KIA Niro: Hybrid Starter Generator(HSG)

Component location

  1. HPCU (Hybrid Power Control Unit) (LDC+MCU+HCU+Reservoir)
  2. Hybrid drive motor
  3. Hybrid starter generator (HSG)
  4. Electrical radiator
  5. Electric water pump (EWP)




  1. Inspect the line to line resistance using mΩ tester.

  1. Inspect the temperature sensor resistance.

  1. Inspect the resolver sensor resistance.

  1. Inspect the insulation resistance.




  • Be sure to read and follow the "General Safety Information and Caution" before doing any work related with the high voltage system. Failure to follow the safety instructions may result in serious electrical injuries.
  • Be sure to shut off the high voltage circuit according to the "High Voltage Shut-off Procedures" before doing any work related with the high voltage system to avoid serious electrical injuries.
  1. Shut off the high voltage circuit.

    ( Refer to Hybrid Motor System - "High Voltage Shut-off Procedure")

  2. Drain the coolant from the hybrid cooling system.

    (Refer to Hybrid Motor Cooling System - "Coolant")

  3. Remove the air cleaner assembly.

    (Refer to Engine Mechanical System - "Air Cleaner")

  4. Remove the drive belt.

    (Refer to Engine Mechanical System - "Drive Belt")

  5. Remove the drive belt tensioner.

    (Refer to Engine Mechanical System - "Drive Belt Tensioner")

  6. Remove the idler.

    (Refer to Engine Mechanical System - "Idler")

  7. Disconnect the HSG connector (A).

  1. Disconnect the cooler hose (A) from the HSG.

  1. Remove the intake manifold.

    (Refer to Engine Mechanical System - "Intake Manifold")

  2. Loosen the HSG mounting nut (A) and bolt (B).

Tightening torque : 44.1 - 49.0 N*m (4.5 - 5.0 kgf*m, 32.5 - 36.2 lb*ft)

  1. Remove the HSG after removing the HSG bracket (A).

Tightening torque : 55.9 - 60.8 N*m (5.7 - 6.2 kgf*m, 41.2 - 44.8 lb*ft)



  1. Install in the reverse order of removal.


  • Be careful not to damage other hoses nearby when tightening the clamp.
  • Install the clamp in the specified direction to prevent interference with surrounding components
  1. Perform the procedure below after installing.

(1) Refill the hybrid cooling system with coolant and bleed air from the hybrid cooling system using KDS.

(Refer to Hybrid Motor Cooling System - "Coolant") (2) Perform the engine clutch / motor resolver adaptation using the KDS.

Hybrid Motor Control System


     Hybrid Motor Control System

    Description The Hybrid Power Control Unit (HPCU), composed of various components, is the core device among the Power Electronics devices that acts as the brain. It comprises of the Hybrid Control Unit (HCU), an inverter Motor Control Un

     Resolver Sensor | Motor Temperature Sensor

    Description The accurate position of the rotor must be known at all times to ensure maximum output control of the motor. Part Circuit Diagram Hybrid Drive Motor HSG Resolver Sensor Repair procedures Inspection Hybrid Drive Motor


     Vehicle to load (V2L)

    V2L is the system that provides AC power using the high voltage battery for driving to operate several electronical products. A: Electric Vehicle EV Charge Transfer Select EV ? EV Charge Transfer on the screen. You can set the batt

     Safety Plug Description and operation

    Description Safety Plug is installed on the rear side of the high voltage battery and it can mechanically shut the high voltage circuit off when servicing the high voltage system. (i.e. High Voltage Battery, Power Relay Assembly, HPCU, BMS ECU