3-6 DGC-2020 Functional Description 9400200990 Rev I
ECU Parameter
Metric
Units
English
Units
Update Rate
Decimal
Place
∗
SPN
Total fuel used liters gallons requested 1.5 s none 250
Trip fuel liters gallons requested 1.5 s none 182
∗ SPN is suspect parameter number.
Table 3-2. Engine Configuration Parameters Obtained from CAN Interface
ECU Parameter
Metric
Units
English
Units
Update
Rate
Decimal
Place
∗
SPN
Engine speed at high idle point 6 rpm rpm 5 s none 532
Engine speed at idle point 1 rpm rpm 5 s none 188
Engine speed at point 2 rpm rpm 5 s none 528
Engine speed at point 3 rpm rpm 5 s none 529
Engine speed at point 4 rpm rpm 5 s none 530
Engine speed at point 5 rpm rpm 5 s none 531
Gain (Kp) of endspeed governor %/rpm %/rpm 5 s 100
th
545
Maximum momentary engine override
speed point 7
rpm rpm 5 s none 533
Maximum momentary engine override time
limit
seconds seconds 5 s 10
th
534
Percent torque at idle point 1 % % 5 s none 539
Percent torque at point 2 % % 5 s none 540
Percent torque at point 3 % % 5 s none 541
Percent torque at point 4 % % 5 s none 542
Percent torque at point 5 % % 5 s none 543
Reference engine torque
N•m
ft-lb 5 s none 544
Requested speed control range lower limit rpm rpm 5 s none 535
Requested speed control range upper limit rpm rpm 5 s none 536
Requested torque control range lower limit % % 5 s none 537
Requested torque control range upper limit % % 5 s none 538
∗ SPN is suspect parameter number.
Diagnostic Trouble Codes (DTCs)
The DGC-2020 obtains diagnostic engine information from a compatible engine control unit (ECU). The
DGC-2020 will receive an unsolicited message of a currently active diagnostic trouble code (DTC).
Previously active DTCs are available upon request. Active and previously active DTCs can be cleared on
request.
Table 3-3 lists the diagnostic information that the DG
C-2020 obtains over the CAN interface.
DTCs are reported in coded diagnostic information that includes the Suspect Parameter Number (SPN),
Failure Mode Identifier (FMI), and Occurrence Count (OC). All parameters have an SPN and are used to
display or identify the items for which diagnostics are being reported. The FMI defines the type of failure
detected in the subsystem identified by an SPN. The reported problem may not be an electrical failure but
a subsystem condition needing to be reported to an operator or technician. The OC contains the number
of times that a fault has gone from active to previously active.
CAUTION
When the CAN interface is enabled, the DGC-2020 will ignore the following
sender inputs: oil pressure, coolant temperature, and magnetic pickup.
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