How to make a service (cure) firmware for your Garmin unit

**ddabcd277** · 9th September 2011, 08:36 PM

@ kunix

Thank you! I am just going to examine your patch.

To be hones with you I am not interested in the method as a way for fixing. I am sure it would help a lot. Mainly I am interested in the patch itself.

Cheers,
DD

**kunix** · 10th September 2011, 03:01 PM

@ddabcd277
So what can you say?

**ddabcd277** · 10th September 2011, 03:14 PM

@ kunix

You are working well on IDA

Unfortunatelly, I don't understand much from disassembling.

**gpsnoob** · 24th September 2011, 04:39 AM

Hi, tried flashing my 1450 with a cure FW (wrong GCUPDATE.gcd file inserted), the unit won't start on pre-boot, just reboots all over again in loading software. Tried updater.exe and finally caught the unit to flash the cure FW (backup of the original GCUPDATE.gcd + hex edited) then successfully booted now, after which, I flashed again the modified FW (US+PH FW) and not returning ang GCUPDATE back to the .System folder of GPS. After all, I've noticed something different. No GPS version on settings - about, no predictive text, and other stuff. Tried testing it outdoors, no satellite lock. After hours of turned off GPS, tried testing it again without changing anything, surprised it worked (satellite lock)

Did I do something wrong? I was thinking I messed up the GPS system?

aekhong · 24th September 2011, 09:02 AM

If you can see Ph JCV so it means nothing wrong.
Satellite lock may take a lot time for first fixation but you can set location at the position you are standing and Nuvi will take a little time to fix..

**gpsnoob** · 24th September 2011, 09:29 AM

Originally Posted by aekhong

If you can see Ph JCV so it means nothing wrong.
Satellite lock may take a lot time for first fixation but you can set location at the position you are standing and Nuvi will take a little time to fix..

Oh.. I see. Good to hear nothings wrong with my unit. Thanks for the reply

victormicheal2112 · 19th October 2011, 11:32 AM

Hi,

I have a nuvi 1250 and 1350 which is unable to enter into usb mode. When i plug in the usb connection the progress bar show about 1cm then it continues to load to the normal gps mode.
So far the only way i am enter the usb mode is to touch on the left top corner of the screen and connect the usb cable until it enters the usb mode. Anyone have ideas?

**catymag** · 19th October 2011, 04:54 PM

Try entering diagnostic menu [ battery symbol - on the main screen (hold 6 seconds)]
plug it USB and check updater

crazybobzy · 23rd October 2011, 01:31 AM

Howdy All,

Formatted my nuvi 1250 with NTFS, Hardware ID: 971, Unit ID: 3636440540 (from G7toWin). I've tried creating a few cure files and uploading them using updater with no success, updater tells me the update is successful however the device just reboots and then sits at the first garmin screen.

If anyone could point me in the right direction, that would be awesome. (hopefully not garmin tech support) :P, I think i'm just following the steps wrong.

Cheers,