Hyundai Sonata: Body Control Module (BCM). Schematic Diagrams - BCM (Body Control Module) - Body Electrical SystemHyundai Sonata: Body Control Module (BCM). Schematic Diagrams

BCM Connector Terminals

BCM Input Signal SPEC
No
 Input signal name
 Logic state
 ON/OFF voltage
recognition level (V)
 Remarks
A01
 B+
 ON = Battery
 9V ~ 16V
  
A02
 IGN1
 ON = Battery (IGN KEY is ON or START position)
 7V or more / 4V or less
  
A03
 IGN2
 ON = Battery
(IGN KEY is ON position)
 7V or more / 4V or less
  
A04
 Brake switch
 ON = Battery (Starting state)
 7V or more / 4V or less
  
A05
 Mist switch
 ON = Battery
7V or more / 4V or less
  
A06
 Crash unlock input
 -
 -
 PWM
A07
 Head lamp low switch
 OPEN = GND
 2V or less / OPEN
(Reference value:4V or more)
  
A08
 Head lamp high switch
 OPEN = GND
 2V or less / OPEN
(Reference value:4V or more)
  
B03
 Front fog lamp switch
 OPEN = GND
 2V or less / OPEN
(Reference value:4V or more)
  
A13
 ACC
 ON = Battery
 7V or more / 4V or less
  
A16
 INH 'R' switch
 ON = Battery
 7V or more / 4V or less
  
A18
 Wiper INT volume
 -
 -
 A/D
A23
 Key inter lock switch
 ON = GND
 2V or less / OPEN
(Reference value:4V or more)
  
A21
 Key in switch
 ON = GND
 2V or less / OPEN
(Reference value:4V or more)
  
A22
 Tail lamp switch
 ON = GND
 2V or less / OPEN
(Reference value:4V or more)
  
B01
 LIN (RPAS)
 -
 -
 Communi
cation
B11
 Auto light signal
 -
 -
 A/D
B13
 Auto light switch
 ON = GND
 2V or less / OPEN
(Reference value:4V or more)
  
B14
 Diagnosis (K-Line)
 -
 -
 Communi
cation
B15
 Rear defogger switch
 ON = GND
 2V or less / OPEN
(Reference value:4V or more)
  

Pin Arrangement

Connector A
No.
 Signal Label
 Signal Definition
A01
 B+
 Battery
A02
 IGN1
 Local ignition1 input in BCM
A03
 IGN2
 Local ignition2 input in BCM
A04
 Brake switch
 Brake switch
A05
 Mist switch
 Mist switch
A06
 Crash unlock input
(PWM)
 Crash unlock input from airbag
A07
 Head lamp low switch
 Head lamp low switch
A08
 Head lamp high switch
 Head lamp high switch
A09
 -
 -
A10
 -
 -
A11
 -
 -
A12
 -
 -
A13
 ACC
 Local ACC input in BCM
A14
 -
 -
A15
 -
 -
A16
 INHIBIT 'R' switch
 INHIBIT 'R' switc-h-
A17
 Washer switch
 Washer switch
A18
 Wiper INT switch
 Wiper INT switch
A19
 -
 -
A20
 Wiper INT volume
 Wiper INT volume
A21
 Key in switch
 Key in switch
A22
 Tail lamp switch
 Tail lamp switch
A23
 Key inter lock switch
 Key inter lock switch
A24
 GND (Signal)
 Signal ground

Connector B
No.
 Signal Label
 Signal Definition
B01
 LIN (RPAS)
 LIN Communication
B02
 -
 -
B03
 Front fog lamp switch
 Front fog lamp switch
B04
 Parking brake switch
 Parking brake switch
B05
 -
 -
B06
 -
 -
B07
 AV tail
 AV tail
B08
 CAN high
 CAN high
B09
 CAN low
 CAN low
B10
 GND (Auto light)
 Auto light ground
B11
 Auto light signal
 Auto light signal
B12
 Auto light power
 Auto light power
B13
 Auto light switch
 Auto light switch
B14
 Diagnosis (K-Line)
 K-line communication
B15
 Defogger switch
 Defogger switch
B16
 Assist seat belt indicator LED
 Assist seat belt indicator LED
B17
 Security indicator LED
 Security indicator LED
B18
 -
 -
B19
 Head lamp low signal
 Head lamp low signal
B20
 Speed IMS
 Speed state to IMS

Connector C
No.
 Signal Label
 Signal Definition
C01
 Safety power window enable high
 Safety power window enable high
C02
 Key in state IMS
 Key in state to IMS
C03
 -
 -
C04
 Room lamp
 Room lamp
C05
 -
 -
C06
 Key SOL
 Key solenoid
C07
 ATM SOL
 ATM solenoid
C08
 Glove box switch
 Glove box switch
C09
 Key hole illumination
Lamp LED
 Key hole illumination
Lamp LED
C10
 -
 -
C11
 Glove box lamp
 Glove box lamp
C12
 -
 -
C13
 -
 -
C14
 Wiper relay
 Wiper relay
C15
 -
 -
C16
 Head lamp washer relay
 Head lamp washer relay
C17
 -
 -
C18
 GND (POWER)
 Power ground


Circuit Diagram


    Body Control Module (BCM). Description and Operation
    Description Body control module receives various input switch signals controlling time and alarm functions for the intermittent wiper timer, washer timer, rear defogger timer, seat belts ...

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