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Summary of change:
'''Subpage of VemsTune''' Upgrading firmware requires some '''hardware and software preparations'''. '''Hardware preparations - IMPORTANT:''' '''When uploading new firmware''' to a controller (even with a motronic55 connector!), to prevent filling cylinders with fuel or possible igncoil or igndriver damage: * '''remove ignition fuses''' * '''remove injector connectors and remove fuelpump relay''' ** or otherwise make sure the fuelpump is off, eg. hidden anti-theft switch ** Upload and verify config, and measure voltage in the injector connectors before powering the fuelpump ---- '''Software preparations''' GenBoard/UnderDevelopment/FirmwareChanges lists changes between versions. When upgrading from 1.1.27 to 1.1.56, dozens of entries contain a lot of (sometimes boring or even hard-to-understand) changes. * some of them are interesting for a certain user, others are not * some are possible to upgrade automatically, or fill in with reasonable defaults. Before 2009-06-30 the following steps applied (briefly): * with 1.1.27 "Tools/Firmware/Download config" saves vemscfg * "Tools/Firmware/Firmware upload" 1.1.56 firmware * '''it was recommended to manually "Tools/Firmware/upload config" an 1.1.56 vemscfg file with "reasonable defaults"''' * than "Tools/Firmware/Upload config" the vemscfg file (saved from 1.1.27 in the first step) Since '''2009-06-30 VemsTune can fill in the missing variables with "reasonable defaults" for 1.1.56 or newer firmware. This makes upgrades simpler''', and far less likely for someone to have noise in MAT/TPS retard or MAT/TPS enrichment tables. It is still recommended to review dialogs and tables.
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