Configuration
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© 2012 DynaGen Technologies Inc.
TOUGH Series User Manual
4.7.3
DM2 Messages
DM2 messages are previously active fault messages which are stored to permanent memory on the
engine ECM. These stored messages can be retrieved by the host controller controller and displayed on
the controller when a request is initiated by the user. The DM2 messages display the same type of
information as the DM1 messages.
The controller can support a maximum of 32 messages. When previously active DTC messages are
requested and received, the controller will display the stored messages on the controller front panel LCD
screen. If multiple stored messages are received the user can either manually scroll through each stored
message or the screen will scroll between each DTC stored message.
To Trigger a
DM2 Request,
simultaneously press the UP and DOWN keys for a period of 3 seconds in
either the AUTO, OFF, or RUNNING modes. The UP and DOWN keys can also be pressed to remove
the DM2 message screen.
If the controller is in the OFF or AUTO mode when the request is triggered, the ECM may not be
powered on, so the controller will energize the fuel relay output and wait for the ECM to power on. The
controller then sends out the DM2 request. In the event there is no response from the ECM, the
controller will re-attempt an additional 3 times. It will then display 'Requesting Fail' and turn off the fuel
output if there is no valid response on the fourth try. The default ECM address for DM2 request is 0 and
the ECM address can only be changed by using the PC Configurator. The controller may also show
'Reading Abort' if communication is unsuccessful. If the request was successful, the controller will show
'Read DTC Success' and start to display the messages.
