VALVE-RELIEF 3278917 - Caterpillar

Illustration 1 g02714481
Schematic of the Cat Data Link for770G, 772G and 777G Off-Highway Trucks, 773G and 775G Quarry Trucks
Illustration 2 g03859095
Schematic of the Cat Data Link for 777E and 773E Off-Highway Trucks
This diagnostic code is recorded when the Advisor ECM has an abnormal update rate with the VIMS 3G Application ECM through the Cat data link.Note: Cat ET will report a CID 1089 code as a VIMS Analysis control module fault. In a VIMS 3G system the VIMS 3G Application ECM is the ECM that has created the fault.System Response:This failure results in events that are logged against the VIMS 3G Application ECM that cannot be explained directly. The Advisor ECM cannot communicate with the VIMS 3G Application ECM or the VIMS 3G Application 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 Advisor ECM onboard software
The part number of the flash software for the VIMS 3G Application ECM
The part number of the Advisor ECM
The part number of the VIMS 3G Application ECMNote: Consult the Business Unit that produces the product for the correct part numbers of the configuration software.Expected Result:All part numbers are correct.Results:
OK - All part numbers are correct. Proceed to Test Step 2.
NOT OK - All part numbers are NOT correct.Repair: The installed Advisor ECM or the VIMS 3G Application ECM has the wrong part number or the incorrect configuration software is installed. Replace the incorrect Advisor ECM or the VIMS 3G Application ECM with an ECM that has the correct part number. Refer to Service Manual, "Electronic Control Module (ECM) - Replace". Flash the correct configuration software. Refer to Service Manual, "Electronic Control Module (ECM) - Flash Program".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 harness.STOPTest Step 3. CHECK FOR SHORTS TO GROUND
The disconnect switch remains in the OFF position.
Disconnect all ECM from the Cat Data Link.
At the machine harness for