CROWN AS-PISTON 1360626 - Caterpillar

Illustration 1 g03839859The diagnostic code is recorded when the VIMSTM 3G Main ECM does not receive expected information from the Power Train ECM. The information was not received at the correct rate. The information is transmitted through the Cat® data-link.System Response:This failure results in events that are logged against the Power Train ECM that cannot be explained. The VIMS 3G Main ECM cannot communicate with the Power Train ECM or the Power Train 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 software for each ECM
The part number for each ECMNote: Consult your Caterpillar dealer for the correct part numbers of the software.Expected Result:All of the part numbers are correct.Results:
Yes - All of the part numbers are correct. Proceed to Step 2.
NO - One or more of the part numbers are not correctRepair: Replace the incorrect ECM with an ECM that has the correct part number. Install the correct software. Refer to Troubleshooting, Testing and Adjusting, "Electronic Control Module (ECM) - Replace" and Troubleshooting, Testing and Adjusting, "Electronic Control Module (ECM) - Flash Program"STOPTest Step 2. INSPECT THE HARNESS CONNECTIONS
Turn the disconnect switch and key start 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 corrosionResults:
YES - The machine harness connectors are tight and free of corrosion. Proceed to Step 3
NO - The machine harness connectors are in need of repair.Repair: Repair the machine harness or replace the machine harness.STOPTest Step 3. CHECK THE MACHINE HARNESS FOR SHORT TO GROUND
The disconnect switch and key start switch remain in the OFF position.
Disconnect the machine harness connectors from all ECMs that use the CAT Data Link.
Measure the resistance between frame ground and VIMS Main ECM contacts 50 (wire F711-GN(Green)) and 34 (wire F712-GY(Grey)). Expected Result:The resistance is high.Results:
YES - The resistance is high. The resistance is correct. Proceed to Test Step 4.
NO - The resistance is low. There is a short between frame ground and the Cat data link circuit.Repair: Repair or replace harness.STOPTest Step 4. CHECK FOR OPEN CIRCUIT
Verify that the disconnect switch is OFF.
Verify that all the ECMs on the Cat data link remain disconnected from the harness.
Check the continuity of