FILTER AS-FUMES DISPOSAL 3573342 - Caterpillar

Illustration 1 g02149993
Connections of the ripper control handle position sensor
This diagnostic code is associated with the ripper raise/lower sensor. The FMI 03 diagnostic code means the input signal from the sensor and the signal voltage is above the acceptable range.The sensor provides an input signal to the ECM that indicates the position of the ripper control handle. The signal receives power from the battery. The position sensor sends a PWM input signal to the Implement ECM. The duty cycle of the signal varies from approximately 90 percent at the full forward position to approximately 10 percent at the full rearward position. When the blade control handle is at the center position, the duty cycle will be approximately 50 percent.The possible causes of this diagnostic code are listed:
The power supply circuit is open.
The fuse has blown.
The return circuit is open.
The signal circuit is open.
The signal circuit is shorted to another voltage source.
The sensor has failed.
The ECM has failed. An ECM failure is unlikely.Note: The following test procedure may create other diagnostic codes. Ignore these created diagnostic codes and clear these diagnostic codes when the original diagnostic code has been corrected. Ensure that the diagnostic code of CID 0880 - FMI 03 is active before performing this procedure.Note: Use a digital multimeter for the measurements in this procedure.Test Step 1. Check the power supply circuit to the sensor
Turn the disconnect switch and the key start switch to the ON position. Do not start the engine.
At the machine harness connector for the sensor, insert a multimeter probe along contact "1" wire (176-OR(Orange)) and along contact "2" wire (210-BK(Black)). Do not disconnect the machine harness connector from the sensor.
Measure the voltage. Expected Result:The voltage measurement is between 23.5 VDC and 24.5 VDC.Results:
YES - The voltage measurement is between 23.5 VDC and 24.5 VDC. The power circuits for the sensor are correct. Proceed to Test Step 2.
NO - The voltage measurement is less than 23.5 VDC. The power supply for the sensor is not correct.Repair: There is an open circuit or a bad connection in the machine harness. Verify that the fuse is in good condition and is not blown. Wire (176-OR(Orange)) may have an open circuit. Refer to Electrical System Schematic, KENR8916. Examine all of the connectors that are in the circuit. Ensure that the connections are clean and secure. Repair the machine harness or replace the machine harness.STOPTest Step 2. Check for an open in the sensor circuit
Turn the key start switch and the disconnect switch to the OFF position.
Disconnect the connector from the sensor. At the harness connector for the sensor, place a jumper wire between contact "2" wire (210-BK(Black)) and the contact "3" wire (E414-PU(Purple)).
Disconnect the J1 and J2 machine harness connectors from the ECM.
At the machine harness connectors for the ECM, measure the resistance between contact J1-13 wire (210-BK(Black)) and contact J2-27 wire (E414-PU(Purple)). Expected Result:The resistance measurement is less than 5 ohms.Results:
YES - The resistance measurement is less than 5 ohms. The circuit is correct. Proceed to Test