Airbag control unit with part number P8635A116

What does the airbag control unit P8635A116 do?

As the airbag control unit P8635A116, this unit controls the SRS restraint system of Mitsubishi. It continuously checks the signals from the crash sensors and, in an accident, decides which airbags and seatbelt pretensioners are triggered; this happens within a few milliseconds.

The unit detects faults in the system itself and shows them via the airbag warning light. After an accident it stores crash data in memory and then locks itself.

Why does the control unit P8635A116 fail?

The most common cause on the P8635A116 is crash data stored after an accident, even if no airbag fired in it. An ordinary diagnostic tool cannot remove this data. Other causes include aged electronic components, cold solder joints, moisture or corrosion at plug connections, and voltage spikes, for example from a weak battery or jump-starting.

Crash data does not disappear by itself. It remains in the memory until it is deleted, and an airbag does not need to have triggered for that.

The other causes concern the electronics themselves and their surroundings. Components age, solder joints can go cold, and moisture reaches contacts, causing connections to weaken. Voltage spikes from the vehicle electrical system can also damage the circuit.

How can you tell that the P8635A116 is defective?

A defect on the P8635A116 shows itself through the airbag warning light in the instrument cluster, which burns constantly or intermittently, through a fault message in the instrument cluster, through a missing connection between the diagnostic tool and the control unit, and through a fault memory that cannot be cleared.

The warning light is the most important indication, because it shows faults in the restraint system directly. As long as it burns, airbags and seatbelt pretensioners may possibly fail to trigger in an emergency.

Because the vehicle keeps running normally in everyday use, a check is worthwhile already at the first indication.

Which vehicles is the P8635A116 fitted in?

The control unit P8635A116 is fitted in these vehicles: Mitsubishi Outlander CW (2006-2010) and CW Facelift (2010-2012). To see whether your vehicle is one of them, check against the details in this list.

The list of vehicles follows here:

• Mitsubishi Outlander CW (2006-2010)
• Mitsubishi Outlander CW Facelift (2010-2012)

First compare the part number on the label of the removed unit with this page, so that you know you have the right unit in front of you. Also have the fault memory read out before removal. Only the result shows whether the control unit is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 285011150, 285011151, 8635A215, 8635A221, 8635A282, 8635A283.

How does the repair of the P8635A116 work?

First have the fault memory read out and enclose the log, then disconnect the battery and only then remove the control unit P8635A116. Then create a repair order online and send the unit in well packed. Processing at Airbag24 generally takes 3–4 working days.

Airbag24 examines the unit on the test bench, repairs defective components, deletes stored crash data and runs a function test. Afterwards your own, repaired unit comes back to you.

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 P8635A116 get to Airbag24?

The control unit P8635A116 reaches Airbag24 as a parcel if you send it yourself, or you book a UPS collection for an extra charge. After the repair, Airbag24 sends it back by UPS.

Put the printed repair order in the parcel, and pack the unit shockproof.