Hyundai Ioniq (AE): Hybrid Motor Cooling System / Description and operation

Description
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Various devices containing semiconductor are used in HPCU.
And heat is generated when the HPCU operates.
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These devices are connected to the high voltage directly and cause heat hotter than the electrical devices of an internal combustion engine.
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Overheat reduces the efficiency of control devices, hindering operational control.
Also, the semiconductor elements may melt under excessive heat (The device may remain constantly turned on.)
Such overheat may become the cause of vehicle malfunction.
Hybrid Motor Cooling System Circuit

    Specifications Cooling system CoolantSpecified coolant LLC - 10 Quantity Approx. 3.2L (0.85 US gal, 3.38 US qt, 2.82 lmp qt.)

    Other information:

    Hyundai Ioniq (AE) 2017-2022 Service & Repair Manual: Photo Sensor. Repair procedures

    Inspection1.Turn the ignition switch ON.2.Connect the GDS.3.Emit intensive light toward the photo sensor using a lamp, and check the output voltage change.4.The voltage will rise with higher intensive light and reduce with lower intensive light.1. Auto light signal2.

    Hyundai Ioniq (AE) 2017-2022 Service & Repair Manual: Auto Defoging Actuator. Repair procedures

    Inspection1.Turn the ignition switch OFF. 2.Disconnect the auto defogging connector. 3.Verify that the auto defogging actuator operates to the open position when connecting 12V to terminal 3 and grounding terminal 4. Verify that the auto defogging actuator operates to the close position when connected in reverse.

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