N95 connection with Toyota TNS510 Nav disconnects ...

Question

Recently bought Toyota Verso incl. a SatNav TNS510. The N95 should be able to work with th BT connection according all spec-sheets.
The sheets mention older Firmwire versions (I am using the V31.0.017).
After the initial connection, it is interrupted after about 20 min. (sometimes when signal when battery is full loaded).
The reconnection after restarting fails and can only be accomplished by simultaneous connection of TNS510 and N95. Still the connection is only temporary.
I tried a 6300 model and this one does not give any problem.
I expect a bouncing answer from Toyota and it must be due to the N95 seeing other phones don't have this problem. I can't find any issues by googling.
Maybe someone knows and it is just about a setting?
Bart

Answer 1

Bart,
If you check the Toyota compatibility site, you will see that the N95 doesn't work with TNS510. Check this site: http://techdoc.toyota-europe.com/bluetooth/search.​aspx
I face exactly the same problem when pairing my E71 with my TNS510. It can connect when setting it up, but next time entering the car is disconnects, so I have to start up the connection procedure manually each time.
Also, I face that it disconnects without notice after e.g. ½ hour or so from time to time. Also, when receiving a SMS it disconnects.
Talking to Nokias support in Denmark, they are aware that with E71 there are a number of connectivity issues via Bluetooth, but despite of their friendly associates, they are not able to solve this. The best advice the Nokia associate could provide was to contact some of their business centre, who install the car-kit equipments, to see if some of them working with this in practice had solved the issue.
I did - and spoke to 5 of them - and two of them said, that the E71 runs with Bluetooth 2.0, and if the TNS510 runs Bluetooth 1.2 - it makes problems. Despite that 2.0 units should be backwards compatible, - it won't, they said.
I have tried to connect with a Nokia 6500 to my TNS510, and it works perfect. Checking the technical specs at Nokias website - it says the 6500 runs BT 1.2!!!.
Checking the Toyota website - there is a compatibility site, where you can check if your mobile works with your TNS510. A green "check" if OK, and a red cross if it doesn't. Checking my E71, it has red crosses for all the 8-10 features that apply, and the 6500? - a nice green check!.
Picking up a random list of all mobile phones with red crosses - they are BT 2.0, and the ones with green checks - they are BT 1.2.
Back into the TNS510 250-pager manual - no info about BT version, but my - in any cases premier class -Toyota dealer checked it out with the Danish Toyota importer, and the answer was, - ? Yes, you are right: BT 1.2!!
So, I'm convinced that it is here the issue is based. The BT 1.2 in the TNS 510 simply doesn't work with the BT 2.0 in the E71!
The Nokia Business centre - both - said to me, that it was quite unlikely that the TNS510 was running BT 1.2, as it is quite new - launched in the end 2008/start 2009 - and this older technology was left years ago, in accordance to the specialists.
Back asking my super Toyota dealer - he spoke to the importer - to find out two things: 1. Why it runs BT 1.2?, and 2: Is it possible to get the TNS510 upgraded into BT 2.0? (because in accordance to Nokia you can't downgrade your E71 from BT 2.0 to BT 1.2).
The answer to running 1.2. was, that the navigation system - which is a part of TNS510 is connected to the engine computer system, and allowing the BT 2.0 to the Bluetooth part of the TNS510 it would create potential risk for interruption in the engine computer system - from virus or likely bad things from the E71- cause BT 2.0 is a more open and speedy connection than the BT 1.2. I have no reasons to believe that my dealer is giving me wrong information, but I have major difficulties in understanding why the manufacturer of the TNS510 isn't able to separate the Bluetooth part from the navigation part of the unit. We got a man at the Moon in '69, and safe back, and Toyota can't get this to work 40 years after.......
About upgrading TNS510 into Bluetooth 2.0, - the answer was that there was no actual plans :-(
However, my Toyota dealer meet up with the usual spirit of complete customer satisfaction, and said that the right and formal way was to raise a "technical notification" to the importer, which will be gathered together and provided to the European Toyota centre in the end. And so he has done, and I'm just hoping that it will make a change.
So, - Dear suffering TNS510 fellows, including you Bart! - If you face the same issue between your Toyota Navigation System TNS510 and your E71 (or any other Bluetooth 2.0 phones - Nokias N and E series are in general running BT 2.0), and realise that it is caused from BT 1.2 and BT 2.0 incompatibility - please go to your Toyota dealer, and ask him to raise a "technical notification". As more we are in Europe who make this claim - as higher attention we can bring into this issue from Toyotas side - leading Toyota into solving our problems in upgrading the TNS from Bluetooth 1.2 to Bluetooth 2.0.
Enjoy your Toyota trip - well connected between your TNS510 and your E71 some day in the future!
/The Avensisdriver