ROD AS 2767479 - Caterpillar

Illustration 1 g01821054
Data Link Connection
Illustration 2 g01816865
Schematic of the Cat data link circuit
The purpose of the "Advisor" is to display pertinent information about the machine to the operator and the service personnel. The Advisor also monitors the systems of the machine. This information includes, but is not limited to, the parameters of the machine, the system configuration of the machine, and details of the diagnostic events of the machine. The "Advisor" obtains this information over the Cat data link.This diagnostic code is associated with the "Advisor" module. The display will depend on the configuration of the machine.Note: Refer to the electrical system schematic for your machine in order to verify the Cat data link connections.This diagnostic code is recorded when the Transmission ECM does not receive expected information from the "Advisor" module for a period of more than five seconds.System Response:This diagnostic code results in events that are logged against an ECM that can not be explained directly. The Transmission ECM cannot communicate with the "Advisor" module or the Transmission ECM appears to communicate intermittently.Test Step 1. VERIFY THE HARDWARE AND THE SOFTWARE PART NUMBERS.
Verify that the following information is correct:
The part number of the flash software for the "Advisor" module
The part number of the "Advisor" module
The part number of the flash software for the Transmission ECM
The part number of the Transmission ECMNote: Consult the Business Unit that produces the product for the correct part numbers of the flash software.Expected Result:All the part numbers are correct.Results:
OK - All the part numbers are correct. Proceed to Test Step 2.
NOT OK - All the part numbers are NOT correct. Repair: The ECM has the wrong part number or the incorrect software is installed. Replace the ECM with a module that has the correct part number. Flash the correct software. See the Testing and Adjusting, "Electronic Control Module (ECM) - Flash Program" section of this manual.STOPTest Step 2. INSPECT THE HARNESS CONNECTIONS.
Turn the disconnect switch to the OFF position.
Inspect all harness connections that are related to the Cat data link. Make sure that the connectors are clean and tight.
Check the connectors for proper mating. Ensure that all the seals are present and in place.
Check the harness for signs of damage or abrasion.
Check the wires at the connector. Ensure that the wires are secured tightly into the connector. Take care not to pull the wire out of the connector.
Check the exposed wires at the connectors for nicks or signs of abrasion.
Check for moisture inside the connector.
Check the connectors for dirty contacts or corroded contacts.
Check each pin and each socket of the machine harness connectors. Ensure that the contacts are properly installed. The contacts should mate correctly when the two pieces of the connector are placed together. Expected Result:The machine harness connectors are tight and free of corrosion. Results:
OK - The machine harness connectors are tight and free of corrosion. Proceed to Test Step 3.
NOT OK - The machine harness connectors are in need of repair.Repair: Repair the machine harness or replace the machine