HOSE 3587578 - Caterpillar

Illustration 1 g01248879
Winch Control Handle Position Sensor connectionsThis diagnostic code is associated with the winch control handle position sensor. The FMI 03 means that the ECM has determined that the voltage of the PWM signal is above normal.The possible causes of this diagnostic code are listed:
The sensor power supply circuit 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. Note: Ensure that CID 2267 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 problem has been corrected.Test Step 1. CHECK THE VOLTAGE AT THE SENSOR
Turn the disconnect switch and the key start switch to 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 G939-PK).Expected Result:The voltage measurement is 10 0.5 DCV.Results:
OK - The voltage measurement is 10 0.5 DCV. Proceed to Test Step 3.
NOT OK - The voltage measurement is not 10 0.5 DCV. Repair: There may be an open in the machine harness. Proceed to Test Step 2.Test Step 2. CHECK FOR AN OPEN IN THE SENSOR SUPPLY CIRCUIT
Turn the key start switch and the disconnect switch to the OFF position.
At the disconnected machine harness connector for the sensor, place a jumper wire from supply contact 1 to return contact 2.
Disconnect the machine harness connectors from the ECM. At the ECM machine harness connector J1, measure the resistance from contact J1-56 G939-PK and contact J1-69 (wire 709-OR).Expected Result:The resistance measurement is less than 5 ohms.Results:
OK - The resistance measurement is less than 5 ohms. The sensor supply circuit is not open. Proceed to Test Step 3.
NOT OK - The resistance measurement is greater than 5 ohms. There is an open or a bad connection in the sensor supply