924K, 926M, 930K, 930M, 938K and 938M Wheel Loaders Caterpillar

Solenoid Valve - Test

Usage:

930K FRK

Machine ECM

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

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Table 1
Machine ECM (MID 39)
DTC	Code Description	System Response
133-3	Transmission Pilot Pressure Supply: Voltage Above Normal	The power train pilot is stuck ON. The ECM is unable to disable the power train if another serious failure occurs.
133-5	Transmission Pilot Pressure Supply: Current Below Normal	The power train is disabled. The machine is unable to move.
133-6	Transmission Pilot Pressure Supply: Current Above Normal	The power train is disabled. The machine is unable to move.
354-3	Raise Solenoid # 1: Voltage Above Normal	All implement commands are inhibited.
354-5	Raise Solenoid # 1: Current Below Normal	Raise commands are inhibited.
354-6	Raise Solenoid # 1: Current Above Normal	Raise commands are inhibited.
354-13	Raise Solenoid # 1: Out of Calibration	All functions are allowed using the default current values.
355-3	Lower Solenoid # 1: Voltage Above Normal	All implement commands are inhibited.
355-5	Lower Solenoid # 1: Current Below Normal	Lower commands are inhibited.
355-6	Lower Solenoid # 1: Current Above Normal	Lower commands are inhibited.
355-13	Lower Solenoid # 1: Out of Calibration	All functions are allowed using the default current values.
356-3	Dump Solenoid # 1: Voltage Above Normal	All implement commands are inhibited.
356-5	Dump Solenoid # 1: Current Below Normal	Dump commands are inhibited.
356-6	Dump Solenoid # 1: Current Above Normal	Dump commands are inhibited.
356-13	Dump Solenoid # 1: Out of Calibration	All functions are allowed using the default current values.
357-3	Rackback Solenoid # 1: Voltage Above Normal	All implement commands are inhibited.
357-5	Rackback Solenoid # 1: Current Below Normal	Rackback commands are inhibited.
357-6	Rackback Solenoid # 1: Current Above Normal	Rackback commands are inhibited.
357-13	Rackback Solenoid # 1: Out of Calibration	All functions are allowed using the default current values.
358-3	Implement Pilot Pressure Supply Solenoid: Voltage Above Normal	All implement lift and tilt commands are allowed to run at reduced performance. Third and forth commands are allowed to run without being reduced.
358-5	Implement Pilot Pressure Supply Solenoid: Current Below Normal	All implement commands are inhibited.
358-6	Implement Pilot Pressure Supply Solenoid: Current Above Normal	All implement commands are inhibited.
491-3	Third Function Forward Solenoid: Voltage Above Normal	All implement commands are inhibited.
491-5	Third Function Forward Solenoid: Current Below Normal	Third function forward command is inhibited.
491-6	Third Function Forward Solenoid: Current Above Normal	Third function forward command is inhibited.
492-3	Third Function Reward Solenoid: Voltage Above Normal	All implement commands are inhibited.
492-5	Third Function Reward Solenoid: Current Below Normal	Third function rearward function is inhibited.
492-6	Third Function Reward Solenoid: Current Above Normal	Third function rearward function is inhibited.
493-3	Fourth Function Forward Solenoid: Voltage Above Normal	All implement commands are inhibited.
493-5	Fourth Function Forward Solenoid: Current Below Normal	Fourth function forward is inhibited.
493-6	Fourth Function Forward Solenoid: Current Above Normal	Fourth function forward is inhibited.
494-3	Fourth Function Reward Solenoid: Voltage Above Normal	All implement commands are inhibited.
494-5	Fourth Function Reward Solenoid: Current Below Normal	Fourth function reward is inhibited.
494-6	Fourth Function Reward Solenoid: Current Above Normal	Fourth function reward is inhibited.
681-3	Parking Brake Solenoid: Voltage Above Normal	The machine is unable to release the parking brake.
681-5	Parking Brake Solenoid: Current Below Normal	The machine is unable to release the parking brake.
681-6	Parking Brake Solenoid: Current Above Normal	The machine is unable to release the parking brake.
681-7	Parking Brake Solenoid: Mechanical System Not Responding Properly	The parking brake solenoid is commanded to release and the parking brake is still engaged.
740-3	Differential Lock Solenoid: Voltage Above Normal	Front differential lock will be engaged at all times.
740-5	Differential Lock Solenoid: Current Below Normal	Front differential will not engage.
740-6	Differential Lock Solenoid: Current Above Normal	Front differential will not engage.
1401-3	Transmission Solenoid 1: Voltage Above Normal	The transmission clutch is engaged and cannot be released. Maximum machine speed is limited to 15 km/h (9.32 mph).
1401-5	Transmission Solenoid 1: Current Below Normal	The transmission clutch is released and cannot be engaged. Maximum machine rimpull is reduced to 25% of normal operation.
1401-6	Transmission Solenoid 1: Current Above Normal	The transmission clutch is released and cannot be engaged. Maximum machine rimpull is reduced to 25% of normal operation.
1401-13	Transmission Solenoid 1: Out of Calibration	Transmission clutch engagements may be rough or slow in this condition.
2292-3	Quick Steering Solenoid: Voltage Above Normal	Quick steer will be active at all times, machine will downshift in ranges 3, or 4 when fault occurs, machine will not shift above range 2 until the fault is cleared.
2292-5	Quick Steering Solenoid: Current Below Normal	Quick steer will not engage.
2292-6	Quick Steering Solenoid: Current Above Normal	Quick steer will not engage.
2730-3	Drive Pump Forward Control Solenoid: Voltage Above Normal	The power train drive pump is being forced to maximum output in the forward direction. The machine ECM will disable the power train when machine speed is below 5 km (3.12 miles) per hour. After the fault is cleared, a key cycle is required before the drivetrain is enabled.
2730-5	Drive Pump Forward Control Solenoid: Current Below Normal	The machine is unable to travel in the forward direction. The machine is not allowed to shift out of neutral.
2730-6	Drive Pump Forward Control Solenoid: Current Above Normal	The machine is unable to travel in the forward direction. The machine is not allowed to shift out of neutral.
2730-13	Drive Pump Forward Control Solenoid: Out of Calibration	Forward speed control performance at low and medium travel speeds may be poor or incorrect.
2731-3	Drive Pump Reverse Control Solenoid: Voltage Above Normal	The power train drive pump is being forced to maximum output in the reverse direction. The machine ECM will disable the power train when machine speed in below 5 km/h (3.12 mph) After the fault is cleared, a key cycle is required before the drivetrain is enabled.
2731-5	Drive Pump Reverse Control Solenoid: Current Below Normal	The machine is unable to travel in the reverse direction. The machine is not allowed to shift out of neutral.
2731-6	Drive Pump Reverse Control Solenoid: Current Above Normal	The machine is unable to travel in the reverse direction. The machine is not allowed to shift out of neutral.
2731-13	Drive Pump Reverse Control Solenoid: Out of Calibration	Reverse speed control performance at low and medium travel speeds may be poor or incorrect.
3563-3	Drive Motor # 1 Solenoid: Voltage Above Normal	Machine rimpull performance is reduced to 80% of normal operation. Speed control performance above 17 km/h (10.56 mph) may be compromised.
3563-5	Drive Motor # 1 Solenoid: Current Below Normal	The machine maximum travel speed is limited to less than 17 km/h (10.56 mph)
3563-6	Drive Motor # 1 Solenoid: Current Above Normal	The machine maximum travel speed is limited to less than 17 km/h (10.56 mph)
3563-13	Drive Motor # 1 Solenoid: Out of Calibration	Machine speed control performance at high travel speed may be poor or incorrect.
3564-3	Drive Motor # 2 Solenoid: Voltage Above Normal	Rimpull performance reduced to 25% of normal operation.
3564-5	Drive Motor # 2 Solenoid: Current Below Normal	The machine maximum travel speed is limited to 5 km/h (3.12 mph)
3564-6	Drive Motor # 2 Solenoid: Current Above Normal	The machine maximum travel speed is limited to 5 km/h (3.12 mph).
3564-13	Drive Motor # 2 Solenoid: Out of Calibration	Machine speed control performance at medium travel may be poor or incorrect.

Possible Causes for an FMI 3 diagnostic code are:

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

Possible causes for an FMI 5 diagnostic code are:

There is an open in the circuit.
The solenoid has failed.
The sensor was activated in Cat ET when the component is not on the machine.
The ECM has failed. A failure of the ECM is unlikely.

Possible causes for an FMI 6 diagnostic code are:

A wire is shorted to ground.
The solenoid has failed.
The Machine ECM has failed. A failure of the ECM is unlikely.

Possible causes for an FMI 7 diagnostic code are:

The mechanical system has failed.
The solenoid has a non-detectable failure.
The sensor has a non-detectable failure.
The ECM has failed. A failure of the ECM is unlikely.

Possible causes for an FMI 13 diagnostic code are:

System has gone out of calibration
Calibration has never been performed

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Illustration 1	g03752116
Schematic of the solenoid connections

Note: The diagram above is a simplified schematic of the connections for the solenoid connections. The schematic is electrically correct. However, not all of the possible harness connectors are shown. Refer to the latest revision of the electrical schematic for the specific machine being serviced for the complete schematic.

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 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 this diagnostic code is active before performing a troubleshooting procedure.

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Table 2
Troubleshooting Test Steps	Values	Results
1. Identify Active FMI Code Associated With Solenoid Circuit	Code present.	FMI 3 diagnostic code, proceed to Test Step 2. FMI 5 diagnostic code, proceed to Test Step 3. FMI 6 diagnostic code, proceed to Test Step 5. FMI 7 diagnostic code, refer to Troubleshooting, "Parking Brake System" within this manual. FMI 13 diagnostic code, proceed to Test Step 7.
Begin Process For FMI 3 Troubleshooting HERE
2. 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 J1 and J2 connectors from ECM. D. Measure the resistance of solenoid signal contact to all J1 and J2 contacts.	Each reading is greater than 5K Ω.	OK - All resistance readings are greater than 5K Ω . Proceed to Test Step 8. 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 8.
Begin Process For FMI 5 Troubleshooting HERE
3. Check The Solenoid A. Turn the key start switch and the disconnect switch OFF. B. Disconnect the solenoid from the machine harness. C. Place a jumper wire between contact 1 and contact 2, at the harness connector for the solenoid. D. Turn the key start switch and the disconnect switch ON. Do not start the engine.	The code changes to FMI 6 after the jumper wire is installed.	OK - The circuit is correct., the solenoid has failed. Repair: Replace the solenoid. Proceed to Test Step 8. NOT OK - The diagnostic code remains active. Proceed to Test Step 4.
4. Check The Machine Harness For An Open. A. Turn the key start switch and the disconnect switch OFF. B. Disconnect the harness connectors from the ECM (or switch panel). C. The jumper wire remains installed. D. At the machine harness connector for the ECM, measure the resistance at the ECM contacts for the solenoid.	Each reading is less than 5 Ω.	OK - The reading is less than 5 Ω, the harness is correct. Proceed to Test Step 8. NOT OK - The reading is greater than 5K Ω. Circuit open in machine harness. Repair: The open is in the wire for the solenoid signal or the return wire for the solenoid. 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 8.
Begin Process For FMI 6 Troubleshooting HERE
5. Check The Solenoid A. Turn the key start switch and the disconnect switch OFF. B. Disconnect the solenoid from the machine harness. C. Turn the key start switch and the disconnect switch ON. Do not start the engine.	The FMI 6 diagnostic code changes to an FMI 5 diagnostic code after the jumper wire is installed.	OK - The circuit is correct. The solenoid has failed. Repair: Repeat the jumper wire test. Verify the solenoid failure. Replace the solenoid. Proceed to Test Step 8. NOT OK - The diagnostic code remains active. Proceed to Test Step 6.
6. Check Machine Harness For A Short To Ground A. The machine harness remains disconnected from the solenoid. B. Turn the key start switch and the disconnect switch OFF. C. Disconnect the harness connectors from the ECM (or switch panel). D. At the harness connector for ECM, measure the resistance between the solenoid signal contact and all ground contacts.	Each reading is greater than 5K Ω.	OK - Machine harness correct. Proceed to Test Step 8. NOT OK - 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 wire for the signal wire of the solenoid 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 8.
Begin Process For FMI 13 Troubleshooting HERE
7. Calibration A. Perform the calibration procedure for the solenoid. Refer to Testing and Adjusting, "Fill Time for the Transmission Clutch - Calibrate" for the correct calibration procedure.	The calibration procedure was performed successfully.	OK - The calibration procedure was performed successfully. Resume normal machine operation. Proceed to Test Step 8. NOT OK - The calibration was not successful. Repair: Repeat the calibration procedure for the solenoid. If the second calibration procedure is not successful, replace the solenoid. After solenoid replacement, refer to Testing and Adjusting, "Fill Time for the Transmission Clutch - Calibrate" for the correct calibration procedure. If the problem is still present after replacement and calibration of the new solenoid, the ECM may have failed. Prior to replacing an ECM, always contact the Technical Communicator at your dealership for possible consultation with Caterpillar. This consultation may greatly reduce repair time. If the cause of the diagnostic code is not found, replace the ECM. Refer to Testing and Adjusting, "Electronic Control Module (ECM) - Replace". Proceed to Test Step 8.
8. Check If The Diagnostic Code Remains A. Turn the key start switch and the disconnect switch ON. B. Clear all diagnostic codes. C. Operate the machine. D. Stop the machine and engage the parking brake. E. Check if diagnostic code for the solenoid is active.	Code for solenoid 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 Communication at your dealership for possible consultation with Caterpillar. This consultation may greatly reduce repair time. Follow the steps in Troubleshooting, "ECM - Replace" if the ECM needs to be replaced. STOP