Just scheduled my 2017 RX for the 25K service, and the Service Manager said that a new limited service campaign requires looking at the Enform GPS module serial number (I think it is a Verizon product), and replacing the module if necessary. Apparently if it needs to be replaced. it can take up to 2 1/2 hours. He arranged for a loaner. Sorry, I don't have any other information. My understanding is that this is a brand new campaign that effects many models, and cars.

 

interesting, if you find more please share. thanks
would be nice to know if the serial number is displayed in the software, or a sticker on a module. (call in vs inspection)

found one, looks like a reprogram, ??

 

from my drivers.lexus.com

SERVICE CAMPAIGN

Title

LIMITED SERVICE CAMPAIGN KLG (Remedy Notice) - Multiple Models and Model Years - Safety Connect System - Vehicle Location Inaccurate

Status

Remedy Available

Description

The Data Communication Module (DCM) in the subject vehicles are equipped with software to identify the location of the vehicle using the Global Positioning System (GPS) to support features of the Safety Connect system. Due to incorrect programming in the DCM software, after November 2nd, 2019, the GPS coordinates for this system will be calculated incorrectly. This will cause the system to use incorrect vehicle coordinates if one of the system €™s features is activated.

Remedy

For all involved vehicles, any authorized Lexus dealer will reprogram the Data Communication Module at NO CHARGE to the vehicle owner.

Campaign Date

September 12, 2019

Campaign Expiration Date

December 01, 2022

 

I got the impression from the service manager that they had to physically look at the module and record the serial number. This would take about half an hour. If the module needed replacement, it would take about 2 1/2 hours.

 

Someone on the Prius Chat forum who seems to have detailed information from the Toyota techinfo website reported that the Safety Connect software update, if necessary, takes 75 to 85 minutes. He didn't mentioned replacement of hardware - only reprogramming. According to him, the problem affects only five Toyota brand models. He didn't mention which Lexus models were affected - only that there is a similar service campaign. It might be a coincidence but none of the affected Toyota models were built in North America. Our Japan built 2012 Prius v is on the list but our U.S. built 2014 Sienna is not.

I wonder if there will be a way for an owner to verify that the software update has been successful. Maybe we can call the Safety Connect response center via the SOS button after November 2nd and ask if they can tell where we are. When I told my wife about the problem today, she joked that we need to get it fixed so that her body can be found! My sick sense of humor has apparently rubbed off on her.

We value Safety Connect for it working in rural areas where we have no cell phone service, e.g. we have zero cell phone service in and around the little town where I spent my childhood but Safety Connect works fine.

 

If you ask Enform remote where it is, wouldn't that likely be triggering the same software? Mine is accurate.

 

"Due to incorrect programming in the DCM software, after November 2nd, 2019..."

Unless your living in the future, I don't think you can verify this, yet.

 

Per the 3rd post in this thread, the Safety Connect location inaccuracy doesn't start until 11/2/2019. That date is 30 weeks after the last GPS week number rollover which was on 4/4/2019. The previous time a similar rollover caused a problem like this was after the GPS week number rollover occurred on 10/22/1999.

The problem is sounding in the same vein as the Y2K computer issue that was caused by software writers using only a 2-digit year instead of prefixing the year with the century. It looks like GPS system design allows for only 1,023 weeks which is over 19 years. Those who have a computer science degree like I do (and many who don't) might notice that the rollover occurs just before reaching the "magic" 1,024 value which especially makes sense since the Global Positioning Satellite system was designed in the 1970's when computer memory and storage were incredibly expensive.

I suppose it would be interesting to know if the Safety Connect reprogramming that is going to be done under these service campaigns permanently fixes the problem or is another band-aid that is good for another 1,024 weeks (19+ years).

 

Thanks, I missed that.

 

It looks like the problem is something other than the GPS rollover since that affects the date and time. The rollover was in April of this year, and you would think that problems associated with it would have happened immediately.

This new “location” issue doesn’t start until November. There must be some other kind of date sensitive firmware problem that needs to be addressed. Lot of questions. Did they just find the problem? Why only certain models? Is it associated with Verizon?

Since the problem can easily be fixed, it obviously is nothing to worry about, but it is interesting and I would really like to know the details.

 

Do you guys know where this module is located? My car is a 08/2019 build. I wonder if it already included the update. I hope it does.

In my experience, any time they need to take any interior trims apart, something usually breaks. My CT200h for a quick example. IIRC it was some kind of side airbag bracket recall. I supposed they had to partially remove the headliner. It wasn't until much later (and after warranty expired) that I discovered they broke one of the clips that secures the ceiling light housing and it started rattling. I would hate if they had to take stuff apart on my new car.

 

Google something like "gps week number rollover" and you will find lots of relevant information on governmental, commercial and science oriented websites including why some vehicles and devices are not impacted due to being designed in compliance with IS-GPS-200 specifications.

 

Here's the letter... Interested to hear of real-world experience for a Lexus for this recall.

 

I had my 2017 RX 350 Fsport in for 30,000 and something similar was mentioned, but it was a bit obscure as to what they were talking about. I never used Enform so the tech had me cycle through the app on my phone and showed how it appears on the display screen. There was also an ICS recall they did. Both were several hours apparently and I got a loaner.

 

Mine was done last week when I had new tires installed. They gave me a loaner and had the car all day so not sure how long it actually took.