TUBE AS 2185668 - Caterpillar

Procedure for the Calibration of the Torque Converter Pedal Position Sensor for the Impeller Clutch
Personal injury or death can result from sudden machine movement.Sudden movement of the machine can cause injury to persons on or near the machine.Prevent possible injury by performing the procedure that follows before working on the machine.
Park the machine on a smooth, level surface.
Shift the transmission direction control switch to the NEUTRAL position.
Lower the bucket or the work tool to the ground.
Engage the parking brake.
Place blocks in front of the wheels and behind the wheels.
Install the steering frame lock.
Shut off the engine.Note: This calibration procedure can be performed without a running engine.
Turn the key start switch and the disconnect switch to the ON position.
Allow only authorized personnel on the machine. Keep unauthorized personnel off the machine and in clear sight of the operator.
Table 1
Required Tools    
Part Number     Description     Quantity    
139-4166     Data Link Cable     1    
7X-1425     Cable     1    
4C-6805     Adapter     1    
171-4400     Communication Adapter Tool     1    The software program that will be used for this test procedure is the Caterpillar Electronic Technician (ET). The Caterpillar Electronic Technician is a software program that can be used on an IBM-compatible personal computer.Reference: For more information about the use of Electronic Technician, refer to Testing and Adjusting, "Using Caterpillar Electronic Technician (ET) to Determine Diagnostic Codes" for the machine that is being serviced.
Open the software program (ET). Select the "Transmission 990 II" menu item or the "Transmission 844" menu item.
Select the "Service" menu in order to begin the calibration procedure. Then select "Calibrations". A second menu will be displayed. Select "Torque Converter Pedal Calibration" from the second menu.
The next screen is the initial calibration screen. Once "Torque Converter Pedal Calibration" has been selected, the screen displays the incremental instructions for calibration. The top display area displays status parameters that are monitored during the calibration. The middle display area displays information about the status of the calibration. The bottom display area displays incremental instructions for the calibration. The step that currently needs to be carried out is in bold text. All other steps are displayed in gray text.
Press the "Next>" button in order to start the calibration. The "Next>" button is disabled, until the current step has been successfully completed. A check will be placed in the box that is left of the step, after the current step is complete. After the successful completion of a step, press the "Next>" button in order to begin the following step. Continue this process in order to complete the calibration procedure.
The ECM detects possible error messages during the calibration. When an error is detected the ECM will stop the calibration. The error message will be displayed in the middle display area. Refer to Table 2 for possible error messages.
Table 2
Torque Converter Pedal Sensor Calibration Error Messages    
Torque Converter Pedal Depressed Too High    
Torque Converter Pedal Depressed