Configuration
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© 2012 DynaGen Technologies Inc.
TOUGH Series User Manual
4.7.2
DM1 Messages
When the engine’s ECM detects a fault, it will send an Active Diagnostic Trouble Code, DM1, message.
The DM1 message sent by the ECU will also contain information on the type of fault as well as the
number of occurrences for the fault. If multiple DTCs are present, each will be transmitted over the J1939
network. When the DM1 messages are received by the controller controller there are 3 important pieces
of information that are captured and displayed:
INFORMATION
DESCRIPTION
Failure Mode Indicator (FMI)
The type of failure. You must refer to the engine manufacturer’s
documentation to identify the meaning of the failure mode indicator
number.
Occurrence Count (OC)
Identifies the number of times the failure has occurred.
Suspect Parameter
Number (SPN)
The parameter number.
If one of these DTCs appears, please consult your engine manufacture for the definition of this fault. With
some engine manufacturers, the text of the message can also vary slightly between engine types.
When active DTC messages are being received this will cause the controller display to lock and display
the messages. If multiple active DTCs are received the controller will scroll and display each DTC
message.
The user can also manually cycle through the DTC messages by activating either the UP or DOWN key
after the screen has been locked. If the user stops at a specific DTC message the display screen will
remain on that message for a period of 10 seconds before it begins scrolling again. Once the last DTC
message is displayed, the display will begin scrolling though other controller parameters as normal.
The DTC messages are no longer available for viewing.
DM1 Event Log
The controller Event History can store up to 30 DM1 messages (DM2 messages are not stored). Once
the 30 limit has been reached the oldest message is removed from the log to be replaced by the
incoming DM1
