336F Excavator Caterpillar

Solenoid Return - Test

Usage:

Implement ECM 1

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

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Table 1
Implement ECM 1 MID 432
DTC	Code Description	System Response
3211-3	Pump to Boom Rod End Solenoid Return: Voltage Above Normal	Boom functions will be limited.
3211-4	Pump to Boom Rod End Solenoid Return: Voltage Below Normal	Boom functions will be limited.
3212-3	Pump to Boom Head End Solenoid Return: Voltage Above Normal	Boom functions will be limited.
3212-4	Pump to Boom Head End Solenoid Return: Voltage Below Normal	Boom functions will be limited.
3213-3	Pump to Bucket Rod End Solenoid Return: Voltage Above Normal	Bucket functions will be limited.
3213-4	Pump to Bucket Rod End Solenoid Return: Voltage Below Normal	Bucket functions will be limited.
3214-3	Pump to Bucket Head End Solenoid Return: Voltage Above Normal	Bucket functions will be limited.
3214-4	Pump to Bucket Head End Solenoid Return: Voltage Below Normal	Bucket functions will be limited.
3225-3	Boom Rod End to Tank Solenoid Return: Voltage Above Normal	Boom functions will be limited.
3225-4	Boom Rod End to Tank Solenoid Return: Voltage Below Normal	Boom functions will be limited.
3226-3	Boom Head End to Tank Solenoid Return: Voltage Above Normal	Boom functions will be limited.
3226-4	Boom Head End to Tank Solenoid Return: Voltage Below Normal	Boom functions will be limited.
3227-3	Bucket Rod End to Tank Solenoid Return: Voltage Above Normal	Bucket functions will be limited.
3227-4	Bucket Rod End to Tank Solenoid Return: Voltage Below Normal	Bucket functions will be limited.
3228-3	Bucket Head End to Tank Solenoid Return: Voltage Above Normal	Bucket functions will be limited.
3228-4	Bucket Head End to Tank Solenoid Return: Voltage Below Normal	Bucket functions will be limited.

The solenoid is 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 of the valve. 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.

Possible Causes for an FMI 3 Diagnostic code are:

The harness is shorted.
The Implement ECM has failed. A failure of the ECM is unlikely.

Possible causes for an FMI 4 diagnostic code are:

There is an open in the circuit.
The harness is shorted to ground.
The solenoid has failed.
The ECM has failed. A failure of the ECM is unlikely.

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Illustration 1	g03688401
Implement ECM 1 Solenoid Connections

Note: The diagram above is a simplified schematics of ECM connections. The schematic is electrically correct. However, not all of the possible harness connectors are shown. Refer to the latest revision of Electrical Schematic, UENR5223 for the complete schematic.

Implement ECM 2

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Table 2
Implement ECM 2 MID 433
DTC	Code Description	System Response
3215-3	Pump to Stick Rod End Solenoid Return: Voltage Above Normal	Stick functions will be limited.
3215-4	Pump to Stick Rod End Solenoid Return: Voltage Below Normal	Stick functions will be limited.
3216-3	Pump to Stick Head End Solenoid Return: Voltage Above Normal	Stick functions will be limited.
3216-4	Pump to Stick Head End Solenoid Return: Voltage Below Normal	Stick functions will be limited.
3217-3	Pump to Swing Motor Left Solenoid Return: Voltage Above Normal	Swing functions will be limited.
3217-4	Pump to Swing Motor Left Solenoid Return: Voltage Below Normal	Swing functions will be limited.
3218-3	Pump to Swing Motor Right Solenoid Return: Voltage Above Normal	Swing functions will be limited.
3218-4	Pump to Swing Motor Right Solenoid Return: Voltage Below Normal	Swing functions will be limited.
3229-3	Stick Rod End to Tank Solenoid Return: Voltage Above Normal	Stick functions will be limited.
3229-4	Stick Rod End to Tank Solenoid Return: Voltage Below Normal	Stick functions will be limited.
3230-3	Stick Head End to Tank Solenoid Return: Voltage Above Normal	Stick functions will be limited.
3230-4	Stick Head End to Tank Solenoid Return: Voltage Below Normal	Stick functions will be limited.
3231-3	Swing Motor Left to Tank Solenoid Return: Voltage Above Normal	Swing functions will be limited.
3231-4	Swing Motor Left to Tank Solenoid Return: Voltage Below Normal	Swing functions will be limited.
3232-3	Swing Motor Right to Tank Solenoid Return: Voltage Above Normal	Swing functions will be limited.
3232-4	Swing Motor Right to Tank Solenoid Return: Voltage Below Normal	Swing functions will be limited.

The magnetic force that acts on the valve spool is created when a coil inside the solenoid is energized.

Possible Causes for an FMI 3 Diagnostic code are:

The harness is shorted.
The Implement ECM has failed. A failure of the ECM is unlikely.

Possible causes for an FMI 4 diagnostic code are:

There is an open in the circuit.
The harness is shorted to ground.
The solenoid has failed.
The ECM has failed. A failure of the ECM is unlikely.

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Illustration 2	g03688400
Implement ECM 2 Solenoid Connections

Implement ECM 3

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Table 3
Implement ECM 3 MID 434
DTC	Code Description	System Response
3219-3	Pump to Attachment #1 Rod End Solenoid Return: Voltage Above Normal	Attachment functions will be limited.
3219-4	Pump to Attachment #1 Rod End Solenoid Return: Voltage Below Normal	Attachment functions will be limited.
3220-3	Pump to Attachment #1 Head End Solenoid Return: Voltage Above Normal	Attachment functions will be limited.
3220-4	Pump to Attachment #1 Head End Solenoid Return: Voltage Below Normal	Attachment functions will be limited.
3233-3	Attachment #1 Rod End to Tank Solenoid Return: Voltage Above Normal	Attachment functions will be limited.
3233-4	Attachment #1 Rod End to Tank Solenoid Return: Voltage Below Normal	Attachment functions will be limited.
3234-3	Attachment #1 Head End to Tank Solenoid Return: Voltage Above Normal	Attachment functions will be limited.
3234-4	Attachment #1 Head End to Tank Solenoid Return: Voltage Below Normal	Attachment functions will be limited.

The magnetic force that acts on the valve spool is created when a coil inside the solenoid is energized.

Possible Causes for an FMI 3 Diagnostic code are:

The harness is shorted.
The Implement ECM has failed. A failure of the ECM is unlikely.

Possible causes for an FMI 4 diagnostic code are:

There is an open in the circuit.
The harness is shorted to ground.
The solenoid has failed.
The ECM has failed. A failure of the ECM is unlikely.

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Illustration 3	g03688399
Implement ECM 3 Solenoid Connections

Diagnostic Trouble Code Procedure

Note: 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 Table 4.
FMI 4 diagnostic code, proceed to Table 5.

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Table 4
FMI 3 Troubleshooting
Troubleshooting Test Steps	Values	Results
1. Check The Machine Harness For A Short A. Turn the key start switch and the disconnect switch OFF. B. Disconnect the harness connection at solenoid. C. Disconnect the harness connection at the ECM. D. Measure the resistance of solenoid signal contact to all other ECM connections.	Each reading is greater than 5K Ω.	OK - All resistance readings are greater than 5K Ω . Proceed to Test Step 2. NOT OK - 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 Test Step 2.
2. Check If The Diagnostic Code Remains A. Reconnect all harness connectors. Return machine to normal operating condition. B. Turn the key start switch and the disconnect switch ON. C. Clear all diagnostic codes. D. Operate the machine. E. Stop the machine and engage the safety lock lever. F. Check if the diagnostic code is active.	The diagnostic code is no longer present.	OK - The diagnostic code does not exist at this time. The initial diagnostic code may have been caused by poor electrical connection or short at one of the harness connections. Resume machine operation. STOP. NOT OK - 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 Caterpillar. This consultation may effect repair time. Follow the steps in Troubleshooting, "ECM - Replace" if the ECM needs to be replaced. STOP.

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Table 5
FMI 4 Troubleshooting
Troubleshooting Test Steps	Values	Results
1. Check The Machine Harness For An Open A. Turn the key start switch and the disconnect switch OFF. B. Disconnect the solenoid from the machine harness. C. Disconnect the harness connectors at the ECM. D. Connect a jumper wire between the signal contact and return contact at the solenoid harness connector. E. At the ECM side of the machine harness, measure the resistance between the signal and return contact.	Each reading is less than 5 Ω.	OK - The reading is less than 5 Ω, the harness is correct. Proceed to Test Step 2. NOT OK - The reading is greater than 5K Ω. There is an open in machine harness. Repair: The open is in the signal wire or the return wire. 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 Test Step 3.
2. Check The Harness For A Short To Ground A. The key start switch and disconnect switch remain OFF. B. The ECM and solenoid remain disconnected from the machine harness. C. Remove the jumper wire that was installed in the previous Test Step. D. Measure the resistance between the signal contact and frame ground. Record the measurement. E. Measure the resistance between the return contact and frame ground. Record the measurement.	Each reading is greater than 5K Ω.	OK - The reading is greater than 5K Ω, the harness is correct. Proceed to Test Step 3. NOT OK - The reading is less than 5 Ω. There is a short in the machine harness. Repair: The short is between the wires with the low resistance measurement. 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 Test Step 3.
3. Check If The Diagnostic Code Remains A. Reconnect all harness connectors. Return machine to normal operating condition. B. Turn the key start switch and the disconnect switch ON. C. Clear all diagnostic codes. D. Operate the machine. E. Stop the machine and engage the safety lock lever. F. Check if the diagnostic code is active.	The diagnostic code is no longer present.	OK - The diagnostic code does not exist at this time. The initial diagnostic code may have been caused by poor electrical connection or short at one of the harness connections. Resume machine operation. STOP. NOT OK - 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 Caterpillar. This consultation may effect repair time. Follow the steps in Troubleshooting, "ECM - Replace" if the ECM needs to be replaced. STOP.