SHROUD AS-FAN 1296231 - Caterpillar

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The "Fuel Level" sensor is located on the side of the fuel tank. The sensor is next to the main hydraulic pump and the manifold for the main hydraulic pump.
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Schematic of the Fuel Level Sensor
This diagnostic code is associated with the Fuel Level Sensor. The FMI 04 diagnostic code means that the Machine ECM has determined that the voltage of the circuit for the position sensor is below normal. The possible causes of this diagnostic code are listed below:
The signal circuit for the sensor is shorted to ground.
The sensor has failed.
The Machine ECM has failed. A failure of the Machine ECM is unlikely. Note: The switch panel communicates with the Machine ECM through the CAN data link. Observe that the CID 0246 FMI 12 diagnostic code is not active prior to starting this procedure. When CID 0246 FMI 12 is active correct the diagnostic code prior to the start of this procedure.Note: The following test procedure may create other diagnostic codes. Ignore these created diagnostic codes and clear the diagnostic codes when the original diagnostic code has been corrected. Ensure that the diagnostic code of CID 0096 FMI 04 is active before performing this procedure. Note: Use the 146-4080 Digital Multimeter for the measurements in this procedure.Test Step 1. CHECK THE SENSOR
Turn the disconnect switch and the key start switch to the ON position.
Ensure that the diagnostic code is active.
Observe the status of the diagnostic code. Disconnect the sensor from the machine harness. Expected Result:The CID 0096 FMI 04 diagnostic code remains active. Results:
OK - The diagnostic code remains active. The sensor is correct. Proceed to Test Step 2.
NOT OK - The diagnostic code is no longer active. The sensor has failed.Repair: Replace the sensor.STOPTest Step 2. CHECK THE WIRING HARNESS OF THE SENSOR FOR A SHORT TO GROUND.
Turn the key start switch and the disconnect switch to the OFF position.
Disconnect the machine harness from the sensor.
Disconnect the machine harness connectors from the monitor.
At the machine harness connector for the monitor, measure the resistance from the signal contact 1 (wire 495-GN(Green)) of the machine harness to all possible sources of ground. Measure the resistance to all contacts of the machine harness connectors for the monitor. Expected Result:Each resistance measurement is greater than 5000 ohms.Results:
OK - Each resistance measurement is greater than 5000 ohms. The machine harness is correct. Proceed to Test Step 3.
NOT OK - One or more resistance measurements are not correct. There is a short in the machine harness.Repair: The short is between signal contact 1 (wire 495-GN(Green)) and the circuit with the low resistance measurement. Repair the machine harness or replace the machine harness.STOPTest Step 3. CHECK IF THE DIAGNOSTIC CODE REMAINS.
Inspect the contacts of the harness connectors. Clean the contacts of the harness connectors.
Reconnect all harness connectors.
Turn the disconnect switch and the key start switch to the ON position.
Operate the machine.
Check the status of the CID 0096 FMI 04 diagnostic code. Expected Result:The CID 0096 FMI 04 diagnostic code is