Airbag control unit with part number P8635A242

What does the airbag control unit P8635A242 do?

The airbag control unit P8635A242 controls the restraint system (SRS) for Mitsubishi. It processes the signals from the crash sensors and decides in an accident, within milliseconds, whether airbags and seatbelt pretensioners are triggered.

The unit checks the system without interruption and shows faults via the airbag warning light.

After an accident, it stores crash data and then locks itself.

Why does the control unit P8635A242 fail?

The most common cause with the P8635A242 is crash data stored after an accident, even without a triggered airbag. Ageing electronic components, cold solder joints, moisture and corrosion, and voltage spikes are additional factors.

Diagnostic tools of the usual type do not remove this data, so it remains stored.

The other causes develop over time. Electronics age, solder joints can go cold, and moisture attacks the contacts. Voltage spikes, for example from jump-starting, add further stress.

How can you tell that the P8635A242 is defective?

A defect in the P8635A242 shows itself through features you will notice directly. In an emergency, airbags and seatbelt pretensioners may possibly fail to trigger.

Typical signs are:

• airbag warning light in the instrument cluster permanently or intermittently on
• error message in the instrument cluster
• diagnostic tool without connection to the control unit
• fault memory that cannot be cleared

If these features occur, have the system checked promptly.

Which vehicles is the P8635A242 fitted in?

The P8635A242 is fitted in these vehicles: Mitsubishi Lancer CY (2007-2017). Compare the part number on the label of the removed unit with this page.

The vehicle assignments are shown in the list:

• Mitsubishi Lancer CY (2007-2017)

The comparison only confirms that the unit fits. Whether it is defective or a plug or cable is the cause is shown by the fault memory, which you have read out beforehand.

For the same vehicles, we also repair control units with the part numbers P8635A146, P8635A168, TARME1308R0924, TARME2937R0152.

How does the repair of the P8635A242 work?

First have the fault memory read out, and the log goes into the parcel. Only after disconnecting the battery do you remove the control unit P8635A242. Then create the repair order online. Processing at Airbag24 usually takes 3–4 working days.

The sequence protects you when working on the restraint system, which is why it is fixed.

Airbag24 checks the unit on the test bench, replaces defective components and deletes stored crash data. Finally, a function test and the return shipment follow. Our repairs come with 2 years' statutory liability for defects. The repaired control unit comes back with all vehicle data and is ready for use as soon as it is refitted — no coding or programming is required.

How does the control unit P8635A242 get to Airbag24?

One shipping option is the parcel, another is a UPS collection for an extra charge. Airbag24 sends the control unit P8635A242 back by UPS after the repair.

The printed repair order is enclosed with the unit, and it is packed shock-proof.