2013 SSANGYONG KORANDO turn signal

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4) Air Bag Deployment Signal to BCM
The air bag deployment signal from the air bag unit is sent to the BCM. This signal triggers the flash of
the hazard warning lamp to notify others of emergency situation, and is used as a signal that turns on the
room lamps and activates auto door unlock function for the occupants.
The air bag unit of a vehicle without side air bag system can also send the crash signal to the BCM
according to the value of the acceleration sensor to activate the auto door unlock and various lamps
including hazard warning lamp and room lamps.

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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). -
-
-
(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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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. -

Impact sensor monitoring
The air bag unit supplies a certain level of test current to monitor the front and side impact sensors. If the
wiring is open/short circuited or no signal is input, or communication is malfunctioning, it sets a DTC and
turns on the air bag warning lamp.
FaultsDetection
Time for clearing
Fault condition Time for detecting
Normal errorsIncorrect ID after IGN ON
Approx. 1 seconds.Approx. 2 seconds.
(next Ign) Faulty sensor after IGN ON
Communication error
Incorrect ID Inconsistent ID after IGN ON
Communication
errorCommunication data error
Approx. 2 seconds.
Open/Short circuit (B+)
Short Circuit to
GroundShort Circuit to Groundapprox. 2 to 4
seconds
6) DTC and Air Bag Deployment Data Storing
DTC storing
Airbag deployment data storing
The air bag deployment data due to a collision cannot be cleared. The air bag unit should be
replaced. -
- All DTCs of air bag system are stored in the air bag unit. Maximum number of DTCs that can be stored
is 16. If a new DTC is set after 16 DTCs are stored, the oldest stored code is erased first.
The air bag deployment data is stored in the air bat unit. Maximum number of data that can be stored is
7.

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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. -
-
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)

Operating conditions
IGN ON
If the engine starts to crank during the seat heated wire signal output, the seat heated wire will not be
operated until the cranking stops. -
-
Operation description
After the ignition is turned on, the heated wire of the front seat can be operated to the desired
temperature (LO/HI) by pressing the front seat heated wire switch.
After the ignition is turned on, pressing a rear seat heated wire switch activates the heated wire of the
corresponding seat and pressing the switch again turns off the heated wire operation. -
-
Operating process
When the front or rear seat heated wire switch is pressed, the power is supplied to the corresponding
front or rear seat heated wire through the switch. -
The seat heated wire and ventilation unit is not fitted in a vehicle without seat ventilation function.
(2) Heated wire function for front and rear seats (driver and passenger