Engine Overheat Troubleshooting |
Inspection |
Remedy |
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Visual inspection |
Inspect for shortage of coolant in reservoir tank . |
Reinspect after replenishing coolant. |
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Inspect for coolant pollution after removing radiator cap.
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Reinspect after replacing coolant. |
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Inspect for leakage and loose coolant hoses (radiator hose, heater hose,
oil cooler hose, etc.). |
Reinspect for leakage after reinstalling hoses and clamps. |
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Inspect for leakage on water inlet fitting mounting part. |
Reinspect for leakage after replacing O-ring. |
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Reinspect for leakage after tightening to the specified torque. |
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Inspect drive belt (for normal operation of water pump). |
Adjust drive belt tension or replace. |
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Inspect for leakage on water pump gasket mounting part. |
Reinspect for leakage after replacing gasket. |
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Reinspect for leakage after tightening to the specified torque. |
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Inspect for loose coolant temperature sensor, cooling fan connector and
pin. |
Reinstall loose connector. |
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Replace relevant part if connector pin is damaged. |
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Inspect operation status of cooling fan. - Check operation status by switching ON/OFF the heater control A/C.
|
Check mounting status of ground cable. |
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Diagnostic device |
Inspect self-diagnostic code using KDS/GDS. |
Check coolant temperature sensor, wiring, connector, etc. |
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Unit inspection |
Inspect water pump impeller. |
Replace water pump. |
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Inspect for foreign materials and status of thermostat valve. |
Inspect unit after removing foreign materials. |
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Inspect for stuck thermostat valve. - Immerse thermostat in water heated to over 95°C (203°F), then heat for at least 3 minutes to check valve lift.
|
Check valve lift. - Replace thermostat if valve lift is below specification or valve is stuck. |
Kia Niro 2017 (DE HEV) Service Manual: Manifold Absolute Pressure Sensor (MAPS) Description and operation
Description
Manifold Absolute Pressure Sensor (MAPS) is a speed-density type sensor installed
on the surge tank. It senses absolute pressure of the surge tank and transfers the
analog signal proportional to the pressure to the ECM. By using this signal, the
ECM calculates the inta ...
Kia Niro 2017 (DE HEV) Service Manual: Fuel Filler Cap Description and operation
Description
A ratchet tightening device on the threaded fuel filler cap reduces the chances
of incorrect installation, which seals the fuel filler. After the gasket on the
fuel filler cap and the filler neck flange contact each other, the ratchet produces
a loud clicking noise ind ...