Oil Pressure Switch
An Oil pressure switch is used as a safety device to indicate a loss in oil pressure. With the engine running, pressure is built up in the engine and the oil pressure warning will turn off. If the engine oil pressure drops too low, a warning will flash. The function of an oil pressure switch is to give rapid indication of a loss in oil pressure that could lead to damage of the engine.
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Wiring Tab
Options
Input mode
Select from either a digital switched input, or vehicle CAN input.
Output Enable
Select from either a digital switched output, or vehicle CAN output.
Connections
Oil Pressure Switch Input
Select an appropriate input to use for the Oil Pressure Switch. An SPI or an AVI (Analogue Voltage Input) can be used.
Connection Type
SPI
An SPI (Synchronised Pulsed Input) requires configuring of the edge and the type of Sensor to be connected.
Edge Select
Falling is used when the input is grounded when the switch is activated. Rising is used when the input is supplied voltage when the switch is activated.
Sensor Type
Set to Hall Effect for all switch inputs
Pullup
Enables a pullup if required to generate a voltage when the switch is off.
AVI
An AVI will require Switch On and Switch Off voltages to be configured so the Elite ECU can know which voltages on the AVI meet the conditions required.
Switch On Voltage
The voltage either above or below where the switch is considered to be ON. When selecting an appropriate value some consideration should be given to allow for voltage fluctuations.
Switch Off Voltage
The voltage either above or below where the switch is considered to be OFF. When selecting an appropriate value some consideration should be given to allow for voltage fluctuations. Eg. if the switch is at 5V when it is Off and is grounded to 0V when the switch is On, you would set the On voltage to 1.0V and the Off Voltage to 4.0V.
Example 1
The switch is at 5V when it is Off and is grounded to 0V when the switch is On. Correct settings with tolerance would be to set the On voltage to 0.5V and the Off Voltage to 4.5V. i.e. when the voltage falls below 0.5V it is considered to be ON, and when it rises back above 4.5V it is considered to be OFF.
Example 2
The switch is at 2.5V when it is OFF, and is at 12V when it is ON. Correct settings with tolerance would be to set the On Voltage to 4.5V and the Off Voltage to 3.0V. i.e. when the voltage rises above 4.5V it is considered to be ON, and when it falls back below 3.0V it is considered to be OFF.
Oil Pressure Switch Output
Select an appropriate output to use for the Oil Pressure Switch. A DPO (Digital Pulsed Output) is to be used.
Active State
Controls the whether the output is normal or inverted. Low will ground the output wire when the output is set to be On. Setting to High will invert this signal, with the output wire being grounded when the output is set to be Off, and not grounded when it is set to be On. (Default = Low)
Diagnostics Tab
Oil Pressure Switch
Oil Pressure Switch Enable
Enables the Oil Pressure Switch Diagnostics conditions.
Minimum RPM
The Minimum RPM the engine must be at for the switch DTC to enable
Precondition
MAP
Allows the minimum MAP to be the precondition for the switch DTC to enable
TPS
Allows the Minimum TPS to be the precondition for the switch DTC to enable
Both
Allows BOTH TPS and MAP minimums to be enabled, such that both conditions must be met in order to enable the switch
DTC
(not one or the other).
Minimum MAP
Sets a minimum value for the Manifold Absolute Pressure. Once the MAP rises above this, the switch DTC is enabled.
Minimum TPS
Sets a minimum value for the Throttle Position Sensor. Once the throttle position rises above this, the switch DTC is enabled.
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