User manual

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stored message at a 3 second interval. If the user intervenes, the interval will
change to 10s. The DTC stored message display appears as follows:
Figure 15 – 32 stored DTC messages, the 5PthP stored code being displayed
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 not be powered on, so the controller will energize the fuel relay output
and wait for the ECM to power on. The GSC400 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 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 ABORT..." if communication is unsuccessful. If the request was
successful, the GSC400 will show "READ DTC SUCCESS" and start to display
the messages.
4.12.3 DM1 Event Log:
The GSC400 Event Log (see section 4.8.3 on page 91) 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 displayed first.