Hyundai Sonata: Relay Box (Engine Compartment). Description and Operation - Fuses And Relays - Body Electrical System - Hyundai Sonata YF 2011-2018 Service ManualHyundai Sonata: Relay Box (Engine Compartment). Description and Operation

Description

Network Configuration
The Network of the SJB(Smart Junction Box) consists of Low speed CAN as shown in the following figure.

Termination Resistor
The SJB has CAN termination resistor. It is possible that CAN termination resistor value is changed by number of CAN controller. The termination resistor value of the SJB is 510 Ω.

Function

Function Requirements
The BCM controls IPS and relay on the SJB. For example, if BCM requests head lamp low beam control, then BCM requests related lamp control at one time.
NO
BCM Control Relay
1
Door Lock Relay
2
Door Unlock Relay
3
Drive Door Unlock Relay (NA, AUS)
4
Power Window Relay
5
Trunk Release Relay
6
Rear Defogger Relay
7
Front Deicer Relay
8
Burglar Alarm Start Relay
9
Burglar Horn Relay

NO
BCM Control IPS
1
Head Lamp Low
2
Head Lamp High
3
Front Fog Lamp
4
Tail Lamp EXT
5
Tail Lamp INT
6
Turn Signal Front LH
7
Turn Signal Front RH
8
Turn Signal Rear LH
9
Turn Signal Rear RH

Signal Flow Diagram
This chapter defines signal between SJB and peripheral electrical apparatus in the form of signal flow diagram. Control of the IPS and relay is required by BCM. Following figure expresses power source that is operating power condition
NO
Switch Signal
1
Front Left Door switch
2
Front Right Door switch
3
Rear Door LH switch
4
Rear Door RH switch
5
Driver Key Unlock switch
6
Assist Key Unlock switch
7
Driver Key Lock switch
8
Assist Key Lock switch
9
Hood switch
10
Trunk Release switch
11
Trunk Open Status switch
12
Power Window Door Lock switch
13
Power Window Door Unlock switch
14
Driver Door Unlock Status
15
Assist Door Unlock Status
16
Rear Door LH Unlock Status
17
Rear Door RH Unlock Status
18
Driver Seat Belt switch
19
Assist Seat Belt switch
20
Canada DRL Option
21
HID Option
22
Hazard switch
23
Turn Signal LH switch
24
Turn Signal RH switch

NO
Relay Control Signal
1
Door Lock Relay
2
Door Unlock Relay
3
Drive Door Unlock Relay (NA, AUS)
4
Power Window Relay
5
Trunk Release Relay
6
Rear Defogger Relay
7
Front Deicer Relay
8
Burglar Alarm Start Relay
9
Burglar Horn Relay
10
Crash Sensor Status

NO
IPS Control Signal
1
Tail INT
2
Tail EXT
3
Front Fog Lamp
4
Head Lamp Low
5
Head Lamp High
6
Canada DRL
7
Hazard from BCM

B/Alarm Start Relay Control

B/Alarm Horn Relay Control

Door Switch Input Control

Door Lock Control

Door Unlock Status Control

DRL Ground Control

Door Lock Switch Input Control

Power window Relay Control

Rear Defogger & Front Deicer Relay Control

Seat Belt Switch Input Control

Trunk Switch Input Control

Hood Switch Input Control

Power Window Lock/unlock Switch Input Control

IPS Lamp Activity

IPS Lamp Command
Function Definition

Turn Signal
Function Definition

1.
Turn Signal by ‘ Turn Signal Lh switch’ and ‘ Turn Signal Rh switch’ works during ‘Ign1=ON’ or ‘ IGN2=ON’.
2.
Lane Change function (3 times blinking) works when ‘ON time’ of ‘Turn signal left switch’ or ‘Turn signal right switch’ is shorter than 1.8sec. During double blinking, it blinks 4 times.
3.
Lane change function would be immediately stopped when opposite direction switch or ‘ Hazard switch’ is ON.
4.
Hazard function by ‘HAZARD from BCM’ has priority to Switch input.
5.
Diagnosis for ‘Open Load’ and ‘Short to GND’ should be applied to each load during operation when ‘Ign1=ON’ or ‘ IGN2=ON’.
6.
During ‘ Turn Signal Lh switch = ON’ or ‘ Turn Signal Rh switch = ON’, Double blinking function starts even 1 load is ‘Open Load’ condition.
7.
When ‘Short to GND’ is detected, power supply to the related load would be stopped.
8.
When ‘Open Load’ or ‘Short to Ground’ is detected, this diagnosis condition would be kept before one of ‘ Ign1=OFF’, ‘ IGN2=OFF’ or ‘ Turn Sigma; Lh switch = OFF’, ‘ Turn Signal Rh switch = OFF’ and ‘ Hazard switch = OFF’ is set.
9.
Normal Blinking Period: 85±10 period/min (duty 50%±5%)
10.
Double Blinking Period: 157±10 period/min (duty 50%±5%). (But, initial blinking is normal blinking)
Blinking
-
CAN message controls turn signal blinking until ‘ HAZARD from BCM = INACTIVE’. ON/OFF Period and Duty ratio are set by BCM.
-
Blinking period by ‘Hazard Switch’ and ‘Turn Signal Lever Switch’ would be affected by turn signal diagnosis.
-
Blinking by CAN message has priority to blinking by ‘Hazard Switch’ and ‘Turn Signal Lever Switch’
-
Blinking by switch should be stopped immediately and blinking would be controlled by CAN if ‘ HAZARD from BCM = ON/OFF’ until ‘ HAZARD from BCM = INACTIVE’.
-
Blinking is repetitive on/off control of turn signal with 50±5% duty ratio.

-
Blinking Period is as follows.
duty 50%±5% Normal Blinking Period : 85±10period/min, duty 50%±5%
duty 50%±5% Double Blinking Period : 157±10period/min, duty 50%±5%
-
Blinking operation priority is as follows.
from BCM = ON’ ‘ HAZARD from BCM = OFF’ or ‘ HAZARD from BCM = ON’
‘ Hazard switch = ON’
Signal Rh switch = ON’ ‘ Turn Signal Lh switch = ON’ or ‘ Turn Signal Rh switch = ON’
-
Double blinking by ‘open load’ during normal blinking starts from next period until double blinking condition is cancelled.
-
Double Blinking starts by the condition below when Ign1=ON or IGN2=ON.
Signal Left Side will start double blinking when either Left Front or During Turn Signal Lh switch = ON, Turn Signal Left Side will start double blinking when either Left Front or Left Rear Lamp is open condition.
Signal Right Side will start double blinking when either Right Front During Turn Signal Rh switch = ON, Turn Signal Right Side will start double blinking when either Right Front or Right Rear Lamp is open condition.
will start double blinking when at least 3 bulbs are open condition. During Hazard switch = ON, both lamps will start double blinking when at least 3 bulbs are open condition.
-
Timing Chart

Turn Signal Function By CAN
-
CAN controls Turn Signal Lamp when RKE Lock/Unlock, Panic, Alarm work.
-
CAN has priority to other turn signal controls apart from Ignition condition.
-
When hazard from BCM is delivered, all Turn Signal Lamp control should be stopped immediately and needs to follow CAN message.
-
Hazard from BCM controls all turn signal lamps.
-
All turn signal lamps are turned off when ‘Hazard from BCM = Inactive or OFF’. But inactive means that there’s no more control from BCM not switch.
-
When CAN fails, Hazard from BCM should be inactive.
-
Truth Table
NO
Hazard from BCM
Turn left front
Turn left rear
1
Inactive
-
-
2
OFF
OFF
OFF
3
ON
ON
ON

-
Timing Chart

Hazard Function
-
When Hazard Switch = ON, Left and Right side turn signal lamps should be blink apart from Ignition Switch.
-
Hazard Switch has priority to Turn Signal Lever switch.
-
Truth Table
NO
Hazard
Turn left front
Turn left rear
Turn right front
Turn right rear
1
OFF
OFF
OFF
OFF
OFF
2
ON
Blinking
Blinking
Blinking
Blinking

-
Timing Chart


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