2017 TRD Navigation GPS Location Drifts

[hereinhelena]

The navigation system on my 2017 TRD Pro worked perfectly for several years. It now works perfectly when I start it each day & seems to work for the first hour or so (e.g. it is always good when driving around our small city). It does, however, begin to drift off location after perhaps an hour or so (like when on a road trip). By the end of a day's drive, it may be off by 100 or 200 miles. This happens on nearly every longer trip. I have confirmed that it is losing the GPS signal by entering the diagnostic mode. (Hold "Audio" & switch the driving lights "Off-On-Off-On-Off-On-Off"). I have also confirmed that the GPS is working when I start the car in the morning. Turning the car off & on (like when fueling) does not get it working correctly. I believe it is losing GPS after an hour or so for some unknown reason, then relying on the the vehicle sensors (speed & gyro) to predict the location - hence the gradual, ever increasing drift. It is very seldom (maybe once) that it "refinds itself" without sitting overnight. I didn't note any error codes on the diagnostic screen. Does anyone have any ideas regarding how to further troubleshoot this?

 

[osugsxr]

The navigation system on my 2017 TRD Pro worked perfectly for several years. It now works perfectly when I start it each day & seems to work for the first hour or so (e.g. it is always good when driving around our small city). It does, however, begin to drift off location after perhaps an hour or so (like when on a road trip). By the end of a day's drive, it may be off by 100 or 200 miles. This happens on nearly every longer trip. I have confirmed that it is losing the GPS signal by entering the diagnostic mode. (Hold "Audio" & switch the driving lights "Off-On-Off-On-Off-On-Off"). I have also confirmed that the GPS is working when I start the car in the morning. Turning the car off & on (like when fueling) does not get it working correctly. I believe it is losing GPS after an hour or so for some unknown reason, then relying on the the vehicle sensors (speed & gyro) to predict the location - hence the gradual, ever increasing drift. It is very seldom (maybe once) that it "refinds itself" without sitting overnight. I didn't note any error codes on the diagnostic screen. Does anyone have any ideas regarding how to further troubleshoot this?

id recommend retrofitting the 2020 plus car play HU if you plan on keeping the suv for a few more years or just replace current HU with another. HU/GPS will fail over time

 

[hereinhelena]

osugxr: I am not convinced that the problem is with the head unit. So far, my best guesses are the gps antenna, or perhaps the gps antenna connection. I also have an amateur radio installed. I suppose there is a possibility that I am getting RF into the electronics that temporarily disables it.

 

[osugsxr]

osugxr: I am not convinced that the problem is with the head unit. So far, my best guesses are the gps antenna, or perhaps the gps antenna connection. I also have an amateur radio installed. I suppose there is a possibility that I am getting RF into the electronics that temporarily disables it.

check link below, for gps antenna

 

[hereinhelena]

osugsxr: Thank you for the link. I will have to look for the "red x" over the gps signal the next time it fails. I don't recall seeing that - meaning that either I missed it, or that the "red x" only shows up with a complete disconnect of the antenna (as in the video). My antenna is obviously connected since it works for the first hour or so. My current working theory is that the problem is related to the 2-meter amateur radio. It beacons out periodically & it is possible that it causes some trouble with the Nav. system. I found that the amateur radio antenna was slightly loose in its mount, which could increase RF troubles. It is now tightened & I will be going on a trip this weekend. In any case, it is strange that once the car gps fails, it does not want to reinitiate. Neither a long press on the volume knob, nor turning the car off & back on reinitiate it. It does, however, seem to reinitiate after sitting overnight. I'll let you know if the problem is resolved now that I have tightened the amateur radio antenna.