The reason I ask is because the device apparently just flickers the “hood open” signal *once* for the drive cycle. So you go run a bunch of errands and it’s flickered 5 times, let’s say. What exactly is the computer recording? Is it recording 5 instances, or does it only record one, repeatedly over-writing it?
I can believe the computer is logging all *failures* (that’s essentially DTCs), but not all *inputs*. If it logged all inputs, it would likely include *history*, and then we wouldn’t hear the familiar dealership refrain, “I brought it to the dealer and since there was no CEL (or the problem didn’t happen for them), they couldn’t fix it”. Instead, we would hear, “the dealer uploaded my data and was able to replay (and pinpoint) the problem in just a few minutes”.
So *possibly* you have a single “hood-open” event logged somewhere on the computer that doesn’t set the CEL, and can only be seen by a dealership diagnostic machine (and not by a common OBD-2 reader, apparently).
What’s the dealer going to do with this information - suggest you change the hood latch (or its sensor)?
To the SmartStopStart vendor:
1.) If a split second interruption of the hood latch signal is enough to make the computer disable the STOP/START functionality for an entire drive cycle, the logic must be latching that event. Why then doesn’t the driver get notification that his hood is open?
2.) What if a manufacturer *does* decide to update their software, affecting operation of your device (which they could easily do)? Does your warranty include updates to get it working again?
To answer your questions:
1) The SmartStopStart module takes advantage of a programmed feature in the Equinox to protect a mechanic working on the engine. When the hood is opened at any time during the drive cycle, even very briefly, auto stop is disabled in order to prevent a potential sudden restart startling or possibly even injuring a mechanic working on the car. So yes, the state is latched by the ECM. The display module might every once in a while 'catch' the very brief virtual hood opening, and display 'hood open' for a second when when the car first starts, but 99+% of the time the display computer is not fast enough to catch it.
2) Yes, theoretically the software can be changed by the manufacturer. We offer a 90 day money back guarantee on the module and a 3-year repair or replace warranty. In the event the manufacturer changed the software we would make every effort to update our product so it would still work and offer a replacement under our warranty. I believe, however this scenario is HIGHLY unlikely since this is programmed in the vehicle as a safety feature. We have been producing Stop-Start override devices since 2016 and this has never happened. Though they never would admit it, our product is actually helping sales, because some people refuse to buy vehicle with auto stop that cannot be overridden. I have received much correspondence that proves this point.
As far as recording of auto stop override events goes, yes, during a drive cycle
, if the GM diagnostic equipment is connected, information is available as to the reason an auto stop event is suppressed. If our module was connected, the hood open event would be seen. This is why I suggest removing the module when going for dealer service, just to play it as safe as possible regarding the warranty. To my knowledge though, this data is not stored beyond the individual drive cycle. It is FAULTS that are stored semi-permanently. If someone were to disable auto stop by disconnecting the hood switch that would generate a fault code that would be stored and provide a record.