Crank Case Pressure Sensor
The Crank Case Pressure Sensor is used to monitor the pressure of the engine oil in the Crankcase, a nd signal a warning if there are any large fluctuations, or if the pressure falls below the minimum or above the maximum indicated pressure. Overpressure is often due to a diesel leakage in engine oil, which can cause damage.
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Wiring Tab
Connections
Crank Case Pressure Input
Select an appropriate input to use for the Crank Case Pressure Sensor. An AVI (Analogue Voltage Input) or SPI (Synchronised Pulsed Input) should be used.
Connection Type
AVI
An AVI (Analogue Voltage Input) is suggested.
Pull up
Enables a 1k pull up resistor to 5V.
Typically the pull up should be enabled with any two-wire temperature sensor, and disabled for sensors with their own voltage supply. If the sensor is being shared with another ECU, such as with a piggyback installation with an OEM ECU, then the other ECU will generally include a necessary pull up and this setting should be set to Disabled.
SPI
An SPI (Synchronised Pulsed Input) can be used where there are no available AVIs.
Sensor Type
Set to Hall Effect for all analogue inputs
Pull up
Enables a weak 10k pull up resistor to 5V.
Typically the pull up should be enabled with any two-wire temperature sensor, and disabled for sensors with their own voltage supply. If the sensor is being shared with another ECU, such as with a piggyback installation with an OEM ECU, then the other ECU will generally include a necessary pull up and this setting should be set to Disabled.
Calibration Tab
This allows calibrations for a Crank Case Pressure Sensor to be loaded or saved. 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. The default calibration will be for the Haltech 150psi Pressure Sensor.
From the image above:
1 – Selecting the yellow Open icon on the top left will allow the loading of a pre-configured calibration file.
2 – Selecting the blue Disk icon next to the open icon will allow the saving of your custom calibration file.
Display Tab
Warning Minimum
When the Crank Case Pressure reads below this amount, any Crank Case pressure items on the ESP software will flash Red as a warning of low Crank Case pressure.
Warning Maximum
When the Crank Case Pressure reads above this amount, any Crank Case pressure items on the ESP software will flash Red as a warning of high Crank Case pressure.
Display Minimum
Sets the minimum pressure that any Crank Case Pressure gauge can display. This does not affect the reading of the sensor, only what can be displayed.
Display Maximum
Sets the maximum pressure that any Crank Case Pressure gauge can display. This does not affect the reading of the sensor, only what can be displayed.
Diagnostics Tab
The settings in this tab allow limits to be set for the detection of either fault conditions, or conditions that could be considered to cause engine damage related to the Crank Case Pressure Sensor.
Raw Min
When enabled, this allows for the error code P1694 to be set when the voltage 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)
Raw Max
When enabled, this allows for the error code P1695 to be set when the voltage is above 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)
Operating Min
When enabled, this allows for the error code P1696 to be set when the Crank Case Pressure is below the set amount. If the Engine Protection function is active, a DTC Severity level can be selected for this condition if desired. (Default = Disabled)
Operating Max
When enabled, this allows for the error code P1697 to be set when the Crank Case Pressure is above the set amount. If the Engine Protection function is active, a DTC Severity level can be selected for this condition if desired. (Default = Disabled)
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