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| Illustration 1 | g02350552 |
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Location of the Quick Coupler Unlock Solenoid | |
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| Illustration 2 | g03342378 |
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Schematic of the Quick Coupler Unlock Solenoid | |
This diagnostic code is associated with the Quick Coupler Unlock Solenoid. The FMI 06 diagnostic code means that the ECM has detected that the current for the solenoid circuit is above normal.
Conditions that could cause this diagnostic code to be activated are listed below:
- The energize circuit of the solenoid is shorted to a ground source.
- The solenoid has failed.
- The switch panel has failed.
- The ECM has failed. A failure of the Machine ECM is unlikely.
Note: Before performing this procedure, inspect the harness connectors that are involved in the circuit. Poor connections can often be the cause of a problem in an electrical circuit. Verify that all connections in the circuit are clean, that all connections are secure and that all connections are in good condition. If a problem with a connection is found, correct the problem and verify that this diagnostic code is active before performing this procedure.
Note: The following test procedure may create other diagnostic codes. Ignore these created diagnostic codes. Clear any created diagnostic codes after the original diagnostic code has been corrected.
System Response:
A Level 1 warning will be generated.
Note: The resistance of the solenoid coil should be approximately 7 ohms at
Test Step 1. CHECK THE SOLENOID
- Turn the disconnect switch and the key start switch to the ON position. Do not start the engine.
- Observe the status of the diagnostic code.
- Disconnect the solenoid with the active diagnostic code from the machine harness.
Expected Result:
The active CID 1530 FMI 06 diagnostic code changes to a CID 1530 FMI 05 diagnostic code when the solenoid is disconnected.
Results:
- YES - The active CID 1530 FMI 06 diagnostic code changes to a CID 1530 FMI 05 diagnostic code when the solenoid is disconnected. The solenoid circuit in the machine harness is correct.
Repair: The solenoid has failed. Repeat this test "CHECK THE SOLENOID" to verify the solenoid failure.Temporarily connect a new solenoid to the harness. Do not install the solenoid. Verify that the replacement solenoid has cleared the diagnostic code. If the code is no longer active, permanently install the new solenoid. Verify that there are no active diagnostic codes for the solenoid. Clear any logged diagnostic codes.
STOP
- NO - The CID 1530 FMI 06 diagnostic code remains active. Disconnecting the solenoid did not change the status of the active diagnostic code. The solenoid is not the cause of the problem. Proceed to Test Step 2.
Test Step 2. CHECK THE ENERGIZE CIRCUIT OF THE SOLENOID FOR A SHORT TO GROUND
The solenoid remains disconnected from the machine harness.
- Turn the key start switch and the disconnect switch to the OFF position.
- Disconnect the connectors of the switch panel C1, C13, and C2 from the switch panel.
- At the machine harness connectors of the switch panel, measure the resistance from the signal contact C2-13 (wire 780-PU(Purple)) to frame ground. Measure the resistance from the signal contact C2-13 (wire 780-PU(Purple)) to all of the other contacts that are used in connectors of the switch panel.
- While observing the multimeter resistance measurements, wiggle the machine harness connectors for the ECM and the solenoid. Gently pull on the wires and gently move the wires around.
Expected Result:
Each resistance measurement is greater than 5000 ohms at all times during the manipulation of the harness and connectors.
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 of the resistance measurements is less than 5000 ohms. The resistance measurement is indicating that a short is present in the machine harness. The short is between wire 780-PU(Purple) and either frame ground or the circuit with the low resistance measurement.
Repair: For information on testing for short circuits and finding short circuits, refer to Testing and Adjusting, "Wiring Harness (Short Circuit) - Test". Repair the machine harness or replace the machine harness.
STOP
Test Step 3. CHECK THE STATUS OF THE DIAGNOSTIC CODE
- Inspect the harness connectors. Clean the contacts of the harness connectors. Check the wires for damage to the insulation that 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 sensor circuit. - Reconnect all harness connectors. Make sure that the connectors are fully seated. Observe that the clips for each connector are fastened securely.
- Turn the disconnect switch and the key start switch to the ON position.
- Operate the machine.
- Check the status of the CID 1530 FMI 06 diagnostic code.
Expected Result:
The CID 1530 FMI 06 diagnostic code is still active.
Results:
- YES - The CID 1530 FMI 06 diagnostic code is still active. The diagnostic code has not been corrected.
Repair: Ensure that you have the latest version of software for your specific Machine ECM. Refer to the Testing and Adjusting, "Electronic Control Module (ECM) - Flash Program" section of this manual for the correct procedure.Turn the disconnect switch to the ON position. Turn the key start switch to the ON position and verify that reflashing the ECM has cleared the problem.If the diagnostic code is still present after flashing the latest software to your ECM, contact the Technical Communicator for your dealership for possible consultation with Caterpillar.This consultation may greatly reduce repair time. If the ECM requires replacement, see Testing and Adjusting, "Electronic Control Module (ECM) - Replace".
STOP
- NO - The CID 1530 FMI 06 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. Resume normal machine operation.
STOP