VALVE AS-RELIEF 3453516 - Caterpillar

Illustration 1 g01440175
Schematic for the "Lift Linkage" position sensor
This diagnostic code is associated with the "Lift Linkage" position sensor. The FMI 00 diagnostic code means that the ECM has determined that the signal of the sensor is above the normal range.The output frequency of the position sensor is approximately 500 hertz. The duty cycle of the signal changes as the position sensor moves. The possible causes of this diagnostic code are listed below:
The sensor needs to be recalibrated.
The ECM has failed. This is unlikely.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 0350 FMI 00 is active before performing this procedure.Note: Use the 146-4080 Digital Multimeter for the measurements in this procedure. System Response:The diagnostic code will be logged into the internal memory of the ECM.Test Step 1. CHECK THE ADJUSTMENT AND/OR THE CALIBRATION OF THE SENSOR.
Turn the disconnect switch and the key start switch to the ON position.
Perform the adjustment procedure for the position sensor, if necessary. Then perform the calibration of the position sensor. Refer to the Testing and Adjusting section of the manual for additional information on these procedures.
Without disconnecting the sensor or the hardware that is associated with the sensor, move the sensor through the entire range of motion. Note: On some machines, it may be necessary to start the engine in order to move the sensor through the entire range of motion.
Check the status of the diagnostic code. Expected Result:The CID 0350 FMI 00 diagnostic code is not active.Results:
OK - The diagnostic is not active. The adjustment and/or the calibration has corrected the failure. Resume normal operation.STOP
NOT OK - The diagnostic code CID 0350 FMI 00 is still active. Repair: Exit this procedure. Perform this procedure again. Proceed to Test Step 2.Test Step 2. CHECK IF THE DIAGNOSTIC CODE REMAINS
Inspect the harness connectors and clean the contacts of the machine harness connectors.
Reconnect all harness connectors.
Turn the disconnect switch and the key start switch to the ON position.
Operate the machine and take the sensor through the operating range of the sensor.
Check the status of the CID 0350 FMI 00 diagnostic code. Expected Result:The CID 0350 FMI 00 diagnostic code is not active at the maximum range of the sensor.Results:
OK - The CID 0350 FMI 00 diagnostic code is not active at the maximum range of the sensor. The diagnostic code does not exist at this time. The initial diagnostic code was probably caused by a poor connection or a short at one of the connectors that was disconnected and reconnected. Resume normal operation.STOP
NOT OK - The CID 0350 FMI 00 diagnostic code is active at the maximum range of the sensor. The diagnostic code has not been corrected. The ECM may have failed.Repair: It is unlikely that the ECM has failed. Exit this procedure. Perform the adjustment procedure for the sensor, if necessary. Then perform the calibration procedure