The following is a list of Diagnostic Trouble Codes (DTCs) that are associated with the solenoid valves of the machine.
Machine ECM (MID 299) | |||
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J1939 | CDL | Code Description | System Response |
374-3 | Swing Brake Solenoid : Voltage Above Normal | Machine swing function will be inoperable. | |
374-5 | Swing Brake Solenoid : Current Below Normal | Machine swing function will be inoperable. | |
374-6 | Swing Brake Solenoid : Current Above Normal | Machine swing function will be inoperable. | |
1160-3 | Hydraulic Lock Solenoid : Voltage Above Normal | Hydraulic lock solenoid will not function. | |
1160-5 | Hydraulic Lock Solenoid : Current Below Normal | Hydraulic lock solenoid will not function. | |
1160-6 | Hydraulic Lock Solenoid : Current Above Normal | Hydraulic lock solenoid will not function. |
Solenoids are used to shutoff, release, distribute, or mix fluids on the machine. Generally, multiple solenoids are located together on a manifold. The solenoid converts electrical energy into magnetic energy, moving a spool located inside the housing. As a result the valve is opened. A spring is used to hold the spool in position until the solenoid is energized.
The magnetic force that acts on the valve spool is created when a coil inside the solenoid is energized.
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Illustration 1 | g06575538 |
Machine ECM solenoid schematic |
Note: The diagram above is a simplified schematic of the Machine ECM and the Switch Panel connections. The schematic is electrically correct. However, not all the possible harness connectors are shown. Refer to the latest revision of Electrical Schematic, M0116913 for 320D3 GC excavator electrical systems.
Diagnostic Trouble Code Procedure
Required Tools | |||
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Tool | Part Number | Description | Qty |
T1 | 146-4080(1) | Digital Multimeter Group | 1 |
8T-3224 | Needle Tip Group | 1 | |
7X-1710 | Multimeter Probe Group | 1 | |
8T-8726 | Cable Assembly (Three Pin) (3-Pin Breakout) | 1 | |
T2 | JERD2129 | Cat® Electronic Technician (Cat ET) | 1 |
Windows-based PC | 1 | ||
538-5051 | Communication Adapter Gp | 1 | |
T3 | 6V-4148 | Connector Repair Kit (Sure Seal) | 1 |
T3 | 190-8900 | Connector Field Repair Kit (Deutsch) | 1 |
T4 | 175-3700 | Connector Repair Kit Deutsch DT | 1 |
(1) | This multimeter can use an RS232C cable to connect to a Laptop computer or Dataview tool gp for troubleshooting. |
Prior to beginning this procedure, inspect the harness connectors that are involved in this circuit. Poor connections can often be the cause of a problem in an electrical circuit. Verify that all connections in the circuit are clean, secure, and in good condition. Check the wiring harness for pinch points or abrasions. Look for and repair areas that indicate wires are exposed. If a problem with a connection is found, correct the problem and verify that the diagnostic code is active before performing a troubleshooting procedure.
- Identify the active FMI code associated with the components.
- Determine which code is present and use the list below to determine which procedure to follow.
- FMI 3 diagnostic code, proceed to "FMI 3".
- FMI 5 diagnostic code, proceed to "FMI 5".
- FMI 6 diagnostic code, proceed to "FMI 6".
Check The Machine Harness For A Short | ||
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Troubleshooting Test Steps | Values | Results |
1. The start switch and the disconnect switch remain in the OFF position. 2. Disconnect the harness connector from the solenoid. 3. Disconnect the ECM machine harness connectors. 4. Measure the resistance between the solenoid signal contact and all the contacts that are used in the ECM. |
Each reading is greater than 5K Ω. | Result: All resistance readings are greater than 5K Ω. Proceed to "Check If The Diagnostic Code Remains" Table 4. Result: One or more readings are less than 5 Ω. Repair: A short exists between the signal contact and the circuit with the low resistance. Repair or replace the machine harness. Note: A resistance that is greater than 5 Ω but less than 5K Ω would indicate a loose connection or a corroded connection in the circuit. A resistance measurement that is greater than 5K Ω would indicate an open in the circuit. Proceed to "Check If The Diagnostic Code Remains" Table 4. |
Check If The Diagnostic Code Remains | ||
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Troubleshooting Test Steps | Values | Results |
1. Reconnect all harness connectors. Return machine to normal operating condition. 2. Turn the start switch and the disconnect switch ON. 3. Clear all diagnostic codes. 4. Operate the machine. 5. Stop the machine and engage the safety. 6. Check if the diagnostic code is active. |
The diagnostic code is no longer present. | Result: The diagnostic code does not exist currently. The initial diagnostic code may have been caused by poor electrical connection or short at one of the harness connections. Resume machine operation. STOP. Result: The diagnostic trouble code has not been corrected. If the diagnostic code has not been corrected after performing the procedure a second time, the ECM may require replacement. Prior to replacing the ECM, always contact the Technical Communicator at your dealership for possible consultation with AVSpare. This consultation may effect repair time. Follow the steps in Troubleshooting, "ECM - Replace" if the ECM needs to be replaced. STOP. |
Check The Solenoid | ||
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Troubleshooting Test Steps | Values | Results |
1. Turn the start switch and the disconnect switch OFF. 2. Disconnect the solenoid from the machine harness. 3. At the harness connector for the solenoid, install a jumper wire between contact 1 and contact 2. 4. Turn the start switch and the disconnect switch ON. Do not start the engine. |
The FMI 5 diagnostic code changes to an FMI 6 after the jumper wire is installed. | Result: The harness is correct. The FMI 5 diagnostic code changes to an FMI 6 when the jumper wire is installed. The solenoid has failed. Repair: Replace the solenoid. Proceed to "Check If The Diagnostic Code Remains" Table 7. Result: The diagnostic code remains active. Proceed to "Check The Harness For An Open" Table 6. |
Check The Harness For An Open | ||
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Troubleshooting Test Steps | Values | Results |
1. Turn the start switch and the disconnect switch OFF. 2. Disconnect the harness connectors from the ECM. 3. The jumper wire remains installed. 4. At the machine harness connector for the ECM, measure the resistance between the signal circuit and return circuit. Note: For solenoids that return to ground, measure the resistance between the signal circuit at the ECM harness connector and frame ground. |
Each reading is less than 5 Ω. | Result: The reading is less than 5 Ω. The harness is correct. Proceed to "Check If The Diagnostic Code Remains" Table 7. Result: The reading is greater than 5K Ω. The open is in the signal circuit or the return circuit. Repair: Repair or replace the machine harness. Note: A resistance that is greater than 5 Ω but less than 5K Ω would indicate a loose connection or a corroded connection in the circuit. A resistance measurement that is greater than 5K Ω would indicate an open in the circuit. Proceed to "Check If The Diagnostic Code Remains" Table 7. |
Check If The Diagnostic Code Remains | ||
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Troubleshooting Test Steps | Values | Results |
1. Reconnect all harness connectors. Return machine to normal operating condition. 2. Turn the start switch and the disconnect switch ON. 3. Clear all diagnostic codes. 4. Operate the machine. 5. Stop the machine and engage the safety. 6. Check if the diagnostic code is active. |
The diagnostic code is no longer present. | Result: The diagnostic code does not exist currently. The initial diagnostic code may have been caused by poor electrical connection or short at one of the harness connections. Resume machine operation. STOP. Result: The diagnostic trouble code has not been corrected. If the diagnostic code has not been corrected after performing the procedure a second time, the ECM may require replacement. Prior to replacing the ECM, always contact the Technical Communicator at your dealership for possible consultation with AVSpare. This consultation may effect repair time. Follow the steps in Troubleshooting, "ECM - Replace" if the ECM needs to be replaced. STOP. |
Check The Solenoid | ||
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Troubleshooting Test Steps | Values | Results |
1. Turn the start switch and the disconnect switch OFF. 2. Disconnect the solenoid from the machine harness. 3. Turn the start switch and the disconnect switch ON. Do not start the engine. 4. Observe the status of the diagnostic code. |
The FMI 6 changes to an FMI 5 after the solenoid is disconnected. | Result: The circuit is correct. The solenoid has failed. Repair: Repeat the test. Verify the solenoid failure. Replace the solenoid. Proceed to "Check If The Diagnostic Code Remains" Table 10. Result: The diagnostic code remains active. Proceed to "Check Machine Harness For A Short To Ground" Table 9. |
Check Machine Harness For A Short To Ground | ||
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Troubleshooting Test Steps | Values | Results |
1. The machine harness remains disconnected from the solenoid. 2. Turn the start switch and the disconnect switch OFF. 3. Disconnect the harness connectors from the ECM. 4. At the harness connector for the ECM, measure the resistance between the solenoid signal contact and all ground contacts. |
Each reading is greater than 5K Ω. | Result: Machine harness correct. Proceed to "Check If The Diagnostic Code Remains" Table 10. Result: One or more of the resistance measurements are less than 5 Ω. A short circuit exists in the machine harness. Repair: A short circuit exists between the signal wire and the circuit with the low resistance. Repair or replace the machine harness. Note: A resistance that is greater than 5 Ω but less than 5K Ω would indicate a loose connection or a corroded connection in the circuit. A resistance measurement that is greater than 5K Ω would indicate an open in the circuit. Proceed to "Check If The Diagnostic Code Remains" Table 10. |
Check If The Diagnostic Code Remains | ||
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Troubleshooting Test Steps | Values | Results |
1. Reconnect all harness connectors. Return machine to normal operating condition. 2. Turn the start switch and the disconnect switch ON. 3. Clear all diagnostic codes. 4. Operate the machine. 5. Stop the machine and engage the safety. 6. Check if the diagnostic code is active. |
The diagnostic code is no longer present. | Result: The diagnostic code does not exist currently. The initial diagnostic code may have been caused by poor electrical connection or short at one of the harness connections. Resume machine operation. STOP. Result: The diagnostic trouble code has not been corrected. If the diagnostic code has not been corrected after performing the procedure a second time, the ECM may require replacement. Prior to replacing the ECM, always contact the Technical Communicator at your dealership for possible consultation with AVSpare. This consultation may effect repair time. Follow the steps in Troubleshooting, "ECM - Replace" if the ECM needs to be replaced. STOP. |