Hill start assist questions...
#1
Instructor
Thread Starter
Hill start assist questions...
The Hill Start Assist on my 2015 C7 M7 stopped working several weeks ago. I made an appointment with the dealer next week and they asked me if my car was equipped with it. Based on their question I could use some help with the following questions.
1) It is not in my build order and the manual implies that not all C7s have it so how would I prove to dealer that my car has it and it is not working?
2) Since mine does not work anymore I do not remember if there is any display when it is engaged. Is there?
Thanks for any help...
1) It is not in my build order and the manual implies that not all C7s have it so how would I prove to dealer that my car has it and it is not working?
2) Since mine does not work anymore I do not remember if there is any display when it is engaged. Is there?
Thanks for any help...
#2
1) It's standard on all M7s. The clutch pedal isn't on your build sheet either.
2) There is no display for engagement.
3) Find a dealer who is educated.
Are you sure it's really not working? I don't notice it all the time, but every time I'm on a steep grade, I do. I always wait at stop lights in neutral with the clutch pedal released. When I depress the clutch pedal, and release the brake, it's always there on any kind of noticeable uphill grade.
2) There is no display for engagement.
3) Find a dealer who is educated.
Are you sure it's really not working? I don't notice it all the time, but every time I'm on a steep grade, I do. I always wait at stop lights in neutral with the clutch pedal released. When I depress the clutch pedal, and release the brake, it's always there on any kind of noticeable uphill grade.
The following 2 users liked this post by Foosh:
dvilin (04-17-2019),
Neil Baker (07-23-2017)
#4
The Hill Start Assist on my 2015 C7 M7 stopped working several weeks ago. I made an appointment with the dealer next week and they asked me if my car was equipped with it. Based on their question I could use some help with the following questions.
1) It is not in my build order and the manual implies that not all C7s have it so how would I prove to dealer that my car has it and it is not working?
2) Since mine does not work anymore I do not remember if there is any display when it is engaged. Is there?
Thanks for any help...
1) It is not in my build order and the manual implies that not all C7s have it so how would I prove to dealer that my car has it and it is not working?
2) Since mine does not work anymore I do not remember if there is any display when it is engaged. Is there?
Thanks for any help...
#5
Le Mans Master
Does your e-brake work?
#6
Instructor
Thread Starter
Thanks as I called on a Saturday to make my appointment when there are no or limited Corvette techs.
So it seems that all C7 Manuals from '14 to present have it but not automatics and there is no display to indicated when it is engaged.
Anyone have any idea why there is no indicator when it is engaged as it would seem to be pretty useful based on reading many of the Hill Assist threads...
So it seems that all C7 Manuals from '14 to present have it but not automatics and there is no display to indicated when it is engaged.
Anyone have any idea why there is no indicator when it is engaged as it would seem to be pretty useful based on reading many of the Hill Assist threads...
#7
Instructor
Thread Starter
No issues at all with my e-brake. Hill assist does not work on steep inclines but I can set the e-brake and it releases when I start to go with no issue.
#8
The Hill Start Assist on my 2015 C7 M7 stopped working several weeks ago. I made an appointment with the dealer next week and they asked me if my car was equipped with it. Based on their question I could use some help with the following questions.
1) It is not in my build order and the manual implies that not all C7s have it so how would I prove to dealer that my car has it and it is not working?
2) Since mine does not work anymore I do not remember if there is any display when it is engaged. Is there?
Thanks for any help...
1) It is not in my build order and the manual implies that not all C7s have it so how would I prove to dealer that my car has it and it is not working?
2) Since mine does not work anymore I do not remember if there is any display when it is engaged. Is there?
Thanks for any help...
I don't have my manual in front of me, but the way mine seems to work is that hill assist is not engaged until you have selected first gear (or reverse) and applied (and released) the foot brake.
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Neil Baker (07-23-2017)
#9
You don't need an indicator for it, and you should be focused on the road, not head down. All you should be caring about is not rolling back.
Quite frankly, a competent manual driver doesn't need it at all. The only reason I know it's there is that I've tested it a few times by purposely not starting right away. I also feel a slight amount of resistance occasionally when starting on a hill, which is HA initially holding, then releasing.
I'm pretty sure it doesn't engage at all on flat or downhill grades.
Quite frankly, a competent manual driver doesn't need it at all. The only reason I know it's there is that I've tested it a few times by purposely not starting right away. I also feel a slight amount of resistance occasionally when starting on a hill, which is HA initially holding, then releasing.
I'm pretty sure it doesn't engage at all on flat or downhill grades.
#10
Instructor
Thread Starter
You wouldn't have to "guess" if there was an indicator and there is no reason the indicator could not be in the heads up display if you are worried about looking "down".
#11
Tech Contributor
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The way to check HSA is to pull to a stop on a steep hill. Hold the brake and put the car in 1st gear, keep the clutch in and then release the brake. The car should not roll backwards for a few seconds. After a few seconds the HSA will release and the car will roll backwards.
The biggest problem I have had with HSA is sometimes it holds more than it needs to and if I am not paying attention I will stall the car because the brake holds to well. Mine activates even on slight grades. I am pretty sure HSA is a function of the ABS and base brake system Vs an eBrake function. When you are on a hill, with the brake pedal pushed and the car stopped the brake control module detects that condition and applies brake pressure to the rear brake calipers. Just like traction control does.
Bill
The biggest problem I have had with HSA is sometimes it holds more than it needs to and if I am not paying attention I will stall the car because the brake holds to well. Mine activates even on slight grades. I am pretty sure HSA is a function of the ABS and base brake system Vs an eBrake function. When you are on a hill, with the brake pedal pushed and the car stopped the brake control module detects that condition and applies brake pressure to the rear brake calipers. Just like traction control does.
Bill
#12
#14
The way to check HSA is to pull to a stop on a steep hill. Hold the brake and put the car in 1st gear, keep the clutch in and then release the brake. The car should not roll backwards for a few seconds. After a few seconds the HSA will release and the car will roll backwards.
The biggest problem I have had with HSA is sometimes it holds more than it needs to and if I am not paying attention I will stall the car because the brake holds to well. Mine activates even on slight grades. I am pretty sure HSA is a function of the ABS and base brake system Vs an eBrake function. When you are on a hill, with the brake pedal pushed and the car stopped the brake control module detects that condition and applies brake pressure to the rear brake calipers. Just like traction control does.
Bill
The biggest problem I have had with HSA is sometimes it holds more than it needs to and if I am not paying attention I will stall the car because the brake holds to well. Mine activates even on slight grades. I am pretty sure HSA is a function of the ABS and base brake system Vs an eBrake function. When you are on a hill, with the brake pedal pushed and the car stopped the brake control module detects that condition and applies brake pressure to the rear brake calipers. Just like traction control does.
Bill
Does your eBrake release when starting normally?. Mine does, but others have reported their's do not. Similarly, I've never come close to stalling the car as a result of HA. I only feel the slightest amount of resistance before it releases. I've always assumed HA was an eBrake based system.
The point here is that it sounds like some eBrakes are harder to release than others. I wonder if there is some sort of adjustment.
Last edited by Foosh; 07-23-2017 at 02:40 PM.
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$$$frumnuttin' (07-24-2017)
#15
Safety Car
My daily commute has 3 very steep hills with either a stop sign or a stop light that will force me to stop on a steep hill. 2 of the 3 literally requited me to pull the ebrake up and coordinate releasing it with my clutch release and throttle position. Not all that hard, but darned inconvenient particularly when I was working and might need to be on a call or still having that morning cup of coffee. Drove me crazy in my C6Z06 which is why I bought the A8 this time. No longer have a problem.
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Spasetrucker (07-24-2017)
#16
You don't need to do that on any version of the C7 M7 because of the standard Hill Assist feature, which is the subject of this thread. It holds the car automatically when starting on a steep hill.
Last edited by Foosh; 07-23-2017 at 03:03 PM.
#17
Safety Car
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True, but the fact is, whether you want one or not, there is no indicator. You started out with a practical question. Now you're being theoretical. That's not going to help solve your problem.
#18
The way to check HSA is to pull to a stop on a steep hill. Hold the brake and put the car in 1st gear, keep the clutch in and then release the brake. The car should not roll backwards for a few seconds. After a few seconds the HSA will release and the car will roll backwards.
The biggest problem I have had with HSA is sometimes it holds more than it needs to and if I am not paying attention I will stall the car because the brake holds to well. Mine activates even on slight grades. I am pretty sure HSA is a function of the ABS and base brake system Vs an eBrake function. When you are on a hill, with the brake pedal pushed and the car stopped the brake control module detects that condition and applies brake pressure to the rear brake calipers. Just like traction control does.
Bill
The biggest problem I have had with HSA is sometimes it holds more than it needs to and if I am not paying attention I will stall the car because the brake holds to well. Mine activates even on slight grades. I am pretty sure HSA is a function of the ABS and base brake system Vs an eBrake function. When you are on a hill, with the brake pedal pushed and the car stopped the brake control module detects that condition and applies brake pressure to the rear brake calipers. Just like traction control does.
Bill
#19
Fumbling,
As I said in post #14, my car does not do that, and I've never stalled it. It sounds like there is variability among cars. HA releases easily with normal pedal effort.
Similarly, I don't have to manually release the eBrake either, because it disengages automatically when I release the clutch and give it just a normal amount of throttle.
As I said in post #14, my car does not do that, and I've never stalled it. It sounds like there is variability among cars. HA releases easily with normal pedal effort.
Similarly, I don't have to manually release the eBrake either, because it disengages automatically when I release the clutch and give it just a normal amount of throttle.
Last edited by Foosh; 07-23-2017 at 04:08 PM.
#20
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Fumbling,
As I said in post #14, my car does not do that, and I've never stalled it. It sounds like there is variability among cars. HA releases easily with normal pedal effort.
Similarly, I don't have to manually release the eBrake either, because it disengages automatically when I release the clutch and give it just a normal amount of throttle.
As I said in post #14, my car does not do that, and I've never stalled it. It sounds like there is variability among cars. HA releases easily with normal pedal effort.
Similarly, I don't have to manually release the eBrake either, because it disengages automatically when I release the clutch and give it just a normal amount of throttle.
Bill