Kia Sorento: Description and Operation
| Description and Operation |
Body Domain Control Unit (BDC)
The body domain control unit is an integrated device that consists of a Body Control Module (BCM), a Identity
Authentication Unit (IAU), a Smart Key Unit (SMK), a Tire Pressure Monitoring System (TPMS), and an immobilizer.
| 1. |
Body Control Module Functions
Burglar Alarm
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Tailgate Burglar Alarm
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Issues an alarm depending on the tailgate operation.
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Panic Alarm
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Generates warning sound and displays flasher lamp (horn and flasher) depending on the panic signal.
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Security Lamp Control
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Controls security lamp in vehicle alert status.
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External Lamp
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Tail Lamp
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Turns on / off the tail lamp automatically. It also turns off the tail lamp
automatically when the driver forgot to turn off the lamp switch.
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Auto Light
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Turns on/off the tail lamp and head lamp automatically depending on whether it is day or night when the
headlamp switch is placed at Auto.
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Welcome Light
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The welcome light function turns on the headlamp and tail lamp for 15 seconds when an unlock signal is
detected while vehicle door is locked.
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Escort Function
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Turns on the escort lamp when the power is turned off while the headlamp is on.
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It turns on the headlamp and maintains the state for 20 minutes if IG is turned off while
the head lamp is on.
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The head lamp remains on only for 30 seconds when the driver seat door is opened and closed
during the 20 minute period.
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The headlamp turns off when remote control lock button is pressed twice while the head lamp
is on.
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Headlamp (Low Beam / High Beam)
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Controls high beam / low beam depending on the head lamp switch (multifunction switch).
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Daytime Driving Light Control
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Controls the daytime driving light lamp depending on the conditions at the time of vehicle start.
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Telematics (MTS)
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MTS Alarm Control
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Controls the output of the door lock/unlock/remote start/panic function in
response to the signal transmitted by the MTS unit
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Front / Rear Parking Assist (PDW)
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PDW Display
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Receives a signal from parking assist sensor through LIN communication and
displays it on the instrument cluster.
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PDW Warning
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Detects obstacles in front and rear sides using the ultrasonic sensor (PDW) in the case of gear range
("R" or "D") and issues a warning if there is an obstacle.
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Warning
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Seat Belt Reminder and Indicator Lamp
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Issues a warning if the seat belt is not fastened, and prevents pattern
activation if the vehicle is driven while the seat belt is not fastened.
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Key Reminder Warning
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Issues a warning if the driver seat door is open while ACC is on.
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Key Reminder Warning
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Generates a warning sound if vehicle speed exceeds 5 km/h while IG ON and parking brake is on.
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Sunroof Open Warning
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Alarm output function when getting out of the car by removing the key while the sunroof is open
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Wiper and Washer
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Wiper (Low / High / Mist / Auto)
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Controls wiper operating power and fail-safe circuit.
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Wiper
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Control the washer interlocking wiper.
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| 2. |
Smart Key Unit Functions
SMK
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Door Lock and Unlock
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Locks/Unlocks the door based on the door unlock signal and the signal from push
buttons on the driver's / passenger's side outside handles.
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SMK Welcome Light
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Controls door mirror and puddle lamp after smart key authentication when the driver with smart key
approaches the vehicle.
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Power Tailgate
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When holding a smart key and staying in the rear bumper (in the LF antenna area) for more than 3
seconds, the power tailgate opening function is performed.
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SMK Warning
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Key Reminder 1
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When the driver attempts to lock the door, it checks if there is a smart key
inside the vehicle and unlocks the door if there is one.
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Key Reminder 2
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Checks the door lock status for 0.5 seconds after the vehicle door is closed and unlocks the door and
generates a warning sound using the external buzzer if the door is locked.
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Door Lock Warning 1
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Generates a warning sound with the external buzzer if the driver tries to leave the vehicle while ACC or
IG ON.
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Door Lock Warning 2
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Generates a warning sound with the external buzzer if the driver tries to lock the door and leave the
vehicle while one or more doors are open.
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Door Lock Warning 3
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Searches for a smart key inside the vehicle when the driver tries to lock the door, and issues a warning
and does not lock the door if there is a smart key inside.
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Key Out Lamp Warning
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If the vehicle moves at 3 km/h or less while ACC or IG ON and the door is open, it searches for the
smart key every 3 seconds and blinks the warning lamp if there is no smart key.
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SMK RKE (Remote Keyless Entry)
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Door Lock / Unlock
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Locks/Unlocks the door based on the door unlock signal and the signal from push buttons on the
driver's / passenger's side outside handles.
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Panic
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Performs vehicle panic and panic stop functions based on the panic button signal.
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Engine Start
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Start Stop Button (SSB), Immobilizer, Start Relay Power Control, SSB Lamp Control.
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| 3. |
Tire Pressure Monitoring System (TPMS) Functions
Tire pressure monitoring system continuously monitors pressure and temperature inside the tire in order to
warn the driver of the changes in tire pressure that may have influence on vehicle driving conditions. TPMS
control module analyzes the data from the WE (Wheel Electronic) sensor attached inside each wheel and
determines the tire conditions and generates a signal that is necessary for warning lamp control.
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| 4. |
Identity Authentication Unit (IAU) Function
The IAU receives the encrypted digital key value from the smartphone, decrypts it, analyzes it, and
delivers the authentication result to the BDC.
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On Vehicle Inspection
Diagnostic with KDS
1.
The Body Domain Control unit (BDC) can quickly diagnosed for problems with t...
Body Domain Control Unit
On Vehicle Inspection
