Navistar International DT 466 Diagnostic/Troubleshooting Manual page 554

550 7 ELECTRONIC CONTROL SYSTEMS DIAGNOSTICS
WIF Sensor (Water in Fuel)
Figure 511 Function diagram for the WIF system
The function diagram for the WIF system includes the
following:
• Electronic Control Module (ECM)
• Fuel filter assembly
• FUEL FILTER lamp (amber)
The Electronic Control Module (ECM) monitors the
fuel filter header and alerts the operator when water
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
is present in the fuel supply. When water is detected,
the ECM will set a Diagnostic Trouble Code (DTC) and
the amber FUEL FILTER lamp will illuminate.
The WIF system includes the ECM and the fuel filter
assembly with a WIF sensor. The WIF sensor is used
in the fuel filter assembly.
EGES-270-1
Follow all warnings, cautions, and notes.
© August 2008 Navistar, Inc.