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Summary of change:
'''Safety Mode ''' - prevent engine flooding caused by not following firmware upgrade steps ---- '''Usage''' - for firmware 1.1.83 (or newer) From firmware version 1.1.83 the Injector and ignition outputs are disabled after firmware upload. ** but stepper outputs aren't disable. Lots of cars have ignition coils connected to stepper outputs. IMHO stepper outputs should be disable also. And p259. And specfet. '''To reenable the ECU:''' * easy way: In '''"firmware upload" press enter''' (not "cancel" !) in the "upload saved config" step. That's all. Nothing special needs to be done in the normal case. '''For advanced users:''' * if you cancelled that step, you can also do it later: '''upload a proper config''' and VemsTune (newer than 2010-11-04) sets automatically. * OR manually: set prohibit/iButton hign and low byte manually (do it only if the config on the ECU is verified and totally good) ---- '''Background information:''' - for the curious After firmware upload the config is usually absolutely wrong. * '''If the recommended firmware upgrade process was not followed''' (eg. fuses not removed), in the past it could result in injectors open after boot ** => engine flooded with fuel or ignition fuse blown. ** this cannot happen with the correct procedure. But the procedure was inconvenient and some steps sometimes got forgotten. '''Solution:''' '''From firmware version 1.1.83 the Injector and ignition outputs are disabled by default, until they are enabled by''' either * '''a special firmware-version dependant configuration word ''' (named prohibit, 2 bytes) re-enables it ** naturally, after firmware upgrade, this word will be wrong, and need to be set. (VemsTune newer than 2010 november 03 set automatically after config upload). * '''OR''' - if using iButton anti-theft - , enabled by touching on the configured I-Button. ** needless to say, do NOT touch on, until uploading the correct config ---- '''Advanced users''' - will not be needed since VemsTune 2010-11-xx and newer calculates this and sets after config upload. Calculation example for prohibit variables: *bit 15: PS2-type *bit 14..13: 0 not using now *bit 12..10: firmware version first number *bit 9..7: firmware version second number *bit 6..0: firmware version third number *example: **non ps2 1 .1 83: **000 001 001 1010011= 0x04D3 -> prohibit high byte is decimal 4, prohibit low byte is decimal 211 There is a special code to prohibit variables which works with any firmware for developing, Use it only if nothing else works: 0xBEEF
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