Conditions Which Generate This Code:
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| Illustration 1 | g02116441 |
Schematic of the circuit for the hydraulic load sensor | |
This diagnostic code is associated with the hydraulic load. The FMI 03 means that the Machine ECM determined that the sensor signal voltage is too high.
The possible causes of this diagnostic code are listed below:
- The sensor has failed.
- The sensor supply or the ground circuit in the machine harness is open.
- The signal circuit in the machine harness is shorted high to the +battery.
- The signal circuit in the machine harness is open or the sensor is disconnected.
- The Machine ECM has failed. This is unlikely.
Test Step 1. CHECK THE SENSOR POWER.
- Turn the disconnect switch and the key start switch to the ON position.
- Insert the 7X-1710 Multimeter Probe leads into the back of the sensor connector along side of contact A (wire L730-OR) and contact B (wire L740-BR).
- Measure the voltage (DCV) between signal contact A (wire L730-OR) and ground contact B (wire L740-BR).
Expected Result:
The voltage is 5 DCV.
Results:
- OK - The voltage is 5 DCV. The system voltage is correct. Proceed to Test Step 2.
- NOT OK - The voltage is NOT 5 DCV. There is an open circuit.
Repair: Repair the machine harness or replace the machine harness.
STOP
Test Step 2. CHECK THE SIGNAL VOLTAGE.
- Insert the 7X-1710 Multimeter Probe leads into the back of the sensor connector along side of contact C (wire J984-PK) and contact B (wire L740-BR).
- Measure the signal voltage and record the signal voltage.
Expected Result:
The signal voltage is between approximately .7 DCV and 5.0 DCV.
Results:
- .7 DCV TO 5.0 DCV. - The signal voltage at the sensor is correct. Proceed to Test Step 3.
- > 6.0 VDC. - The voltage is NOT between .7 DCV and 5.0 DCV. The signal voltage is not correct. Proceed to Test Step 3.
Test Step 3. CHECK THE SIGNAL CIRCUIT OF THE MACHINE HARNESS.
- Insert the 7X-1710 Multimeter Probe leads into the back of the machine harness connector along side of the signal contact C (wire J984-PK) and ground circuit wires.
- At the machine harness connector for the sensor, measure the voltage between signal contact C (wire J984-PK) and ground contact B (wire L740-BR).
- Compare this measurement with the voltage that was measured in the previous test "CHECK THE SIGNAL VOLTAGE".
Expected Result:
The signal voltage is equal to the voltage that was recorded in the previous test.
Results:
- OK - The signal voltage is equal to the voltage that was recorded in the previous test. The ECM is receiving a valid signal voltage. The ECM has failed.
Repair: It is unlikely that the ECM has failed. Exit this procedure and perform the CID 2997 FMI 03 procedure again. If the fault is not found replace the ECM. See the Testing and Adjusting, "Electronic Control Module (ECM) Replace" section in this manual.
STOP
- NOT OK - The signal voltage is NOT equal to the voltage that was recorded in the previous test. The machine harness has an open in the signal or ground circuits.
Repair: Repair the machine harness or replace the machine harness.
STOP
Test Step 4. CHECK THE MACHINE HARNESS.
The signal voltage is greater than 5.0 DCV. The probable cause is a short to system voltage (+battery) in the machine harness or the sensor has failed.
- Disconnect the sensor from the machine harness connector.
- At the machine harness connector for the sensor, measure the voltage between signal contact C (wire J984-PK) and ground contact B (wire L740-BR).
Expected Result:
The voltage is greater than 5.0 DCV.
Results:
- OK - The voltage is greater than 5.0 DCV. The voltage is not correct. The signal circuit of the machine harness is shorted to the +battery.
Repair: Repair the machine harness or replace the machine harness.
STOP
- NOT OK - The voltage is approximately 5.0 ± 1.0 DCV. The voltage is correct for a good harness. The sensor has failed.
Repair: Replace the sensor.
STOP