Is the correct power mode activated?
The Machine ECM can activate two different power modes for machine operation. The power modes can be selected by the operator for machine operation. The two operator selectable power modes are the "Economy Mode" and the "Power Mode".
The Operator selects either the Economy Mode or the Power Mode using the Power Mode Button on the Soft Switch Panel (SSP).
When the ECM activates a power mode, the ECM will use the current output for the Main Pump Power Shift Solenoid and the Swing Pump Power Shift Solenoid to adjust the output of the main pump and the swing pump.
The ECM will supply electrical current to the Swing Pump Power Shift Solenoid based on the software map defined for each different machine model. The ECM will also factor in a "Swing Aggressiveness" offset parameter that can be configured by the operator. The parameter changes the speed at which the machine swing function will operate. The parameter can be configured using Cat ET or in the Monitor "Performance" menu. This parameter avoids the need to perform a calibration procedure for the swing pump.
The ECM will supply the electrical current to the Main Pump Power Shift Solenoid based on the software map defined for each different machine model. The amount of current is also impacted by the Cat ET calibration procedure that is performed on the main pump.
Is the Hydraulic Modulation Function active?
When the function is enabled, the ECM will use the selected Hydraulic Modulation setting to adjust the response of the implement hydraulics to input commands.
The Hydraulic Modulation Function allows the operator to select between three levels of hydraulic sensitivity. The three levels are Low, Medium, or High. The level of sensitivity can be selected from the Hydraulic Modulation menu in the Monitor.
Once the level of Hydraulic Modulation is selected, the Machine ECM communicates the correct output to the Implement ECM 2 on the J1939 Data Link. The Implement ECM 2 will execute the command to the Hydraulic Modulation Solenoid. The solenoid will allow the hydraulic oil flow to be adjusted in order to change the sensitivity of the tool movement.
Before performing the following procedure, verify that the following operator selectable operating parameters are correct.
- The Power Mode is selected on the SSP and the corresponding LED Indicator ON steady. (A flashing indicator means the ECM is waiting for machine conditions to be correct before activating the mode.)
- The Swing Aggressiveness offset is set to a value that permits acceptable swing performance.
- Disable the Hydraulic Modulation function with the button on the left joystick.
If the hydraulic operation is still poor after the conditions that are listed have been met, perform the following steps.
| Troubleshooting Test Steps | Expected Result | Results |
|---|---|---|
| 1. Check Machine Conditions The following machine conditions will cause the ECM to activate the Economy Power Mode. 1. When the ECM has activated a diagnostic code for one of the power shift solenoids, the ECM will activate the Economy Mode. 2. When the Backup Mode is active, the ECM will activate the Economy Mode and implement hydraulic will be disabled. 3. When an error event EID 0561 (Low Hydraulic Oil Temperature) is activated or if the Hydraulic Oil Temperature Sensor has an active fault, the ECM will activate the Economy Mode. 4. When an error event EID 0878 (High Hydraulic Oil Temperature) is activated, the ECM will activate the Economy Mode. 5. When an error event EID 0236 (Hydraulic Oil Filter Plugged) is activated or an error event EID 0391 (Air Filter Plugged) is activated, the ECM will activate the Economy Mode. 6. When the Hydraulic Modulation Function is enabled, the ECM will activate the Economy Mode for the swing pump. 7. Economy Power Mode is now the default mode at key on irrespective of what the mode was previously set to. |
One or more of the listed machine conditions is present. |
OK - One or more of the listed machine conditions is present. Repair: The ECM will not activate the Power Mode until the active machine condition causing the problem is cleared. Proceed to Test Step 2. NOT OK - None of the listed machine conditions are active and no other conditions are present that would cause the ECM to activate the Economy Mode. Proceed to Test Step 2. |
| 2. Perform Main Pump Testing A. Test that the maximum engine and maximum main pump power are correct. Refer to Testing and Adjusting, UENR5282, "Main Pump - Test". If the test values do not meet proper specifications, further testing will be needed. Follow all recommendations to help determine the root cause of the poor hydraulic response symptom. |
Hydraulic testing and adjustments have been performed and have improved the hydraulic operation of the machine. |
OK - Hydraulic testing has been performed and has resulted in improved response of the machine implements STOP NOT OK - Hydraulic testing has been performed. The hydraulic operation of the machine is still not correct. Repair: The ECM and the electrical components appear to be operating correctly. The problem may be caused by the hydraulic components on the machine. Refer to the Service Manual for your machine and check documentation for the hydraulic operation of the machine. After hydraulic system repairs or adjustments are performed, perform any applicable tests or calibrations to ensure superior performance. After checking the operation of the hydraulic components on the machine and the problem is still present, flash the ECM with the latest version of software. Ensure that you have the latest version of software for your specific machine and ECM. Refer to the Testing and Adjusting, "Electronic Control Module (ECM) - Flash Program" section of this manual for the correct procedure. If the problem is still present after flashing the latest software to your ECM, contact the Technical Communicator at your dealership for consultation with Caterpillar. STOP |