Winco DGC-500 - Manual (Page 34)

DGC-500 Functional Description 3-14
NOTE
Always refer to the engine manual for the meaning of SPN and FMI combinations,
especially for proprietary DTC descriptions.
Figure 3-5. DTC
Screen Example
NOTE
If no ECU support is required, then parameters are updated within the DGC-500
only when “pulsing” the ECU and while the engine is running.
In the DTC screen example of Figure 3-5, the first DTC of five is displayed.
The SPN is 111 (coolant level), the FMI is 1 (low voltage from the sender,
thus we have low coolant level), and the OC is 2 (the engine has had a low
coolant level twice before). Refer to the engine manufacturer CAN interface
documentation for specific descriptions of codes.
After viewing the last DTC, screen 5 of 5, VIEWED ALL ACTIVE and USESELECT TO CLEAR will be
displayed. This also applies when viewing previous DTCs.
Clearing the active or previous DTCs, by pressing the Select/Enter pushbutton, will give one of four
responses.
1. A positive acknowledgment which causes ACTIVE DTC(S) HAVE BEEN ERASED to be displayed.
2. A negative acknowledgment which causes ERROR - NEGATIVE ACK and CANNOT ERASE DTC(S) to
be displayed.
3. A timeout for acknowledgment which causes ERROR - ACK TIME OUT and CANNOT ERASE DTC(S)
to be displayed. This occurs when approximately two seconds have elapsed with CAN working and no
positive or negative acknowledgment received.
4. A CAN communication failure causes ERROR - DISCONNECTED and CANNOT ERASE DTC(S) to be
displayed. This occurs when CAN is disconnected or the ECU is not functioning properly.
After viewing the response, the only way to back out of the screen is to press the Previous pushbutton. The
user is then taken back to the Alternate Display mode. Pressing the Display Toggle pushbutton will take the
user to the Menu mode screens. This also applies when viewing previous DTCs.
ECU Parameters Mode
When the optional J1939 communication is enabled, access to the ECU Parameters menu is available. This
menu displays parameters metered from the ECU. Only parameters related to genset applications are
metered from the ECU and displayed here. A submenu for viewing the engine configuration parameters is also
accessible from the ECU Parameters menu.
If a parameter is never sent after communication is established, or the ECU has sent information notifying the
DGC-500 that the parameter is not supported (non-applicable), then the parameter’s screen will be hidden
and skipped when scrolling from screen to screen in the ECU Parameters menu.
If a DTC is associated with one of the parameters, then the screens will function like the Pre-Alarm screens
of the Alternate mode display. When scrolling through the menu, the user is taken to the new DTC-related
screens first. The DTC-related screen will then blink while alternating between the parameter’s value and the
DTC information.
The following list includes all of the engine system monitoring parameters read from the ECU (if supported)
in the order in which they appear when pressing the Raise/Scroll pushbutton, having started from the ECU
Parameters menu.
1. Throttle position
2. Percent load at current rpm
3. Actual engine percent torque
4. Engine speed
5. Injection control pressure
6. Injector metering rail pressure
7. Total engine hours t
8. Trip fuel