Navistar MaxxForce DT Diagnostic Manual page 65

Actions:
1. After Diesel Oxidation Catalyst (DOC) reaches operating temperature and stabilizes, verify Diesel
Particulate Filter Inlet Temperature (DPFIT) signal value is at approximate target temperature for
current soot load level (See Soot Load Level vs. Exhaust Gas Target Temperature Chart, page 62).
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 DOCIT, DPFIT, and DPFOT signal values fluctuate at the beginning and end
of the OBFCT.
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DIAGNOSTIC MANUAL
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