Water In Fuel Sensor
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| 1 - Fuel Filter Housing |
DESCRIPTION
- The Water In Fuel (WIF) sensor is located in the fuel filter housing. The WIF sensor detects the presence of water in the fuel. If water is present in the fuel, a signal is sent to the Powertrain Control Module (PCM) and the PCM signals the instrument cluster, over the CAN bus, to illuminate the water in fuel warning. The WIF sensor is not a serviceable item.
Operation
- The non-dielectric properties of the water allow the sensors probes to close the electronic circuit when water is present in the system. When diesel fuel is present in the system, its dielectric (does not conduct electricity well) properties do not allow any electrical contact between the probes. A 12V power signal is always present in order to illuminate the indicator on the instrument cluster.