BEARING-BRACE 6W0240 - Caterpillar

Conditions Which Generate This Code:
Illustration 1 g01399075
Schematic of the Driveline Power Take-Off (DPTO) when engagedThis diagnostic trouble code is associated with the driveline PTO switch. The FMI 2 recorded when the ECU reads the signal from the switch and the ECU determines that the signal is erratic, intermittent, or incorrect.The possible causes of this diagnostic trouble code are listed:
The DPTO switch has failed in the closed position and the driveline is engaged.
J2-54 is shorted to ground.
The ECU has failed.The ECU failing is unlikely.Note: The following test procedure may create other diagnostic trouble codes. Ignore these created diagnostic trouble codes and clear the diagnostic trouble codes when the original diagnostic trouble code has been corrected. Ensure that the diagnostic trouble code of SPN 3463 FMI 2 is active before performing this procedure.Note: Use a digital multimeter for the measurements in this procedure.System Response:The amber warning lamp is illuminated. The pump may not engage correctly and the machine may be allowed to move.Test Step 1. VERIFY THE SOFTWARE VERSIONNote: Check and record the latest software version for the transmission electronic controls from SIS.
Verify that the latest version of software has been loaded to the ECU.Expected Result:All of the software is current.Results:
OK - All of the software is current. Proceed to Test Step 2.
NOT OK - There is a more recent software release that is available.Repair: Flash all controls with the latest software release. Refer to Testing and Adjusting, "Electronic Control Unit - Flash Program" for more information.STOPTest Step 2. CHECK THE HARNESS.
Turn the key start switch to the OFF position.
Inspect the harness.
Check for the proper mating.
Check the exposed wires for nicks and abrasions.
Check for moisture, dirt, or corrosion.
Check the pin/socket for a proper fit.
Disconnect the machine harness connectors from the Transmission ECM.
Place the switch in the open or disengaged position.
At the machine harness connector, measure the resistance from connector contact J2-54 to ground. Expected Result:The resistance should be more than 5000 ohms.Results:
OK - The resistance is more than 5000 ohms. The machine harness is correct. Proceed to test step 3.
NOT OK - The resistance is less