Airbag control unit with part number P56043703AG

What does the airbag control unit P56043703AG do?

The airbag control unit P56043703AG controls the restraint system (SRS) for vehicles from Dodge. It evaluates the crash sensors, decides in an accident within milliseconds whether to trigger airbags and seatbelt pretensioners, and monitors the system continuously.

The unit reports faults via the airbag warning light in the instrument cluster. This indicator is the way in which the control unit signals malfunctions.

After an accident the unit stores crash data and locks itself. Anything more about this lock does not belong in the description of the function.

Why does the control unit P56043703AG fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed; a normal diagnostic tool cannot erase it. Other causes are ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

The unit records crash data after an accident, regardless of whether an airbag has fired. The diagnostic tool cannot remove it, which lengthens every preparation for repair.

Ageing electronic components and cold solder joints can be companions of a long vehicle life. Moisture and corrosion attack the contacts and disturb the signals.

Voltage spikes, for example from a weak battery or jump-starting, put additional strain on the electronics.

How can you tell that the P56043703AG is defective?

A defect shows up as the airbag warning light lighting up permanently or intermittently, and as a fault message in the instrument cluster. In addition, the diagnostic tool cannot reach the control unit, and the fault memory cannot be cleared.

The airbag warning light indicates the defect. It lights up either continuously or only intermittently, and in both cases you should have the condition checked.

If the connection to the unit fails although the vehicle starts normally, there is a fault. In an emergency, airbags and seatbelt pretensioners may then not be able to deploy.

Which vehicles is the P56043703AG fitted in?

The P56043703AG is fitted in these vehicles: Dodge Ram DR/DH/D1/DC/DM Facelift (2006-2009) and DR/DH/D1/DC/DM (2002-2006).

The vehicles from the stored data are listed here:

• Dodge Ram DR/DH/D1/DC/DM Facelift (2006-2009)
• Dodge Ram DR/DH/D1/DC/DM (2002-2006)

Compare the part number on the label of the removed unit with this page. This only ensures that it is the right unit. Have the fault memory read out beforehand, because only this result shows whether the control unit is defective or whether a plug or cable is the cause.

How does the repair of the P56043703AG work?

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

This sequence must be observed for safety reasons. The control unit is only removed from the vehicle after the battery has been disconnected.

Airbag24 examines the unit that has been sent in, repairs it and then tests it. Defective components are replaced and stored crash data is erased. Afterwards your own unit is sent 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 P56043703AG get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back by UPS.

Put the printed repair order into the parcel and pack the control unit shockproof before you dispatch it.