Body Electrical System
Relay Box (Interior) Repair Procedures
In this manual: Body Electrical System
13steps
~78min
3/5difficulty
Done 0 of 13
Inspection
Fuse- Make sure that there is no play in the fuse holders and that the fuses are securely installed.
- Is the rating of the fuse specified correctly for each circuit?
- Check for blown fuses. If a fuse must be replaced, always use a new fuse of the same capacity. Always determine why the fuse blew first and fully resolve the problem before installing a new fuse.

Inspection
- The SJB can be diagnosed using GDS. The SJB communicates with GDS, which then displays the input and output data along with the codes.
- To diagnose the SJB function, select the vehicle model, BCM and SJB.

- To view the SJB input/output current value, select "Current DATA". It provides information on the SJB input/output conditions.

- To perform a functional check of the SJB outputs, select "Actuation Test".

Removal
- Disconnect the negative (-) battery terminal.
- Remove the lower crash pad panel. (Refer to Group BD - "Crash Pad")
- Remove the SJB (A) (Smart Junction Box) after removing the bolts, nuts and connectors.

Installation
- Install the SJB (Smart Junction Box).
- Connect the SJB connectors.
- Install the emergency pad lower panel.
Test yourself
A quick Hyundai Tucson LM quiz: every answer comes with an explanation and a link to the manual page.
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