GAUGE 2G8514 - Caterpillar

Water-in-Fuel Sensor OperationThe 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.
Table 2
Troubleshooting Test Steps Values Results
1. Inspect Electrical Connectors and Wiring
A. Turn the keyswitch to the OFF position.
B. Thoroughly inspect the connector for the WIF sensor and the P1/J1 ECM connector. Refer to Troubleshooting, "Electrical Connectors - Inspect".
C. Perform a 45 N (10 lb) pull test on each of the wires that are associated with the WIF sensor.
D. Check the screw for the ECM connector for the correct torque of 6 N m (53 lb in).
E. Check the harness for abrasions, for pinch points, and for corrosion.
Loose connection or damaged wire
Result: There is a fault in a connector or the wiring.
Repair: Repair any faulty connectors or replace the wiring harness. Ensure that all the seals are properly in place and ensure that the connectors are correctly coupled.
Use the electronic service tool to clear all logged diagnostic codes and verify that the repair eliminates the fault.
Result: All connectors, pins, and sockets are correctly coupled and/or inserted. The harness is free of corrosion, abrasion, and pinch points.
Proceed to Test Step 2.
2. Check For Active Diagnostic Codes
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. If the engine will start, then run the engine.
D. Wait for at least 1 minute.
E. Monitor the active diagnostic code screen on the electronic service tool. Check and record any active diagnostic codes.
Diagnostic codes
Result: There are no active diagnostic codes for the WIF sensor.
There may be an intermittent fault.
Repair: Refer to Troubleshooting, "Electrical Connectors - Inspect" to identify intermittent faults.
Result: A 97-15 (E232 (1)) or 97-16 (E232 (2)) diagnostic code is active.
Refer to Troubleshooting, "Fuel Contains Water" before continuing with this procedure.
Proceed to Test Step 3.
Result: A 97-3 (3547-3) diagnostic code is active.
Proceed to Test Step 3.
3. Check the Supply Voltage at the Sensor Connector
Note: Refer to the Electrical Schematic for the application to determine the sensor supply voltage.
A. Turn the keyswitch to the OFF position.
B. Disconnect the WIF sensor connector.
C. Turn the keyswitch to the ON position.
D. Measure the voltage between the sensor supply and sensor return terminals on the harness connector for the WIF sensor.
E. Turn the keyswitch to the OFF position.
Between 11 VDC and 13 VDC for a 12 VDC system.
Between 22 VDC and 26 VDC for a 24 VDC system.
Between 7.5 VDC and 8.5 VDC for an 8 VDC supply
Result: The voltage is not within the expected range. The fault is in the sensor supply wire or the return