Airbag control unit with part number 04602340AD

What is the function of Airbag Control Unit 4602340AD?

The Airbag Control Unit 4602340AD is the central control unit (SRS Control Unit) for the restraint system in the second-generation Chrysler Stratus (2000–2006). It monitors sensors, evaluates crash data, and ensures the timely deployment of airbags and seatbelt pretensioners to safeguard occupants.

As the brain of the passive safety system, this module continuously processes signals from the vehicle’s acceleration and yaw rate sensors. Upon impact, it determines within milliseconds which restraint devices—such as front or side airbags—should be activated.

Its proper functioning is therefore critical for safety. In case of an internal fault or after a crash, the system is deactivated for safety reasons, indicated by the airbag warning light.

Why does Control Unit 4602340AD fail?

The most common cause of failure for Control Unit 4602340AD is the storage of crash data following an accident, which locks the system. Other typical defects include internal electronic malfunctions, damage caused by overvoltage, or moisture ingress leading to corrosion and short circuits on the circuit board.

After a collision, the control unit permanently stores accident-related data in its internal memory. This lock cannot be cleared using standard diagnostic tools at a workshop, necessitating specialized repair.

Beyond accidents, internal hardware faults may also occur. These include defective microprocessors, memory chips, or other electronic components on the circuit board. Such failures often result from aging, vibrations, or thermal stress.

External factors like overvoltage—for example, from jump-starting with reversed polarity—or moisture intrusion through leaks in the vehicle interior are also well-known causes of complete device failure.

How can you recognize a defect in Control Unit 4602340AD?

A defect in Control Unit 4602340AD primarily manifests as a constantly illuminated or flashing airbag warning light (SRS lamp) in the instrument cluster. Often, communication with the control unit via a diagnostic tool becomes impossible, or specific error codes such as B1000, 65535, or 93F9 (internal error) appear.

The clearest indication is the activated SRS warning light. It remains lit after starting the vehicle, signaling that the entire airbag system is disabled and will not deploy in the event of a crash.

Another clear symptom is a complete loss of communication. The workshop can no longer access the control unit with their diagnostic equipment to read out errors—it behaves as if it were no longer installed in the vehicle.

Alternatively, general error codes such as B1000, 65535, 93F9, or the message “internal error” are stored in the fault memory. These directly point to an irreparable defect inside the control unit, requiring either replacement or repair.

Especially after an accident, the warning light stays on because the stored crash data prevents reactivation of the system—even if all visible damages have been repaired.

In which vehicles is Control Unit 4602340AD installed?

The Airbag Control Unit with part number 4602340AD is specifically designed for Chrysler vehicles. At Airbag24, we mainly repair this module for the second-generation Chrysler Stratus, produced between 2000 and 2006. Similar control units can also be found in related models.

The primary application for part number 4602340AD is:

Chrysler Stratus (2nd generation, model years 2000–2006)

Due to technical platform similarities, control units with comparable architecture may also be installed in other models from the former Chrysler Group, such as the fourth-generation Chrysler Voyager or the Chrysler Sebring. Therefore, always verify the part number on the removed unit.

How is Control Unit 4602340AD repaired?

Repair of Control Unit 4602340AD at Airbag24 involves a systematic analysis to pinpoint the fault, addressing the underlying electronic issue, and erasing internal errors and stored crash data. Following restoration, full functionality is thoroughly tested. We provide 2 years' statutory liability for defects on all repairs.

Upon receipt of the control unit at Airbag24, a comprehensive diagnosis is first performed on a specialized test bench. Here, the symptoms described by the customer are verified, and the exact cause of the fault is localized on the circuit board.

The next step involves the actual repair. This may include replacing defective components, repairing circuit traces, or professionally resetting the internal memory. In particular, erasing crash data and permanent internal fault codes is a key part of the process.

After refurbishment, each control unit undergoes a final functional and communication test. This ensures that, once reinstalled in the vehicle, the device is immediately fully operational (“plug-and-play”) and the airbag warning light goes off.