Hyundai Sonata: Relay Box (Passenger Compartment). Repair procedures - Fuses And Relays - Body Electrical System - Hyundai Sonata YF 2011-2017 Service ManualHyundai Sonata: Relay Box (Passenger Compartment). Repair procedures

Fuse Inspection

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.

Relay Inspection

Door Lock
1.
There should be continuity between the No.38 terminal in the I/P-E and No.21(or 34) terminal in the I/P-A when power and ground are connected to the No.38 terminal in the I/P-E and ground.
2.
There should be no continuity between the No.38 terminal in the I/P-E and No.21(or 34) terminal in the I/P-A when power is disconnected.

Door Unlock
1.
There should be continuity between the No.38 terminal in the I/P-E and No.22(or 35) terminal in the I/P-A when power and ground are connected to the No.38 terminal in the I/P-E and ground.
2.
There should be no continuity between the No.38 terminal in the I/P-E and No.22(or 35) terminal in the I/P-E when power is disconnected.

Trunk Lid Open
1.
There should be continuity between the No.1 terminal in the I/F-C and No.36 terminal in the I/F-A when power and ground are connected to the No.1 terminal in the I/F-C and ground.
2.
There should be no continuity between the No.1 terminal in the I/F-C and No.36 terminal in the I/F-A when power is disconnected.


Removal

Passenger Compartment Junction Box (SJB)
1.
Disconnect the negative(-) battery terminal.
2.
Remove the crash pad lower panel (A).
(Refer to the BD group - "Crash pad")

3.
Disconnect the connectors (A) from the fuse side of the smart junction box.

4.
Remove the smart junction box after loosening the mounting nuts (2EA).
5.
Disconnect the connectors from the back side of the smart junction box.

Installation

1.
Install the smart junction box.
2.
Install the crash pad lower panel.
3.
Check that all system operates normally.

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