i07907488
Water in Fuel - Test
For a 97-15 or 97-16 code, refer to Troubleshooting,
“Fuel Contains Water” before returning to this
procedure.
Use this procedure when the water-in-fuel sensor is
suspect. This procedure also covers the following
diagnostic code:
Table 237
Diagnostic Trouble Code for the Water-in-Fuel Sensor
J1939 Code PDL code Code Description
(code descriptions may vary
Comments
97-3 3547-3 Water In Fuel Indicator : Voltage Above
Normal
The ECM detects the following conditions:
An open circuit in the Water-In-Fuel (WIF) sensor circuit.
The ECM has been powered for less than 5 seconds.
The warning lamp will stay on when the “indicator lamp self check”
has been completed. The ECM will disable the function to detect water
in fuel while the code is active.
Water-in-Fuel Sensor Operation
The WIF sensor is a normally open sensor. During
normal operation, there will be no signal sent from
the WIF sensor to the ECM. If water is detected in the
fuel, the sensor will send a signal to the ECM. If the
signal remains constant for 45 seconds, a 97-15
(E232-1) diagnostic code will become active. If the
signal remains constant for 1 hour, a 97-16 (E232-2)
diagnostic code will become active. These diagnostic
codes can also be caused by a short in the WIF
sensor circuit.
Water-in-Fuel Sensor Self Check
When the ignition keyswitch is turned to the ON
position, the switch in the WIF sensor will close for 5
seconds. If the ECM does not detect a signal from
the WIF sensor during this period, a 97–3 (3547-3)
diagnostic code will become active.
450 UENR4469-36
Circuit Tests
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