Kia 2004.5 Spectra Service Technical Training page 273

2004.5 Spectra Technology
ARMING/SAFING SENSOR
ACCELEROMETER
SRS WIRING HARNESS
Supplemental Restraint System
The Arming/Safing Sensor is a dual-contact
electromechanical switch that closes if it senses a
deceleration exceeding a specified threshold, such as
an impact event. Exceeding a specific threshold
activates the arming function and firing current must
also flow across the safing sensor contact to deploy
the air bags. The safing function of the sensor
assures that airbag deployment circuits remain
disarmed under normal conditions. The closing of just
one sensor by itself will not deploy the air bags.
The Accelerometer is an integrated electronic
accelerometer that provides an electrical
representation of the vehicle acceleration in G-forces.
The accelerometer is initialized at key ON. It performs
a status check, then a bias calculation, and finally a
deflection test. Reliability of impact sensing and airbag
deployment is assured so that no single point can
cause an inadvertent deployment. See FIS and SIS for
additional information on second accelerometer.
SRS wiring harness is located throughout the vehicle
to connect SRS components together electrically. The
harness is wrapped in yellow tubing and tape to
identify and protect it. SRS wiring harness should not
be repaired only replaced. Shorting bars internal to
the connectors are used to prevent unwanted
deployment and to turn ON the SRI if the SRSCM is
disconnected.
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