2013 SSANGYONG KORANDO sensor

(6) A/C control
The air conditioner is operated at the defroster mode and MAX air conditioner mode and when the A/C
switch is turned to "ON" position. It is controlled by the A/C compressor of the engine ECU according to
the signal from the heater and A/C control assembly. The driver can see that the A/C has been activated
when an indicator lamps at the A/C switch and MAX A/C switch comes on. If the intake sensor detects
the freezing of the evaporator core, it stops the air conditioner by turning off the compressor.
MAX A/C control
This is designed for increasing driver comfort. When the switch is pressed, the air conditioner is
operated and vent and recirculation modes are selected automatically. The discharge temperature and
fan speed are regulated depending on the driver's choice.
A/C switch
MAX A/C control switch

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5. PTC HEATER OPERATION PROCESS
1) PTC Heater Input/Output Factors
The engine ECU controls the PTC (Positive Temperature Coefficient) heater system by adjusting the
power supplied to the PTC system according to the two measured temperature values from the engine
coolant temperature sensor and HFM sensor. This system is mounted to the heater air outlet in the air
condition system module and heats the air which flows to the passenger room. Since the PTC system is
heated by the electrical power, the electric load and alternator capacity is greater than the conventional
one. The PTC is not operated when a) the engine is cranking, b) the battery voltage is below 11 V, c) the
glow plug is being preheated.
The ceramic PTC features that the resistance rises quickly in a certain temperature range. The PTC
heater has 3 circuits with power of 330 W. While only 1 circuit in the PTC heater is connected during
PTC1 operation, 2 circuits are connected during PTC2 or PTC3 operation.

2) Control Condition For PTC Heater
Operation Operating condition PTC heater status
HI mode operation
(PTC2, 3)PTC heater operates in
"HIGH" mode if operating
conditions are met
LO mode operation
(PTC1)PTC heater operates in
"LOW" mode if operating
conditions are met
Conditions for
deactivating
Air conditioner blower switch OFF
When the ambient temperature sensor is
faulty (short or open circuit in the wiring)
Engine is cranking
Battery voltage is 11 V or less
Glow plug is being preheated (Glow indicator
comes on) -
-
-
-
-
-
-
-
-
Conditions for PTC heater "LOW" operation mode (2nd step)

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1. SPECIFICATIONS
Item Item Specification
Air bag unit (SDM)Voltage range 8.0 V to 16.0 V
Voltage for system diagnosis and
SDM self diagnosis8.0 V to 16.0 V
Voltage for communication
between front and side impact
sensors7.0 V to 16.0 V
Storage temperature
Operating temperature
Air bag module and seat belt
pretensioner0.4 A for 10 seconds
1.2 A for 2 ms
Front and side impact sensorsOperating temperature
Power voltage 5.0 to 11.0 V
Measurement range 5.0 to 11.0 V
Contact CoilRated voltage 12.0 V
Voltage range 9.0 V to 16.0 V
Air bag circuit resistance
Current capacity 5.0 A
Rotation 2.1 rotations for each (LH/RH)
direction
Replacement interval Change at every 10 years

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Impact sensor
Front impact sensor
The appearance of the front impact sensor has been changed.
Side impact sensor
The appearance of the side impact sensor has been changed.

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1. AIR BAG SYSTEM OVERVIEW
The air bag system is divided into front air bag system and side air bag system. The system protects the
occupant's body by deploying the air bags in the event of a collision. The system consists of 8 inflators
including the inflators of the seat belt pretensioners, air bag unit (SDM), and 4 impact sensors on the
front side and both sides of the vehicle. The air bag unit (SDM) determines the operation of each air bag
module and seat belt pretensioners using the crash signals from the front and side impact sensors in the
event of a collision. The front and side air bag systems are operated independently, and the body control
module (BCM) activates the auto door unlock function and various lamps including hazard warning lamp
and room lamps, when the crash signal from the SDM is received to notify others of emergency situation
and let the occupant escape easily. The SDM is equipped with self diagnosis function, and it performs
the diagnosis on the internal/external devices of the air bag system for a certain period of time after IGN
ON. And it monitors the air bag system regularly and turns on the air bag warning lamp on the
instrument cluster when a fault is found in the system, to notify the driver. The SDM has event data
recorder (EDR) function that stores the driving information data transmitted through CAN communication
from various units (vehicle speeds, engine rpm, brake application, etc.) in a crash or near crash event,
when the acceleration sensor in the air bag unit detects a sharp acceleration change, regardless of the
air bag deployment

Driver air bag
The air bag is installed at the center of the
steering wheel. The inflator of this air bag is
ignited momentarily in the event of a collision
and deploys the air bag cushion.
Air bag unit (SDM)
The air bag unit is installed in
the front side of the front
console, and it monitors the
air bag system and
determines the air bag
deployment in the event of a
collision.Front impact sensor
The front impact sensors are fitted
at the bottom of both LH and RH
headlamp inside the front
bumper, and output signals that
activates the front air bag system.
Air bag warning lamp
This lamp notifies the driver about the result of the
diagnosis and faults.
Passenger air bag
This air bag is installed in the upper side
of the instrument panel on the
passenger side. It activates in the same
way of the driver air bag.
2. AIR BAG SYSTEM LAYOUT
Passenger Air Bag ON/OFF Switch
The front passenger air bag is disabled (not
inflatable) when placing the passenger air bag
switch is located on the right side of the
instrument panel, and you can see it when
opening the front passenger door. Press and
turn this switch to operate.

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Side air bag
The side air bags are installed in the
outer sides of the driver (LH) and
passenger (RH) seats to minimize
occupants' side injuries in case of a side
impact. This air bag is operated based
on the collision signal from the side
impact sensor.
Curtain air bag
The curtain air bags are installed to the upper end of
both doors. The air bag provides head protection for
the front and rear outboard occupants in a side
collision.Side impact sensor
The side impact sensors are fitted at the
bottom of both LH and RH B-pillars, and
output signals that activates the side air
bag system.
BCM (Crash signal)
The BCM activates the auto door
UNLOCK, hazard warning lamp, and
room lamps when a crash signal of the
air bag unit (SDM) is input.Seat belt pretensioner
The seat belt pretensioners of all seats are
operated at the same time, in the event of a
collision. They pull the seat belt and holds the
occupants in the seat to minimize the impact.