Table 94
Troubleshooting Test Steps
Values Results
1. Drain the Fuel/Water Separator Bowl
A. Turn the ignition key to the OFF position.
B. Drain the fuel/water separator bowl. Refer to the Operation and
Maintenance Manual, “Fuel System Primary Filter/Water Separa-
tor - Drain”.
C. If necessary, prime the fuel system. Refer to the Operation and
Maintenance Manual, “Fuel System - Prime”.
D. Turn the ignition key to the ON position. Do not start the engine.
Wait for 1 minute.
Fuel/water
separator
Result: The “Water-In-Fuel” warning disappears within 1
minute.
Proceed to Test Step 2.
Result: The “Water-In-Fuel” warning remains on.
Proceed to Test Step 3.
2. Confirm that there is no Water in the Fuel
A. Run the engine for 5 minutes.
Water in fuel Result: The “Water-In-Fuel” warning does not reappear
within the 5 minutes.
Return the unit to service.
Result: The “Water-In-Fuel” warning reappears within the 5
minutes.
Repair: The fuel supply is contaminated with water. Drain
the fuel tank and then fill the fuel tank with clean fuel.
Repeat the procedure from Test Step 1.
If the fault is still present, contact the Dealer Solutions Net-
work (DSN).
3. Water-In-Fuel Switch
A. Check the operation of the Water-In-Fuel switch. Refer to Trou-
bleshooting, “Water In Fuel - Test”.
Water in fuel
switch
Result: The Water-In-Fuel switch circuit required a repair.
Repeat the procedure from Test Step 1.
Result The Water-In-Fuel switch is OK.
Repair: The fuel supply is contaminated with water. Drain
the fuel tank and then fill the fuel tank with clean fuel.
Repeat the procedure from Test Step 1.
If the fault is still present, contact the Dealer Solutions Net-
work (DSN).
i08473851
Fuel Rail Pressure Problem
Use this procedure to troubleshoot abnormal fuel rail
pressure or use this procedure if any of the following
diagnostic trouble codes are active. Refer to
Troubleshooting, “Diagnostic Trouble Codes” for
information about the codes.
UENR4469-36 191
Symptom Troubleshooting
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