(Table 238, contd)
Troubleshooting Test Steps
Values Results
4. Check that the Diagnostic Code is Still Active
A. Turn the keyswitch to the OFF position.
B. Connect the electronic service tool to the diagnostic
connector.
C. Turn the keyswitch to the ON position. Wait for at least 1
minute.
D. Monitor the active diagnostic code screen on the electronic
service tool. Check and record any active diagnostic codes.
Diagnostic code Result: A 97-3 (3547-3) diagnostic code is active.
Proceed to Test Step 5.
Result: A 97-15 (E232 (1)) diagnostic code is active.
Proceed to Test Step 7.
Result: No diagnostic code is active.
Return the unit to service.
5. Create a Short Circuit at the Sensor Connector
A.Turn the keyswitch to the OFF position.
B. Disconnect the WIF sensor from the harness.
C. Fabricate a jumper wire that is 150 mm (6 inch) long.
D. Use the jumper to connect the sensor signal terminal to the
sensor return terminal on the harness connector for the WIF
sensor.
E. Turn the keyswitch to the ON position. Wait for at least 1
minute.
F. Monitor the active diagnostic code screen on the electronic
service tool. Check and record any active diagnostic codes.
Open circuit Result: A 97-3 (3547-3) diagnostic code was active be-
fore installing the jumper. A 97-15 (E232 (1)) code was
active with the jumper installed. There is an open circuit
in the WIF sensor.
Repair: Install a replacement sensor. Refer to Disas-
sembly and Assembly, “Water Separator and Fuel Filter
(Primary) - Remove and Install” for the correct
procedure.
Use the electronic service tool to clear all logged diag-
nostic codes and verify that the repair eliminates the
fault.
Result: There is still an active 97-3 (3547-3) diagnostic
code with the jumper installed. The sensor is OK.
Proceed to Test Step 6.
6. Check the Harness for an Open Circuit
A. Turn the keyswitch to the OFF position.
B. Disconnect the connector for the water-in-fuel sensor and
P1 connector.
C. Use a multimeter to check the resistance of the sensor sig-
nal wiring between the sensor connector and the P1
connector.
Note: Refer to the Electrical Schematic for the application for
the correct terminals.
D. Install the removed connectors.
Less than 2 Ohms. Result: The measured resistances are greater than 2
Ohms. There is an open circuit in the harness.
Repair: Repair the sensor connector or replace the
harness.
Use the electronic service tool to clear all logged diag-
nostic codes and verify that the repair eliminates the
fault.
Result: The measured resistance is less than 2 Ohms.
There may be a short circuit in the harness.
Proceed to Test Step 7.
(continued)
452 UENR4469-36
Circuit Tests
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
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