US / Europe Nav DVD - no voice guidance

2005 Prius with Nav package.

After only 7 months in the Bay Area, we got transferred to Europe for a (pre-defined) two years. Of course, the Prius got shipped. Trust me, after having my wife being the navigator, with laptop on her lap and Garmin GPS lying on the dash, I was really really motivated to get the European DVD. Turns out this was more difficult than anticipated, but finally I did get a more or less working version.

The "more or less" part is where I could use some help:
The navigation part (map display, turn information ahead, etc.) works great - just like the US version. Route calculation is also very similar, with a choice of three different routes, ... - all as expected. However, there are no voice commands. Total silence. Interestingly enough, when I input a new route, and then switch to the US DVD, the voice prompts start ("please proceed to ..."). Of course, the display only shows Lat/Lon, since no chart info is available.

Looking at the two DVD's I found some differences as follows:

US DVD: (version 04.05.01)

directories: "Coverage" and "IDX"
files in root directory:

ALLDATA.KWI
COVERAGE.TXT
DICVCE56.KWI
INDEXDAT.KWI
LOADING.KWI
METADATA.KWI
SPEC.KWI
VERSION.TXT
VIRUAL0.DAT
VERTUAL1.DAT


European DVD (Aisin 2004-2005 version 04.00.08)

directories: "206", "214", "BMP", "IDX"
The 206 and 214 directories contain one .bin file each.

files in root directory:
00.VNS
ALLDATA.KWI
COVERAGE.TXT
DICVCE56.KWI
DUMY0E.KWI
DUMY1E.KWI
DUMY1S.KWI
INDEXDAT.KWI
LOADING.KWI
VERSION.TXT
VOICEDAT.KWI

Any thoughts on what to hack (bios/flash, European DVD) to get the voice prompts?

 

This is not the same as mine, recently supplied with a 2005 Prius. The DVD is Europe 2004-5 (Version 2.0). It doesn't cover every country in Europe, and not every country is fully covered.

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Actually, this IS the same disk - on the disk itself it says 2004-2005 version 2.
Part Numbers on the disk:
86271-64012
86271-60V542

The "version 04.00.08" is what is listed on the screen when you go into the diagnostic mode ("Navi Menu, Disk information").

 

DanMan32, how do you get to the LOADING settings? I got to the diags ok, but only two levels worth... I do have the manual(s), but could not find any reference to LOADING. BTW, found an inconsistency in the manuals: To exit diags, pg. 05-1770 says press "info" for 3 secs (does not work). Pg. 05-1888 says press "Display" for 3 secs (have not checked this out yet).