320D3 GC Excavators Machine Electronic Control System Solenoid Valve - Test Caterpillar


Solenoid Valve - Test
`
320D3 GC Excavators Machine Electronic Control System [M0117992]
HYDRAULIC SYSTEM
VALVE GP-SOLENOID
320D3 GC Excavators Machine Electronic Control System Solenoid Valve - Test
1.1. Machine ECM
2.1. Diagnostic Trouble Code Procedure
3.1. FMI 3
4.1. FMI 5
5.1. FMI 6

Machine ECM

The following is a list of Diagnostic Trouble Codes (DTCs) that are associated with the solenoid valves of the machine.

Table 1
Machine ECM (MID 299) 
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.



Illustration 1g06575538
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

Table 2
Required Tools 
Tool  Part Number  Description  Qty 
T1  146-4080(1)  Digital Multimeter Group 
8T-3224 Needle Tip Group 
7X-1710 Multimeter Probe Group 
8T-8726 Cable Assembly (Three Pin) (3-Pin Breakout) 
T2  JERD2129  Cat® Electronic Technician (Cat ET) 
Windows-based PC 
538-5051 Communication Adapter Gp 
T3  6V-4148  Connector Repair Kit (Sure Seal) 
T3  190-8900  Connector Field Repair Kit (Deutsch) 
T4  175-3700  Connector Repair Kit Deutsch DT 
(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.

  1. Identify the active FMI code associated with the components.

  2. 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".

FMI 3

Table 3
Check The Machine Harness For A Short 
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. 

Table 4
Check If The Diagnostic Code Remains 
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

FMI 5

Table 5
Check The Solenoid 
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. 

Table 6
Check The Harness For An Open 
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. 

Table 7
Check If The Diagnostic Code Remains 
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

FMI 6

Table 8
Check The Solenoid 
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. 

Table 9
Check Machine Harness For A Short To Ground 
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. 

Table 10
Check If The Diagnostic Code Remains 
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

Information System:

3512E Locomotive Engines Catalyst (SCR) - Install
320D3 GC Excavators Machine Electronic Control System Sensor Supply - Test
320D3 GC Excavators Machine Electronic Control System Sensor Signal (PWM) - Test
320D3 GC Excavators Machine Electronic Control System Sensor Signal (Analog, Passive) - Test
320D3 GC Excavators Machine Electronic Control System Sensor Signal (Analog, Active) - Test
320D3 GC Excavators Machine Electronic Control System Relay - Test
320D3 GC Excavators Machine Electronic Control System Engine Speed Control - Test
Loader Calibration may Fail on Certain 432 and 444 Back Hoe Loaders {7000, 7490, 7610, 7620}
374 Hydraulic Excavator Machine Systems Cab - Remove and Install
910, 914 and 920 Compact Wheel Loader Power Train Axle (Rear) - Assemble
Caterpillar Switchgear Remote Access System Service Tool Tech-Link is Now Available for All Cat Generator Sets {7002, 7451, 7606, 7635}
320D3 GC Excavators Machine Electronic Control System CAN Data Link - Test
320D3 GC Excavators Machine Electronic Control System Switch Circuits - Test
320D3 GC Excavators Machine Electronic Control System Window Wiper Delay - Test
320D3 GC Excavators Machine Electronic Control System Connector Contact Description
320D3 GC Excavators Machine Systems Specifications Stick Cylinder
320D3 GC Machine System Swing Motor - Disassemble
320D3 GC Machine System Swing Motor - Assemble
335 Hydraulic Excavator Machine Systems Blade - Remove and Install
335 Hydraulic Excavator Machine Systems Recoil Spring - Disassemble
335 Hydraulic Excavator Machine Systems Recoil Spring - Assemble
M314, M315, M316, M318, M319, and M320 Wheeled Excavator Machine System Calibrations (Cat ET)
Improved Push Button Switch Group (HORN) Is Now Used on Certain Cat Products {1435, 7332}
New EC520 Controller Software is Now Available for Cat GRADE System {7620}