Exhaust Manifold Pressure Sensor
An Exhaust Manifold Pressure Sensor, commonly referred to as a EMAP Sensor, is used to measure pressure in the exhaust manifold. An EMAP Sensor is a powered sensor that typically has three wires; a 5V+ power wire, a signal wire to the ECU, and a Signal Ground. Care needs to be taken when installing an EMAP sensor so that the pressure line is not damaged by the high temperatures experienced with the exhaust manifold. EMAP sensors are often used for monitoring turbine efficiency and for MAP/EMAP engine tuning.
Enabling this sensor will allow the Engine Pressure Ratio tuning method to be used.
Exhaust Manifold Pressure Configuration
On this node, the Exhaust Manifold Pressure sensor calibration can be loaded or entered manually. If you have purchased a Exhaust Manifold Pressure sensor from Haltech, calibrations can be loaded directly into the calibration table by using the 'Load from File' button. Calibrations can be saved to file by using the 'Save to File' button.
Filter
This table sets the filter for the Exhaust Manifold Pressure value. A higher filter will increase filtering on the signal, but will delay the value used by the ECU for calculations. A lower filter will decrease filtering on the signal improving responsiveness to the signal but may allow noise to affect the value used by the ECU for calculations.
A high filter value of ~100ms may be required due to exhaust gas pulses creating fluctuations in the signal.
This node sets the display settings for the Manifold Pressure channel.
Warning Maximum - Sets the pressure at which the EMAP sensor Number Displays, Gauges and Bars will enter their warning state
Display Minimum - Sets the pressure at which the EMAP sensor gauge and bar displays begin. This also sets the minimum pressure allowed to be used in settings and tables.
Display Maximum - Sets the pressure at which the EMAP sensor gauge and bar displays end. This also set the maximum pressure allowed to be used in settings and tables.
This node allows the enabling of high and low voltage DTCs as well as Minimum and Maximum pressure DTCs for the Exhaust Manifold Pressure sensor.
A DTC severity can be set for each voltage and pressure, which will trigger an Engine Protection level for the relevant setting.
This node allows you to assign the input for the Exhaust Manifold Pressure sensor.
Exhaust Manifold Pressure Sensors use an Analog Input. Any available AVI can be used.
It is recommended to disable the Pull Up.
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