Deutz EMS2, System Description

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EMS 2
System functions
4.2.6 Filling level monitoring
Depending on the engine model series, sensors are available for engine oil, coolant or reserve fluid filling
levels. Connection to the EMS 2 is carried out in two ways:
●
Via the inputs (see Chapter 5.1).
●
Or via the CAN interface from other systems (MVS, EMR).
If the warning threshold is not achieved , the diagnostic lamp is continuously illuminated. If the level rises
above the recovery threshold due to the fluid's being topped up, the diagnostic lamp is shut-off.
Whilst engine is stationary
Fluid levels are monitored whilst the engine is stationary and the ignition is switched on (terminal 15). If the
level falls below the shut-off limit, starting is prevented following a period of time which is specified in the
factory. During this enquiry time, engine starting is released until starting is prevented.
During engine operation
The engine oil level is not monitored during engine operation. For the other fluid levels, monitoring during
engine operation may also be programmed in the factory.
4.3 Indication of maintenance requirements
Maintenance requirements may be indicated in the following manner:
●
Via the maintenance/service lamp.
●
Via the ISO 9141 interface with SERDIA.
After maintenance has been carried out, the maintenance messages can be reset with SERDIA or by con-
necting the L lead of the ISO9141 interface to ground for a minimum of 5 to a maximum of 10 seconds. The
functions described in the following may report maintenance requirements, whereby each may initialise the
maintenance lamp. An enquiry regarding the functions which are reporting the maintenance requirements
can be made with the flashing code.
4.3.1 With operating time counter
When the operating time counter reaches the next maintenance interval, the maintenance/service lamp is
switched on, and the operator is reminded that maintenance is due.
4.3.2 With load population
This function is only possible if the EMS 2 receives a load signal, e.g. from another electronic control unit via
the CAN interface.
Maintenance is signalised with the aid of the maintenance/service lamp in accordance with the capacity uti-
lisation of the engine throughout the engine operation period.
4.3.3 With air filter differential pressure sensor
Depending on the engine model series, the engine is equipped with air filter differential pressure sensors. If
the air filter differential pressure exceeds the specified limit during engine operation, i.e. at engine speeds in
excess of 400 rpm, the maintenance/service lamp is switched on. The maintenance message is only reset if
the air filter differential pressure returns to normal.
4.3.4 Oil change interval calculation
This procedure is not applied in the case of all engine model series. The oil change interval depends on the
manner in which the engine is operated. Calculation of the time of the next oil change is carried out with
characteristic engine variables such as temperatures, speed, etc. When the calculation reached the oil
change limit, the maintenance/service lamp is initialised.