Dodge ProMaster VF airbag control unit repair

What is a Dodge ProMaster VF airbag control unit?

In the Dodge ProMaster VF, the airbag control unit is the central control unit of the restraint system (SRS). It receives the signals from the crash sensors and, in an accident, decides within milliseconds which airbags and seatbelt pretensioners fire. At the same time it continuously monitors the entire system and indicates faults via the airbag warning light.

The unit is fitted in the Dodge ProMaster VF (since 2014). While driving, it constantly compares the state of the sensors, squib circuits and connected modules with its target values, and as soon as a deviation occurs, it writes an entry to the fault memory and switches on the light in the instrument cluster.

If an accident occurs, the control unit stores crash data and locks itself.

Why is the Dodge ProMaster VF airbag control unit defective?

Most often the cause is crash data that was saved in the unit during an accident, even if no airbag fired; an ordinary diagnostic tool cannot remove it. Other triggers are aged electronic components, cold solder joints, moisture with corrosion on the connectors, and voltage spikes.

Even after an accident in which no airbags deployed, the crash data remains in memory, and the warning light stays on, even once the bodywork has been completed.

Regardless of this, electronics wear out over time: components age, solder joints lose contact, and moisture attacks the connectors. Voltage spikes can also occur, for example with a weak battery or when jump-starting.

A problem with the control unit is indicated if the airbag warning light stays on permanently, the fault memory cannot be cleared, or the diagnostic tool cannot connect at all. Have the cause narrowed down at a specialist workshop; testing the unit will show whether it is defective.

Common error codes for Dodge ProMaster VF airbag control unit repair

The codes point to different types of faults: internal faults of the control unit, interrupted communication, and open or short-circuited squib circuits of the airbag and seatbelt pretensioner. This helps narrow down which area of the restraint system the fault lies in.

On the Dodge ProMaster VF, these entries occur in connection with the control unit:

• B2208 → Internal fault in the airbag control unit
• B2207 → Internal module fault in the airbag control unit
• U0151 → Communication with the airbag control unit lost
• B1B02 → Driver airbag, squib circuit: open circuit
• B1B51 → Driver seatbelt pretensioner, squib circuit: open circuit
• B1B52 → Driver seatbelt pretensioner, squib circuit: short circuit

Fault codes are read out with a diagnostic tool. However, a single code does not prove that the control unit is defective, as connectors, wiring or an airbag module can equally be the cause. Only testing shows where the fault actually lies.

What part numbers are available for the Dodge ProMaster VF airbag control unit repair?

You will find the part number on the label of the control unit. It determines the exact version, as within a model series there are different numbers depending on equipment and year of manufacture.

For the Dodge ProMaster VF, the following numbers are known, although this list does not claim to be complete:

• P68241442AA
• P68241442AB
• P68303231AA
• P68335041AA
• P68335041AB

Compare the number on your own unit with this list. This only ensures that you have the right unit in front of you; whether it is defective is shown only by reading out the fault memory or by testing.

The process up to the repair looks like this: you have the fault memory read out, disconnect the battery and remove the control unit. Then you create a repair order online and send in the unit. At Airbag24, testing, repairing and checking usually take 3–4 working days, after which the unit is sent back to you.

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.