TERMINAL BLOCK SECTION 6217030 - Caterpillar

Illustration 1 g00894452
Schematic of the circuit of the fuel level sender
This diagnostic code is recorded when the ECM reads the signal voltage of the fuel level sender and the voltage is too low. The possible causes of this failure are listed here:
The sender has failed.
The signal circuit in the machine harness is shorted to ground.
The ECM has failed. This is unlikely. This failure causes the fuel gauge to always indicate an empty fuel tank or the fuel gauge may intermittently indicate an empty fuel tank. Test Step 1. CHECK THE SENDER.
Disconnect the machine harness from the sender. Expected Result:The diagnostic code changes from CID 0096 FMI 04 to CID 0096 FMI 03.Results:
OK - The diagnostic code changed from CID 0096 FMI 04 to CID 0096 FMI 03. This indicates that the failure is no longer present. The sender has failed. Repair: Replace the sender.STOP
NOT OK - The diagnostic code remains. The failure remains present. The sender is not causing the failure. Proceed to test step 2.Test Step 2. CHECK THE HARNESS.
The sender remains disconnected from the machine harness.
Turn the disconnect switch and the key start switch to the OFF position.
Disconnect the J1 and J2 machine harness connectors from the ECM.
At the machine harness connector for the sender, measure the resistance between the signal contact 1 (wire 447-PK(Pink)) and frame ground. Expected Result:The resistance is greater than 5000 ohms. Results:
OK - The resistance is greater than 5000 ohms. The harness circuit resistance is correct. The ECM may have failed. Repair: It is unlikely that the ECM has failed. Exit this procedure, and perform this procedure again. If the failure is not found, replace the ECM. See Troubleshooting, "Electronic Control Module (ECM) - Replace". STOP
NOT OK - The resistance is less than 5000 ohms. The machine harness has failed. There is a short between frame ground and the signal circuit in the machine harness. Repair: Repair the machine harness or replace the machine harness. STOP