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MaxxECU online help

User AIN

 

Class

Specifies the sensor class to use in the system

User-defined input - Mostly used with pressure sensors or other 0-5V inputs not defined below.

ac pressure sensor - Required sensor for the AC MAGNETIC CLUTCH output function.

CAN system EXHAUST valve - Used on some OEM CAN system to control the exhaust valve(s).

CAN System Fuel Consumption Meter - Used on some OEM CAN system output data to a consumption meter (like displaying boost pressure instead).

CAN system fuel level 1 - Used on some OEM CAN system to display fuel level in instrument cluster.

CAN system fuel level 2 - Used on some OEM CAN system to display fuel level in instrument cluster.

Coolant temperature sensor - Overrides the CLT input wire and uses this input as CLT instead.

E-throttle 1, position MAIN - Input from E-Throttle 1 position input 1 (main).

E-throttle 1, position BACKUP - Input from E-Throttle 1 position input 2 (backup).

E-throttle 2, position MAIN - Input from E-Throttle 2 position input 1 (main). <-- Only used if using dual E-Throttle bodies.

E-throttle 2, position BACKUP - Input from E-Throttle 2 position input 2 (backup). <-- Only used if using dual E-Throttle bodies.

E-throttle 1, pedal position MAIN - Input from E-pedal position input 1(main).

E-throttle 1, PEDAL position backup - Input from E-pedal position input 2 (backup).

Engine oil pressure - Used on some OEM CAN system to display custom oil pressure in instrument cluster.

Engine oil temperature - Used on some OEM CAN system to display custom oil temperature in instrument cluster, or just used as a regular temperature sensor. If you have wired an oil temperature sensor to this input, select this.

engine compartment temperature sensor - Mostly used on Porsche vehicles, when there is a engine compartment temperature sensor mounted.

Ethanol % sensor (analog) - Used with external ethanol sensor with an 0-5V output. (Do not use with the GM/Continental digital sensor).

External BARO sensor - When activated, MaxxECU uses this as BARO sensor instead of sampling the MAP sensor during power on.

External map sensor - When activated, MaxxECU internal MAP sensor is used as BARO sensor instead and the wired external MAP sensor is used as MAP instead.

External wastegate pressure sensor - For usage with CO2 boost control.

Fuel pressure sensor 1.

Fuel pressure sensor 2.

Gear position sensor - 0-5V sensor to indicate the actual gear position on sequential gearboxes.

intake temperature sensor - Overrides the IAT input wire and uses this input as IAT instead.

lambda sensor bank  A - Used when an external wideband sensor electronics is wired to an analog input, selection of lambda controller is done in Inputs --> Lambda sensor.

Lambda sensor bank B - Used when an external wideband sensor electronics is wired to an analog input, selection of lambda controller is done in Inputs --> Lambda sensor.

Multi position switch 1.

Multi position switch 2.

Pattern generator RPM.

Speed, Driveshaft RPM.

Speed, front left.

Speed, front right.

Speed, front.

Speed, rear left.

Speed, rear right.

Speed, rear.

Speed, transmission input rpm.

Tune selector - Can be used as any X or Y axis, or even as the 4D axle in any table to select different "tunes" in the whole system.

 

Filter

The amount of filtering to be added to the input. Higher number = more filter --> Smoother signal

 

Sensor supply tracking

Corrects the sensor output in relation to the actual supply voltage. <-- Select correct +5V source.

When battery voltage drops, the internal voltage regulators will also drop and in severe cases as the internal 5V regulators regulates, the calibration is adjusted to make sure a correct sensor output.

 

offset adjustment

For adjusting offset, for example if a sensor is showing 0.1bar when it should be 0.0bar.

Some sensors require a voltage offset. This may be due to atmospheric changes or unforeseen external changes. Example: A pressure sensor labeled “PSIG” can be vented or not. This means the sensor’s diaphragm either vented to atmosphere or not. If the sensor is vented then it should always start at “0.0”, but when the sensor is not vented then a change in atmospheric condition will make the sensor read something other than “0.0”. You can use the offset adjustment to make the sensor read 0.0.

 

error detection

Whether to use error detection on the selection analog input channel or not. Default Disabled.

disabled - No error detection.

fail-safe value - Outputs a specified value when the system detects a failed sensor, based on user defined below/above thresholds.

set error code - Set an error code for the selected analog input channel.

fail-safe + set error code - Outputs a specified value when the system detects a failed sensor, based on user defined below/above thresholds and sets an error code.

 

Error below voltage

Specifies the below voltage to trigger error detection.

 

Error above voltage

Specifies the above voltage to trigger error detection.

 

fail-safe output value

Specifies the actual output value when an error is detected.

 

Sensor

Specifies the sensor calibration on the actual input channel. Select a predefined sensor from the list, or select the user defined sensor option to create your own calibration table.

 

Name

Specifies the name of the sensor, which will be used in the whole system.

 

Unit

Specifies the unit of the sensor used, ex bar, psi, % etc (you can create your own units here if needed...)

Note: Only visible when the below Sensor calibration table is set to General purpose/no value conversion.

 

 

Sensor calibration table

 

Value type

General purpose/no value conversion.

Absolute pressure, enter kpa, display localized (kPa or PSI). <-- "absolute pressure" which includes the atmospheric pressure.

relative pressure, enter kpa, display localized (kPa or PSI). <-- "gauge pressure" and will not pay attention at atmospheric pressure.

 

 

Examples

 

Example - A predefined sensor exist in the list of sensors, but the sensor is in kPa and you want it to be displayed in BAR.

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1. Select the sensor from the list

 

 

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2. Add some filter to the sensor to get a smoother reading, and give the sensor a good name.

 

 

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3. Select the User defined sensor from the dropdown list.

Note: When selecting the User defined sensor from the list, MTune copies the values from the last selected (and current) sensor calibration data and make it visible in the Sensor calibration table to be edited.

 

 

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4. The sensor calibration is now visible, change the value type to General purpose/no value conversion.

 

 

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5. After changed the above value type to General purpose/no value conversion, the unit is now visible, change it to suit your need (in this example Bar).

 

 

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6. Change the calibration table to suit your sensor data.

Blue box: Unit value to show at minimum voltage (0bar) from sensor (orange box, 0.5V in the above example).

Red box: Unit value to show at maximum voltage (9.3bar) from the sensor (pink box, 4.5V in the above example).

 

Also, in the above example we used the "linear sensor" calibration button (yellow arrow) which will populate the calibration table with the settings you enter in the pop up box seen above.

 

 

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7. Verify the calibration and the output.