992K Wheel Loader Electrohydraulic System MID 082 - CID 2416 - FMI 04 Caterpillar


MID 082 - CID 2416 - FMI 04
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MID 082 CID 2416 FMI 04

Conditions Which Generate This Code:



Illustration 1g01965333
Schematic for the Right Implement Pump Pressure Sensor

This diagnostic code is associated with the Right Implement Pump Pressure Sensor. The FMI 04 means that the ECM has determined that the signal of the sensor is below the normal range.

The output frequency of the pressure sensor is approximately 500 hertz. The duty cycle of the signal changes as the pressure changes.

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 ECM has failed. This is unlikely.

Note: The following test procedure may create other diagnostic codes. Clear these diagnostic codes when the original diagnostic code has been corrected. Ensure that the diagnostic code of CID 2416 FMI 04 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 SENSOR

  1. Turn the disconnect switch and the key start switch to the ON position.

  2. Ensure that the diagnostic code is active.

  3. Observe the status of the diagnostic code. Disconnect the sensor from the machine harness.

Expected Result:

The CID 2416 FMI 04 diagnostic code remains active. The FMI has not changed and the FMI 04 diagnostic code is still active.

Results:

  • OK - The diagnostic code remains active. The sensor is correct. Proceed to Test Step 2.

  • NOT OK - The diagnostic code is no longer active. The sensor has failed.

    Repair: Replace the sensor.

    STOP

Test Step 2. CHECK THE WIRING HARNESS OF THE SENSOR FOR A SHORT TO GROUND

  1. Turn the key start switch and the disconnect switch to the OFF position.

  2. Disconnect the machine harness from the sensor.

  3. Disconnect the machine harness connector(s) from the ECM.

  4. Operate the machine and take the sensor through the operating range of the sensor.

  5. At the machine harness connector for the ECM, measure the resistance from the signal contact "J2-49" (wire R788-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 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 - One or more resistance measurements is not correct. There is a short in the machine harness.

    Repair: The short is between signal contact "J2-49" (wire R788-BU(Blue)) and the circuit with the low resistance measurement. Repair the machine harness or replace the machine harness.

    STOP

Test Step 3. CHECK IF THE DIAGNOSTIC CODE REMAINS

  1. Inspect the contacts of the harness connectors and clean the contacts.

  2. Reconnect all harness connectors.

  3. Turn the disconnect switch and the key start switch to the ON position.

  4. Operate the machine.

  5. Check the status of the CID 2416 FMI 04 diagnostic code.

Expected Result:

The CID 2416 FMI 04 diagnostic code is active.

Results:

  • OK - The CID 2416 FMI 04 diagnostic code is active. The diagnostic code has not been corrected. The ECM may have failed.

    Repair: It is unlikely that the ECM has failed. Exit this procedure and perform this procedure again. Contact the technical communicator of your dealership for possible consultation with AVSpare. This consultation may greatly reduce repair time. If the ECM must be replaced, refer to the Testing and Adjusting, "Electronic Control Module (ECM) - Replace" Section of this manual.

    STOP

  • NOT OK - The CID 2416 FMI 04 diagnostic code is not active. The diagnostic code does not exist at this time.

    Repair: The initial diagnostic code was probably caused by a poor electrical connection or a short at one of the harness connectors that was disconnected and reconnected. Resume normal machine operation.

    STOP

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