Passenger Airbag Indication

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Fig 1: Identifying Passenger Airbag Indicator Light

Courtesy of VOLVO CARS CORPORATION

Supplemental restraint system module (SRS) transmits signals on the CAN network to the upper electronic module (UEM) if the front passenger airbag is activated or not. If the upper electronic module (UEM) receives information that the passenger airbag is deactivated, the upper electronic module (UEM) lights the passenger airbag warning lamp (PAD). The warning lamp is located in the upper section of the rear view mirror.

Depending on the market, if the switch for activating and deactivating the front passenger airbag is used to deactivate it, the passenger airbag disconnected (PAD) warning lamp lights.

The warning lamp goes out when the airbag is reactivated.

If an occupant weight sensor (OWS) is installed (market and model dependent), the passenger airbag disconnected (PAD) warning lamp lights when the airbag is deactivated. However there is an exception to this:

The passenger airbag disconnected warning lamp will remain unlit if the occupant weight sensor (OWS) registers that the passenger seat is unoccupied. This means that the passenger airbag is deactivated.

The warning lamp goes out when the airbag is reactivated.

Reasons that the passenger airbag disconnected warning lamp lights may also be:

communication problems between the supplemental restraint system module (SRS) and upper electronic module (UEM)
faulty function in the on/off switch for the front passenger airbag
defective occupant weight sensor (OWS) function.