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SmartVue Operator’s Manual
68
10-0004-R13
10.7.2 Viewing Active DTCs
DTCs can be viewed using the
Active DTC Monitor screen (J1939 – Menu >
Diagnostics Display).
There are two sets of four lamps: MIL, STOP, WARNING, and PROTECT. Depending
on the trouble code, one or more of these lamps will light up or flash to indicate the
severity of the problem. A rapid flash (about 1 Hz) indicates a problem with a greater
severity than if it were flashing slowly (about 2 Hz), and a slow flash has a higher
severity than no flash (but illuminated).
There are two portions to the screen. The upper portion of the screen shows the combined
lamp states for all the DTC messages from the indicated ECU. Thus, if one DTC were to
cause the Malfunction Indicator lamp to be illuminated and another DTC to cause the
Warning lamp to be illuminated, they will both be illuminated simultaneously.
Figure 10-7 The Active DTC Monitor screen
On the lower portion of the screen, you can page though each DTC for the selected ECU
by using the arrow buttons. The lower lamps will indicate the severity for the single
DTC only. In this case, different DTC may illuminate the lamps differently.
You can cycle through the list of selected devices using the arrow buttons to examine the
combined lamp states.
Table 10-1 Status lamps and their meanings
MIL (Malfunction Indicator Lamp)
This lamp is used to relay trouble code information related
exclusively to emissions-related issues. It will illuminate
only when there is an active emissions-related DTC.
Red Stop Lamp
Trouble code information that is of a severe enough
condition that stopping the vehicle is warranted will cause
this lamp to illuminate.
Amber Warning Lamp
A DTC for a problem with the vehicle system where the
vehicle does not need to be immediately stopped will cause
this lamp to illuminate.
Protect Lamp
This lamp is used to relay trouble code information for a
problem that is probably not electronic subsystem related.