Airbag control unit with part number P8635A229

What does the airbag control unit P8635A229 do?

As the central unit, the part P8635A229 controls the restraint system (SRS) of Mitsubishi. It senses through the crash sensors whether an impact has occurred, decides within milliseconds in an emergency which airbags and seatbelt pretensioners are triggered, and monitors the entire system without pause. After an accident it stores crash data and locks itself.

The control unit detects faults itself and shows them via the airbag warning light. To do this, it checks its connections and the signal paths to the triggers continuously.

Why does the control unit P8635A229 fail?

The most common cause is crash data stored after an accident, and a normal diagnostic tool cannot clear it. In addition come aged components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes.

The crash data remains in the unit even if no airbag deployed in the accident. In addition, the following further causes are possible:

• aged electronic components
• cold solder joints
• moisture and corrosion at plug connectors
• voltage spikes, for example from a weak battery or a jump start

Which of these applies only becomes clear during the check. The list names possibilities, but not certainty.

How can you tell that the P8635A229 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, a fault message appears in the instrument cluster, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then fail to deploy.

If the airbag warning light starts to light up, the control unit is reporting a fault it has detected, even if the vehicle otherwise keeps running normally. Permanently or intermittently: both call for a check.

A diagnostic tool that cannot connect to the control unit also points to a fault. In this case the fault memory remains.

Which vehicles is the P8635A229 fitted in?

The airbag control unit P8635A229 is fitted in these vehicles: Mitsubishi Outlander CW (2006-2010) and CW Facelift (2010-2012).

The vehicles for which this part number is recorded are shown in the following overview:

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

Comparing the part number on the removed unit with this page shows you whether it is the matching unit, but not whether it is defective. Only a check of the fault memory before removal shows that, because only then is it clear whether the control unit or a connector 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 P8635A229 work?

The process begins at the vehicle: you read out the fault memory and attach the log. Then disconnect the battery before you remove the control unit. Next, create a repair order online and send in the unit well packed.

At Airbag24, the unit is examined on the test bench and defective components are repaired. Afterwards Airbag24 deletes the stored crash data and carries out a function test. For checking, repair and testing, 3–4 working days are usually scheduled.

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 P8635A229 get to Airbag24?

Either you send the unit as a parcel, or you arrange a UPS collection for an extra charge. The return after the repair is likewise by UPS.

The printed repair order goes into the parcel, and you pack the unit shock-proof.