Hyundai Ioniq (AE): Hybrid Motor Assembly / Description and operation
Hybrid motor system is equipped with two electric motors.
These motors include the drive motor and the HSG that plays the role of starter motor and alternator (generator).
The drive motor moves the vehicle, reduces the noise, vibration and harshness (NVH), and improves fuel efficiency.
The drive motor supplements the engine power when the driver press the accelerator pedal or when the vehicle is running in the fuel efficiency mode.
In addition, the drive motor plays the role of an alternator (generator) when decelerating or braking to charge the high-voltage battery.
The HSG performs restart/cold start of the engine while the vehicle is running, or charges the high-voltage battery.


Component location1. HPCU (Hybrid Power Control Unit)(LDC+MCU+HCU+Reservoir)2. Hybrid drive motor3. Hybrid starter generator (HSG)4. Electrical radiator5.
Other information:
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.
Replacement1.Disconnect the negative (-) battery terminal. 2.Remove the heater and blower assembly.(Refer to Heater - "Heater Unit") 3.Loosen the mounting screws and remove the driver's temperature control actuator (A).4.Remove the heater core cover (A) after loosening the mounting screws.