Like anything software-related, if you choose to follow the following guidance, you do so at your own risk. Firmware updates generally go well, but there can be unexpected problems resulting from things such as an incompatible SD card, a wrongly formatted SD card, an SD card that still has other files or folders on it not related to the upgrade (always format the SD card first); a corrupt firmware file, firmware files not copied across properly or even a faulty Head Unit, which a firmware upgrade may not fix and may leave it in a worse state.
Although it is possible to update the firmware on this system directly to the latest version, if you have an early firmware version, some people prefer to update one revision at a time. This allows them to check that the upgrade worked ok before going on with the next. If there should be an issue with one particular update, then having a later one to apply may resolve any issues.
First of all be prepared:
You need time: at least 30 mins for the update process from when it starts to update.
Engine Running: You MUST leave the car running - ignition on is not enough as if the car goes into economy mode it may leave the unit in an inoperable condition.
You will need a blank SD card: A SDHC Class 10 (4 or 8 Gb Minimum) will be fine - but nothing too fast and fancy as you don't want compatibility issues.
Don't use your Navigation SD card to perform the firmware updates! Some later map updates are protected in such a way that prevent the files from working if they are moved from the SD card and copied back later. SD Cards are cheap these days, don't be tight!
You will need an unzipping / archiving programme that works with RAR files: - I recommend the Open Source '7Zip' software from here:
7 Zip Org. 7-Zip is free to use and is a great utility. Select the right version for your system, download and install.
- Put the SD card into your PC. When the PC recognises the SD card it will assign a drive letter. Right Click the Drive letter and choose 'Format'. Make sure you select the FAT32 File System. Make a note of the Drive letter assigned to the SD Card.
- Create a new folder on your PC (not the SD Card) and copy the relevant firmware file into the new folder you just made.
- Right Click on the firmware archive. There should be a 7-zip menu, next click '7-Zip' and another menu will drop out (see picture). Choose 'Extract Files'
(Click to zoom image)
- In the next box, choose the Letter assigned to the SD card earlier, or browse and select the drive letter. Then choose OK.
- When complete, there will be a file called 'HBUPDATE.DEF' and a folder called 'HEADUNIT' with a lot of folders and files inside. There shouldn't be anything else in the root of the SD card.
- Next go to the car, insert the SD card and start the car.
- The system should detect the firmware update and ask you if you want to proceed.
- Follow the instructions and do not fiddle with the buttons or the Head Unit whilst the update is in progress, unless responding to instructions.
- If all is successful the unit may restart and you should have the new firmware installed.