Mass Airflow Sensor
The Mass Air Flow (MAF) Sensor provides an input that directly measures the amount of air entering the engine. Up to two MAF Sensors may be used with the Elite ECU.
When using a MAF Sensor as the Fuel Load Type, the Tuning Method is typically set to MassAirFlow. With a correctly calibrated MAF Sensor, the Fuel Base table should be set to 1.000 for all values. The desired Lambda (or AFR) values should be then entered into the Lambda Target table. The Fuel Base table then becomes a correction table for instances where the MAF calibration curve is not correct.
Note that there are two units used with air flow and engine management. One is in Grams/Second (g/s) which reports the raw air flow measured by the sensor. The other is Grams/Cylinder which reports the proportional amount of air flow for the given RPM. If g/s were used for fuel mapping you would see air flow amount increase as RPM increases, whereas g/cyl produces a more usable scaling of air flow.
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Page Contents |
Wiring Tab
Options
MAF1
Enable if MAF1 is to be used as an input. Select the type of sensor to be connected.
Analogue Voltage
Select if the MAF Sensor is to be connected produces a 0-5V signal. This type of signal is common with hotwire and older flap style sensors.
Digital Frequency
Select if the sensor being connected produces a frequency signal. This type of sensor is common with Mitsubishi and some GM vehicles.
MAF2
Enable if MAF2 is to be used as an input.
Analogue Voltage
Select an AVI or SPI that will be used to connect the sensor.
Digital Frequency
Select an SPI that will be used to connect the sensor. Only SPIs can be used with frequency MAF Sensors. The Sensor Type will be Hall Effect.
Connections
Mass Air Flow 1 Input
Select an appropriate input to be used for the MAF1 Sensor. When an Analogue Voltage type sensor is to be used, select an AVI or SPI that will be used to connect the sensor. When a Digital Frequency type sensor is to be used, select only an SPI that will be used to connect the sensor.
Mass Air Flow 2 Input
Select an appropriate input to be used for the MAF2 Sensor. When an Analogue Voltage type sensor is to be used, select an AVI or SPI that will be used to connect the sensor. When a Digital Frequency type sensor is to be used, select only an SPI that will be used to connect the sensor.
Calibration – MAF1 Tab
Active only when the MAF1 has been enabled. This allows for the MAF1 Sensor calibration to be loaded, saved, or a custom calibration created. A number of calibrations come pre-installed with the ESP Software package. If your sensor is not listed, a custom calibration can be created with the data provided by the sensor manufacturer. Analogue sensors will be calibrated as Volts, and Frequency sensors as Hz over air flow.
From the image below:
*1 – Selecting this yellow Open icon will allow the loading of a pre-configured calibration file.
*2 – Selecting this blue Disk icon will allow the saving of your custom calibration file.
Display – MAF1 Tab
Display Maximum
Active only when the MAF1 has been enabled. The maximum amount of air flow that will be displayed on any gauge in your Elite ESP page layouts for MAF1.
Calibration – MAF2 Tab
Active only when the MAF2 has been enabled. The details apply as for the Calibration MAF1 Tab.
Display – MAF2 Tab
Display Maximum
Active only when the MAF2 has been enabled. The maximum amount of air flow that will be displayed on any gauge in your Elite ESP page layouts for MAF1.
Diagnostics Tab
Mass Air Flow 1 Raw Min
When enabled, this allows for the error code P0100 to be set when the MAF1 voltage or frequency is below the set amount. This is used to detect a short or disconnection with the wiring. If the Engine Protection function is active, a DTC Severity level can be selected for this condition if desired. (Default = Disabled)
Minimum Value
When the MAF1 Sensor is an analogue voltage type this will be a Volts value, and when the MAF Sensor is a digital frequency type it will be a frequency value.
Mass Air Flow 1 Raw Max
When enabled, this allows for the error code P0104 to be set when the MAF1 voltage or frequency exceeds the set amount. This is used to detect a short or disconnection with the wiring. If the Engine Protection function is active a DTC Severity level can be selected for this condition if desired. (Default = Disabled)
Maximum Value
When the MAF1 Sensor is an analogue voltage type this will be a Volts value, and when the MAF Sensor is a digital frequency type it will be a frequency value.
Mass Air Flow 2 Raw Min
When enabled, this allows for the error code P0102 to be set when the voltage or frequency is below the set amount. This is used to detect a short or disconnection with the wiring. If the Engine Protection function is active a DTC Severity level can be selected for this condition if desired. (Default = Disabled)
Minimum Value
When the MAF2 Sensor is an analogue voltage type this will be a Volts value, and when the MAF Sensor is a digital frequency type it will be a frequency value.
Mass Air Flow 2 Raw Max
When enabled, this allows for the error code P0103 to be set when the MAF2 voltage or frequency exceeds the set amount. This is used to detect a short or disconnection with the wiring. If the Engine Protection function is active a DTC Severity level can be selected for this condition if desired. (Default = Disabled)
Maximum Value
When the MAF2 Sensor is an analogue voltage type this will be a Volts value, and when the MAF Sensor is a digital frequency type it will be a frequency value.
Total MAF Range
Allows for raw MAF lower and upper limits to be set to assist with Engine Protection. When the limit is exceeds in either direction the DTC P0101 will be set.
Min
Below this amount will be considered to have exceeded the operational range.
Max
Above this amount will be considered to have exceeded the operational range.
Out Of Range Duration
The range must be exceeded for this amount of time to be considered a genuine fault. This is to prevent MAF oscillations from activating the DTC.
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