UMAX090600 Version 1
Preliminary Documentation – May be Subject to Change
17-48
If the FMI used is anything other than one of those in Table 15, then both the low and
high faults will be assigned the same FMI. This condition should be avoided, as the log
will still useL different OC for the two types of faults, even though they will be reported
the same in the DTC. It is the user’s responsibility to make sure this does not happen.
Table 4: Low Fault FMI vs High Fault FMI
1.7.
DTC React Function Block
The DTC React function block is a very simple function which will allow a received DTC, sent from
another ECU on a DM1 message, to disable an output or be used as input to another type of logic
block. Up to five SPN/FMI combinations can be selected.
Figure 5: DTC React Function Block
Should a DM1 message be received with the SPN/FMI combination defined, the corresponding DTC
State will be set to ON. Once ON, if the same SPN/FMI combination has not been received again
after 3 seconds, the DTC State will be reset to OFF.
The DTC could be used as a digital input for any function block as appropriate.
