GPS Reception

[vikram soni]

How's your GPS signal in leon mk3. I park my car in underground parking (-4 level ) and whenever I come out to street it takes good 10-15 minutes to get a satellite lock. But once it locks, it remains 4/5/7 satellites locked constantly and does not give me any issues with navigation.

How much time does your car take to get a gps fix ?

History of my nav unit:
I retrofitted MIB2 High unit in my car, and performed many troubleshooting steps to get gps singal, including....
1. bought 2 chinese fakra gps antenna, both never worked, one worked when I magnetically placed it over the roof outside the car, but it was.not a permanent solution. gps was always 0/16, no satellite fix..
2. bought original vw antenna (pt# 3C5035534F) and bought a fakra cable 5 meters from eBay to install this antenna. ( same situation)
3. I suspected the GPS receiver module in glovebox unit might be faulty, so I replaced the glovebox unit too. ( same situation )
4. Finally decided to buy original VW GPS antenna cable 2 meters ( pt# 000098653 )

After installing this cable the navigation appears to be working correctly, however it takes ages to get a fix every time I pull my car out of underground parking. Anyone knows any hacks/solution to this problem, please let me know..

 

[RADIOTWO]

How's your GPS signal in leon mk3. I park my car in underground parking (-4 level ) and whenever I come out to street it takes good 10-15 minutes to get a satellite lock. But once it locks, it remains 4/5/7 satellites locked constantly and does not give me any issues with navigation.

How much time does your car take to get a gps fix ?

History of my nav unit:
I retrofitted MIB2 High unit in my car, and performed many troubleshooting steps to get gps singal, including....
1. bought 2 chinese fakra gps antenna, both never worked, one worked when I magnetically placed it over the roof outside the car, but it was.not a permanent solution. gps was always 0/16, no satellite fix..
2. bought original vw antenna (pt# 3C5035534F) and bought a fakra cable 5 meters from eBay to install this antenna. ( same situation)
3. I suspected the GPS receiver module in glovebox unit might be faulty, so I replaced the glovebox unit too. ( same situation )
4. Finally decided to buy original VW GPS antenna cable 2 meters ( pt# 000098653 )

After installing this cable the navigation appears to be working correctly, however it takes ages to get a fix every time I pull my car out of underground parking. Anyone knows any hacks/solution to this problem, please let me know..

Hi

I would not thing that was unreasonable as you have had it parked underground, but you say it takes 10/15 mins to get a lock, is that with the car parked or driving for that 15 Mins ?

 

[vikram soni]

Hi

I would not thing that was unreasonable as you have had it parked underground, but you say it takes 10/15 mins to get a lock, is that with the car parked or driving for that 15 Mins ?

it doesn't matter if the car is standstill or in driving. After coming outside, it needs 5-10 minutes until I see a lock.

Sent from my LG-H870DS using Tapatalk

 

[vikram soni]

I wonder how poor their technology is. Even in a good sunny day I get maximum 7 satellites. Where my phone shows 13/14 satellite lock within seconds of enabling. gps.

Sent from my LG-H870DS using Tapatalk

 

[SteveGSXR600K1]

Something like a SatNav taking 10-15 mins to get up and running is crazy. If you were somewhere unfamiliar and needed to be guided home, you wouldn't want to wait that long before you could get going.

Are you able to relocate the GPS unit from the glovebox to the dashboard, so it has more direct visibility to the sky?

 

[BoomerBoom]

It sounds like your retrofit solution is performing a cold start each time. Normally agps data is downloaded and stored in the unit so that it already knows sat positions, hence a fast warm start like your phone is doing.

If you download a gps tool for your phone that wipes its agps data you would see a similar time to lock.

I once had a Bluetooth gps 'mouse' back in the early days which did a cold start each time and took 10 minutes to obtain a lock, this sounds similar.

 

[vikram soni]

Something like a SatNav taking 10-15 mins to get up and running is crazy. If you were somewhere unfamiliar and needed to be guided home, you wouldn't want to wait that long before you could get going.

Are you able to relocate the GPS unit from the glovebox to the dashboard, so it has more direct visibility to the sky?

My installation is exactly like factory. all parts are VW. and Placed exactly like factory installation. Even the polyester wrapping of cables so it doesn't vibrate and make noise.

The antenna is VW original and placed in the dashboard, in center speaker grill.

It sounds like your retrofit solution is performing a cold start each time. Normally agps data is downloaded and stored in the unit so that it already knows sat positions, hence a fast warm start like your phone is doing.

If you download a gps tool for your phone that wipes its agps data you would see a similar time to lock.

I once had a Bluetooth gps 'mouse' back in the early days which did a cold start each time and took 10 minutes to obtain a lock, this sounds similar.

I suspect it might be cold restart. Because everytime I drive with gps lock and I go in a tunnel, it shows 0 satellites and as soon as I come out of tunnel, it goes back to 5 satellites immediately. I have to check some configuration if I could find something, perhaps in green engineering menu.


how does your gps work when you pull out the car in the morning?

 

[BoomerBoom]

I suspect it might be cold restart. Because everytime I drive with gps lock and I go in a tunnel, it shows 0 satellites and as soon as I come out of tunnel, it goes back to 5 satellites immediately. I have to check some configuration if I could find something, perhaps in green engineering menu.


how does your gps work when you pull out the car in the morning?

Its instant, never noticed any delay in the few times I've ever tried using the car's system. Usually I use Android Auto anyway, the maps, routing and traffic are so much better.

 

[vikram soni]

Its instant, never noticed any delay in the few times I've ever tried using the car's system. Usually I use Android Auto anyway, the maps, routing and traffic are so much better.

I see. So something must be wrong with my system. I also use android auto anyways, however the google maps on android auto uses the gps antenna of my car, which drives the google crazy sometimes.

However, waze has not yet implemented this feature and still uses gps sensor of my phone even when connected to car's android auto system. So it instantly locks. ( this missing featuer in waze saves my day )

 

[SteveGSXR600K1]

This pic was taken from one of your previous posts, but when you come out of the car park, have you watched how quickly it finds the number of satellites then how many it locks onto?

 

[vikram soni]

This pic was taken from one of your previous posts, but when you come out of the car park, have you watched how quickly it finds the number of satellites then how many it locks onto?

View attachment 2956

It takes about 4-5 minutes until it locks, and it locks 4-5 satellites normally.
One more thing I noticed is that as soon as I go down the ramp and stop at the barrier to enter the garage my gps goes to 0 satellites. the garage ramp is not covered, its open like this image.

Sometimes it locks to 7, which is the most I have seen.
while driving around, sometimes it jumps here and there, overall it seems that I have weak gps signal.

I was looking at GPS repeater (something like this). The small antenna can go inside the rear spoiler near the center brake light. and the repeater unit can be placed near the vw antenna under the center speaker grill.

However, I really wanted everything to work like factory installation.

 

[RADIOTWO]

How do you get the GPS info from the car Nav system ?

 

[vikram soni]

How do you get the GPS info from the car Nav system ?

* In navigation screen, you need to enable split screen.
* A popup box shows over the map, clicking on the header of that box shows various information like compass, directions, music, position.
* Clicking on position shows the latitude / longitude info along with GPS status.

I created a thread for this menu.
https://forums.seatcupra.net/index....eck-gps-satellite-signal.447219/#post-4809527

 

[andycupra]

does it need a permanent power supply / battery to maintain memory, - it sounds like it works perfectly when power is constant, IE tunnels..
when you say it does this after parking underground... - does it do it if you do NOT park underground?

if its anytime the car if off for a period then a power supply issue is a potential cause, if its just underground then it sounds like a programming/logic issue

 

[vikram soni]

most of the navigation unit in car compensate for lost gps time by getting the car's speed and direction and moving in in the maps.
I can say that when parking and leaving, it retains its last position on the map (it doesn't show me that I am in Ingolstadt )
So, perhaps its just weak reception after all.

It improved quite a lot after I replaced the gps antenna cable with the original VW cable. Although I still think I can do better with cable, the current cable is 2 meters long, and I have to organize the cable by creating a small loop of extra length under the dashboard.

how long is the gps cable for guys with in built gps in their cars ?