LINK AS-TRACK 4991480 - Caterpillar

Illustration 1 g01411093
Connections of the position sensor for releasing the winchThis diagnostic code is associated with the position sensor for releasing the winch. The FMI 08 means that the ECM has determined that the signal frequency or the signal pulse width is not within the expected range. The sensor is a PWM sensor that operates at a frequency of approximately 500 Hz. The sensor has an operating duty cycle of 5% to 95%.The possible causes of this diagnostic code are listed below:
The sensor has failed.
Intermittent connections or poor connections
Mechanical devices are loose.
The ECM has failed. This condition 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 connections in the circuit are clean and secure. If a problem with a connection is found, correct the problem and verify that this diagnostic code 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 original diagnostic code has been corrected. Ensure that the diagnostic code of CID 1882 FMI 08 is active before performing this procedure.Note: Use a digital multimeter for the measurements in this procedure. Test Step 1. CHECK FOR POWER AT THE SENSOR.
Do not disconnect the harness connector from the sensor.
At the back of the harness connector for the sensor, insert a multimeter probe along contact 1 (wire 176-OR) for the voltage supply.
At the back of the harness connector for the sensor, insert a multimeter probe along contact 2 (wire 210-BK) for the ground.
Turn the key start switch and the disconnect switch to the ON position.
Measure the voltage from contact 1 (wire 176-OR) to contact 2 (wire 210-BK).Expected Result:The voltage is 10 0.5 DCV.Results:
OK - The voltage is 10 0.5 DCV. Proceed to Test Step 3.
NOT OK - The voltage is not 10 0.5 DCV. The circuit is open. Repair: Repair the machine harness or replace the machine harness.STOPTest Step 2. CHECK THE SIGNAL CIRCUIT OF THE SENSOR.
Turn the key start switch and the disconnect switch to the OFF position.
At the back of the harness connector for the sensor, remove the multimeter probe from contact 1 (wire 176-OR) and insert the probe along contact 5 (wire J948-PK).
The other multimeter probe remains at the ground wire contact 2 (wire 210-BK).
Turn the disconnect switch and the key start switch to the ON position.
Monitor the signal of the sensor with the multimeter.
Without disconnecting the sensor or the hardware that is associated with the sensor from the machine, take the sensor through the full operating range of the sensor.Expected Result:The sensor signal responds in the manner that is described at the beginning of this procedure.Results:
OK - The sensor signal responds correctly. The sensor is operating correctly. Proceed to Test Step 3.
NOT OK - The sensor signal does not respond correctly. The sensor has failed.Repair: Replace the joystick. Calibrate the