2013 SSANGYONG KORANDO ignition

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General deployment of air bag
3) Deployment Procedure
Air bag cover (opening section)
Air bag cushion
Vent hole
Inflator
Filter
Ignition
Gas generator In general, the air bag unit transmits the ignition current to the ignition device of the corresponding air bag
inflator when a collision signal from the impact sensor is sent to the air bag unit
When the ignition device of the inflator is ignited, the gas generator generates nitrogen gas by being
burned, and this gas inflates the air bag cushion through the filter. The nitrogen gas used to inflate the air
bag exhausts through the vent hole immediately.
Cross section of driver air bag
Cross section of inflator

Seat belt pretensioner deployment
Original status 1.
Pretensioner operating 2.
Load limiter operating 3.
Inflator PistonThe piston and pinion in the seat belt
pretensioner are disengaged and the tension of
the return spring in it holds the occupant.
When the ignition current is transmitted from the
air bag unit to the ignition device of the seat belt
pretensioner, gas is generated from the inflator
and this pushes up the piston.
When the piston gear engages with the pinion
gear, the clutch is integrated and winds the seat
belt.
When the load on the seat belt increases and the
inner device stars being deformed, the pinion
rotates in reverse direction and the piston moves
downward. The residual pressure is released
through the vent hole of the piston when the
piston moves down. The gears of pinion and
piston are disengaged when the piston is located
at the lowest position. Pinion

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Operation 2.
Signal from unlock relay is output for 5 seconds (T3) after 40 ms (T2)
When turning IGN OFF during 5 seconds (T3) of unlock relay signal output
Signal from unlock relay is input for the rest of the time B.
C.
D.
E. Operation 1.
Air bag deployment signal is not input for initial 7 seconds (T4) after IGN ON A.
The room lamp comes on when the air bag deployment signal is input except when the room lamp
switch is turned off.
The hazard warning lamp flashes when the air bag deployment signal is input.
Resetting the auto door unlock function turns off the battery (cutting off BCM power). -
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(2) BCM control when air bag deployment signal is input
The UNLOCK by the air bag deployment signal takes priority over the LOCK/UNLOCK control from
other functions.
The LOCK/UNLOCK requests from other functions during or after the UNLOCK output by the air
bag signal are ignored. However, the LOCK control is carried out when the ignition switch is turned
to the "OFF" position.
The same request during the LOCK/UNLOCK output is ignored. However, the UNLOCK by the air
bag deployment signal or operation by the smart key is carried out.
When LOCK and UNLOCK outputs occur at the same time, the LOCK output is carried out and
UNLOCK is ignored. 1.
2.
3.
4.

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Air bag warning lamp
2) Air Bag Warning Lamp
The air bag unit turns on the air bag warning lamp on the instrument cluster for 6 seconds after IGN ON
while performing self diagnosis for the air bag system. If no fault is found in the system, it turns off the
warning lamp. After this, the unit monitors the system regularly, and notifies the driver by turning on the
air bag warning lamp when a fault is found in the system.
System normal
Comes on for 6 seconds after IGN ON and then goes out.
The air bag warning lamp comes on when: *
diagnosis is performed for the inside/external devices of
the system when the ignition is turned on
the air bag system is malfunctioning
the air bag unit and a diagnostic equipment communicate
each other -
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(1) Air bag warning lamp ON at initial IGN ON

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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.

4) Internal monitoring
The air bag unit checks the status of the air bag system and monitors the system for internal errors. If
an error is detected by self diagnosis, this unit disables part of the air bag system functions and outputs
a diagnostic trouble code (DTC) and air bag warning lamp signal.
Watchdog
The micro controller is monitored periodically. And if a fault is found, micro controller is reset, inflator
ignition function is limited, and the air bag warning lamp comes on. -
Air bag operations for errors
Internal errorsAir bag operation
Front air bag system Side air bag system
X-axis acceleration sensor
error
DisabledDisabled
Y-axis acceleration sensor
errorDisabled
Z-axis acceleration sensor
erroravailable
ROM checksum error Disabled
RAM checksum error Disabled
NVM checksum error Disabled
Internal acceleration sensor test
The air bag unit checks internal acceleration sensor when the ignition is turned on. The air bag unit
determines the deployment of the air bag for the collision signal input after the diagnosis. -
Non-volatile memory (NVM) test
The air bag unit checks the values stored in the memory. If the values are not correct, the air bag unit
sets a diagnostic trouble code (DTC) and turns on the air bag warning lamp. -

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2. WARNINGS FOR POWER SEAT
Adjust the driver seat before driving.
Make sure that the seat is firmly secured after adjusting.
Never drive the vehicle with the head restraint removed or lowered excessively. Otherwise, you
r
neck, spine or other parts of the body can be severely injured in the event of an accident.
If you recline the seatback excessively, you could slide under the seat belt and be injured severely
in a collision.
Do not put any object that could damage the seat on the seat.
The front and rear seats are equipped with the heated wire (seat warmer) system. Using the seat
warmer system excessively may cause minor burns. The following occupants should exercise
special care when using the heated wire seat.
Infants, children, old or handicapped persons
Persons with sensitive skin
Exhausted persons
Persons who is drunk or took medicine which causes drowsiness such as sleeping pills, cold
tablets, etc. -
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Do not place anything on the seat that insulates against the heat, such as a blanket or cushion.
Make sure that the head restraints are in place and secured properly. Never drive the vehicle with
the head restraint removed.
To minimize the injuries in a collision or an abrupt stop, make sure the seatback is in the upright
position before driving. If the seatback is reclined too much, the occupant could slide under the seat
belt in a collision or an abrupt stop and cannot be protected properly by the air bag system.
3. CAUTIONS FOR POWER SEAT
You can operate the power seat with the ignition switch OFF. However, frequent operation of the
seat switch with the engine stopped can result in battery becoming discharged.
Operating more than one seat adjustment switch at the same time can cause damage to the seat
motor. Therefore, operate the seat switch only one at a time.
Do not use organic solvents such as benzene, thinner, alcohol or gasoline to prevent the seat cove
r
from being damaged while cleaning.
Do not operate the seat position adjustment switch forcefully when the seat does not move or it
contacts an object.
If the power seat is not operated, check and correct the problem before driving off.

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5) Front Seat Heated Wire and Ventilation Operation
Operating conditions
Engine running
If the engine starts to crank during the seat heated wire and ventilation signal output, the seat heated
wire will not be operated until the cranking stops. -
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Operation description
After the ignition is turned on, the temperature of the seat can be adjusted in 3 levels (Level 2
pressed, the temperature level goes down by one level. Pressing the switch a third time will turn off
the operation. -
Operating process
When the front seat heated wire and ventilation switch is pressed, the front seat heated wire and
ventilation unit supplies the power to the corresponding seat for heated wire and ventilation operation
through the switch. -
The heated wire and ventilation functions cannot be operated at the same time.
(1) Heated wire and ventilation functions for front seat (driver seat heated
wire and ventilation - 2 levels, passenger seat heated wire - 2 levels)