EYE 4656217 - Caterpillar

Illustration 1 g01261708
Partial Electrical Schematic for Cat DatalinkThis diagnostic code is recorded when the implement control ECM (Grade Control) is unable to communicate with the machine's power train ECM through the Cat Datalink. This diagnostic code is recorded when the implement control (Grade Control) ECM does not receive expected information. The possible causes of this diagnostic code are listed below. The causes are listed in order of probability:
Poor electrical connection at a machine harness connector
The circuit for the Cat Datalink in the machine harness is shorted to ground.
The circuit for the Cat Datalink in the machine harness is shorted to the +battery.
The circuit for the Cat Datalink in the machine harness is open.
The circuits for the CDL+ and CDL- are shorted together.System Response:This failure results in events that are logged against the implement control (Grade Control) ECM in order to determine the allowed automatic blade control mode. The machines power train control ECM cannot communicate with the implement control (Grade Control) ECM. The communication may be intermittent. Prior to performing this procedure, check for an active diagnostic code of CID 0248 FMI 09. If this diagnostic code is present exit this procedure and perform the diagnostic procedure for CID 0248 FMI 09.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 implement (Grade Control) ECM
The part number of the machine's implement (Grade Control) ECM
The part number of the flash software for the machine's power train ECM
The part number of the machine's power train ECMNote: Contact your dealership's technical communicator for a possible consultation with Caterpillar.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 installed machine's power train ECM or the implement (Grade Control) ECM has the wrong part number or the incorrect software is installed. Replace the machine's incorrect power train ECM or implement (Grade Control) ECM vwith a module that has the correct part number. Flash the correct software. See the Testing and Adjusting, "Module - 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 Datalink. 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