Idle Stop and Go (ISG) explained - Kia Forum
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#1 (permalink) Old 08-18-2011, 10:43 AM
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Default Idle Stop and Go (ISG) explained

courtesy of KGIS here's a condensed version of how ISG functions

Idle Stop and Go (ISG) Description

Idle Stop and Go (ISG) function automatically switches off the engine when the car is at a standstill and starts it again as soon as the brake pedal is released. This not only reduces fuel consumption, it also lowers emissions. Idle Stop and Go (ISG) function also has a built-in sensitivity to driving safety and comfort.
The engine is not switched off if certain conditions relating to safety and comfort have not been fulfilled (for example, when the engine oil is still cold, when the battery is running low or when the outside temperature is below 3º C or 37F). It can be deactivated by pressing the ISG OFF switch on the crash pad lower panel.

Sample scenario:
vehicle moving
the transmission lever position is in D-range. The brake pedal is released
the engine is running (vehicle moving)
the driver brakes until the vehicle comes to a standstill
the transmission lever position is in D-range. The brake pedal is pressed
the engine stops. The symbol “AUTO STOP” lights up in the instrument cluster
the driver wants to continue the journey
the transmission lever position is in D-range. The brake pedal is released
the engine is running again. The symbol goes out.

Operation Condition for the ISG Function
Will function if these conditions are met
- ISG OFF Switch is off
- switch (seat/door/hood) closed
- lever position in D or N range
- brake pedal pressed or released
- vehicle speed after driving higher than 8kmph (5mph)
- a/c system operating correctly
- engine coolant temperature over 78º C (172.4º F)
- brake pressure not below 35kpa
- battery SOC over 77% and temperature in the range of 2-55ºC (35.6-131ºF)
- Steering wheel – operating angle below 180º
- Parking condition – slope up hill <12%, down hill <8%
- no ISG related part errors

Won't function if:
- large steering angle when car is stopped
- low brake operating pressure
- turn on the a/c with max blower
- when battery condition is poor (low SOC)
- active defroster of front or rear glass
- unfasten driver's seat belt or open the door and hood
- on a steep slope
- with ISG system errors and other diagnosis
- ISG OFF switch is on
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#2 (permalink) Old 08-20-2011, 10:20 AM
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Default ISG from the 2012 Soul owner's manual

here's what the new owner's manual has to say about this feature:
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#3 (permalink) Old 08-11-2012, 11:22 AM
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My ISG OFF switch is allways on!! Someone told me that the proble should be related to the battery but today i went to a mechanic to check the battery status and it´s all ok.

Can anyone help me?
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#4 (permalink) Old 08-12-2012, 08:57 AM
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What models have this, certain years, do the American models have this?...I thought I read that Kia had discontinued this due to problems????
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#5 (permalink) Old 08-12-2012, 09:03 AM
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My car is the Ceed TX model of 2010 and it is european ( Portugal).
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#6 (permalink) Old 08-12-2012, 10:53 PM
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msblast - take it to your dealer

Norton1 is correct it was not available for the 2012 model year but will be a late availability for the 2013 model year for the 2.0L engine only.
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