Manuals & Software
ET 2023A - Caterpillar Electronic Technician
Instructions
In this fig. shows the tools needed by Cat ET to communicate with the ECM
File/Disconnect F8
There are two data link icons on the toolbar, one for connecting (left icon) and one for disconnecting (right). When you select the shutdown function, the main part of the screen is closed.
When you place the cursor on any icon on the toolbar, a tooltip (description of the function) is displayed.
The active diagnostic codes screen is opened using the icon in fig., either by pressing the F3 key on the keyboard or using the drop-down menu:
Diagnostics/Active Diagnostic Codes
To display the screen of registered diagnostic codes, you must click on the icon shown in the figure, either the F4 key on the keyboard or the drop-down menu:
Diagnostics/Logged Diagnostic Codes
Diagnostics/Events/Logged Events
Information/Status
Screen in fig. is a new group screen.
In fig. the created screen is shown, with the internal combustion engine running
Service/Configuration
Information/Data Log/Recorder or Viewer
Information/Real Time Graphing
Information/Real Time Graphing
Diagnostics/Diagnostic Tests
From the diagnostic tests menu you can also access the test:
If the malfunction is intermittent, as evidenced by the presence of a corresponding error in the Logged Diagnostic Codes list , but does not appear during the test, a loose connection may be the likely cause.
There are two ways to perform the Injector Solenoid Test:
The first method, shown in fig. - sequential automatic testing of each electromagnet. Click on the Test All button or press the A key on your keyboard. For example, in fig. during the test, a malfunction of the electromagnet of the 7th cylinder is displayed - the circuit is open.
The second way to check the injector solenoid is to check each cylinder separately. Having selected the intended cylinder, click on the Test button or press the E key on the keyboard. When moving the wires and wiggling the connector, the electromagnet may turn on repeatedly. If there is a malfunction, the screen will display an open circuit or short circuit.
This test is usually called the "click test" because of the characteristic sound of the injector solenoid operating.
However, the presence or absence of sound during the test, in itself, is not a convincing sign of an injector malfunction. However, when checking fuel system injectors with HEUI unit injectors (hydraulic electronic unit injectors), an inoperative solenoid that does not make any sounds may indicate a stuck poppet valve. This may be caused by improper installation or removal of the injector.
Performing a Cylinder Cutout Test
Diagnostics/Diagnostic Tests/Cylinder Cutout Test
Service/Calibrations/Timing Calibration
Timing calibration
Click the Continue button at the bottom left of the calibration screen.
This operation does not require setting the engine speed. This action is performed automatically by the Cat ET software . The engine speed is set to 800 rpm. If a deviation is detected, for example by 10 or more, the calibration is stopped.
Calibration is necessary when replacing speed sensors or after adjusting injection timing. If the ECM is replaced or its programming is changed, the calibration results are written to a new electronic control unit with different parameters.
Pressure sensor calibration
Using the same drop-down menu, select:
Service/Calibrations/Pressure Sensor Calibration
Unlike timing calibration, calibrating the pressure sensor is performed with the engine not running .
The atmospheric air pressure sensor is used as a starting device for adjusting other sensors. The readings of other sensors that are not consistent with the output readings of the atmospheric air pressure sensor must be adjusted (within acceptable values) so that agree with him.
To begin calibration, click the Start button or press the A key on your keyboard.
Injector codes calibration
To access injector calibration, use the sequence in the drop-down menu:
Service/Calibrations/Injector Codes Calibration
The purpose of injector calibration is to ensure more accurate fuel delivery and synchronized operation of the cylinders. The injectors are fuel tested and calibrated at the factory. All minor deviations in fuel consumption are represented by codes written on the top of the injector. These codes programmed in the electronic control unit.
If injectors are replaced or rearranged for any reason, the corresponding injectors must be calibrated to ensure there is no imbalance between the cylinders.
The numbers shown to the right of the injectors are the default values that are used if no others have been programmed. This screen transfers values to the ECM. This process ensures a more even supply of fuel to each cylinder and balances power throughout the engine.
To enter the code:
Injection Actuation Pressure Test
Cat ET in fig. connected to the 3408E engine with HEUI fuel system, shown at the bottom right of the screen.
Checking the oil pressure in the HEUI system allows the user to override the automatic control system of the electronic control unit and manually change the pressure from minimum to maximum.
The check is carried out using the following drop-down menu:
Diagnostics/Diagnostic Tests/Injection Actuation Pressure Test
This test is designed to perform a functional test of all hydraulic devices such as: pump, compensator block, HEUI oil pressure control valve and HEUI oil pressure sensor.
The pressure can be reduced with the Step Down button to the minimum allowable by adjusting the compensator valve, the value of which is approximately 20% of the injection switching current.
Using the Step Up button , the pressure can be increased to maximum when the current in the oil pressure control valve in the HEUI system is approximately 50%.
These values are variable depending on parasitic load and oil viscosity.
The Step Up function turns off when the pressure reaches its maximum limit. Also, the Step Down function does not allow the pressure to drop below the pressure set by the spring in the compensator.
Override Parameters
This screen turns on circuits such as illuminated lamp circuits for troubleshooting purposes. This screen is called up using the following
drop down menu:
Diagnostics/Diagnostic Tests/Override Parameters
In this case, in fig.
In the event of an open or short circuit in one of these circuits, the system can be turned on or off to facilitate troubleshooting.
Wiggle Test Warning
The Wiggle Test feature allows the user to determine the fault of intermittently inoperative wiring by identifying a parameter that is out of bounds during a physical test of wires, sensors, connectors, etc.
This check is carried out using the drop-down menu:
Diagnostics/Diagnostic Tests/Wiggle Test
A warning window will first appear. If all conditions meet the requirements, click OK. If all conditions do not meet the requirements, complete them and continue checking or click Cancel .
Wiggle Test
In the Description column - the name of the parameter. In the Value column - the value of the parameter. In the Unit column - units of measurement.
If there are more options to view than shown in the display area, there is a vertical scroll on the right side of the screen to view the remaining options.
The Wiggle Test screen contains the following buttons:
ET 2023A - Caterpillar Electronic Technician is available at the link
Prepared by the team