S60 AWD L5-2.5L Turbo VIN 59 B5254T2 (2005)
WARNING: Never use an ohmmeter or similar tool to test airbags, inflatable curtains, the adaptive steering column or seat belt tensioners.
Disconnect airbags, inflatable curtains, the adaptive steering column or seat belt tensioners before testing them. Failure to do so may result in
accidental deployment. This could result in serious injury or death.
When the adaptive steering column in the collision protection system is activated, a pin is deployed which makes the steering column longitudinally
adjustable and thus collapsible. If the frontal collision exceeds a certain level the steering wheel is pressed into the dashboard to a greater degree than if
the steering column were rigid.
The steering is not affected by the deployment of the pin. The pin is deployed by a pyrotechnical charge and is located in the center of the steering
column. The collision protection system in the adaptive steering column only functions if the driver is wearing the seatbelt and if the airbag deploys. The
entire steering column must be replaced if the collision protection system in the adaptive steering column has deployed.
Occupant weight sensor (OWS) (certain markets and models only)
The occupant weight sensor (OWS) consists of three interactive components:
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The pressure sensor, installed under the front passenger seat
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The seatbelt force sensor, mounted in the seat frame on the outside of the front passenger seat
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Occupant weight sensor module, installed under the front passenger seat. The pressure sensor and occupant weight sensor are linked via a hose.
The pressure sensor registers the pressure the seat is exposed to, for example when someone is sitting in the car. Information from the seat belt force
sensor is also used to ensure the good performance of the system. The seatbelt force sensor informs the occupant weight sensor module what force the
belt is tensioned with. This is done because the pressure measured by the pressure sensor can be affected by the passenger fastening the seatbelt tightly.
This means that the passenger exerts greater pressure on the seat than during normal seatbelt use. The passenger is then interpreted as being heavier than
he or she is. The occupant weight sensor module uses the information from both the pressure sensor and seatbelt force sensor to calculate the actual
weight of the passenger. The occupant weight sensor (OWS) transmits continuous signals to the supplemental restraint system module (SRS) and
occupant weight sensor (OWS) on the LIN bus. If the occupant weight sensor (OWS) does not function correctly the supplemental restraint system
module (SRS) will:
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deactivate the front passenger airbag
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light the warning lamp for passenger airbag disconnected (PAD) in the upper electronic module (UEM)
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light the SRS (supplemental restraint system) indicator lamp and display the alert message in the driver information module (DIM).
If a fault occurs in any of the components the following should be noted:
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The pressure sensor and occupant weight sensor module must be replaced at the same time
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The seatbelt force sensor is replaced separately.