Kia Sportage: Relay Box (Passenger Compartment)

Components and Components Location

 Component Location

USE THE DESIGNATED FUSE AND RELAY ONLY

Circuit (I/P Junction Box)

USE THE DESIGNATED FUSE AND RELAY ONLY

Description and Operation

 Description

SJB (Smart Junction Box)

1. Specification

2. Rated Burden

3. System configuration

4. System block diagram

 1. Power input

1. B+1

2. B+2

3. B+3

4. IGN1

5. IGN2

 2. CAN

1. Tx

2. Rx

 3. Switch input

1. Driver door switch

2. Assist door switch

3. Rear door switch (LH)

4. Rear door switch (RH)

5. Driver door key unlock switch

6. Assist door key unlock switch

7. Driver door key lock switch

8. Assist door key lock switch

9. Hood lock state

10. Tailgate release switch

11. Tailgate open switch

12. Power window lock switch

13. Power window unlock switch

14. Driver door unlock state

15. Assist door unlock state

16. Rear door unlock state (LH)

17. Rear door unlock state (RH)

18. Driver seat belt switch

19. Assist seat belt switch

20. Rear seat belt switch (LH)

21. Rear center seat belt switch

22. Rear seat belt switch (RH)

23. Brake fluid switch

24. Parking brake switch

25. Hand brake switch

26. Shift lever reverse gear (MT option)

27. -

28. Headlamp low switch (M/F)

29. HID option

30. Wiper parking signal

 4. IPS output

1. Headlamp low (RH) - Power (B+2)

2. Headlamp high (RH) - Power (B+2)

3. External tail (RH) - Power (B+2)

4. Internal tail (LH-RH) - Power (B+2)

5. Dedicated DRL LH/RH - Power (B+2)

6. Backup lamp - Power (B+2)

7. Headlamp low (LH) - Power (B+3)

8. Headlamp high (LH) - Power (B+3)

9. Fog lamp (LH, RH) - Power (B+3)

10. External tail (LH) - Power (B+3)

 5. Internal relay

1. Door lock relay

2. Door unlock relay

3. Power window relay

4. Tailgate release relay

5. Burglar alarm start relay

 6. External relay

1. -

2. Rear defogger relay

3. Front deicer relay

4. Burglar horn relay

5. Rear wiper relay

5. Control function (Lamp)

1. Smart Junction Box (SJB) controls tail lamp, headlamp (low), headlamp (high) and front fog lamp output. And it diagnoses.
2. It controls lamp after receiving CAN signal from BCM.
3. It sends results of control state and diagnosis to BCM through CAN.

1. PWM (Pulse Width Modulation) control: Rated voltage control.

   If a battery voltage is over 13.2 +- 0.1 V, it controls IPS with PWM and prevents early bulb's burnt-out and II device.

   It controls bulbs with controlling IPS.

   A frequency is 80 +- 10 Hz (TBD) at controlling with PWM.

If a voltage is high, a bulb's life decreases. So, SJB keeps stable voltage to bulbs and ensures bulb's life.

2. PCL : Programmed Current Limit

If current flowed into a wire is larger than basic current which is designated to a wire, it controls IPS with PWM control or stops IPS.

3. Overheat diagnosis

If high current flows into SJB within short time like as a ground short, IPS blocks an output and protects wire and load.

6. Control function - Switch input

Movement explanation

1. It detects the switch state and transfers to BCM through CAN.
2. It detects the switch state in the sleep state and enables to SJB wakeup function.

7. Control function - relay

Movement explanation

1. It receives the power window relay control value from BCM though CAN and controls relays.
2. If C_PwdeMain (CAN signal) is ON, it makes power window relay output to ON.

   If C_PwdeMain (CAN signal) is not ON, it makes power window relay output to OFF.

8. Control function - CAN fail

SJB, in case CAN fail and IGN2 is ON, turns on head lamp (low), external tail lamp and internal tail lamp by force

9. Hardware protection function

In case MCU is in the Dead state, SJB checks the headlamp switch state. If IGN2 is ON and headlamp (low) switch is ON, it turns on headlamp (low) by force and protects driver.

Repair procedures

 Inspection

Fuse

1. Be sure there is no play in the fuse holders, and that the fuses are held securely.

2. Are the fuse capacities for each circuit correct?

3. Are there any blown fuses?

If a fuse is to be replaced, be sure to use a new fuse of the same capacity. Always determine why the fuse blew first and completely eliminate the problem before installing a new fuse.

SJB Connectors

Inspection

1. The SJB can be diagnosed by using the GDS. The SJB communicates with the GDS which then displays inputs and outputs along with codes.

2. To diagnose the SJB function, select the vehicle model, BCM and SJB.

3. To consult the present input/out value of SJB. "Current DATA". It provides information of SJB input/output conditions.

4. To perform functional test on SJB outputs, select "Actuation Test".

Removal

1. Disconnect the negative (-) battery terminal.

2. Remove the crash pad lower panel.

(Refer to the BD group - "Crash pad")

3. Remove the SJB (A) (Smart Junction Box) after removing bolt, nuts (2EA) and connectors.

Installation

1. Install SJB (Smart Junction Box).

2. Connect the SJB connectors.

3. Install the crash pad lower panel.

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