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X
Y
Center Crash Sensor for X/Y Axis G858
Center Crash Sensor for X/Y Axis G858 is for measuring the
movement (both acceleration and de-acceleration) of the
vehicle along the X/Y axes.
It is used to validate the plausibility of dened crash situations.
Installation location
It is located on the center body tunnel near the cross
member of the driver’s seat.
637_011
637_010
Airbag Control Module J234
Sensors and data bus interface
The airbag control module for the Q7 has undergone
extensive modication.
Sensors that measure acceleration in the X and Y directions
and the yaw rate around the vehicle’s Z axis (inertial
sensors) are now installed in Airbag Control Module J234.
J234 is now connected to the FlexRay bus to help ensure a
minimum reaction time of approximately 2ms in the event
of a crash.
Airbag Control Module J234 records and provides body
movement data to ABS Control Module J104 (as well as
other modules). J104 processes this information and initi-
ates the appropriate action regarding all ESC functions.
Center Crash Sensor
for X/Y Axis
G858
Airbag Control Module
J234
637_050
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