Relay Box (Interior) Description and Operation

Description

1. 1
   Specification

   Item	Requirement	NOTE
   Rated Voltage	12 V DC	X
   Voltage range	8 ~ 16 V DC	Normal operation within this range
   Storage temperature	-40 °C ~ +95 °C	X
   Operating Temperature	-30 °C ~ +85 °C	X
   Operating humidity	85%	Printed circuit board, moisture insulation, coating, etc.
   Dark Current	Max. 200 µA	All loads open
   Operating Voltage Range	8 ~ 16 V DC	Must activate normally within the normal range
   Maximum humidity	85%	Adjusted together with parts requiring insulation, such as printed circuit board, moisture insulation, coating, etc.
   Insulation resistance	There must be no fire caused by short circuits

2. 2
   Rated Load

   Item	Rated Load
   Low beam headlamp, left	55 W
   Low beam headlamp, right	55 W
   High beam headlamp, left	60 W (max.)
   High beam headlamp, right	60 W (max.)
   Left Rear Lamp	41 W (max.)
   Rear combination lamp, right	31 W (max.)
   Front fog lamp, left + right	54 W
   Interior Lamp	45 W
   B/Alarm starter relay coil control	0.9 W
   RR FOG relay coil control	0.6 W
   Liftgate latch or luggage compartment lamp (liftgate power) relay coil control	0.6 W
   Backup relay coil control	0.45 W
   Rear wiper relay coil control (external)	12 W (max. output)
   B/Horn relay coil control (external)	12 W (max. output)
   RR.HTD relay coil control (external)	12 W (max. output)
   Front de-icer relay coil control (external)	12 W (max. output)

3. 3
   Block Diagram

   

4. 4
   Main functions of SJB

   1. Lamp control and wire protection through IPS.
   2. When the reference voltage is exceeded, normal PWM voltage control prevents loss or damage of the lamp.
   3. CAN output for switching signal input.
   4. Diagnosis by CAN (short to ground, open circuit)
   5. Fail-safe lamp control.

   NO	Section	Contents
   1	Input SW	Receives switch input and sends switch status as a CAN message to each module.
   2	Lamp Control (IPS)	Receives commands from the BCM as a CAN message to control lamps via IPS
   3	Internal Relay Control	Receives commands from the BCM as a CAN message and controls relays in the IP Box
   		T / Gate Latch, B / Alarm Start, Back-up, Rear Fog Lamp
   4	External Relay Control	Receives commands from the BCM as a CAN message and controls relays outside the IP Box
   		B / Horn, Rear Wiper Motor, Rear Heater, Front Anti-Icer
   5	Low Power Consumption Mode (Sleep Mode)	When the CAN message or switch input does not change for 5 seconds, the unit enters low power consumption mode (sleep mode).
   6	Wake-up Mode	When a CAN message or switch input changes in low power consumption mode, the unit returns to normal mode.
   7	Output Status Transmission	Output status of lamps and rear fog lamps is sent to the BCM as a CAN message
   8	HW Fail-Safe	When the MCU fails and the headlamp low beam switch is turned on, the headlamp low beam is activated.

5. 5
   Network

   

   

6. 6
   CAN Input and Output Flow