pncguy
Well-known member
This is the first I have heard about a problem with a 2015 braking system. Do we know if there was a build date after which it was fixed?
MartinChico said:Surprisingly, this problem occurred on a cool (~40-50 F), rainy day--apparently the conditions that this recall campaign was intended to address!
mwalsh said:MartinChico said:Surprisingly, this problem occurred on a cool (~40-50 F), rainy day--apparently the conditions that this recall campaign was intended to address!
Yeah. After spending more than half my life goofing with computers, I'm pretty firm in the belief that you can't fix a hardware deficiency with a software tweak.
Got the service campaign letter yesterday: " When then vehicle is parked in very cold temperature conditions, the relay inside the electronic brake booster may freeze. If this occurs, when the vehicle is first started, a brake warning lamp illuminates to immediately alert the operator. The brake system continues to function in a special "assist" mode, but may require noticeably more pedal effort." First I have heard of this mode. Wasn't sure where to post this as there are 2 other threads related to this topic : http://www.mynissanleaf.com/viewtopic.php?f=30&t=18283&start=20, and http://www.mynissanleaf.com/viewtopic.php?f=30&t=20770&start=10 . I haven't been to the dealer yet but I am sure it is the dreaded P5327 . I hate to fix something that works, and I don't exactly live in the coldest place in the planet. How many out there have had this done and your location, and any noticeable changes in the cars functions.XeonPony said:mwalsh said:MartinChico said:Surprisingly, this problem occurred on a cool (~40-50 F), rainy day--apparently the conditions that this recall campaign was intended to address!
Yeah. After spending more than half my life goofing with computers, I'm pretty firm in the belief that you can't fix a hardware deficiency with a software tweak.
Truer words hath not been spoken.
Soft ware is to limp to do any hard work, hence its name SOFT! My car shouted at me 2 days ago about this, I recall what I read here, and I am in no hurry to do it. Rather I'll look into geting a btter relay put in
ElectricEddy said:Got the service campaign letter yesterday: " When then vehicle is parked in very cold temperature conditions, the relay inside the electronic brake booster may freeze. If this occurs, when the vehicle is first started, a brake warning lamp illuminates to immediately alert the operator. The brake system continues to function in a special "assist" mode, but may require noticeably more pedal effort." First I have heard of this mode. Wasn't sure where to post this as there are 2 other threads related to this topic : http://www.mynissanleaf.com/viewtopic.php?f=30&t=18283&start=20, and http://www.mynissanleaf.com/viewtopic.php?f=30&t=20770&start=10 . I haven't been to the dealer yet but I am sure it is the dreaded P5327 . I hate to fix something that works, and I don't exactly live in the coldest place in the planet. How many out there have had this done and your location, and any noticeable changes in the cars functions.XeonPony said:mwalsh said:Yeah. After spending more than half my life goofing with computers, I'm pretty firm in the belief that you can't fix a hardware deficiency with a software tweak.
Truer words hath not been spoken.
Soft ware is to limp to do any hard work, hence its name SOFT! My car shouted at me 2 days ago about this, I recall what I read here, and I am in no hurry to do it. Rather I'll look into geting a btter relay put in
Levenkay said:What can software do about a frozen relay?
eddiebo924 said:Had my recall performed today. Had an 8:00AM appt and was out by 8:45. Our guys at Valley Nissan in Longmont, CO are awesome. So no way should it take an hour and a half or two hours.
I'll post back if any brake weirdness is going on.
BTW. . . It's a 2015 with about 19,500 miles. Yes, I drive the crap out of that thing and LOVE every single mile.
Makes sense, the Leaf knows the outside temperature, can't imagine it takes a lot of 12 volt power to cycle it occasionally.TomT said:About the only thing I can think of is that, below a certain temperature, they cycle it from time to time to keep it from freezing...
Levenkay said:What can software do about a frozen relay?
JRoque said:Hi all. As part of a regular check-up, the local dealer performed the P53270 recall. It consisted of flashing new firmware in. I found it odd that a problem where a relay freezes would be fixed with software. I bet it was cheaper than sealing the relay.
After the recall work was done, plus an additional software update, I noticed that the brakes don't grab as much as they used to, which is a positive. On the downside, "D" mode driving has more aggressive regen which I think is a mistake. I will always get better range by coasting than regening just to try to get the energy back out later. Better range and driving pleasure will come out of having zero regen on decel and should only be applied when the brake pedal is depressed. I know opinions vary on this.
JR
Levenkay said:What can software do about a frozen relay?
MSELeaf said:the brakes are less grabby at low speeds
Thanks for confirming, I wondered if it was just me or if the update would affect everyone the same way.MSELeaf said:The update took over 2 hours at my dealership in Silver Spring, MD. Not too happy about how long it took but the differences in regen are consistent with what others have said: the brakes are less grabby at low speeds and regen in D mode now allows for smoother coasting.
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