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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 controller’s
alarm will sound and the controller will send a request to the ECM. A LAMP test will
additionally be triggered in the OFF mode. The “UP” and “DOWN” keys can also be
pressed to remove the DM2 message screen.
If the GSC400 is in the OFF or AUTO mode when the request is triggered, the ECM may
ot be powered on, so the controller will energize the fuel relay output and wait for the
400 then sends out the DM2 request. In the event there is no
sponse from the ECM, the controller will re-attempt sending out the DM2 request an
T..." if
ommunication is unsuccessful. If the request was successful, the GSC400 will show
READ DTC SUCCESS" and start to display the messages.
n
ECM to power on. The GSC
re
additional 3 times every 1.25 seconds. 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 from the
GSC400 PC interface. The GSC400 may also show "READING ABOR
c
"
5.13.3
DM1 Event Log:
The GSC400 Event Log (see section 5.9.3 on page 31) 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. All entries in the log are
stored in a reverse chronological order with the most recent event display first.
Summary of Contents for GSC400 Series
Page 15: ...Figure 4 General GSC400 System Wiring Diagram ...
Page 16: ...Figure 5 Digital IO Example ...
Page 105: ...105 of 105 ...