L300 V6-3.0L VIN R (2001)
Impact Sensor: Description and Operation
SIDE IMPACT SENSOR (SIS)
The SIS is a crash-sensing device used to detect side impact collisions. An SIS is located in the left and right B-pillars. The SIS connects to the SIR
wiring harness using a 2-way connector. The SIS receives power from the SDM when the ignition is On. The SIS is used to perform the following
functions:
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Side Impact Crash Detection: The SIS monitors vehicle velocity changes to detect side impact crashes that are severe enough to warrant
deployment.
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Side Air Bag System Status Communication: The SDM monitors the SIS through two interface circuits. The SIS can communicate the status of the
side impact air bag system to the SDM.
