Hyundai Kona: ISG (Idle Stop & Go) System / DC/DC Converter Repair procedures

Removal
[200W]
1.
Turn the ignition switch OFF and disconnect the battery negative (-) terminal.
2.
Remove the crash pad lower panel.
(Refer to Body - "Crash Pad Lower Panel")
3.
Disconnect the DC/DC converter connector.
4.
Remove the DC/DC converter (B) after removing the nuts (A).

[450W]
1.
Turn the ignition switch OFF and disconnect the battery negative (-) terminal.
2.
Remove the heater & A/C control unit.
(Refer to Heating, Ventilation and Air Conditioning - "Heater & A/C Control Unit")
3.
Disconnect the DC/DC converter connector (A).
4.
Remove the DC/DC converter (B) after removing the screw & nuts.

Installation
  
After reconnecting the battery negative cable, ISG function does not operates until the system is stabilized, about 4 hours. If disconnecting the negative (-) battery cable from the battery during repair work for the vehicle equipped with AMS function, Battery sensor recalibration procedure should be performed after finishing the repair work.
1.
Install in the reverse order of removal.
DC/DC Converter Schematic diagrams
Circuit Diagram [200W] [450W] ...

ISG OFF Switch Description and operation
Description The ISG OFF switch on the floor console can be used to deactivate the ISG function. ...

Other information:

Hyundai Kona (OS) 2018-2021 Service Manual: Specifications
Specifications Purge Control Solenoid Valve (PCSV) ▷ Specification Item Specification Coil Resistance (Ω) 18.5 - 22.5 [20°C (68°F)] Tightening Torques Item kgf.m ...

Hyundai Kona (OS) 2018-2021 Service Manual: Ignition Coil Description and operation
Description An ignition coil is an induction coil in an engine's ignition system which transforms the battery's low voltage to the high voltage needed to create an electric spark in the spark plugs to ignite the fuel. Coils have an internal resistor while others rely ...

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