V70 2.4T L5-2.4L Turbo VIN 58 B5244T3 (2002)
Impact Sensor: Description and Operation
Side Impact Sensor
Side Impact Sensor
The side impact sensors in the car are used to measure and evaluate the collision pulses, a decision is then transmitted to the supplemental restraint
system module (SRS).
The sensors which are used in the car are:
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Two side impact sensors in the B-posts.
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Two side impact sensors in the C-posts.
The side impact sensors have integrated logic which, in the event of a collision, determines if there was a large enough impact to warrant transmitting a
trigger pulse to the control module to deploy the side impact airbag. Only the side impact protection on the side from which the signal was sent can be
deployed.
The side impact sensors transmit continuous OK signals to the control module to indicate that they function. In the event of a fault in the side impact
sensors a fault signal is transmitted to the control module which stores a diagnostic trouble code (DTC). A diagnostic trouble code (DTC) is also stored
when the control module has not received an OK signal. Each side impact sensor has a software ID. The ID is used to check that the correct side impact
sensor is installed. This is because the activation level, on the signal which is transmitted to the control module, need not be the same for the different
side impact sensors.
The front (B-post) and rear (C-post) side impact sensors have different colors and coding on their connectors to simplify installation. The front side
impact sensors cannot be installed in the position for the rear side impact sensors and vice versa. Data transmission occurs on the same cable used for
power supply, i.e. one cable to each side impact sensor.
