BOLT 8T7338 - Caterpillar

When the Cat Telematics system develops a "Telematics Unit Will Not Communicate With User Interface Over Customer LAN"", certain steps can be taken before traveling to the customer site. Follow the steps from the "Off-Site Diagnostics" in order to help determine the fault before traveling to the customer site.Off-Site Diagnostics
Note: Some steps of the "Off-Site Diagnostics" sections are dependent on the customer being on site.
Determine if the customer has a cellular radio connected to the Cat Telematics system with a good connection.
If the customer does not have a cellular radio connected or does not have a good cellular connection, refer to Special Instruction, REHS1234, "How to set up telematics unit on Customer LAN".
If the customer has a cellular radio connected and a good cellular connection, proceed to Step 2.
Perform the "Remote Connectivity Test" located in the user interface under "Service Tools".
If the remote connectivity test is not successful, refer to the "User Interface Does Not Communicate" section of this manual
If the "Remote Connectivity Test" is successful, refer to the "How to Set Up a Telematics Unit on Customer LAN" section of this manual. If the problem persists after following the "How to Set Up a Telematics Unit on Customer LAN" section of this manual, proceed to "On-Site Diagnostics".On-Site Diagnostics
Note: Before any on-site diagnostics are performed all diagnostic procedures from the "Off-Site Diagnostics" section should have been previously performed.
Connect the 317-7484 Communication Adapter Gp to the asset and open CAT ET .
Service tool does not connect. Refer to "Electronic Service Tool Does Not Communicate".
Service tool connects. Proceed to Step 2.
Check for any active or logged diagnostic codes.
If diagnostic codes are present, proceed to the diagnostic information for that specific code.
If diagnostic codes are not present, proceed to Step 3.
Connect the 305-5528 Cable As to the service port on the Cat Telematics control module and your laptop. Refer to "How to Connect to the Service Information Screen" section of this manual. Access the service information screen and check the "Ethernet Connection Status".
If there is no connection, refer to the "How to Set Up the Telematics Unit on Customer LAN" section of this manual.
If there is a connection, run the "LAN Network Test". Refer to the "How to Run a LAN Network Test" section of this manual.If the "LAN Network Test" passes return the asset to service. If the "LAN Network Test" does not pass contact the DSN.