Hyundai Sonata LF Quiz
Body Electrical System

Relay Box (Engine Compartment) Repair Procedures

In this manual: Body Electrical System
General Information — 9Engine Mechanical System — 90Engine Electrical System — 58Emission Control System — 24Engine Control System/Fuel System — 114Drive Shaft and Axle — 15Suspension System — 35Steering — 19Restraints — 50Brake System — 54Body (Interior and Exterior) — 213Body Electrical System — 241Heating, Ventilation, and Air Conditioning — 56DCT (Dual Clutch Transmission) System — 52
21steps
~126min
4/5difficulty
Done 0 of 21

Inspection

  1. Disconnect the negative (-) battery terminal.
  2. Remove the relay from the engine compartment relay box.
  3. Starter Relay
  4. Defogger Relay
  5. Headlamp Relay (High Beam)
  6. Fan Relay
  7. Outlet Relay
  8. E-CVVT Relay
  9. There should be continuity between terminals No. 30 and No. 87 when battery voltage and ground are applied to terminals No. 85 and No. 86.
  10. There should be no continuity between terminals No. 30 and No. 87 when power is off. Engine Room Relay Block
  11. Rear Defogger Relay
  12. Cooling Fan Relay
  13. Cooling Fan Relay
  14. There should be continuity between terminals No. 30 and No. 87 when battery voltage and ground are applied to terminals No. 85 and No. 86.
  15. There should be no continuity between terminals No. 30 and No. 87 when battery voltage is disconnected.
  16. Disconnect the negative (-) battery terminal.
  17. Install the metal core PCB block (A) after inserting the 4 hooks (B) into the block assembly.
  18. Remove the metal core PCB block after disconnecting the connector.
  19. Make sure that there is no play in the fuse holders and that the fuses are securely installed.
  20. Is the rating of the fuse specified correctly for each circuit?
  21. Is any fuse blown?
    If a fuse must 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.
Power Relay (Type A) Check continuity between terminals. Power Relay (Type B) Check continuity between terminals. Metal Core PCB Block Fuse Multi Fuse Engine Room Fuse is designed to optimize the package.
  • The multi fuse must be replaced as an assembly if only one fuse is damaged.
  • When replacing the multi fuse, refer precisely to the "Engine Compartment - Component Location" diagram.
  • Use the correct ratings of the multi fuses for each circuit.

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