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| Illustration 1 | g02666723 |
Connections of the winch spool (reel) in solenoid | |
This diagnostic code is associated with the Winch spool (reel) in solenoid. The FMI 03 means that the ECM has determined that the voltage of the solenoid circuit is above normal.
The possible causes of this diagnostic code are listed:
- The solenoid has failed.
- The energize circuit of the solenoid is shorted to the +battery circuit.
- 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 1884 - FMI 03 is active before performing this procedure.
Note: Use a digital multimeter for the measurements in this procedure.
Test Step 1. Check the solenoid circuit for a short to the +battery circuit
- Turn the key start switch and the disconnect switch to the OFF position.
- Disconnect the machine harness at the winch solenoid connector.
- At the winch solenoid connector, measure the resistance from contact 7 wire (176-YL) to contact 8 wire(F869-PK.
Expected Result:
Each resistance measurement should be greater than 5000 ohms.
Results:
- YES - Each resistance measurement is greater than 5000 ohms. The machine harness is correct. Proceed to test step 2.
- NO - Each resistance measurement is not greater than 5000 ohms. There is a short in the machine harness. The short is between contact 7 wire (176-YL) and contact 8 wire(F869-PK) and the circuit with the low resistance measurement. Repair the machine harness or replace the machine harnessSTOP
Test Step 2. Check the operation of the ecm
The disconnect switch and the key start switch remain in the OFF position. The machine harness connectors for the solenoid and the ECM remain disconnected.
- At the J1 connector for the ECM, use a wire removal tool to remove wire (176-YL) from contact J1-65.
- Reconnect the machine harness J1 and J2 connectors to the ECM.
- Turn the disconnect switch and the key start switch to the ON position.
- Observe the status of the active diagnostic code.
Expected Result:
The FMI 03 changes to an FMI 05 after the wire is disconnected.
Results:
- YES - The FMI 03 changes to an FMI 05 after the wire is disconnected. The ECM has responded correctly to the condition of an open circuit. Reinstall the disconnected wire to the correct space in the ECM connector before proceeding to the next Test Step. Proceed to Test Step 3.
- NO - The FMI 03 remains active. The status of the active diagnostic code did not change when the wire was disconnected from the ECM.
Repair: The ECM has not responded correctly to the condition of an open circuit. The operation of the ECM is not correct. Prior to replacing an ECM, always contact your technical communicator for a possible consultation with Caterpillar. This consultation may greatly reduce repair time. If the ECM requires replacing, refer to Troubleshooting, "Electronic Control Module (ECM) - Replace".
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Test Step 3. Check the status of the diagnostic code
- Inspect the harness connectors. Clean the contacts of the harness connectors and check the wires for damage to the insulation. Damage is caused by excessive heat, corrosion, or chafing.
- Perform a 45 N (10 lb) pull test on each of the wires that are associated with the circuit.
- Reconnect all harness connectors in order to make sure that the connectors are fully seated. Also, make sure that the clips for each connector are fastened.
- Turn the disconnect switch and the key start switch to the ON position.
- Operate the machine.
- Determine if the CID 1884 - FMI 03 diagnostic code is active.
Expected Result:
The CID 1884 - FMI 03 diagnostic code is not active.
Results:
- YES - The CID 1884 - FMI 03 diagnostic code is not active. The problem does not exist at this time.
Repair: The initial diagnostic code was probably caused by a poor electrical connection that was disconnected and reconnected. Resume normal machine operation.
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- NO - The CID 1884 - FMI 03 diagnostic code is active.
Repair: An ECM failure is unlikely. Exit this procedure and perform this procedure again. If the cause of the diagnostic code is not found, the ECM may have failed. Prior to replacing an ECM, always contact your technical communicator for possible consultation with Caterpillar. This consultation may greatly reduce repair time. Refer to Troubleshooting, "Electronic Control Module (ECM) - Replace".
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