Deutz EMS2, Описание системы

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EMS 2
Fault messages
8 Fault messages
8.1 Integration of the fault messages via CAN
The EMS 2 is able to communicate with other electronic engine regulation systems via the CAN interface.
Such an application includes the MVS (solenoid valve system). This transmits the fault messages to the
EMS 2, and the diagnostic lamp is continuously illuminated. The messages can then be output via only one
lamp as a flashing code. The nature of the flashing code indicates the system in which a fault is present (see
code Table, Chapter 8.4). The operator is only required to heed one lamp, wiring expenditure is reduced.
The faults and measurement values from other control units (e.g. MVS), which are read by EMS 2 via the
CAN bus, are also output via the ISO9141 interface to a notebook with the SERDIA diagnostic programme.
8.2 Output of messages on a notebook or diagnostic systems
The EMS 2 stores the fault messages and transits these as a fault code via the ISO9141 interface. The
codes are listed in the fault message Table (Chapter 8.4).
The fault messages can be read with the SERDIA diagnostic software and a notebook. In addition, measu-
rement values which existed at the point in time at which the fault occurred are displayed on the screen for
each fault.
Instead of using the ISO9141 interface for fault messages, the user may also use the SAE-J1708/1587
interface of the EMS 2 for outputting the faults on diagnostic systems.
8.3 Deletion of fault messages
Insofar as the faults no longer occur, the fault messages are automatically deleted after the ignition key has
been actuated a number of times. If the fault messages are to be deleted directly following a repair opera-
tion, the ignition is actuated a corresponding number of times in succession, whereby waiting must be car-
ried out each time during the lamp test time (approx. 3 seconds).
The fault messages can also be deleted with the SERDIA diagnostic programme and a notebook via the
ISO9141 interface or also with also diagnostic systems according to the SAE-J1708/1587 standard.