Hyundai Kona: ISG (Idle Stop & Go) System / Schematic diagrams

Operation Condition for the ISG function
Operation Condition for the ISG function
After every engine start, the function is automatically active and on stand-by. The ISG OFF switch can be used to deactivate the function manually until the next terminal change. Pressing the switch is confirmed by an lamp lighting up.
1. Idle Stop (Idle → Stop) Condition
▶ Common Condition : Neutral Status & Clutch Pedal Released
Conditions Required
The engine coolant temperature is not too low (Over 45 degree).
Not DPF regeneration
Not inhibitor condition for operating strategy or engine fault
CKPS, CMPS, ECTS, VSS, Battery sensor, BBVPS, Neutral Switch, Clutch Switch, APS, Injector
Battery charge status is adequately high.
Not communication line error  - LIN, CAN
Vehicle speed less than 5kph
Vehicle speed over 10kph at least once after key starting or idle starting
ISG OFF switch off
Driver's seat belt and Driver's Door and hood are closed.                                 
Battery temperature is between 2 to 55 degree.
Brake booster pressure not to low.
Not Blower max.

▶ Common Condition : Neutral Status & Clutch Pedal Pressed
Conditions Required
Not inhibitor condition for operating strategy or engine fault
CKPS, CMPS, ECTS, VSS, Battery sensor, Neutral Switch, Clutch Switch, APS
Not communication line error  - LIN, CAN
Driver's seat belt and Driver's Door or hood are closed.
Engine stalled, then changed gear position (engaged → neutral) and pressed clutch pedal.

2. Idle Start (Stop → Start) Condition
  
If error occurred in the idle stop status, it is possible to start the engine by the key only.
3. Auto-starting (Stop → Start) Condition
The engine will start automatically without the driver's action if any of the following occurs:
▶ Common Condition : Neutral Status & Clutch Pedal Released
Conditions Required
Not inhibitor condition for operating strategy
TPS, CKPS, CMPS, ECTS, VSS, Battery sensor, BBVPS, Neutral Switch, Clutch Switch  
Brake booster vacuum pressure is low.
When the battery charge status is low.
A certain amount of time has passed after the air conditioning is On.
Vehicle speed is over 5kph by rolling down a hill.
Blower Max.

  
ISG system deactivation by fault
Fault in communication line (LIN/CAN)
Fault neutral switch
Fault brake booster vacuum pressure sensor
Fault clutch switch
When the ISG related sensors or system error occurs, the ISG OFF switch lights up.
Especially when the battery sensor is replaced or reinstalled, the vehicle must be placed in the ignition switch OFF for about 4 hours for recalibration.
The ISG function is operated about 4 hours later normally.
  
When the engine is in Idle stop mode, it's possible to restart the engine without the driver taking any action.
Before leaving the car or doing anything in the engine room area, stop the engine by turning the ignition key to the LOCK position or removing it.
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