INSULATOR 1434456 - Caterpillar

Illustration 1 g01209930
Cat Data Link connections
This diagnostic code is associated with the engine ECM.Note: The illustration for the Cat Data Link connections may not represent the connections for all components on all of the machines covered by this manual. 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 brake ECM does not receive expected information from the engine ECM 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 brake ECM cannot communicate with the engine ECM or the ECM appears to communicate intermittently. 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 engine ECM
The part number of the engine ECM
The part number of the flash software for the brake ECM
The part number of the brake 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 and/or the connector or replace the machine harness and/or the connector. STOPTest Step 3. CHECK FOR SHORTS TO GROUND
The disconnect switch remains in the OFF position.
Disconnect the