SparkevBlogspot
Posts: 499
Joined: Mon May 25, 2015 12:19 pm

Fake noise maker

Wed Feb 03, 2016 9:15 pm

This was in "Spark EV - An affordable electric racecar" and pulling it out here since it's not relevant to his topic.
WattEV wrote:Just disconnect the noise maker control unit. Super easy to get to. It is on the floor behind the center console next to the accelerator pedal. Where the driver side and passenger side carpets meet behind the center console, you can separate the two pieces easily as they are attached with just Velcro. Pull the Velcro apart and you will see the only control unit which is for the noise maker...It's small. Disconnect the connector and that's it.
When I tried this, warning icon popped up with "P" letter and check engine "idiot light" came on. I don't know what it means, so I reconnected it. Unfortunately, I forgot to take photos. However, I did measure sound; all are approximate. Noisemaker is only active when in R, D, L.

car off: outside = 32 dBA, inside = 31 dBa
car on, normal: outside = 44 dBA, inside = 36 dBA
car on, no noise maker: outside = 32 dBA, inside = 31 dBA. It's pretty much same as in P or N.

Without the noise maker, car is silent. You might think 4 dB is not a lot, but it is very noticeable in when stopped at traffic light. It sounds like "freight train" to exaggerate a bit.

If you plan to test, removing the connector involves pulling the white tab on top toward rear of the car. That allows pressing down on the black part, and you can slide out the connector. However, it could damage the car, so don't do it unless you can afford broken car.

Edit Apr. 3, 2016

Thanks to Zoomit, it was found that removing 7.5A fuse #23 (labeled PFAF) is the way to disable the fake nose maker.

http://www.mychevysparkev.com/forum/vie ... 6&start=23

Even without the noise maker, there's still slight humming sound from the pumps, though much less. It's probably as quiet as the car can get.

As for "safety", Toyota Prius is quieter than SparkEV even without the fake noise maker. As such, I don't see this "safety" feature as doing anything useful.
Last edited by SparkevBlogspot on Sun Apr 03, 2016 9:15 am, edited 1 time in total.

MrDRMorgan
Posts: 993
Joined: Wed Oct 30, 2013 7:27 am
Location: Manteca, California

Re: Fake noise maker

Thu Feb 04, 2016 8:18 am

SparkevBlogspot wrote:This was in "Spark EV - An affordable electric racecar" and pulling it out here since it's not relevant to his topic.
WattEV wrote:Just disconnect the noise maker control unit. Super easy to get to. It is on the floor behind the center console next to the accelerator pedal. Where the driver side and passenger side carpets meet behind the center console, you can separate the two pieces easily as they are attached with just Velcro. Pull the Velcro apart and you will see the only control unit which is for the noise maker...It's small. Disconnect the connector and that's it.
When I tried this, warning icon popped up with "P" letter and check engine "idiot light" came on. I don't know what it means, so I reconnected it. Unfortunately, I forgot to take photos. However, I did measure sound; all are approximate. Noisemaker is only active when in R, D, L.

car off: outside = 32 dBA, inside = 31 dBa
car on, normal: outside = 44 dBA, inside = 36 dBA
car on, no noise maker: outside = 32 dBA, inside = 31 dBA. It's pretty much same as in P or N.
Without the noise maker, car is silent. You might think 4 dB is not a lot, but it is very noticeable in when stopped at traffic light. It sounds like "freight train" to exaggerate a bit.

If you plan to test, removing the connector involves pulling the white tab on top toward rear of the car. That allows pressing down on the black part, and you can slide out the connector. However, it could damage the car, so don't do it unless you can afford broken car.
Because BEVs are so quiet, it is necessary to make some noise to alert pedestrians who might not hear the car and step in front of it. Is it wise to disconnect this feature?

Nashco
Posts: 537
Joined: Wed May 29, 2013 12:00 am
Location: Portland, OR

Re: Fake noise maker

Thu Feb 04, 2016 8:54 am

MrDRMorgan wrote:Because BEVs are so quiet, it is necessary to make some noise to alert pedestrians who might not hear the car and step in front of it. Is it wise to disconnect this feature?
My bicycle doesn't have a noise maker on it and I haven't run into anybody yet. I drove my Think City a lot in the city without a noisemaker and managed to avoid running over a pedestrian. Is it wise to rely on a noise maker to prevent running over people? It's the law to have a rear view obstacle detection/camera system on all vehicles under 10,000 pounds soon (2018), but for some reason GM doesn't let us have the same rear view camera that they designed into the Korean Spark EV and the gas Spark. I'm MUCH more worried about running over a thing/person that I can't see behind me than the ones I can see in front of me!

Bryce

NORTON
Posts: 1240
Joined: Fri May 01, 2015 5:52 am
Location: KC,MO

Re: Fake noise maker

Thu Feb 04, 2016 10:09 am

SparkevBlogspot wrote:... However, I did measure sound; all are approximate. Noisemaker is only active when in R, D, L.

car off: outside = 32 dBA, inside = 31 dBa
car on, normal: outside = 44 dBA, inside = 36 dBA
car on, no noise maker: outside = 32 dBA, inside = 31 dBA. It's pretty much same as in P or N.
...
Great job of technically measuring the sound !

Only,,, I'm never 'outside' the car when it's on.
So why does anybody care about this safety feature?
Used '14 2LT w/ DCFC. +71 K miles.
Mostly free charging! Only one LONG visit to the shop....
GM needs Modern Troubleshooting tools for Modern EV's.
3 step Trouble Tree, 2nd guess not covered by warranty and cost $800. 3rd guess fixed the problem.

SparkevBlogspot
Posts: 499
Joined: Mon May 25, 2015 12:19 pm

Re: Fake noise maker

Thu Feb 04, 2016 10:14 am

MrDRMorgan wrote:Because BEVs are so quiet, it is necessary to make some noise to alert pedestrians who might not hear the car and step in front of it. Is it wise to disconnect this feature?
Pedestrians should look before stepping into road. It may benefit the blind, but blind should rely on other sounds anyway (ie from lights). Fake noise may benefit them below 10 MPH, but when stopped, it makes virtually no difference. Even at below 10 MPH, it's up to EV driver, not pedestrians relying on fake noise.

My Prius is (was :-( ) lot quieter than SparkEV. When stopped, Prius makes no noise. Leaf is dead quiet. By comparison, SparkEV sounds like a jet engine (yes, exaggerate a bit) when stopped in R, D, L.

Norton, it's supposedly so that pedestrians can hear EV, presumably so they don't bump into it. Seeing how even 10 MPH makes more noise than fake noisemaker, this "safety" feature is useless.

By the way, I live in the woods, so it's very quiet, though not at anechoic chamber quality. If one measures elsewhere, absolute values will be different, though relative values would be similar.

Nashco
Posts: 537
Joined: Wed May 29, 2013 12:00 am
Location: Portland, OR

Re: Fake noise maker

Thu Feb 04, 2016 12:29 pm

NORTON wrote:So why does anybody care about this safety feature?
The noise maker drives me nuts. When I'm staged for a race and trying to get in the zone, it's nearly silent. The stage ahead is clear. Helmet on, belt tight, waiting for the green flag, and focused 100% on the road ahead. The flagger next to my car can here a WOOSH and I can hear a WOOSH, even though I'm just sitting there...but aren't electric cars supposed to be silent? Why can't I turn this dang thing off? Well, I can...by shifting it to neutral. Make that 98% focused on the road ahead, and 2% on that stupid noise maker that isn't helping anybody on this closed course...

Bryce

elpwr
Posts: 66
Joined: Wed Jun 03, 2015 4:11 am

Re: Fake noise maker

Thu Feb 04, 2016 2:05 pm

Where is the actual noisemaker unit itself? Seems like it's toward the lower left front of the car. Maybe it could be muffled instead of disconnecting the controller.

SparkevBlogspot
Posts: 499
Joined: Mon May 25, 2015 12:19 pm

Re: Fake noise maker

Thu Feb 04, 2016 2:34 pm

Nashco wrote:The noise maker drives me nuts. When I'm staged for a race and ...
Sorry. Should I have kept it in your thread? It's too late now, but maybe you can add the result to your thread, such as how to disable it.

MrDRMorgan
Posts: 993
Joined: Wed Oct 30, 2013 7:27 am
Location: Manteca, California

Re: Fake noise maker

Thu Feb 04, 2016 5:14 pm

Nashco wrote:
MrDRMorgan wrote:Because BEVs are so quiet, it is necessary to make some noise to alert pedestrians who might not hear the car and step in front of it. Is it wise to disconnect this feature?
My bicycle doesn't have a noise maker on it and I haven't run into anybody yet. I drove my Think City a lot in the city without a noisemaker and managed to avoid running over a pedestrian. Is it wise to rely on a noise maker to prevent running over people? It's the law to have a rear view obstacle detection/camera system on all vehicles under 10,000 pounds soon (2018), but for some reason GM doesn't let us have the same rear view camera that they designed into the Korean Spark EV and the gas Spark. I'm MUCH more worried about running over a thing/person that I can't see behind me than the ones I can see in front of me!

Bryce
There must be some reason they put the noise maker into the car or is it just there to annoy the driver? I do agree it would be great to have the rear looking camera.

Nashco
Posts: 537
Joined: Wed May 29, 2013 12:00 am
Location: Portland, OR

Re: Fake noise maker

Thu Feb 04, 2016 6:31 pm

MrDRMorgan wrote: There must be some reason they put the noise maker into the car or is it just there to annoy the driver? I do agree it would be great to have the rear looking camera.
Sure, there is a reason it's there for some use cases...but why can't I turn it off when it doesn't make sense? I have the same problem with the rear air bags. I have removed my rear seats, why can't I disable the rear air bags for a non-existent passenger, but I CAN disable the front passenger one where somebody can still sit? Why can't I disable the automatic locks? Why can't I disable the tire pressure monitors when I bolt wheels to the car without sensors? Those are all great to have SOME of the time, but if it doesn't help me other times I should have the power to change that system IMO.
SparkevBlogspot wrote:
Nashco wrote:The noise maker drives me nuts. When I'm staged for a race and ...
Sorry. Should I have kept it in your thread? It's too late now, but maybe you can add the result to your thread, such as how to disable it.
Nope, this topic should have its own thread. I've never bothered to tinker with it, but it does drive me crazy.

Bryce

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