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Garmin DriveSmart 51 Restricted Mode Option Not Available

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  1.     
    #1

    Default Garmin DriveSmart 51 Restricted Mode Option Not Available

    I just got a used Garmin DriveSmart 51 and the Restricted Mode option under Navigation is not available. The GPS is always on restricted mode. You cannot change it. I believe this GPS was sold to a car rental company and the option was disabled by Garmin. I am wondering if there is a firmware patch to make the option available. Love this forum by the way and thank you for all the hard work you are putting into to make this a great site.

    Garmin DriveSmart 51 Restricted Mode Option Not Available

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    TheDogg Reviewed by TheDogg on . Garmin DriveSmart 51 Restricted Mode Option Not Available I just got a used Garmin DriveSmart 51 and the Restricted Mode option under Navigation is not available. The GPS is always on restricted mode. You cannot change it. I believe this GPS was sold to a car rental company and the option was disabled by Garmin. I am wondering if there is a firmware patch to make the option available. Love this forum by the way and thank you for all the hard work you are putting into to make this a great site. Rating: 5

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    Garmin DriveSmart 51 Restricted Mode Option Not Available
  3.     
    #2
    Garmin Mod
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    Garmin_Nuvi's Avatar
    Garmin DriveSmart 51 Restricted Mode Option Not Available
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    Have you tried "restore"under Settings or "Clear all user data" (Volume screen.hold top right of screen until Diagnostics Page comes up)?
    Last edited by Garmin_Nuvi; 3rd February 2021 at 02:58 AM.
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  4.     
    #3
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    I just tried "Clear All user data", but it made no difference. The option is still available.

  5.     
    #4
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    Garmin DriveSmart 51 Restricted Mode Option Not Available
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    So you cannot unselect the green check ?
    Unless you are a "New" member, having used the Thanks button regularly is the quickest way to get help.

  6.     
    #5
    That whole option is not even visible. Either Garmin remove or hide per request from the car rental company. When I looked at the device information, it show "Rental Location:16", which led me to believe it was specially made for car rental companies. Funny enough I was able to install the latest patched firmware without any problem so that it can accept unlocked map. However, the "Restricted Mode" option is still not visible.

  7.     
    #6
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    Garmin DriveSmart 51 Restricted Mode Option Not Available
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    Using the Patched firmware and it not changing would suggest it is not part of the Firmware.
    Last edited by Garmin_Nuvi; 4th February 2021 at 06:53 AM.
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  8.     
    #7
    B1ng0's Avatar
    I agree with the above conclusion in that it's not part of the main system software if the device has the usual HWID of 2586 for Drive/DriveSmart 51 US/EU. Universal Patcher only patches fw_all.bin, the main component of the firmware which is flashed to region 14 however there are other components flashed to regions 127 and 158 and Garmin could have used either of those or even region 16 which controls the splash screen to disable the Restricted Mode selection. If that's the case, flashing the full standard firmware (original or patched) would re-flash both regions 127 & 158 but not the logo region 16.

    Does this device have HWID 2586? Importantly does it show the usual plain black, white and blue Garmin logo on start up or is it a different image?

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    Garmin_Nuvi (10th March 2021)

  10.     
    #8
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    Garmin DriveSmart 51 Restricted Mode Option Not Available
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    I can confirm the HWID is 2586,TheDogg will hopefully let you know about the start up screen, even though he said he could live without the restricted option being available.

    I would as always be interested in your extensive understanding of the firmware and solution
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  11.     
    #9
    B1ng0's Avatar
    @Garmin_Nuvi
    I suspected that it was running standard US/EU firmware for HWID 2586. It's easy to re-enable all features on a hire car device if Garmin issues them with custom firmware and a special HWID like they did with some older devices. They could be made standard by flashing the standard fw in preboot which changes the HWID and even remaps the region layout if necessary. Such customized device would even 'lock' themselves after 30 days and ask for a 6 character PIN which only the hirer know, thereby discouraging theft.

    If the device runs standard firmware (i.e. with same HWID as the usual retail device), the other way that Garmin disables/enables features is by use of a region other than the primary fw region (14). This is the case with nuvi 1xxx devices and the earlier 2xx/W series where region 16 was modified to effect the changes between, for example, 1300, 1310, 1340, 1350 and 1390 which all use the same firmware. In that case it was LA, SL, JCV and for 11x0/12x0 even TTS could be controlled by the logo file flashed to rgn16. They also did a similar thing with the (EU only) nuvi 710 which could have TTS enabled by flashing the AU 7x0 logo to it.

    Sometimes even with custom firmware, Garmin would supply a custom logo for the hire companies' devices and the modification might be meaningful or just have a different image for the relevant company.

    Hence my interest in the splash screen, if it's got a custom image it might also have some modification to the BIN file data which disables features.

    If TheDogg would dump region 16 to MicroSD card using rrgn command, we could compare it to a usual logo from US/EU DS51 if one is available.

  12.     
    #10
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    Garmin DriveSmart 51 Restricted Mode Option Not Available
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    Dump of region 16 from Standard DS51 with usual logo


    gir pl ƒ < < X t ™ girimg girclr girfnt girblob Q 350100 DB, splash screen, 480x272 Garmin OS, GIR2 1.00 N+ x x D D x x D D ‰PNG


    16_backup(Standard unit ).rar

    SD card to copy region 16
    Garmin.rar
    Last edited by Garmin_Nuvi; 11th March 2021 at 06:21 AM.
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    B1ng0 (11th March 2021)

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