D 250 Pickup L6-359 5.9L DSL (1992)
Water-In-Fuel Sensor: Description and Operation
Water-In-Fuel Sensor
LOCATION
The Water-In-Fuel (WIF) sensor is located at the bottom of the fuel/water separator filter.
OPERATION
When water is sensed in the fuel, this sensor sends an input signal to the electronic controller and the electronic controller in turn illuminates the
Water-In-Fuel lamp on the instrument panel.
The electronic controller looks at the Water-In-Fuel sensors signal under the following conditions:
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When the key is rotated to the RUN position.
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At the conclusion of the intake air heater post-heat cycle.
