The sensor circuit of the presence of water in the fuel voltage below normal or short circuit on the low voltage circuit.
Water in fuel sensor cummins isx.
Recirculated exhaust gas temperature sensor not shown 11.
Egr connection tube 10.
The electronic control module ecm provides a 5 volt reference signal to the water in fuel sensor.
Ecm cooling plate 2.
The ecm determines that the voltage in the sensor signal circuit is less than 0 05 v dc for 1 second.
It was obvious that the coolant system was operating normally leading to the first.
Gauges really helped me out with this one.
Intake manifold pressure sensor 7.
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The water in fuel sensor is used to indicate high water accumulation in the fuel filter.
Fuel lift pump 9.
Egr differential pressure sensor mounting location 8.
For cummins isx fault codes on later models 2003 up use isx fault codes 2003 later go to all cummins fault codes leave isx fault codes and return to home page.
Which means even with condensation from cold fuel pumped in to a hot tank it would separate and slowly fall to the bottom of the tank especially as the movement of diesel would wash it off the sides as the vehicle moves.
I found out some interesting information about this code involving the fuel water separator.
First time replacing one of these gear pumps in a very long time.
Intake manifold air temperature sensor 5.
The wiring for both the coolant sensor and fuel water sensor namely the ground is shared.
The water in fuel sensor is attached to the fuel filter.
When the code for the water in fuel sensor popped up it also triggered an engine coolant temperature code to flash as well.
The oem supplied fuel filter is located on the intake side of the engine.
428 water in fuel wif sensor circuit 429 water in fuel wif sensor circuit 431 idle validation switch choice.
Water is heavier than diesel so in a practical sense you should suffer problems prior to the 50 or 60 gals left in the tank.
The water in fuel sensor is integrated into the bottom of the oem supplied suction fuel filter.
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When the water collected in the fuel filter covers the sensor probes the water in fuel sensor pulls the 5 volt reference voltage to ground indicating high water accumulation in the fuel.
Optional water in fuel sensor alerts the driver to contamination that could cause performance and durability problems.