Hyundai Sonata: Fuses And Relays / Relay Box (Engine Compartment) Repair procedures

Hyundai Sonata LF 2014-2019 Service Manual / Body Electrical System / Fuses And Relays / Relay Box (Engine Compartment) Repair procedures

Inspection
1.
Disconnect the negative (-) battery terminal.
2.
Pull out the relay from the engine compartment relay block.
Power Relay (Type A)
Check for continuity between the terminals.
1)
Start relay
2)
Deicer relay
3)
Head lamp (high) relay
4)
Blower relay
5)
Power outlet relay
6)
E-CVVT relay

1.
There should be continuity between the No.30 and No.87 terminals when power and ground are connected to the No.85 and No.86 terminals.
2.
There should be no continuity between the No.30 and No.87 terminals when power is disconnected.
Engine Room Relay Block

Power Relay (Type B)
Check for continuity between the terminals.
1)
Rear heated relay
2)
Cooling fan relay
3)
Cooling fan relay

1.
There should be continuity between the No.30 and No.87 terminals when power and ground are connected to the No.85 and No.86 terminals.
2.
There should be no continuity between the No.30 and No.87 terminals when power is disconnected.

Metal Core PCB Block
1.
Disconnect the negative (-) battery terminal.
2.
Put up the metal care PCB block (A) after push 4 hooks (B) in the block assembly.

3.
Remove the metal care PCB block after disconnet the connector.
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.
Multi Fuse
Engine room fuse is to optimize the package.

   
-
Multi fuse has to replace in the mass when it damaged only one fuse.
-
When replacing the multi fuse, refer to the "Engine compartment - component location" diagram exactly.
-
Use the multi fuse capacities for each circuit correctly.
Relay Box (Engine Compartment) Components and Components Location
Component Location [Engine room junction block] [Metal Core Block (PCB)] ...

Relay Box (Passenger Compartment) Components and Components Location
Component Location [Interior Junction Block] ...

Other information:

Hyundai Sonata LF 2014-2019 Service Manual: CVVT (Continuously Variable Valve Timing) System Description and Operation
Description Continuous Variable Valve Timing (CVVT) system advances or retards the valve timing of the intake and exhaust valve in accordance with the ECM control signal which is calculated by the engine speed and load. By controlling CVVT, the valve over-lap or under-lap occurs, which m ...

Hyundai Sonata LF 2014-2019 Service Manual: Rear Parking Assist System Switch Repair procedures
Removal 1. Disconnect the negative (-) battery terminal. 2. Remove the console upper cover. (Refer to Body - "Floor Console Assembly") 3. Remove the rear curtain switch (A) after loosening the mounting screws. Installation 1. Install the switch assembly in the console upper cover. ...

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