MyECU Optimiser Owners Manual

The Optimser uses a 16 character by 2 lines LCD display for output. 4 momentary contact push buttons and 2 potentiometers are for menu navigation and adjustment of the MyECU controller's timing map and other parameters.

To maintain some consistency of use, the buttons usually perform the same function across the various menus.

Button 1 (Left most) will enter the selected menu.
Button 2 will move backwards through the available menu items.
Button 3 will move forwards through the available menu items.
Button 4 is the cancel/exit button. This will return to the parent menu.

Main Menu

This is the initial menu afer the Optimser and ECU versions are displayed. The LCD display can be one of 3 depending on the ECU's mode of operation. The first is displayed when running open loop, the second is when running closed loop with one sensor, and lastly closed loop with 2 sensors.

----------------- |fuel/h 4.1 3.9 | |t113 r0250 xxxxx| ------------------

----------------- |4.5l/h o2 +00.0%| |t113 r0250 xxxxx| ------------------

----------------- |+00.0% o2 +00.0%| |t113 r0250 xxxxx| ------------------

The components of this display are ...

t113 is a real-time update of the throttle position sensor.
r0250 is a real-time update of the engine speed in RPM.
The fuel flow is calculated from the injection time. Where 2 are displayed, one is a fast responding value and the over is a more smoothed value.
+00.0% is the closed loop correction factor currently being applied displayed as a percentage. This can be anywhere between +/-25.0%
The xxxxx alternates between various values and can be gX.XX for gas sensor 1 voltage, GX.XX for gas sensor 2 , and vXX.X which is the battery voltage

The potentiometer has no effect but should be set to mid travel so when the other menus are entered it can be used to adjust either up or down.

Buttons 2 and 3 will traverse the available submenus ( displayed on the top line ). Press button 1 to enter the selected menu. Button 4 will restore the top line.

The bottom line also displays diagnostic messages from MyECU as they occur.

Injector Adjustment Menu

The LCD display is

----------------- |Inj-- 0,0+04000| |t113 r0250 xxxxx| ------------------

This menu allows adjustment of the injector parameters. These parameters are injector duration, injector advance, o2 target index and cylinder offset.

The components of this display are ...

The - - to the right of Inj are actually bars that represent how close the engine is operating to the break points of the map. The left bar is the throttle, the right bar is the RPM. If the bar is over centre the throttle or RPM is higher then the break point. If the bar is below centre the RPM/throttle is lower.
0,0 is the index of map cell that can be adjusted. The first digit is the throttle index, the second digit is the RPM index.
+ is an indicator that autotracking is enabled. If disabled this space is blank.
04000 is the injector duration in microseconds.
600° is the injector advance in degrees before TDC ( compression ).
o2[4] the 4 is the o2 target. Possible values are 0 to 7.
FB+0% is the front/back ( left/right ) cylinder injector duration offset.
The bottom line is the same as the main menu

The potentiometer can be used to adjust the injector parameter that is displayed. These changes will affect the engine in real time.

The map cell selected is the cell that is closest to the engine operating point when this menu is entered. If autotracking is enabled this will follow the engine operating point. Autotracking is disabled on entry

The buttons have the following effect ...

Button 1 - Write the new cell to permanent memory. The modified cell is in RAM until this is pressed.
Button 2 - Enable/Disable Autotracking.
Button 3 - This button will cycle through the available injector parameters.
Button 4 - Exit the Injector Menu.

Spark Advance Menu

The LCD display is

----------------- |Spk-- 0,0+ 05.1°| |t113 r0250 xxxxx| ------------------

This menu allows adjustment of the injector parameters. These parameters are injector duration, injector advance, o2 target index and cylinder offset.

The components of this display are ...

The - - to the right of Spk are actually bars that represent how close the engine is operating to the break points of the map. The left bar is the throttle, the right bar is the RPM. If the bar is over centre the throttle or RPM is higher then the break point. If the bar is below centre the RPM/throttle is lower.
0,0 is the index of map cell that can be adjusted. The first digit is the throttle index, the second digit is the RPM index.
+ is an indicator that autotracking is enabled. If disabled this space is blank.
05.1° is the spark advance in degrees before TDC.
The bottom line is the same as the main menu

The potentiometer can be used to adjust the spark advance. These changes will affect the engine in real time.

The buttons have the following effect ...

Button 1 - Write the new cell to permanent memory. The modified cell is in RAM until this is pressed.
Button 2 - Enable/Disable Autotracking.
Button 3 - Spark Advance modulator/Move spark advance. Pressing this button will square wave modulate the spark advance with a peak to peak variation of about 4 degrees. Pressing this button while modulation is active will move the spark advance in the current direction.
Button 4 - Stop the modulator or Exit the Spark Advance Menu.

Here's an example of how the spark advance modulator should be used.

Suppose the spark advance is 10° . Pressing this button will make the spark advance alternate between 12° for 2 seconds, then 8° for 2 seconds. Lets say the bike seemed stronger at 12° . When 12° is showing hit button 3 again. The spark advance will now move to 12° and alternate between 14° for 2 seconds, then 10° for 2 seconds.

This is repeated until no further improvement is detected. Button 4 is then pressed to stop the function and button 1 to commit the new setting.

MyECU Config Menu

This menu allows changing of ECU configuration items. The available items are - Idle TPS, RPM Limit, TDC Crank, O2 Inputs, and all 8 o2 Target voltages.

The potentiometer can be used to adjust the entry.The buttons have the following effect.

Button 1 - Write the new configuration to permanent memory
Button 2 - Go to previous configuration item.
Button 3 - Go to next configuration item.
Button 4 - Exit to the main menu

Barometric Menu

The LCD display is

----------------- |Baro 100% 12.8V | |o70° a25° 1000mb| ------------------

The components of this display are

o70° is the oil temperature in degrees celsius.
a25° is the air temperature in degrees celsius.
1000mb is the air pressure in millibars.
100% is the compensation factor computed from the above three inputs.
12.8V is the battery voltage.

The buttons have the following effect.

Button 1 - Exit the Barometric Menu
Button 2 - Exit the Barometric Menu
Button 3 - Exit the Barometric Menu
Button 4 - Exit the Barometric Menu>

Autotune Menu

The LCD display is

----------------- |Wai-- 0,0 +00.0| |t113 r0250 xxxxx| ------------------

The components of this display are...

Wai - these 3 characters give the state of the software.
The - - to the right of Wai are actually bars that represent how close the engine is operating to the break points of the map. The left bar is the throttle, the right bar is the RPM. If the bar is over centre the throttle or RPM is higher then the break point. If the bar is below centre the RPM/throttle is lower.
0,0 is the index of map cell that can be adjusted. The first digit is the throttle index, the second digit is the RPM index.
+00.0 is the closed loop correction factor currently being applied. If the map is leaner than required, this value will be positive.
The bottom line is the same as the main menu.

Wai is the initial state and means the software is waiting for the engine to approach a breakpoint. You need to adjust Throttle and or RPM. Once the breakpoint is approached the Stabilise state is entered and is now waiting a few seconds to before going to the Monitoring state. On exitting the Mon state, beause the engine has moved off the breakpoint, a change may be applied to the map the o2 correction was diverging away from 0.0%.

If a change was made you will briefly see something like "+0100 00->01". The first number is the change to the injector duration. The next 2 numbers say the cylinder offset was changed from 00% to 01%. This only happens if running 2 sensors.

The potentiometer has no effect.

The buttons have the following effect

Button 1 - Erase current limits. Normally changes are restricted to a change of 10% of the original.
Button 2 - Toggle read only mode. Read only mode is normally off. Autotune works normally but does not change the map.
Button 3 - Apply current correction to the map now. If you glance at the display and see that the bars are even and the correction value stable you can press this button. You will see the correction factor then track to the zero ( 0.0% ) value. Also you can do this to apply a number of smaller corrections rather than one big one.
Button 4 - Exit the Autotune Menu.