Supply Voltage Monitoring - SSANGYONG Korando 2013 Manual

3) Supply Voltage Monitoring

The air bag unit monitors the battery voltage continuously while the ignition is turned on.. It limits certain
functions of the air bag system and outputs DTC and air bag warning lamp signal according to the result
of the monitoring.
Abnormal voltage of the air bag unit (too high/too low) is determined to be fault only when the signal
is detected for continuous 4 seconds.
Emergency power function
The SDM has an emergency power function that ensures the internal operation of the central unit
and buffering firing circuits for a minimum of 150 ms after loss of battery power. Full emergency
power capability is available after the minimum specified operating voltage has been applied to the
SDM power line for 10 seconds, and from this point, air bag deployment and EDR are enabled.
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