GPS Not Working. Home location not accurate

Gps has a separate antenna

 

It is under the dash, passenger side if I remember correctly. @gromittoo is the resident expert on the mfd.

 

If displayed GPS location changes as you drive, but is wrong, it is the system logic or the satellite ephemeris reads/captures that are erroneous.

 

If the gps antenna is weak it may not be capturing multiple satellites which degrades its accuracy.
@gromittoo ?

 

If there are streets the nav system doesn’t know about, it means they are newer than the nav database. Nothing the GPS can do to map streets it doesn’t know exist.

 

Then it is a system logic or satellite ephemeris issue.

 

Knowing nothing of the specifics, can you unpower and reset the system, force it to rebuild the ephemeris file?

 

Is there a calibration setting/button like in the ATP NAV? (Vaguely remember there's one hardly ever drive our v).

REVVL V+ 5G ?

 

I have no idea. No issues with our 2012 v Five GPS nav, though it will not lock onto Sirius XM satellites.

 

GPS antenna is usually near/in front of the radio underneath the dashboard. See this manual pg 26 (Moderators this is a link to a Toyota Owners website manual if you need to please approve) also pg 46:

https://assets.sia.toyota.com/publications/en/omnav-s/OM33A02U-00/pdf/OM33A02U-00.pdf

"Location & GPS Information" button, see that it acquires at least 3 satellites, (for triangulation).

On pg 64 there is a "Settings" tab on the top but the manual doesn't appear to explain it. Please check there for possible calibration...

 

For ATP navigation there is definitely a calibration button, see "8" on pg 111:

https://assets.sia.toyota.com/publications/en/omnav-s/OM47675U/pdf/OM47675U.pdf

 

Not on the non-ATP, but this looks very interesting.

 

So did you check if the unit is getting satellite signal/lock???

REVVL V+ 5G ?

 

Sorry I realize the manual I linked may be defective. It is available here:

Manuals & Warranties | Toyota Owners..

REVVL V+ 5G ?