SDMO R33C3 User And Maintenance Manual page 63

D-Displaying the active service codes:
The fault finding module enables the machine faults and alarms to be displayed in real time. When a fault appears, the display shows
the message "SrvcCode" every five seconds between displaying the current parameters.
The orange LED will light up when an alarm code is displayed (engine does not stop), the red LED will light up when a fault code is
displayed.
SPN and FMI codes are used in standard J1939 to identify faulty equipment
SPN: Suspect Parameter Number.
FMI: Failure Mode Indicator.
In the event that there are no active fault codes, the following screen will appear:
Depending on the SPN/FMI code, refer to the attached "List of engine fault codes" and "Engine user and maintenance manual" for help
on fault finding and maintenance.
Note that the manufacturer documents do not always stipulate the SPN used, for example:
-Volvo uses a set of codes called PID (Parameter Identifier) or SID (System Identifier); these two names relate to standards J1587 or
J1979, but in the case of VOLVO engines they relate to standard J1587. These two codes find their equivalent in standard J1939
(SPN). The attached "List of engine fault codes" indicates the SPN equivalent to Volvo's SID and PID.
- John DEERE complies with standard J1939 and uses SPN codes.
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