Clunk from rear when ISG restarts

[Thomby]

Since I also always use auto hold, the EPB engages automatically

I couldn't remember if it was Park, parking brake, or both that engaged automatically...are you saying the latter will only auto engage if you have brake hold on?

 

[D.J.]

I couldn't remember if it was Park, parking brake, or both that engaged automatically...are you saying the latter will only auto engage if you have brake hold on?

I believe that is correct.

I believe the parking brake (EPB) automatically engages, only if you had auto hold enabled during that drive cycle. Otherwise the parking brake does not automatically enable itself.

 

[D.J.]

I couldn't remember if it was Park, parking brake, or both that engaged automatically...are you saying the latter will only auto engage if you have brake hold on?

EPB is automatically applied, if the AUTO HOLD feature was used, as soon as the ignition is switched off.

It is my "modus operandi" or SOP, standard operating procedure.

 

[95oRANGEcRUSH]

My car did something like what you are describing, about 4 or 5 years ago.

Only 1nce per drive cycle (cold mornings), it would not happen more than once per cold drive cycle.. (once on the way to work, and then once again on the way home from work).

My symptoms were, on the first restart from the first ISG event, there would be what felt like an impact, as if I was gently rear-ended by a car from behind.

Very shortly after experiencing this a few times, I disabled ISG for all future drives, and I never debugged the situation, but surely it's related to the engine starting while in gear, and the torque converter spinning up


Same here!
Very low concern.

Also:
Automate pressing both "Auto Hold" - "Auto Stop and go" each drive cycle. 2018 Kia Stinger

https://imgur.com/a/RltYt8v

Nice method. I leave my auto hold on 24/7 so don’t need to fiddle with it. For ISG, I chose to disable it the resistor method way. Pretty sure it’s been over 2 years now and no issues with it. Whatever the method, ISG has to be disabled, I can’t stand it!

 

[D.J.]

EPB is automatically applied, if the AUTO HOLD feature was used, as soon as the ignition is switched off.

It is my "modus operandi" or SOP, standard operating procedure.

View attachment 89158

Pressing the engine stop button, while in reverse, with auto hold enabled.

Life of luxury:

• Power seat retracts
• Power steering lifts
• Transmission goes into Park
• Parking brake gets set
• All that's missing is a happy ending

Watch Power off, from reverse. | Streamable

Watch "Power off, from reverse." on Streamable.

streamable.com

 

[Thomby]

Automate pressing both "Auto Hold" - "Auto Stop and go" each drive cycle

Do you know if the resistor short trick would work on the Auto Hold button like it does for ISG? IE the equivalent of having the button permanently pressed

 

[D.J.]

Do you know if the resistor short trick would work on the Auto Hold button like it does for ISG? IE the equivalent of having the button permanently pressed

I believe so, but I haven't tried that.

I'm fairly certain it will work fine. I preferred my method because my method leaves both options completely available, it just changes their default behavior.

 

[Thomby]

I believe so, but I haven't tried that.

I'm fairly certain it will work fine. I preferred my method because my method leaves both options completely available, it just changes their default behavior.

Ok thanks, do you happen to know which pins on the harness plug? I'm guessing I could trace back from the switch but I haven't been under the console since I did the ISG resistor and don't remember how consolidated things are.

 

[D.J.]

Ok thanks, do you happen to know which pins on the harness plug? I'm guessing I could trace back from the switch but I haven't been under the console since I did the ISG resistor and don't remember how consolidated things are.

If you click on the Imgur link in post #19, there are a bunch of pics...

Pin#4 (brown) of the auto hold connector gets a +12v signal when the button is pressed.

 

[Thomby]

If you click on the Imgur link in post #19, there are a bunch of pics...
Pin#4 (brown) of the auto hold connector gets a +12v signal when the button is pressed.

Thank you, I didn't realize there was an album behind the imbedded video. So I believe the 32-28 wires were for ISG...not sure if 32 is a ground since it's black.

If #4 on the other harness is looking for +12v, is the red #17 a switched 12v source? (I can poke it with a multimeter to confirm, but won't bother if it's constant hot since even through a high resistance I wouldn't want the parasitic drain).

 

[D.J.]

Thank you, I didn't realize there was an album behind the imbedded video. So I believe the 32-28 wires were for ISG...not sure if 32 is a ground since it's black.

If #4 on the other harness is looking for +12v, is the red #17 a switched 12v source? (I can poke it with a multimeter to confirm, but won't bother if it's constant hot since even through a high resistance I wouldn't want the parasitic drain).

It's been awhile, but I am 99% certain that #17, red, is switched with ignition.

99.5% certainty.

 

[Thomby]

It's been awhile, but I am 99% certain that #17, red, is switched with ignition.

That's good enough to justify the 10 minutes it'll take to confirm. I've literally never used it because my list of things to do upon startup was getting too long (Lane Keep Assist, Smart Mode, and ISG Off until the resistor trick).

 

[rtv900]

That's good enough to justify the 10 minutes it'll take to confirm. I've literally never used it because my list of things to do upon startup was getting too long (Lane Keep Assist, Smart Mode, and ISG Off until the resistor trick).

the lane keep assist on mine stays off permanently once turned off once
the only button I have to push is the auto start stop

 

[Thomby]

the lane keep assist on mine stays off permanently once turned off once
the only button I have to push is the auto start stop

My LKA has to be enabled at each startup, and I probably use it more than any other feature. I thought the radar cruise control that paces the car in front would be the convenience feature I enjoyed most, but I find myself using lane keep 10x as much, just cruising on country roads.

 

[D.J.]

the lane keep assist on mine stays off permanently once turned off once
the only button I have to push is the auto start stop

Must be different for different years.

My 2018 also holds this setting (lane keep), I can switch it on or off, and it stays where I leave it permanently.

 

[D.J.]

My LKA has to be enabled at each startup, and I probably use it more than any other feature. I thought the radar cruise control that paces the car in front would be the convenience feature I enjoyed most, but I find myself using lane keep 10x as much, just cruising on country roads.

Must be difference between model years.
My 2018 saves this setting between drive cycles.

 

[Thomby]

the lane keep assist on mine stays off permanently once turned off once

My 2018 also holds this setting (lane keep)

I think I figured it out. I was talking about active lane management, not the one that only intervenes when you start to leave the lane.

The button on the right side of the wheel, whose icon is a steering wheel, actively steers to keep you centered in the lane. Apparently this is called Lane Follow Assist, and has to be turned on each time you drive (at least in my 2022). Mine works at any speed down to a crawl.

The button on the dash left of the steering wheel, with a car icon in between two lanes (can also be activated by holding the wheel button down), is Lake Keep Assist, which provides corrective steering if you start to leave your lane (above ~40mph) but otherwise let you ping-pong back and forth. That one's setting does not reset between drives in my 2022.

Apparently models through 2020/2021 had "Lane Keep Assist" (corrections only) and "Active Lane Keep Assist" (steers the car, what's now called Lane Follow Assist), and the button with the car between lanes handled both. The steering wheel icon was added to distinguish LFA from LKA.

 

[rtv900]

mine has no icons like that on the left side
the right side just has the wheel in between two lines. Pressing it turns on green dash icon of a wheel, and it adjusts the wheel position when driving between white lines if you drift.
The one next to that, also right side, is a car with 3 lines behind it that adjusts the distance setting for adaptive cruise control. ( I wish this one could be turned off all together but it can't asaik)

I don't really understand what difference you are describing between lane follow and lane keep. Sounds like the same feature to me

 

[Thomby]

mine has no icons like that on the left side
the right side just has the wheel in between two lines. Pressing it turns on green dash icon of a wheel, and it adjusts the wheel position when driving between white lines if you drift.

The dash to the left of my steering wheel where you pop the gas door and adjust the dash brightness has my Lane Keep Assist button (2nd from left below), which I've never really used.



The right side of my steering wheel has my Lane Follow Assist button which I use constantly (and I recently discovered if you hold it, LKA will activate separately, although it's redundant if LFA is on). Bottom left button below.

I don't really understand what difference you are describing between lane follow and lane keep. Sounds like the same feature to me

- Lane Departure warning just beeps at you when you're about to cross the lane line.
- Lane Keep Assist (car between two lines) will only intervene when you're about to cross the lane line with brief corrective steering.
- Lane Follow Assist, formerly Active-LKA (steering wheel between two lines) will continuously steer the car to keep it within the lane.

LKA is the older system and only active above about 35-40mph. If you take your hands off the wheel you'll just blindly barrel ahead until the car has to yank you away from crossing the line, so it's really just a corrective feature and not even partial self-driving.

Kia has changed the functionality and names over the years, so it may be that for your year everything was called "Lane Keep Assist", and for the lower trims it just did momentary correction (what LKA does now) while the upper trims got Active LKA that continuously steer (what LFA does now).

No idea why you can't disable the Adaptive Cruise...are you sure hitting the normal Cruise Control button (speedometer "Mode" icon directly above it) won't cycle between normal cruise, smart cruise, and cruise totally off? That's how it works on mine: the car icon just rotates through the 4 follow distances, while the speedo icon turns it on or off.

 

[rtv900]

I'm going to have to check mine again. For one your buttons on the left dash side are different than mine. My gas door is on the right side and I do not have that little scroll knob. No clue what that even does. But now you've jogged my memory and I do think I have the car between the two lines. I guess I didn't even realize that was a different feature than the steering wheel between the lines. I just turned them both off pretty early on.

I also need to verify again about the cruise button. That is definitely what I use to start cruise control, but I'm 99% sure it's either on or off. If I'm driving with it on and push it again it just turns off, it doesn't have a "normal cruise" mode. My normal daily is pushing it once at a certain spot on a highway and it's adaptive right out of the gate. Push it again and it's off. That's basically it.

Still planning on messing with them on my ride home tonight.