D6N Track-Type Tractor Caterpillar

Illustration 1	g02639699
Connections of the lower solenoid for the ripper

This diagnostic code is associated with ripper lower solenoid. The FMI 04 means the valve ECM has determined that the circuit has an open or a short to ground in the return circuit exists.

The possible causes are listed:

• The return circuit of the solenoid is shorted to ground.

• The energize circuit of the solenoid is open.

• The return circuit of the solenoid is open.

• The solenoid has failed.

• The valve 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 2211 FMI 04 is active before performing this procedure.

Note: Use a digital multimeter for the measurements in this procedure.

Note: Check the configuration of your machine for the number of implement electronic control modules.

Test Step 1. CHECK THE RETURN CIRCUIT OF THE SOLENOID FOR A SHORT TO GROUND.

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

2. Disconnect the solenoid from the machine harness.

3. Disconnect the machine harness at the valve ECM.

4. At the harness connector for the valve ECM, measure the resistance from the supply wire to all contacts used in the machine harness connector.

Expected Result:

Each resistance measurement is 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 between the supply wire and the circuit with the low resistance measurement.

  Repair: Repair the machine harness or replace the machine harness.

  STOP

Test Step 2. CHECK THE HARNESS FOR AN OPEN.

1. The key start switch and the disconnect switch remain in the OFF position.

2. The machine harness remains disconnected from the valve ECM.

3. The solenoid remains disconnected from the machine harness.

4. At the machine harness connector for the solenoid, place a jumper wire from contact 1 to contact 2.

5. At the machine harness connector for the valve ECM, measure the resistance from the supply wire to the return wire.

Expected Result:

The resistance should be less than 5.0 ohms.

Results:

• OK - The resistance is less than 5.0 ohms. The machine harness is correct. Proceed to Test Step 3.

• NOT OK - The resistance is greater than 5000 ohms. The resistance measurement is not correct. There is an open circuit in the machine harness.

  Repair: The open is in the supply wire or the return wire of the machine harness. Repair the machine harness or replace the machine harness.

  STOP

Test Step 3. CHECK THE SOLENOID.

1. Remove the jumper wire from the previous Test Step.

2. Reconnect the machine harness to the valve ECM.

3. Turn the disconnect switch and the key start switch to the ON position. Do not start the engine.

4. The solenoid remains disconnected from the machine harness.

5. At the machine harness connector for the solenoid, place a jumper wire from contact 1 to contact 2.

6. Observe the status of the diagnostic code.

Expected Result:

The diagnostic code is active. The diagnostic code changes from "FMI 04" to "FMI 06" after the jumper wire is installed.

Results:

• YES - The diagnostic code remains active. The diagnostic code changes from "FMI 04" to "FMI 06" after the jumper wire is installed.

  Repair: Repeat this test in order to verify that the solenoid has failed. Replace the solenoid. See the Testing and Adjusting, KENR5705, "Calibration" procedure in the service manual for your machine.

  STOP

• NO - The "FMI 04" diagnostic code remains active. Proceed to test step 4.

Test Step 4. CHECK IF THE DIAGNOSTIC CODE REMAINS.

1. Inspect the harness connectors. Clean the contacts of the harness connectors and check the wires for damage to the insulation caused by excessive heat, battery acid, or chafing.

2. Perform a 45 N (10 lb) pull test on each of the wires that are associated with the circuit.

3. 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.

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

5. Operate the machine.

6. Check the status of the diagnostic code.

Expected Result:

The diagnostic code is active.

Results:

• YES - The diagnostic code is active. The diagnostic code has not been corrected.

  Repair: Check the circuit again. An ECM failure is unlikely. Exit this procedure and perform this procedure again. Prior to replacing an ECM, always contact your dealership for possible consultation with Caterpillar. This consultation may greatly reduce repair time. If the ECM requires replacement, refer to Troubleshooting, "Electronic Control Module (ECM) - Replace".

  STOP

• NO - The diagnostic code is not active. The initial diagnostic code may have been caused by a poor electrical connection that was corrected when a harness connector was disconnected and reconnected. Resume normal machine operation.STOP