i30 Owners Club

ISG - Idle stop and Go ~ Stopping and Starting conditions

Lorian · 4 · 4431

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Offline Lorian

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    • gb United Kingdom
      Midlands

  • Midlands, UK N-Line T-GDi
The follwoing conditional are all required for the engine to stop:

Clutch pedal released
Shift lever in neutral
The engine coolant temperature is not too low (Over 45 degree/60 degrees*)
External temperature more than than 3c*
The Catalyst Converter temperature not too low (over 200 degree).
Not inhibitor condition for operating strategy or engine fault
- TPS, CKPS, CMPS, ECTS, VSS, Battery sensor, ISCA, BBVPS, Neutral Switch, Clutch Switch
After fulfill OBD monitoring
Battery charge status is adequately high.
No 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 is off
Driver’s seat belt and Driver’s Door and hood are closed.
Battery temperature is between 2 to 60 degree.
Brake booster pressure not to low.
Cabin blower set to max.

The following conditions cause the engine to automatically restart:
Not inhibitor condition for operating strategy
- TPS, CKPS, CMPS, ECTS, VSS, Battery sensor, BBVPS, Neutral Switch, Clutch Switch
Brake booster vacuum pressure becomes low.
When the battery charge status becomes low.
A certain amount of time has passed after the air conditioning is switched On.
If the fan speed of the climate control system is maximum speed. (windscreen is fogged)
Vehicle speed is over 5kph by rolling down a hill.

*these items are descrepancies between various sources of information.


Offline eye30

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    • england England
      Wirral

  • Wirral, UK. - 1.4 Petrol Active - Aqua Blue
Just another load of techi stuff to go wrong

and after the warranty period, to diagnose and fix I would expect to be EXPENSIVE !!!
  • 1.4 Petrol Active I'm no expert, so please correct me if


Offline Lorian

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    • Posts: 3,459

    • gb United Kingdom
      Midlands

  • Midlands, UK N-Line T-GDi
Yes, ISG looks very complicated.

I guess the only reason you'd really want it in on the 1.6CRDi CW in the UK where it pushes it down from £120 to £30 a year vehicle excise duty.


Offline eye30

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    • Posts: 27,353

    • england England
      Wirral

  • Wirral, UK. - 1.4 Petrol Active - Aqua Blue

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