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Auto Stop

Sergio Cunha

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Sergio Cunha New Member

Sergio Cunha

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Thank you for your post, i try almost everything and nothing, I turn off the ac and nothing, now I have an appointment Monday at the Chevy dealer to make sure everything is ok ....only have 950 miles 

OnTheReel Senior Enthusiast

OnTheReel

Posted
Posted

Enabling Criteria

 

The following vehicle conditions must be met for an Auto Stop event to take place.

 

  • Initial minimum vehicle speed during the drive cycle must reach 12 MPH (19 km/h). Subsequent minimum speed may vary from 1-6 MPH (2-10 km/h), depending on the vehicle.
  • In a vehicle with a manual transmission, the transmission must be in Neutral and the clutch pedal fully released.
  • Ambient and engine coolant temperature correlation must meet specified values.
  • Ambient and transmission fluid temperature correlation must meet specified values.
  • Hood switch status is closed.
  • Brake pedal is depressed beyond a specific value (approximately 27%).
  • Accelerator pedal is in the learned home position.
  • Brake booster vacuum is greater than 45 kPa (7 PSI).
  • Transmission gear selector is in the Drive position.
  • Vehicle speed is less than 3 MPH (5 km/h).
  • Engine speed is below 1500 RPM.
  • Engine coolant temperature is less than 248°F (120°C).
  • No A/C compressor request from the HVAC system (A/C or Defrost modes).
  • Battery voltage greater than 12 V.
  • Battery state of charge in the ECM is greater than 75% (changes with state of health).

 

The following conditions will enable an engine restart.

 

  • Transmission gear selector is moved from the Drive position.
  • In a vehicle with a manual transmission, the driver depresses the clutch pedal.
  • Driver removes pressure from the brake or depresses the accelerator pedal while the vehicle is in the Drive.
  • Brake booster vacuum is less than 40 kPa (6 PSI).
  • A/C compressor request from HVAC (A/C or Defrost modes).
  • Battery voltage less than 11 V.
  • Battery state of charge is less than 73% (changes with state of health).
  • Hood switch status changes to open.
  • Auto Stop time exceeds 2 minutes.
Cpl_Punishment Senior Enthusiast

Cpl_Punishment

Posted
Posted

Random question: has anyone experienced the truck auto stopping when you pull into say a parking stall then restarting when you shift to park only for you to turn it off? I don't own a T1 yet but I'm curious if that's something I'll run into if I'm slow shifting into park or something like that. 

econometrics Senior Enthusiast

econometrics

Posted
Posted
8 hours ago, Cpl_Punishment said:

Random question: has anyone experienced the truck auto stopping when you pull into say a parking stall then restarting when you shift to park only for you to turn it off? I don't own a T1 yet but I'm curious if that's something I'll run into if I'm slow shifting into park or something like that. 

That's never happened to me, but maybe that's just a coincidence. There's enough of a delay from coming to a full stop to the auto-stop kicking in, that I think most people would be putting the truck into P in enough time that the truck would notice it. 

 

This has been my experience, anyway. 

Cpl_Punishment Senior Enthusiast

Cpl_Punishment

Posted
Posted
1 hour ago, econometrics said:

That's never happened to me, but maybe that's just a coincidence. There's enough of a delay from coming to a full stop to the auto-stop kicking in, that I think most people would be putting the truck into P in enough time that the truck would notice it. 

 

This has been my experience, anyway. 

Thanks for the info. I was just curious, especially after reading above that it theoretically can kick in anywhere below 3 miles per hour. 

econometrics Senior Enthusiast

econometrics

Posted
Posted
4 minutes ago, Cpl_Punishment said:

Thanks for the info. I was just curious, especially after reading above that it theoretically can kick in anywhere below 3 miles per hour. 

That’s never come close to happening with me. It’s never engaged with me unless I’m stopped fully for at least a full 1-2 seconds, with my foot firmly pressing the brake. 

TBL569 Enthusiast

TBL569

Posted
Posted
17 hours ago, Cpl_Punishment said:

Random question: has anyone experienced the truck auto stopping when you pull into say a parking stall then restarting when you shift to park only for you to turn it off? I don't own a T1 yet but I'm curious if that's something I'll run into if I'm slow shifting into park or something like that. 

This happens with me all the time.  Because I'm at a lack of space in my garage to park, I have to park within a few inches from the wall.  I approach the wall slow and it shuts down when I stop only to fire up again when I put it in park.  It is so annoying that I've learned to shift into neutral before the truck comes to a complete stop so the engine doesn't die.  

 

I've also noticed that at some stops, if you lift off the brake just as the engine dies, there starter will crank before the engine full stops and causes that horrible starter screech sound.  Engineers should add a second to the stop and shut down delay!

 

I'm definitely not a fan as you can tell.

 

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