Auto
cut system of dark current

1. |
Description : It cuts automatically power to
be provided with load for reducing unnecessary dark current
according to vehicle state.

|
2. |
SJB had 3 modes, "Normal Mode", "Sleep
Mode", "Power Off Mode". Auto cut of dark current practice in "Sleep
Mode".
A. |
"Sleep" condition : IG OFF, constant
input switch, CAN network doesn't
activate. |
B. |
"Sleep" resolutive condition : Any
switch inputs, CAN network activates, KEY ON, IGN
ON |
C. |
"Power OFF" condition : The setting
time of timer which is used by cutting a load power
expires. |
D. |
"Normal Mode" : SJB function normally
activates. |
E. |
"Sleep Mode" : It is low power mode
and activates for reducing electricity consumption of SJB or
IPM. Auto cut of dark current function
activates. |
F. |
"Power OFF Mode" : Power of MCU and
circumferential circuit is cut for minimizing electricity
consumption. Operation
stops. | |
3. |
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 μA) 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 μA) 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 μA) and cutting power of Lamp
Load
|

|
|
4. |
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, 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. |