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MaxxECU Introduction.

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MaxxECU - Top of the line engine management system.

MaxxECU is a Swedish based company, developing and producing our own market leading engine management system. Made by professional tuners to be the most powerful, easy to use and flexible engine management system ever made. MaxxECU is designed to give optimal performance on the track and on the street. Built-in fault diagnostics and engine protection as standard.


MTune, the modern and flexible PC software is used for all configuration, tuning.

MDash, Android app, displays all engine data to the user. Inputs also possible.


Note: This help documentation is a complement to our PDF manuals


Are you missing something? Please contact us!



Latest MTune updates


MTune 1.133

New blending feature added for Extra ignition tables and Extra fuel tables.

New Switch decoder function to be able to wire up to four switches to one analog input.

VAG DSG (DQ250) CAN control now initially supported.

New Launch control PID rpm control settings for more exact launch rpm.

Added resolution settings for AIN (0-5V), AIN (temperature), Math channels and CAN Inputs to allow different number of decimals.

Added more counter and timer channels, and added user defined names and selectable number decimal placement.

Added option to delay Lambda sensor warmup (and error detection).

New VVTi CAM trigger: Toyota 1UZ-FE.

New digital input function: Auto transmission lockup enable.

New RealTime Data value Gear delay delay settings in Speed/Gear settings, which can be used when some table axis needs to keep the last gear a short time after the shift (shiftcut gear dependencies).

New RealTime Data values for VVT PID terms.

New RealTime Data value: Knock detected.

New sensor preset: HV Electronics temp sensor.

Added an option for single cylinder engines in Engine settings.

Increased the total to 12 User tables (and added custom names an unit settings).

Increased the total to 6 Math channels (and added custom names an unit settings).

Increased the total to 8 Rate of change (and added custom names an unit settings).

Increased the range of dwell correction % value that can be used (max 1000% now).

Better layout for DIN and AIN settings pages. Made it easier to setup any AIN as digital inputs.

Now possible to connect to older firmwares (1.128 and newer) and skip firmware update if a new version is available.

PDM: Added settings for Output default states during CAN-errors, and options to force outputs off when ignition key is off.

PDM: Added settings to select Output 3-8 modes, H-bridge or normal mode (12V) on outputs 3-8.

Fixed a bug causing the undo-system not to work right with the fuel adaptation system active.

Fixed a missing Throttle blip menu item missing when only e-Throttle was selected.

Fixed a bug causing min/max duty (settings from the "user defined" solenoid) to be used on the boost solenoid output even if a preset solenoid was selected.

Fixed a bug caused the PDM20 not to work on CAN2, only affected MaxxECU PRO installations.

Fixed a bug caused the CAN keypad to use wrong CAN Protocol bus, only affects MaxxECU PRO installations.

Fixed a bug causing the Fuel EGT correction page to not show up when using EGTs on AINs on some ECU.

Fixed a bug caused the calculated ACC calculated speed to show a 10x to high speed.



Download here.

Release date: 2020-09-08




MTune 1.132

Added color highlights for changing cells, and option to filter out CAN IDs in the built-in CAN Analyzer tool.

Added 3 Bit builder channels, RT-values that can be assembled bit by bit from user configured condition. Useful for CAN Outputs.

Fixed a bug that could cause firmware update failures when doing updates from very old versions (FW 1.85 --> 1.131).

Fixed an Bluetooth input switch issue on firmware update where the status could be other than 0 or 1.



Download here.

Release date: 2020-07-29





MTune 1.131

New OEM CAN protocol: BMW E9x.

New OEM CAN protocol: Suzuki Jimny 2018.

New RealTime Data value: Brake switch active.

New RealTime Data value: Clutch switch active.

New trigger: Subaru 2-teeth cam/vvt trigger.

Added overrun cut ramp back time settings in Overrun fuel cut settings.

Added ”Ignition output cylinder 9-12” as options for all outputs.

Added option to individually calibrate EGT-sensors.

Added ”Fueling Target Error” RealTime Data values for each bank.

Added a fuel enrichment setting for the Rolling launch control.

Added option to select Driven, Undriven or VSS as deactivation condition for the Launch control.

Added an option to set the allowed voltage outside the defined range for E-throttle Pedal position (to allow for the kickdown range).

Added a warning when the table memory is almost full, or very fragmented (and help on how to fix it), Memory almost full / fragmented.

Added user description text settings for PDM keypad buttons and User Cut tables.

New digital input functions: Electric waterpump override input, Fan override input and FAN + Electric waterpump override input.

Options to calculate transmission input RPM from driveshaft rpm (or wheel speed) and gear ratios in Sensor setup.

Direct Output control from PDM1 outputs can now be used in the ECU too (so PDM user outputs can control ECU outputs too).

More settings for PDM Turn signal control/”Hazard warning lights” can be now be activated by holding left and right buttons for 1 sec in button mode.

New options to assign Keypad LED colors based on user defined conditions.

Options to set Keypad backlight level with lights on and off (when using a PDM).

PDM Lights, park outputs are now also activated by the Light low beam or Lights, high beam inputs.

Added an ”Engine Stalled” warning mode to the PDM brake light output settings.

Added a PDM Turn signal light, constant flashing  for turn signals controlled by external switches.

Fixed a bug that caused the fuel pump priming time to be shorter than set in some cases.

Fixed a bug causing injector output tests in Single pulse mode to send shorter pulses than programmed.

Fixed a bug that could cause missed ignition events on trigger systems with very few teeth in some unique situations.

Fixed a bug where the log viewer didn't keep the selected data on screen when zooming.

Fixed a bug causing the trigger logger Synced/Not Synced coloring to not work when in cam logging mode.

Fixed a bug caused MaxxECU MINI to not reflect the IGN output voltage setting (5/12V).

Fixed a bug in BMW DCT control where shift status was not correct when in Reverse gear.



Download here.

Release date: 2020-07-22



MTune 1.130

Note: Always use our latest software version (currently 1.133), which contains the latest features, fixes and improvements.


Fixed a bug GUI rendering bug in the E-Throttle settings caused some settings not be visible.

Fixed a bug from MTune 1.129 causing outputs INJ13-16 (PRO) to not work.


Download here.

Release date: 2020-07-06



MTune 1.129

Note: Always use our latest software version (currently 1.133), which contains the latest features, fixes and improvements.


New Fuel Adaptation (”long term trim”) function with "apply to" main VE table table feature.

New Knock control adaptation table (”long term trim”) function.

Individual cylinder knock detection and individual cylinder sensitivity adjustment, Knock sensors.

New retard step mode setting in Knock control.

Live 3D surface autotune feature (experimental testings).

Improved idle control with the new Idle target ramp down feature

Improved Tune problems detection system.

The built-in CAN Analyzer tool can now also capture "only outgoing data".

New trigger: Subaru MY06 - MY14 (WRX STI).

New trigger: Nissan QG18.

New trigger: Suzuki K15B cam/vvt trigger.

New trigger: Ford Cosworth (4 on crank, 2 on cam).

New Trigger: Ford BARRA (CAM).

New Trigger: Nissan VQ35DE.

New trigger mode: Missing teeth (bipolar) for unusual missing tooth wheel designs (some Renault's).

Added a new advanced triggers option, Missing gap gating. Useful for high compression/light engines with cranking problems.

Added time and voltage value display at the current cursor position in the built-in Trigger oscilloscope diagnostics tool.

Updated USB driver.

RealTime Data values can now be selected by clicking the text also, instead of just the check box.

Log selection can now be made from the right click menu.

New injector presets: Honda CBX1100X11 (OEM), SFI smartfire 1600cc, KTM500 (OEM), Bosch 443cc, Bosch 390cc, Bosch 790cc.

Sensor preset update (Honeywell PX3).

Improved EGT filter performance  (smoother looking EGT data in logger).

Added a dead time setting for the User PID output function.

Added option to disable the Radiator FAN output control when the engine is off.

Speedometer output can now be calibrated using a table.

Added min RPM settings for the VVT control.

Injection and ignition output test function will now work with secondary injectors, trailing ignition and ign/inj outputs assigned to other outputs.

Added settings for ignition angle lock on the Trigger settings page.

Disable fuel and Disable ignition check boxes in Trigger settings page.

Fuel consumption is now transmitted on the Audi S3 1.8T 2003 (ME 7.5) OEM CAN protocol.

New RealTime Data value added:  "Throttle Blip Active”.

New ECU error code: 87 - CAN-bus: No connection with PDM module.

New PDM error code: 91 - System shutdown from shutdown input.

PDM: Added intermittent wiper mode.

PDM: Added a 3-blink function for the Turn signal control.

PDM: Added a Main power safety shutdown digital input function.

PDM: Input buttons / Keypad buttons can now control up to 3 functions each.

Improved e-throttle sensor error detection for voltage outside the calibrated range.

Idle closed loop disable over RPM max value changed.

Improved the gear adjustments boost control correction to be able to add boost.

Raised the MAX RPM max value in Ignition lock/idle control.

BMW DCT gearbox control: New Speed gear ratio correction setting added.

BMW DCT gearbox control: Improved TCU speed Source (DYNO mode) to be able to shift without a speed sensor on the dyno.

BMW DCT gearbox control: New blip delay function added.

BMW DCT gearbox control: Adjusted internal torque calculation model.

BMW DCT gearbox control: Adjusted torque calculation model during downshift, to try to easy up the downshift tuning.

BMW DCT gearbox control: New and updated DCT Realtime Data values.

BMW DCT gearbox control: Change of behavior to try to keep the current gear engaged, where some customer experienced disengage of clutches at higher gears and no pedal engagement.

Fixed a bug in BMW DCT gearbox control which disengage clutch in Reverse gear.

Fixed a bug where the CF18 DCT error code was present all the time on the BMW DCT gearbox control.

Fixed randomly memory exception crashes in MTune.

Fixed a bug where ignition cylinder trim was i event order, not cylinder order.

Fixed a bug where the secondary hold function on CAN keypad did not work as expected.

Fix for an ABS warning light on some Mazda RX8 vehicles using the Mazda RX8 OEM CAN Protocol.

Fixed a bug where online log recording could be started before the ECU was connected (and the default tune was added as the tune file).

Fixed a bug in EGT output scaling to the KMS CAN Display.

Fixed a bug where the knock peak value did not reset in Knock control.

Fixed a bug caused the user table enable setting to not be respected.

Fixed a bug causing the UNDO function (CTRL-Z) to accidentally write the default tune to the ECU if pressing pass the amount of stored undo steps.

Fixed a bug caused the E-Throttle position setting page to be empty under some circumstances.

Fixed a problem that could cause VVT PID windup.

Fixed a bug that could cause WBO errors in Engine Startup mode when stalling the engine and waiting more than 2 minutes before restarting.



Download here.

Release date: 2020-07-03