DIAGNOSTIC MANUAL
Actions:
1.
After DOC reaches operating temperature and stabilizes (see callout 2, graph 8), verify DOCOT
and DPFOT signal values are greater than 900°F (482°C). In this graph, DOCOT and DPFOT
are less than 900°F (482°C).
2.
Verify Diesel Oxidation Catalyst Inlet Temperature (DOCIT) signal value is between 550°F (287°C)
to 800°F (427°C).
NOTE – It is normal to see Diesel Oxidation Catalyst Inlet Temperature DOCIT, DOCOT, and DPFOT signal
values to fluctuate at the beginning and end of the OBFCT.
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