993K Wheel Loader Vital Information Management System (VIMS) Caterpillar

Illustration 1	g01457829
Schematic of the CAT Data Link circuit

This diagnostic code is recorded when the VIMS ECM receives information from the Advisor module and this information is NOT correct.

Note: Other related diagnostic codes may cause this diagnostic code. Check for other related diagnostic codes.

System Response:

Information for the Advisor module is not available over the CAT data link.

Test Step 1. VERIFY THE HARDWARE AND THE SOFTWARE PART NUMBERS.

1. Verify whether the following part numbers are correct.
   • Software part number for the Advisor module

   • Software part number for the VIMS ECM

Expected Result:

Consult the Business Unit that is producing the product for the correct configuration for the machine.

Results:

• OK - All part numbers are correct. Proceed to Test Step 2.

• NOT OK - All of the part number are NOT correct.

  Repair: One of the above modules may have the wrong part number and/or the software configuration is NOT correct. See Testing and Adjusting, "Electronic Control Module (ECM) - Flash Program".

  STOP

Test Step 2. INSPECT THE HARNESS CONNECTIONS.

1. Turn the key start switch and the disconnect switch to the OFF position.

2. Inspect the harness connections that are related to the CAT data link. Make sure that the connectors are clean and tight.

3. Check the mating of the connector.

4. Check the wires at the connector.

5. Check each wire for nicks and/or signs of abrasion in the insulation.

6. Check for moisture at the connector.

7. Check for dirty contacts and/or corroded contacts.

8. Check each pin and check each socket.

Expected Result:

The machine harness connectors are tight and free of corrosion.

Results:

• OK - The machine harness connectors are tight and the connectors are free of corrosion. Proceed to Test Step 3.

• NOT OK - The machine harness connectors require repair.

  Repair: Repair the harness or replace the harness.

  STOP

Test Step 3. CHECK FOR ADDITIONAL RELATED DIAGNOSTIC CODES.

1. Ensure that all electronic control modules that use the CAT data link are connected.

2. The disconnect switch and the key start switch remain in the OFF position.

3. Acknowledge any diagnostic codes that are currently displayed on the message center.

4. Verify that NO related diagnostic codes are present.

Expected Result:

NO other diagnostic codes are present.

Results:

• OK - NO other related diagnostic codes are present. Proceed to Test Step 4.

• NOT OK - Other related diagnostic codes are present.

  Repair: Exit this procedure and perform the other related diagnostic codes. Verify that the other related diagnostic codes are NOT present. Observe the status of the CID 2448 FMI 02. If the CID 2448 FMI 02 remains, perform the diagnostic code procedure again.

  STOP

Test Step 4. CHECK FOR AN OPEN HARNESS.

1. The disconnect switch remains in the OFF position.

2. All related electronic control modules remain disconnected from the machine harness.

3. Check the continuity of the data link circuit in the machine harness.

4. Perform the following measurements:
   Show/hide table

   Table 1

   Module	Contact	Wire
   Advisor Module	9	892-BR
   VIMS ECM	J1-6	892-BR

   Show/hide table

   Table 2

   Module	Contact	Wire
   Advisor Module	8	893-GN
   VIMS ECM	J1-7	893-GN

Expected Result:

The resistance measures less than 5 ohms.

Results:

• OK - The resistance measures less than 5 ohms. The data link circuit is correct. The ECM may have failed.

  Repair: It is unlikely that the ECM has failed. Exit this procedure and perform this diagnostic code again. Replace the ECM if the cause of the diagnostic code is not found. See Testing and Adjusting, "Electronic Control Module (ECM) - Replace".

  STOP

• NOT OK - The resistance that is measured is greater than 5 ohms. The machine harness has failed.

  Repair: The data link circuit is open in the machine harness. Repair the machine harness or replace the machine harness. Verify that the repair eliminates the problem.

  STOP