PIN-TRACK LINK 6Y2146 - Caterpillar

Illustration 1 g03372582
Schematic of the "Loader Bucket Inclinometer Sensor" (CID 3700)
This diagnostic code is associated with the Loader Bucket Inclinometer sensor. The FMI 04 means that the ECM has determined that the voltage of the circuit for the position sensor is below normal. The possible causes of this diagnostic code are listed below:
The signal circuit for the sensor is shorted to ground.
The sensor has failed.
The Machine ECM has failed. ECM failure is unlikely.Note: Poor connections can often be the cause of a problem in an electrical circuit. Before performing this procedure, inspect the harness connectors that are involved in the circuit. Verify that all of the connections in the circuit are clean and that all connections are secure. If a problem with a connection is found, correct the problem and verify that this diagnostic code is active before performing this procedure. Each connector contact should withstand 45 N (10 lb) of pull. Each wire should remain in the connector body. This test checks whether the wire was properly crimped in the contact and whether the contact was properly inserted into the connector.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 3700 FMI 04 is active before performing this procedure.Note: Use a digital multimeter for the measurements in this procedure.System Response:The implements will stop working until the right-hand joystick is returned to the center position. After the joystick has been centered, the implements will behave normally, but the Self Level, Return-to-Dig, and Work Tool Positioner features will be disabled. The green Self Level icon on the machine left-hand display will no longer light up when the Self Level Cab switch is turned on. In the case of an intermittent fault, these features will be disabled until the next key cycle.Test Step 1. CHECK THE SENSOR
Turn the disconnect switch and the key start switch to the ON position.
Ensure that the diagnostic code is active.
Observe the status of the diagnostic code. Disconnect the sensor from the machine harness. Expected Result:The FMI 04 changes to an FMI 03.Results:
OK - The FMI 04 changes to an FMI 03. The sensor has failed.Repair: Replace the sensor.STOP
NOT OK - The FMI 04 code remains active. Proceed to test step 2.Test Step 2. CHECK THE WIRING HARNESS OF THE SENSOR FOR A SHORT TO GROUND
Turn the key start switch and the disconnect switch to the OFF position.
Disconnect the machine harness from the sensor.
Disconnect the machine harness connector from the ECM.
At the machine harness connector for the ECM, measure the resistance from the signal contact J1-35 (wire A426-BU(Blue)) of the machine harness to all possible sources of ground. Measure the resistance to all contacts of the machine harness connectors for the Machine ECM. Expected Result:Each resistance measurement is greater than 5000 ohms.Results:
OK - Each resistance measurement is greater than 5000 ohms. The machine harness is correct. Proceed to Test Step 3.
NOT OK