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Hyundai Veloster: Relay Box (Passenger Compartment). Description and Operation - Fuses And Relays - Body Electrical System - Hyundai Veloster 2010-2018 Service ManualHyundai Veloster: Relay Box (Passenger Compartment). Description and Operation

First generation (2011–present) / Hyundai Veloster 2010-2018 Service Manual / Body Electrical System / Fuses And Relays / Relay Box (Passenger Compartment). Description and Operation

Description

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.

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