Passenger's airbag deactivation

If a child's seat is fitted on the front passenger's seat, the front passenger's airbags must be disabled. On EU vehicles, disabling is by means of an airbag switch. On US vehicles, disabling is automatic by means of seat occupation detection.

Indicator lamp for passenger's airbag deactivation

The indicator lamp is activated and lights up when the front passenger's airbag is disabled. The indicator lamp is monitored by the airbag control module. If a fault in the power supply or lamp is determined, a fault memory entry is made in the airbag control module and the airbag warning lamp in the instrument cluster is activated!

Switch for passenger's airbag deactivation (EU version)

The airbag switch can only be activated/deactivated by means of the ignition key when the vehicle is stationary and the door is open.

The airbag switch

• is designed as a two-wire Hall switch.
  
• is supplied with voltage by the airbag control module.
  
• is permanently monitored by the airbag control module while the vehicle is being driven.
  

The passenger's airbag deactivation switch is supplied with clocked voltage by the airbag control module. The following shows the voltage curve that is measured at the airbag control module when the voltage curve is OK. For the voltage measurement, the adapter lead must not be connected to the passenger's airbag deactivation switch!

Comparison images for oscilloscope measurement

Note:

All work on the airbag must only be conducted with the battery disconnected!Connect and disconnect airbag control module, sensors and gas generators only with the battery disconnected!The airbag control module contains vehicle-specific data and must therefore be encoded before placing into operation!Removal and installation in other vehicles is prohibited!