ROTOR 3D9989 - Caterpillar

Illustration 1 g01419349
Connections of the auxiliary lever #2 position sensorThis diagnostic code is associated with the auxiliary lever #2 position sensor. The FMI 03 means that the ECM has determined that the signal voltage of the PWM sensor is above normal.The possible causes of this diagnostic code are listed:
The power supply circuit for the sensor is open.
The return circuit is open.
The signal circuit is open or the sensor is disconnected.
The signal circuit is shorted to the sensor power supply.
The sensor has failed.
The ECM has failed. This is unlikely. Before performing this procedure, inspect the harness connectors that are involved in the circuit. Poor connections can often be the cause of a problem in an electrical circuit. Verify that all of the circuit connections are clean. Verify that all of the circuit connections are secure. Verify that all of the circuit connections are in good condition. If a problem with a connection is found, correct the problem and verify that this diagnostic code is active before performing this procedure.Note: Ensure that CID 2205 FMI 03 is active before performing this procedure.Note: The following test procedure may create other diagnostic codes. Ignore these created diagnostic codes and clear the diagnostic codes when the problem has been corrected.Test Step 1. CHECK THE VOLTAGE AT THE SENSOR
The disconnect switch and the key start switch remain in the ON position.
Disconnect the sensor from the machine harness.
At the machine harness connector for the sensor, measure the voltage between contact 1 (wire 709-OR) and contact 2 (wire J764-BR).Expected Result:The voltage measurement is 10 0.5 DCV.Results:
OK - The voltage measurement is 10 0.5 DCV. Proceed to Test Step 2.
NOT OK - The voltage measurement is not 10 0.5 DCV. Repair: There may be an open in the machine harness. Check the fuse for this circuit. Ensure that the fuse is not open. If the fuse is open, replace the fuse. Clear all diagnostic codes. Verify if the diagnostic code is still active.If the code remains active, there is an open in the supply circuit of the solenoid on the machine harness. Repair the machine harness or replace the machine harness.STOPTest Step 2. CHECK FOR AN OPEN IN THE SIGNAL CIRCUIT
The key start switch and the disconnect switch remain in the ON position.
At the machine harness connector for the sensor, measure the voltage from signal contact 3 (wire J948-PK) to ground contact 2 (wire J764-BR).Expected Result:If the signal circuit and the return circuit for the sensor is correct, the pull-up voltage for the ECM should be indicated on the voltage measurement. The value of this voltage can vary. The presence of a voltage will indicate that the signal circuit is NOT open. The absence of a voltage indicates an open in the signal circuit.Results:
OK - The pull-up voltage is present when the measurement is performed. The signal circuit and the return circuit are correct. Proceed to Test Step 4.
NOT OK - No voltage or little voltage is measured. There is an open or a bad