Kia Stinger: Body Electrical System / Integrated Body Control Unit (IBU)

Kia Stinger CK 2018-2024 Service Manual / Body Electrical System / Integrated Body Control Unit (IBU)

Specifications

Items	Specifications
Rated voltage	DC 12 V
Operating voltage	DC 9 - 16 V
Operating temperature	-40 - 176°F (-40 - 80°C)
Dark current	Max. 4.0 mA

Components and components location

Components

Connector Pin Information

No.	Connector A	Connector B	Connector C
1	-	B-CAN (Low)	Front wiper low bus switch_Input
2	Mirror power_Input	B-CAN (High)	Ground (Power)
3	P-CAN (Low)	PDW-F_Power_Output	Battery (Power)
4	P-CAN (High)	PDW-R_Power_Output	Battery (ECU)
5	-	Ground (ECU)	Driver outside handle switch_Input
6	Right mirror unfold_Output	PDW Switch_Input	Position_Input(A/T Option) IGN Lock switch_Input (M/T Option)
7	Right mirror horizontal_Output	PDW (Option)_Input	Interior antenna1 (-)_Output
8	Immobilizer power_Output	-	Bumper antenna (-)_Output
9	Immobilizer ground_Output	-	Interior antenna2 (-)_Output
10	Brake switch_Input	-	Assist outside handle antenna (-)_Output
11	ESCL Enable_Output	Front wiper high relay_Output	Trunk interior antenna3 (-)_Output
12	Brake switch fuse_Input	Rear left seat belt indicator_Output	Driver outside handle anntenna (-)_Output
13	Fog switch_Input	Assist seat belt indicator_Output	-
14	Light switch_Input	-	COM (ESCL)
15	Front wiper volume switch_Input	LF Searching_Output	Auto light sensor power_Output
16	PDW Switch indicator_Output	-	ACC_Input
17	SSB Ring illumination_Output	SSB Switch1_Input	IGN1 Relay_Output
18	LIN CAN (PDW)	PDW_Power_Input	ACC Relay_Output
19	-	Security indicator_Output	ESCL (-)_Output
20	Engine RPM_Input	Sunroof status_Input	ESCL (+)_Output
21	Wheel speed sensor_Input	Rain sensor (Option)_Input	Assist outside handle switch_Input
22	-	Wiper parking switch_Input	-
23	Right mirror fold_Output	Wiper power relay_Output	Interior antenna1 (+)_Output
24	Right mirror vertical_Output	Front wiper low relay_Output	Bumper antenna (+)_Output
25	-	-	Interior antenna2 (+)_Output
26	Puddle pocket lamp_Output	-	Assist outside handle antenna (+)_Output
27	Start feedback_Input	Rear center seat belt indicator_Output	Trunk interior antenna3 (+)_Output
28	-	-	Driver outside handle anntenna (+)_Output
29	Starter relay_Output	SSB Symbo illumination (-)_Output	COM (EMS)
30	Headlamp high switch	Rear right seat belt indicator_Output	Auto light sensor ground_Output
31	Front wiper switch	SSB Switch2_Input	Auto light sensor signal_Input
32	-	ESCL Unlock switch_Input	IGN1_Input
33	Multifunction switch ground_Input		IGN2_Input
34	External buzzer_Output		IGN2 Relay_Output
35	SSB Symbo illumination (+)_Output		Front washer switch_Input
36	LIN CAN (Rain sensor)		Battery (+)_ESCL
37	-
38	ATM Solenoin_Output

Schematic diagrams

Circuit Diagram

Description and operation

Description

Integrated Body Control Unit (IBU)

Integrated body control unit has integrated several functions including body control module (IBU), smart key unit (SMK), and tire pressure monitoring system (TPMS).

Body Control Module (IBU) Functions

Burglar Alarm

Tailgate Burglar Alarm

Issues an alarm depending on the tailgate operation.

Panic Alarm

Generates warning sound and displays flasher lamp (horn & flasher) depending on the panic signal.

Security Lamp Control

Controls security lamp in vehicle alert status.

Heating Wire

Door Mirror Heating Wire

The defogger and deicer function prevents and removes fog and frost from the mirror and window using the rear window heating wire switch (defogger switch).

Rear Window Heating Wire Control

External Lamp

Tail Lamp

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.

Auto Light

Turns on/off the tail lamp and head lamp automatically depending on whether it is day or night when the head lamp switch is placed at Auto.

Welcome Light

The welcome light function turns on the head lamp and tail lamp for 15 seconds when an unlock signal is detected while vehicle door is locked.

Escort Function

Turns on the escort lamp when the power is turned off while the head lamp is on.

–	It turns on the head lamp and maintains the state for 20 minutes if ignition is turned off while the head lamp is on.

–	The head lamp remains on only for 30 seconds when the driver seat door is opened and closed during the 20-minute period.

–	The head lamp turns off when remote control lock button is pressed twice while the head lamp is on.

Head Lamp (Low Beam / High Beam)

Controls high beam / low beam depending on the head lamp switch (multi-functional switch).

Daytime Driving Light Control

Controls the daytime driving light lamp depending on the conditions at the time of vehicle start.

Internal Lamp

Engine Start Maintenance Button Lamp

Turns on/off the SSB lamp depending on vehicle power conditions, door open / closed status, and alert mode.

Room Lamp

Turns on/off the interior lamp depending on vehicle power conditions and door open / closed status.

Rheostat

Controls the brightness of interior electrical lamps (instrument cluster, HUD, AVN, etc.) depending on rheostat switch input.

Steering Wheel Heating Wire

Steering Wheel Heating Wire Control

Controls steering wheel heating wire based on steering wheel heating wire switch.

Tailgate

Tailgate Release Control

Releases the tailgate lock and issues a warning depending on the tailgate switch input.

Front / Rear Parking Assist

PAS Display

Receives a signal from parking assist sensor through LIN communication and displays it on the instrument cluster.

PAS Warning

Detects obstacles in front and rear sides using the parking assist sensor (PAS sensor) in the case of gear input (R or D) and issues a warning if there is an obstacle.

Warning

Seat Belt Reminder and Indicator Lamp

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.

Key Reminder Warning

Issues a warning if the driver seat door is open while ACC is on.

Parking Brake Warning

Generates a warning sound if vehicle speed exceeds 5 km/h while IGN is on and parking brake is on.

Sunroof Open Warning

Issues a warning if the key is removed and the driver leaves the vehicle while the sunroof is open.

Wiper and Washer

Wiper (Low / High / Mist / Auto)

IBU receives wiper switch signal via B-CAN and sends the data to wiper motor (embedded) via LIN communication.

Front Washer

IBU sends the washer switch signal to front washer motor.

Smart Key Unit (SMK) Functions

SMK	Door Lock and Unlock	Locks/Unlocks the door based on the door unlock signal and the signal from push buttons on the driver seat / passenger seat outside handles.
	SMK Welcome Light	Controls door mirror and puddle lamp after smart key authentication when the driver with smart key approaches the vehicle.
	Smart Trunk	Opens the trunk if the driver with valid smart key stays in front of the rear bumper (within LF antenna range) for 3 seconds or more.
SMK Warning	Key Reminder 1	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.
	Key Reminder 2	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.
	Door Lock Warning 1	Generates a warning sound with the external buzzer if the driver tries to leave the vehicle while ACC or IGN is on.
	Door Lock Warning 2	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.
	Door Lock Warning 3	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.
	Key Out Lamp Warning	If the vehicle moves at 3 km/h or less while ACC or IGN is 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.
SMK RKE (Remote Keyless Entry)	Door Lock / Unlock	Locks/Unlocks the door based on the door unlock signal and the signal from push buttons on the driver seat / passenger seat outside handles.
	Panic	Performs vehicle panic and panic stop functions based on the panic button signal.
	Window Open	Opens/Closes vehicle window based on the smart key signal.
Engine Start		Start Stop Button (SSB), Immobilizer, Start Relay Power Control, SSB Lamp Control

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.

Communication Network Diagram

Abbreviation	Explanation
ACU	Airbag Control Unit
AFL	Adaptive Front-Lighting System
AMP	Amplifier
AUDIO	Audio Head Unit
AVM	Around View Monitor
B_CAN	Body Controller Area Network
BCW	Blind-Spot Collision Warning
C_CAN	Chassis Controller Area Network
CDP	Compact Disk Player
CLU	Cluster Module
DATC	Dual Automatic Temp Control
DDM	Driver Door Module
ECM	Engine Control Module
F_PUMP	Fuel Pump Control Module
HUD	Head Up Display
IBU	Integrated Body Control Unit
ICU	Integrated Central Control Unit
IFB	Interface Box
IMS	Integrated Memory System
LDW	Lane Departure Warning
LKA	Land Keeping Assist
M_CAN	Multi media Controller Area Network
MDPS	Motor Driven Power Steering
MFC	Multi Function Camera
MTC	Manual Temp Control
ODS	Occupant Detection System
P_CAN	Powertrain Controller Area Network
PCM	Powertrain control module
PTG	Power Tailgate Module
RVM	Rear View Monitor
SCC	Smart Cruise Control
SCM	Steering Column Module
TCM	Transmission Control Module
VDC	Vehicle Dynamic Control
WPC	Wireless Power Charger

Repair procedures

Removal

1.	Disconnect the negative (-) battery terminal.

2.	Remove the glove box housing. (Refer to Body - "Glove Box Housing")

3.	Disconnect the blower motor connector (A) after removing the mounting clip (B).

4.	Disconnect the integrated body control unit connectors (A).

5.	Remove the integrated body control unit (A) after loosening the mounting nuts and bolt.

6.	Remove the wiring harness mounting clip (A) from the integrated body control unit.

Installation

1.	Install the wiring harness mounting clip from the integrated body control unit.

2.	Install the integrated body control unit.

3.	Connect the integrated body control unit connectors.

4.	Connect the blower motor connector and clip.

5.	Install the glove box housing.

6.	Connect the negative (-) battery terminal.

BCM Diagnosis With KDS

In the body electrical system, failure can be quickly diagnosed by using the vehicle diagnostic system (KDS).

The diagnostic system (KDS) provides the following information.

(1)	Self diagnosis : Checking failure and code number (DTC)

(2)	Current data : Checking the system input/output data state

(3)	Actuation test : Checking the system operation condition

(4)	Additional function : Controlling other features including system option setting and zero point adjustment

2.	Select the "Car model" and the 'Integrated body control unit (IBU)' to be checked in order to check the vehicle with the tester.

3.	Select the 'Current Data' menu to search the current state of the input/output data.

4.	To forcibly actuate the input value of the module to be checked, select option 'Actuation Test'.

5.	If you want to change user option, select "User Option".

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