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Hyundai Tucson: Engine Overheat/ Troubleshooting

Hyundai Tucson - Fourth generation (NX4) - (2020-2023) - Workshop Manual / Engine Mechanical System / Cooling System / Engine Overheat/ Troubleshooting

Components

  1. Water pipe
  2. Water hose
  3. Integrated thermal management module (ITM)
  4. Heater pipe
  5. Turbo charger coolant hose
  6. Heater hose
  7. Heater pipe A
  8. Heater pipe A gasket
  9. Oil cooler hose A
  10. Oil cooler pipe
  11. Oil cooler hose B
  12. Water inlet fitting
  13. Water inlet fitting O-ring

Engine Overheat/ Troubleshooting

Visual inspection

Inspection/ Remedy

  • Inspect for shortage of coolant in reservoir tank ./ Reinspect after replenishing coolant.
  • Inspect for coolant pollution after removing radiator cap.

WARNING

Be careful when removing radiator cap from overheated vehicle. /  Reinspect after replacing coolant.

  • Inspect for leakage and loose coolant hoses (radiator hose, heater hose, oil cooler hose, etc.)./ Reinspect for leakage after reinstalling hoses and clamps.
  • Checking for coolant leaks of Integrated Thermal Management Module (ITM)/ Replace O-ring or replace the integrated thermal management module (ITM) if required
  • Inspecting the heater pipe connection to find coolant leaks./ Reinspect for leakage after reinstalling hoses and clamps.
  • Inspect for leakage on water inlet fitting mounting part./
  • Reinspect for leakage after replacing Oring.
  • Reinspect for leakage after tightening to the specified torque.
  • Inspect drive belt (for normal operation of water pump)./ Adjust drive belt tension or replace.
  • Inspect for leakage on water pump gasket mounting part./
  • Reinspect for leakage after replacing gasket.
  • Reinspect for leakage after tightening to the specified torque.
  • Inspect for loose coolant temperature sensor, cooling fan connector and pin/
  • Reinstall loose connector.
  • Replace relevant part if connector pin is damaged.
  • Inspect operation status of cooling fan.

    Check operation status by switching ON/OFF the heater control A/C.

WARNING

Will not operate in cold ambient temperature./ Check mounting status of ground cable.

Diagnostic device

Inspection/ Remedy

  • Inspect self-diagnostic code using diagnostic tool./ Check coolant temperature sensor, wiring, connector, etc.

Unit inspection

Inspection/ Remedy

  • Inspect water pump impeller./ Replace water pump.

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    Information