KIT-DIFFERENTIAL BEARING 1408890 - Caterpillar

There are problems that could be reported with the PL522 or 523 system but the problems are not caused by the PL522 or 523 system. The description of the problem is described as a discrepancy of the service meter units. This section contains steps that are used to determine the possible cause. Check for active diagnostic codes for the PL522 or 523. Correct any diagnostic codes before proceeding. visually inspect the following items for damage: PL522 or 523 module, antenna and cables. Verify that there are no loose connections.The PL522 or 523 system depends on several communication links in order to transfer data from the machine to the office. The following procedures assume that these communication links are operating properly. The proper communication links are listed below:
The network for Cellular communications is operational in the geographic area of concern. The network is operational when messages can be sent to VisionLink.
The PL522 or 523 system is correctly configured to communicate on the network for Cellular communications.
The worldwide network of Caterpillars computers is passing messages to software for the Caterpillar VisionLink web application.
The VisionLink web Application is configured properly and the software is functioning.The PL522 or 523 modules should not be replaced without verifying that these issues have been investigated. Contact your Caterpillar Technical Communicator for aid in resolving these issues.Note: The Service Meter Hours that are reported by the PL522 and 523 modules should approximately match the machine operating hours.Test Step 1. ACCESS THE PL522 AND 523 THROUGH THE CAT ET SERVICE TOOL.
Connect the Cat ET service tool to the machine.
Verify that the ECM (VIMS Main Module) is present. Expected Result:The ECM (VIMS Main Module) is present.Results:
OK - The ECM (VIMS Main Module) is present. Proceed to Test Step 2.
NOT OK - The ECM (VIMS Main Module) is not present in the screen for Cat ET. Repair: Verify that the wiring for the PL522 or 523 has been installed correctly. Check the wiring with a multimeter. If the ECM ( VIMS Main Module) is not available, refer to Systems Operation, Troubleshooting, Testing and Adjusting, "Electronic Service Tool Does Not Communicate with ECM".STOPTest Step 2. VERIFY THAT THE PL522 or 523 MODULE IS CONFIGURED PROPERLY.
Go to the "Information" pull-down menu.
Select "Synchronize Service Meter Hours".
If PL522 or 523 is not the master ECM, verify that the "VIMS Main Module SMH" matches the SMH of the master ECM. If PL522 or 523 is the master ECM, verify that the PL522 or 523 SMH matches the machine service meter units. Expected Result:The hours are within 1%.Results:
OK - The hours are within 1%. The hours are synchronized. The PL522 or 523 is operating correctly.STOP
NOT OK - The hours are not within 1%. In a PL522 or 523 system using sync-clock where PL522 or 523 is not the master ECM, the PL522 or 523 module will automatically sync to the master ECM hours if the difference is not greater than 50 hours. If the difference is greater than 50 hours, a diagnostic will be generated