Failsafe
In case of failure of essential engine's sensors, EMU device is equipped with a protection, enabling
fail-safe operation of the engine under certain conditions. Smooth operation of the engine and its
power will be significantly decreased, however this allows to keep the vehicle’s mobility, which
allows you to reach the service point. In case of failure of any sensors IAT, CLT or MAP, EMU
device will automatically take on values determined by the user for the damaged sensor. These
values can be adjusted in the parameter set Failsafe.
PARAMETER DESCRIPTION
MAP fail safe Fail safe value for Manifold Air Pressure (MAP) sensor
CLT fail safe Fail safe value for Coolant Temperature (CLT) sensor
IAT fail safe Fail safe value for Intake Air Temperature (IAT) sensor
FPRD failsafe
Fuel Pressure Rail Delta Failsafe function allows to limit engine RPM and indicate failure with
Check Engine light when Fuel Pressure Delta (difference of Fuel Pressure and Manifold Air
Pressure) exceeds defined values. Fuel pressure sensor needs to be connected and calibrated for
this function to work properly (Sensors setup/Extra sensors).
To enable Check Engine Light indication, Report fuel pressure failure option must be checked in
Other/Check engine parameters.
PARAMETER DESCRIPTION
Enable failsafe Activates FPRD failsafe function
Minimum FPR Delta Minimum FPR delta interpreted as correct
Maximum FPR Delta Maximum FPR delta interpreted as correct
Delay
Minimum time period with abnormal fuel pressure required to activate
failsafe
Enable rev. limit Enables RPM restriction in case of abnormal fuel pressure
Rev. limit
RPM limit for fuel cut, enabled when abnormal fuel pressure is
detected
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