1.
Description : It cuts automatically power to be provided with load for reducing useless parastic current according to vehicle state.
General function : Interior Junction Box + some functions of BCM
It controls loads with CAN communication and IPS.
Main function
Low speed CAN communication(100 kbps)
Self diagnostics(Lamp open/short)
Fail safe(When MCU/CAN is fail, Head lamp / Tail lamp directly drive)
Protection of bulb over-voltage(PWM function)
Cut of Over-load and Short : PCL(Program Current Limit)
No. | Switch input | Value | Destination | Wakeup |
1 | IG1 | ON/OFF | - | YES |
2 | IG2 | ON/OFF | - | NO |
3 | Seat belt switch(Driver) | BELT/UNBELT | BCM | NO |
4 | Seat belt switch(Passenger) | BELT/UNBELT | BCM | NO |
5 | Seat belt switch(Rear left) | BELT/UNBELT | BCM | NO |
6 | Seat belt switch(Rear right) | BELT/UNBELT | BCM | NO |
7 | Seat belt switch(Rear center) | BELT/UNBELT | BCM | NO |
8 | Unlock State(Driver door) | LOCK/UNLOCK | BCM,SMK | YES |
9 | Unlock State(Passenger door) | LOCK/UNLOCK | BCM,SMK | YES |
10 | Unlock State(Rear left door) | LOCK/UNLOCK | BCM | YES |
11 | Unlock State(Rear right door) | LOCK/UNLOCK | BCM | YES |
12 | Driver door switch | CLOSE/OPEN | BCM,CLU,SMK | YES |
13 | Passenger door switch | CLOSE/OPEN | BCM,CLU,SMK | YES |
14 | Rear left door switch | CLOSE/OPEN | BCM,CLU,SMK | YES |
15 | Rear right door switch | CLOSE/OPEN | BCM,CLU,SMK | YES |
16 | Driver/Passenger door Key lock | OFF/LOCK | BCM | YES |
17 | Driver door Key unlock | OFF/UNLOCK | BCM | YES |
18 | Passenger door Key unlock | OFF/UNLOCK | BCM | YES |
19 | Driver window lock switch | OFF/LOCK | BCM | YES |
20 | Driver window unlock switch | OFF/UNLOCK | BCM | YES |
21 | Turn signal switch(Left) | ON/OFF | CLU | NO |
22 | Turn signal switch(right) | ON/OFF | CLU | NO |
23 | Hazard switch | ON/OFF | - | YES |
24 | Trunk switch | CLOSE/OPEN | BCM,CLU,SMK | YES |
25 | HID | HID/OFF | - | NO |
26 | Brake fluid sensor | ON/OFF | CLU | NO |
27 | Parking brake switch | ON/OFF | BCM,CLU | NO |
28 | Multifunction switch(Lighting) | ON/OFF | - | NO |
29 | Hood switch | OFF/OPEN | BCM | YES |
30 | Trunk release switch | ON/OFF | BCM,SMK | YES |
No | Relay output | Value | Type | Remarks |
1 | Auto cut | ON/OFF | Transistor | Auto cut of parastic current |
2 | Sound relay | ON/OFF | Transistor |
|
3 | Door lock relay | ON/OFF | LSD |
|
4 | Door unlock relay | ON/OFF | LSD |
|
5 | Power window main relay | ON/OFF | Transistor |
|
6 | Rear heater relay | ON/OFF | LSD |
|
7 | Front deicer relay | ON/OFF | LSD |
|
8 | Burglar alarm relay | ON/OFF | LSD |
|
9 | Burglar horn relay | ON/OFF | LSD |
|
10 | T/TURN and D/LOCK | ON/OFF | LSD |
|
11 | Trunk lid relay | ON/OFF | Transistor |
|
No | Lamp | Bulb capacity | PWM control | PCL detection | OCL detection |
1 | Head lamp High(Left) | 55 W | O | O |
|
2 | Head lamp Low(Left) | 55 W | O | O |
|
3 | Rear turn signal(Left) | 33 W |
| O | O |
4 | Front turn signal(Left) | 28 W |
| O | O |
5 | Head lamp High(Right) | 55 W | O | O |
|
6 | Head lamp Low(Right) | 55 W | O | O |
|
7 | Rear turn signal(Right) | 33 W |
| O | O |
8 | Front turn signal(Right) | 28 W |
| O | O |
9 | Tail lamp(Left, right) | 72 W |
| O |
|
10 | Interior tail lamp | 60 W |
| O |
|
11 | Front fog lamp(Left, right) | 70W(35W+35W) | O | O |
|
*PCL(Programmable Current Limit) : It detects the current of lamp. If a current exceed the standard value, it cuts the current of lamp.
*OCL(Open Circuit Limit) : It detects the current of lamp. If a current is below the standard value, it controls current of lamp.
Description : It cuts automatically power to be provided with load for reducing useless parastic current according to vehicle state.
SJB had 3 modes, "Normal Mode", "Sleep Mode", "Power Off Mode". Auto cut of parastic 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 parastic 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 parastic current
Before delivering to customer | Fuse Switch |
•All door close & RKE door lock or Constant switch state (Auto cut of parastic current scenario starts.) -After "sleep" state is for 20 min. -SJB power down(SJB parastic current : 200 μA) and cutting power of Lamp/Body Load/Wake up |  |
After delivering to customer | Fuse Switch |
•All door close & Constant switch state : C_BAState=OFF (Auto cut of parastic current scenario starts.) -After "sleep" state is for 20 min. -SJB power down(SJB parastic current : 200 μA) and cutting power of Lamp Load •In case RKE door lock : C_BAState=ON & Trunk SW=CLOSE (Auto cut of parastic current scenario starts.) -After "Sleep" state 35s~65s (Waiting time of other unit : 30~60s + SJB sleep counts 5s) -SJB Powerdown(SJB parastic current : 200 μA) 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 parastic current activates, below problems may happen.
Symptom | Related part |
•Door lock/unlock, trunk open don't activate by RKE. (Wakeup of each module don't activate.) | BCM |
•Digital clock is reset.(Memory is reset.) | Digital clock |
•Setting value of audio(Volume, Frequency setting) is reset. (Memory is reset.) | Audio |
*If fuse switch OFF(before delivering to customer) is set, power of BCM, Digital clock and audio is shut off.
