Idle Stop and Go (ISG) Malfunction

[zstabe]

Bought a new GT1 in December, and have noticed the amber ISG icon illuminating quite often when at stop lights. Car Manual states it may be a malfunction or sensor issue. Have an appointment to get it looked at next week. Has anyone had a similar issue?

 

[lucif3r]

Im not sure if I understood you correctly, but what you describe is normal and not a malfunction. The orange light on the dash at stops mean that you have not deactivated it and if the conditions are met, it will engage.

 

[nhcowboy28]

This may sound stupid, but how far you press the break pedal (in addition to other factors) will control whether IS&G shuts the car off. Amber (in the icon in the tach) simply warns conditions not met.

 

[nhcowboy28]

This may sound stupid, but how far you press the break pedal (in addition to other factors) will control whether IS&G shuts the car off. Amber (in the icon in the tach) simply warns conditions not met.

And let me clarify... if you take your foot off the brake pedal, the amber should go off and NOT stay illuminated.

So if you have a constant amber or red icon in the tach, then I’d take it in to be looked at.

 

[NS_Stinger]

Not a malfunction, the icon on your dash is simply telling you that you haven't met the criteria for IS&G to activate, it can be a number or reasons causing it, too much electrical load, A/C is on, foot not firmly enough on brake, car not fully warmed up yet etc. etc. etc.

 

[SteveCo]

Check out other threads on there about ISG, as well as your owner's manual. As @nhcowboy28 stated, the amber indicator is a normal condition when ISG is enabled and the car is stopped - it simply means that the car hasn't met a number of conditions that are required for the ISG to work.

These include engine coolant temperature, battery temperature, HVAC settings, etc. The biggest factor I've found is battery charge level - numerous short trips around town can easily lower the battery voltage to a point where it doesn't pose any risk to normal operation of the vehicle, but is below the threshold required for ISG to function.

 

[zstabe]

Thank you all for the feedback. With all other conditions being met, I'm wondering if it's the battery charge that's causing it. However, I've reviewed the manual again and it only references the yellow indicator light under the "ISG system malfunction" section.

 

[nhcowboy28]

Thank you all for the feedback. With all other conditions being met, I'm wondering if it's the battery charge that's causing it. However, I've reviewed the manual again and it only references the yellow indicator light under the "ISG (Idle Stop and Go) system malfunction" section.

Again, is the light on all the time or only when stopped pressing the brake?

 

[zstabe]

Only when pressing the brake.

 

[SteveCo]

Thank you all for the feedback. With all other conditions being met, I'm wondering if it's the battery charge that's causing it. However, I've reviewed the manual again and it only references the yellow indicator light under the "ISG (Idle Stop and Go) system malfunction" section.

I just checked the owner's manual, and you are correct - it does a poor job covering the amber ISG warning appearing when the system is enabled but the actuating conditions aren't met.

If you suspect battery charge may be the issue, put the battery on a low amperage charge overnight. It's a big battery, so expect it to take several hours - let it charge up until the charger shows it's fully charged up.

When I did this after my ISG stopped working and showed the yellow light, that renabled it for another couple of weeks until it had again discharged the battery below the threshold.

 

[nhcowboy28]

Only when pressing the brake.

Then nothing is wrong other than possibly your battery being low (get it tested). And as I stated... try pushing the brake pedal down more at a stop. I can control if I don’t want IS&G ENGAGING by lightly pressing only.

 

[zstabe]

@nhcowboy28 I'll give that a try today after work. I'm curious to see if it helps. @SteveCo I have an appointment at the dealer Tuesday and will have them test the battery as a precaution.

Thank you again.

 

[ScottE]

There's a 99% chance everything is fine. Just go for a long drive (where car is running at a constant speed) and it will start working again. If you do mostly around town stop-and-go traffic it'll stop working after a week or two.

 

[MrSmoofy]

Since we are asking questions here about this not trying to jack a thread. Using the Break Hold and the ISG I feel it turns off the engine to quickly and should wait longer. An example would be in stop and go traffic where we are moving a few feet every 30 to 60 seconds seems like it should wait longer. Another example which I find very annoying is I pull into a parking spot the car turns off, I put it in park, the car turns on for me to then turn it off. Is this just how it works or am I missing something?

 

[Soca Boy]

Since we are asking questions here about this not trying to jack a thread. Using the Break Hold and the ISG (Idle Stop and Go) I feel it turns off the engine to quickly and should wait longer. An example would be in stop and go traffic where we are moving a few feet every 30 to 60 seconds seems like it should wait longer. Another example which I find very annoying is I pull into a parking spot the car turns off, I put it in park, the car turns on for me to then turn it off. Is this just how it works or am I missing something?

It comes down to how much your pressing in on the brake paddle. Once you come to a stop ease off the brake a bit and it won’t activate the ISG, my fix to the ISG is to turn it off right after I start the car.

 

[TwiceStung]

Agree with others who have said this is perfectly normal. I always run with the heat/AC on Auto Sync mode, which means it blows on defrost with the AC on a lot this time of year. This puts strain on the battery, which means the ISG will not activate (shut off the car) but keep it running. I’ve tested this and it correlates exactly. Hope this makes sense. Been a long week.

 

[Juggaweirdo]

Mine just blinks amber and has not once worked. It will only stop blinking if I shut car off and the cruise has not worked since I bought it. Turns on but won't set

 

[MerlintheMad]

^^^ISG being finicky is not a feature to get checked out, in my humble opinion (after starting, disabling that is the first thing I do). Cruise control, however, should always work. That issue I would have looked into.

 

[44pirate]

I bought my stinger used. ISG yellow flashing after a few minutes of driving and no Cruise control, come to find previous owner had brake snip switch installed. It was on the ECU under the Hood. Look for a switch or splicing in that area.

 

[Juggaweirdo]

Ok I will definitely do that. It is much appreciated. It's going in the shop Monday and they made a deal with me that if they can't fix it I can order a brand new 2022 Stinger GT from the factory. I have mixed feelings about it because of mine being 1 of 800 of the GTS model but it's not a deal I'd turn down