Airbag control unit with part number 602 32 73 00

What is the function of the airbag control unit 602 32 73 00?

The airbag control unit 602 32 73 00 is an original control module manufactured by Autoliv, specifically designed for the passive safety system in the Peugeot 206 I. Its primary task is to monitor and activate all relevant restraint systems, including airbags and seatbelt pretensioners.

As the central processing unit, it processes signals from the vehicle’s acceleration and crash sensors. In the event of a collision, the control unit determines within milliseconds which airbags and seatbelt pretensioners need to be deployed to provide optimal occupant protection.

In addition, the device continuously performs self-tests and communicates the system status to the driver, typically via the airbag warning light on the instrument panel.

Why does the airbag control unit 602 32 73 00 fail?

The most common cause of failure for this control unit is stored crash data following an accident that cannot be erased. Often, external electrical disturbances—such as short circuits, undervoltage caused by a faulty battery or alternator, or wiring breaks in the vehicle’s electrical system—are the culprits.

These external influences can lead to internal software errors, which are recorded in the unit’s fault memory. The control unit then essentially locks itself to ensure system safety, preventing conventional diagnostic tools from erasing critical data.

Communication issues, where the control unit becomes unreachable to diagnostic equipment, are also a typical consequence of such electrical problems. Less frequently, direct hardware defects in internal components may occur.

How do you recognize a defect in the control unit 602 32 73 00?

A defect in the control unit 602 32 73 00 primarily manifests as a permanently illuminated or intermittently flashing airbag warning light on the dashboard. Additionally, establishing a stable diagnostic connection to the control unit often becomes impossible, complicating troubleshooting efforts.

The most obvious symptom is the persistently lit airbag warning light, which does not extinguish even after restarting the engine. This indicates a serious fault in the restraint system.

Another clear sign is when a workshop’s diagnostic tool cannot establish communication with the airbag control unit. The unit fails to respond to requests despite intact wiring.

The fault memory may contain specific error codes pointing directly to an internal software fault, coding issues, or irretrievable crash data.

In which vehicles is the control unit 602 32 73 00 installed?

The airbag control unit with part number 602 32 73 00 was specially developed by Autoliv for models produced by the French manufacturer Peugeot. At Airbag24, this control unit is repaired for first-generation Peugeot 206 vehicles.

Specifically, this control unit can be found in the following models and production periods:

Peugeot 206 I (model years 1998–2003)

Peugeot 206 I Facelift (model years 2003–2009)

How is the control unit 602 32 73 00 professionally repaired?

Professional repair at Airbag24 begins before removal with a thorough diagnosis, during which the fault memory is read out. Upon receipt, an analysis is performed to erase crash data, correct software errors, and replace defective components if necessary.

First and foremost, a precise fault-memory readout report must be prepared prior to shipping the control unit. This helps technicians accurately identify the root cause of the issue.

In the repair lab, the control unit is connected to specialized test benches. Using expert software, stored crash data is safely removed, and erroneous entries in the fault memory are cleared. For communication problems, software corrections are applied.

If the analysis reveals a hardware defect, the affected components are professionally replaced. Once repairs are complete, the control unit undergoes rigorous testing to ensure full functionality. Airbag24 provides 2 years' statutory liability for defects on all repairs.

Is repairing the control unit 602 32 73 00 worthwhile?

Yes, repair is highly cost-effective. According to the manufacturer, a new control unit for these models costs between 750 and 800 euros. Professional repair offers significant savings while restoring the original part’s full functionality.

Moreover, refurbishing the original control unit eliminates the need for time-consuming re-coding or programming of the vehicle, which would often be required with a new component. The repaired unit can be reinstalled using a plug-and-play approach.

Repair is not only more cost-effective but also a sustainable solution, as valuable electronic resources are reused. With 2 years' statutory liability for defects on the work performed, the repair also provides peace of mind.