Hyundai Genesis: Fuses And Relays / Relay Box (Passenger Compartment) Description and Operation

Hyundai Genesis (DH) 2013-2016 Service Manual / Body Electrical System / Fuses And Relays / Relay Box (Passenger Compartment) Description and Operation


Active Air Flap
Airbag Control Unit
Assist Door Module
Active Hood System
Armrest Switch
Advanced Smart Cruise Control
Around View Monitor
All Wheel Drive
Body Controller Area Network
Body Control Module
Blind Spot Detection
Chassis Controller Area Network
Center Control Panel
Cluster Module
Dual Automatic Temp Control
Driver Door Module
Display Monitor
Driver Seat Switch
Electronic Control Suspention
Engine Management System
Electronic Parking Brake
Eva Vacuum Pump
Fuel Pump Control Module
Head Unit
Haptic Steering Warning System
Head Up Display
Telematics System
Integrated Dynamic Brake
Lane Departure Warning System
Multi media Controller Area Network
Motor Driven Power Steering
Multi-Function Switch
Occupant Detection System
Powertrain Controller Area Network
Parking Guide System
Pre-Safe Seat Belt
Power Seat Module
Power Trunk Lid Module
Rear Remote Control
Steering Angle Sensor
Steering Column Module
Smart Junction Box
Seat Lumber Bolster
Smart Key Unit
Smart Parking Assist System
Steering Wheel Remote Controller
Transmission Control Unit
Tire Pressure Monitoring System
Vehicle Dynamic Control

IGPM (Central Gateway and smart junction block)
IGPM (Integrated Gateway Power Control Module) is an integrated model of smart junction block and central gateway.
It performs the function of conventional "Smart junction block" and the function of communication medium of "Central Gateway".

Central Gateway(CGW)
CGW is a controller enabling communication among the controllers connected to the different networks.
There are five CAN networks connected to CGW.
B-CAN and M-CAN are connected to the low-speed CAN, C-CAN and P-CAN to the high-speed CAN while D-CAN is connected for inspection.
CGW Main Features
Routing : Information exchange among different in-vehicle communication networks.

Network security control : It only allows inspection communication (D-CAN) to connect in-vehicle communication network in order to prevent

Additional functions
If alarm light is ON, carry out remote diagnosis of Chassis system (C-CAN) through I-Box and gateway
I-Box remote diagnosis (C-CAN) function via gateway shall be suspended.
Dark current measurement: After sending forced electronic parts sleep message to each network from the diagnosis equipment, gateway also enters sleep mode.
Operation current check: Check problem through operation of electronic parts
Fault diagnosis on CAN signal transmission failure by communication control defect
(CGW records DTC for the controller with transmission failure.)
How to check CGW
Although "No CGW CAN signal (TIMEOUT)" record appears when checking the DTC of the faulty electronic component, never determine it as the CGW failure. CGW is a controller that intermediates in-vehicle transmitting/receiving controllers. If one of the following two cases arises: (1) the transmitting controller fails to send a message to CGW, leading to CGW failing to send it to the receiving controller; (2) CGW sends the pre-determined value (Timeout Value), the corresponding receiver records the DTC of the failure of message transmission. Thus, to finally determine the controller that fails to send CAN signal, the DTC of CGW shall be checked. CGW records DTC only when it fails to receive the signal for more than 10 seconds with KEY ON. To identify the cause of no CAN signal transmission, the CGW DTC shall be checked after waiting for more than 20 seconds with KEY ON.
If the CAN communication control unit is not reinstalled after being removed from the vehicle, CGW records the DTC of ‘No CAN signal’ for the unit.
For example, the failure code of 'DDM CAN signal is not out' is created when the removed DDM is not reinstalled.
If a DTC remains after replacing electronic components and the failure code is not erased, check whether the connector of the electronic component is properly connected, and whether the controller's CAN wiring operates normally. In case that the removed electronic component cannot be reinstalled, "Erase Expected Network Config" service shall be performed. Refer to the DTC inspection guide for each failure code for the service execution method.
Otherwise, the DTC of "No CAN Signal" on the corresponding controller may not be deleted.
Perform the "Additional function" > "Network setting initialization" in examining device (GDS) by referring to DTC guide.
IGN2 of SJB is ON when MCU is out of order (State of non-operation due to the external physical or electrical shock). The safety of the driver is secured by forcible lighting on the head lamp low, external and internal tail lamps when the headlamp low switch is ON.
IGN2 is ON when the data transmitting/receiving is impossible by the failure on the CAN communication line (Both of high/low cables are shorted, BAT short in high/low, GND short in high/low) in case of failure on CAN communication line connected to SJB module. When the headlamp low switch is ON, the headlamp low and internal/external tail lamps are lighted forcibly.
Smart Junction Block(SJB)
Smart Junction Block (SJB) is a module that performs the function of conventional Junction Box and some functions of BCM.
It controls various components including lamps by using CAN communication and IPS (replacing the function of fuse and relay) or ARISU.

IPS stands for Intelligent Power Switch, which uses the semiconductor technology to replace the current role of fuse and relay.
The IPS chip has two functions :
1) the high current-based component control
2) component protection from overcurrent.

The advantages of IPS are as follows:
Reduce relay and consequently decrease weight and volume
Remove the relay operation noise
No need to replace fuses and increase the product life
Capable to diagnose faulty parts
SJB control entry
Switch signal input
Assist seat belt switch
Assist seat belt reminder switch
Assist the door switch
Driver's seat belt switch
Driver's seat belt switch
Rear left seats door switch
Rear right seats door switch
Rear Safety seat belt switch Left
Rear Safety seat belt switch Right
Rear Center seat safety belt switch
IGN1 switch
IGN2 switch
Brake fluid sensor
Trunk open switch
Trunk lid handle switch
HID head lamp option
ADV HID head lamp option
Emergency switch
Headlight low beams switch
Hood switch
Dark disconnect switch
Left front / rear turn signal switch
Right front / rear turn signal switch
Left Headlight low beams
Right Headlight low beams
Right Headlight high beams
Right Headlight high beams
Front left / right fog lamp
Room Taillight
Outdoor Left taillight
Outdoor Light taillight
Left front / rear turn signals
Right front / rear turn signals
Static bending left lamps
Static bending right lamp
DRL Left lamp
DRL right lamp
Trunk room lamp
Body resistance Cut control
Front left turn signal output
Front right turn signal output
Relay Control
Rear glass heat rays relay
Anti-theft alarm horn relay
Trunk lid relay
Room lamp relay
Front glass heat rays relay
Rear fog lamp relay
Headlight high beams relay
SJB protection
PCL (Programmable Current Limit) functions
PCL replaces the junction box function of protecting wires.
How to operate: If the lamp current exceeds the standard level, cut off the current to protect the lamp.
Lamp cut off time: 300ms or less.
Applied components: all lamp components controlled by SJB
Output the error code according to the error detection conditions.
OCL (Open Current Limit)
OCL detects the lamp open state and informs the user of it.
How to operate : Detect the current of the lamp and if it is below the standard level, change the lamp operation.
Applied components: 4 turn signal lamps
Output the error code according to the error detection conditions.
SJB fail safe function
When the MCU is out of order (not operating due to a physical or electrical shock from the outside), and IGN2 and head lamp low switch are on, SJB forces the head lamp low and exterior/interior lamps to turn on in order to secure the driver’s safety.
When the data transmission/reception fails due to a failed CAN communication line connected with SJB module (disconnection of both high and low line, high/low BAT short, high/low GND short), the head lamp low and interior/exterior tail lamps are forced to turn on if IGN2 is on and the head lamp low switch is on.
Auto Cut System of Dark Current
Description : It cuts automatically power to be provided with components for reducing useless dark current according to vehicle state.

SJB had 3 modes, "Normal Mode", "Sleep Mode", "Power Off Mode". Auto cut of dark current practice in "Sleep Mode".
"Sleep" condition : IG OFF, constant input switch, CAN network doesn't activate.
"Sleep" resolutive condition : Any switch inputs, CAN network activates, KEY ON, IGN ON
"Power OFF" condition : The setting time of timer which is used by cutting a load power expires.
"Normal Mode" : SJB function normally activates.
"Sleep Mode" : It is low power mode and activates for reducing electricity consumption of SJB or IPM. Auto cut of dark current function activates.
"Power OFF Mode" : Power of MCU and circumferential circuit is cut for minimizing electricity consumption. Operation stops.
The explanation - The auto cut of dark current

Before delivering to customer
Fuse switch OFF
All door close & RKE door lock or Constant switch state
(Auto cut of dark current scenario starts.)
After "sleep" state is for 20 min.
SJB power down(SJB dark current : 200 ?A) and cutting power of Lamp
/Body Load/Wake up

After delivering to customer
Fuse switch ON
All door close & Constant switch state : C_BAState=OFF
(Auto cut of dark current scenario starts.)
After "sleep" state is for 20 min.
SJB power down(SJB dark current : 200 ?A) and cutting power of Lamp Load
In case RKE door lock : C_BAState=ON & Trunk SW=CLOSE
(Auto cut of dark current scenario starts.)
After "Sleep" state 35s~65s (Waiting time of other unit : 30~60s + SJB
sleep counts 5s)
SJB Powerdown(SJB dark current : 200 ?A) and cutting power of
Lamp Load 

Problem when fuse switch setting is wrong
: If a fuse switch is set to OFF(Before delivering to customer) by a customer or technician and auto cut function of dark current activates, the following problems may occur
Related part
Door lock/unlock, trunk open don't activate by RKE.
(Wakeup of each module don't activate.)
Digital clock is reset.(Memory is reset.)
Digital clock
Audio setting values (volume, frequency setting) are reset.
(Memory is reset.)

* If fuse switch OFF(before delivering to customer) is set, power of BCM, Digital clock and audio is shut off.
Relay Box (Passenger Compartment) Components and Components Location
Component Location Interior Junction Block ...

Relay Box (Passenger Compartment) Repair procedures
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