CHANNEL AS 3574884 - Caterpillar

Illustration 1 g00730074
Schematic of the Fuel Level SensorThis diagnostic code is recorded when the VIMS reads the voltage of the fuel level sensor and the voltage above normal. The sensor sends a PWM signal to the VIMS module. The possible causes of this diagnostic code are listed here:
A shorted harness
An open supply circuit to the sensor
A failed sensor
An open circuit
The ECM may have failed. This is unlikely.Note: Ensure that the diagnostic code is still active.Note: The following procedure can create numerous related diagnostic codes. Reconnect all harnesses. Then, the related diagnostic codes will be shown as being NOT active. Complete the following procedure. Then, clear all of the related diagnostic codes.
CHECK THE SUPPLY VOLTAGE AT THE SENSOR.
Turn the disconnect switch and the key start switch to the ON position.
Check the voltage at the machine harness connector of the sensor from +battery contact to the ground contact. Do NOT disconnect the sensor. Use the 7X-1710 Cable probes to measure the voltage. Expected Results: The voltage should measure approximately 24 DCV.Results:
OK - Voltage is approximately 24 DCV. The voltage is correct. Proceed to 3.
NOT OK - Voltage is not approximately 24 DCV. There is an open in the machine harness or the ECM has failed. It is unlikely that the ECM has failed. Proceed to 2.
CHECK FOR AN OPEN IN THE SUPPLY CIRCUIT.
The key start switch and the disconnect switch remain in the ON position.
Disconnect the sensor from the machine harness.
At the machine harness connector for the sensor, measure the voltage from the +Battery contact to frame ground.Expected Results: The voltage should measure approximately 24 DCV. Results:
OK - Voltage measures approximately 24 DCV. The return circuit is open. Repair the machine harness or replace the machine harness.
NOT OK - Voltage does not measure approximately 24 DCV. The supply circuit is open. Repair the machine harness or replace the machine harness.
CHECK THE SIGNAL CIRCUIT.
Turn the disconnect switch and the key start switch to the ON position.
Disconnect the machine harness connector from the sensor.
At the machine harness connector for the sensor, measure the voltage between signal contact and the ground contact. Expected Results: The voltage should measure approximately 5 DCV.
OK - Voltage is approximately 5 DCV. The voltage is correct. Replace the sensor. STOP
NOT OK - Voltage is not approximately 5 DCV. The voltage is not correct. Proceed to 4.
CHECK FOR AN OPEN SIGNAL CIRCUIT.
Turn the key start switch and the disconnect switch to the OFF position.
The sensor remains disconnected from the machine harness.
Disconnect the machine harness from the interface module.
Place a jumper between signal contact and the ground contact of the machine harness connector for the sensor.
At the machine harness connector of the interface module, measure the resistance between the signal contact and frame ground. Expected Result: The resistance measures less than 10 ohms.Results:
OK - Resistance measures less than 10 ohms. The circuit is correct. Proceed to 5.
NOT OK - Resistance is greater than 5000 ohm. The circuit is open. Repair the machine harness or replace the machine harness.
CHECK THE SIGNAL WIRE