Lancer LS L4-2.0L SOHC (2002)
Air Bag Control Module: Description and Operation
SRS-ECU
CAUTION: Never disassemble the SRS-ECU.
The SRS-ECU incorporates an analog G-sensor and safing G-sensor for frontal collisions and a safing G-sensor for side collisions. In frontal collisions,
the driver's and front passenger's air bags deploy and the seat belt pre-tensioners are activated only when both the analog and safing G-sensors detect
simultaneously a collision-induced G of a level exceeding the threshold as in the case with the conventional system. In the case of side collisions, the side
air bag on the side subjected to an impact deploys if the side impact sensor and the SRS-ECU's safing G-sensor detect simultaneously a lateral G of
forces above the predetermined level. Like the conventional system, the SRS-ECU is provided with the following capabilities:
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Backup power supply in case of power failure in collisions
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Boosting function in case of battery voltage drop
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Self-diagnosis function to avoid system's operation errors and improve its reliability
