and stores relevant crash data.

This unit serves as the brain of the entire passive safety system. It continuously monitors all connected components, such as impact sensors, seat occupancy mats, seatbelt pretensioners, and the airbag modules themselves. Within milliseconds, it determines which restraint systems must be activated during a collision to provide optimal protection for occupants.

Therefore, the proper functioning of this control unit is vital. A failure or malfunction results in deactivation of the entire airbag system, posing a significant safety risk.

Why does the airbag control unit 602327300AU fail?

A failure of the 602327300AU control unit is most often caused by the storage of crash data after an accident, which locks the system. Other common causes include internal electronic defects, indicated by error codes such as 65535 ("control unit defective"), as well as overvoltage damage or water ingress that can lead to complete system failure.

The most frequent cause of malfunctions is the accumulation of crash data. After a collision, the control unit self‑locks for safety reasons and requires professional reset. This is a manufacturer‑specified safeguard to prevent continued use of a potentially damaged system.

Electronic faults are also a widespread source of problems. These include internal defects on the circuit board—such as issues with microcontrollers, capacitors, or other circuits manufactured by Bosch, Delphi, or Continental. Such defects may manifest as error codes like 65535 or 93F9 (overvoltage damage) or result in total failure that worsens when heated.

Additional causes can include external factors, such as water damage leading to corrosion on the circuit board, or spontaneous component failures without any apparent external cause.

How do you recognize a defect in the 602327300AU control unit?

A defective 602327300AU airbag control unit primarily shows itself through a permanently illuminated or flashing SRS airbag warning light on the instrument cluster. Often, communication with the control unit via a diagnostic tool is no longer possible, preventing fault diagnosis at the workshop and pointing to an internal defect.

The most obvious sign is the activated SRS warning light. It alerts the driver that the passive safety system is not operational and that airbags would not deploy in the event of a crash. An immediate inspection at a specialized workshop is therefore essential.

Another clear symptom is the lack of communication capability of the control unit. When a workshop attempts to read the fault memory via the diagnostic interface, no response is received from the device. This blocks further troubleshooting of peripheral components and directly indicates a severe internal defect in the control unit.

In cases where communication remains possible, specific error codes are often stored in the memory. A common entry is error code 65535, which directly points to a defective control unit, or errors indicating CAN communication problems or faulty supply voltage.

In which vehicles is the 602327300AU control unit installed?

The part number 602327300AU is specifically designed for the first-generation Peugeot J5 van. Repair of this control unit is therefore relevant for vehicles of this model built between 1994 and 2002, where this original component was factory‑installed.

At Airbag24, professional repair services for the 602327300AU airbag control unit are offered for the following model:

Peugeot J5 I (model years 1994–2002)

How is the 602327300AU control unit professionally repaired?

Professional repair of the 602327300AU control unit at Airbag24 includes precise component‑level diagnostics, replacement of defective parts, and secure erasure of stored crash data. Following a final functional test, the unit is fully restored and returned with a 12‑month warranty, preserving its original coding.

After submission to Airbag24, repairs follow a proven, systematic process that ensures reliable restoration while avoiding costly new purchases.

First, a comprehensive incoming inspection is carried out. Using state-of-the-art diagnostic equipment, the fault memory is read out, and internal crash data as well as sensor signals are analyzed to pinpoint the exact cause of the fault.

Next, technicians locate the defective components on the circuit board. During this component-level repair, faulty microcontrollers, capacitors, or other circuit elements are identified and replaced with high-quality new parts.

A key step is the complete and secure erasure of all stored crash data, restoring the control unit to its original factory settings. Following the repair, the device undergoes a rigorous final inspection to verify the flawless operation of all systems. All repairs come with a 12-month warranty.

What shipping options does Airbag24 offer?

For repairs at Airbag24, you can easily send your control unit in free of charge or arrange a convenient UPS pickup at your preferred location. Returns are equally flexible, offered either as free standard UPS shipping, via UPS Express, or with cash-on-delivery for both shipping methods. Self-collection is also available.

For sending your item to us, you have two convenient options: You can take the package to the post office yourself and send it to us free of charge, or use the UPS pickup service, which collects the package directly from your home or workshop.

When returning your repaired control unit, you can choose between free standard UPS shipping (1–3 business days) and faster UPS Express shipping (1–2 business days). Both options are also available with cash-on-delivery if you prefer to pay upon receipt. Alternatively, you can pick up your repaired control unit in person at our facility.