SUPPLEMENTAL RESTRAINT SYSTEM – AIRBAG SYSTEMRS–17
RS
• The center airbag sensor assembly receives
signals from the deceleration sensor and the
safing sensor built into the center airbag
sensor assembly and the side airbag sensor
and the rear airbag sensor, and determines
whether or not the front seat side airbag and
curtain shield airbag assemblies should be
activated, and diagnoses system
malfunctions.
• The center airbag sensor assembly sends the
airbag deployment signal to the ECM through
BEAN and CAN to operate fuel pump control.
• The center airbag sensor assembly sends the
airbag deployment signal to the main body
ECU through a discrete line to operate
collision door lock release control.
(2) Deceleration sensor and ignition control circuit
• The deceleration sensor is built into the
center airbag sensor assembly, front airbag
sensor, side airbag sensor and rear airbag
sensor, and the distortion created based on
the deceleration of the vehicle during a
frontal, front side or rear side collision is
converted into an electric signal.
• The ignition control circuit performs
calculations based on the signal output from
the deceleration sensors of the center airbag
sensor assembly, front airbag sensor, side
airbag sensor and rear airbag sensor. If the
calculated values are greater than the
specified values, it activates an ignition
operation.
(3) Safing sensor
• The safing sensor is built into the center
airbag sensor assembly. During a frontal
collision, the sensor turns on and outputs an
ON signal to the center airbag sensor
assembly if a deceleration rate greater than
the specified value is applied to the safing
sensor.
(4) Backup power source
• The backup power source consists of a
power supply capacitor and a DC-DC
converter. If the power system does not
function during a collision, the power supply
capacitor discharges and supplies electric
power to the system. The DC-DC converter
operates as a boosting transformer when the
battery voltage falls below a predetermined
level.
