D250E Series II, D300E Series II, D350E Series II and D400E Series II Articulated Trucks Power Train Electronic Control System Caterpillar

This diagnostic code is recorded when the Power Train Electronic Control Module (ECM) cannot communicate with the Caterpillar Monitoring System via the CAT Data Link. The update rate from the ECM is not correct.

The CAT Data Link is an input and an output of all modules. The CAT Data Link is designed to enable communications with all modules and service tools. The CAT Data Link is not a visible component. The data link consists of internal control circuits and the connecting harness wiring.

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

1. VERIFY THE HARDWARE AND THE SOFTWARE PART NUMBERS.

   1. Verify whether the following part numbers are correct:
      • Software part number for the power train ECM

      • Software part number for the monitoring system

      Expected Result: Consult the Business Unit that is producing the product for the correct configuration for the machine. All part numbers are correct.

      Results:

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

      • NOT OK - All part numbers are NOT correct. One of the 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.

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 3.

      • NOT OK - The machine harness connectors require repair. Repair the harness or replace the harness. Verify that the repair corrects the problem. STOP.

3. CHECK FOR ADDITIONAL RELATED DIAGNOSTIC CODES.

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

   2. Turn the disconnect switch and the key start switch to the ON position.

   3. Acknowledge any active 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 4.

      • NOT OK - Other related diagnostic codes are present. Exit this procedure and perform the other related diagnostic codes. Verify that the other related diagnostic codes are NOT present. Observe the status of CID 0967 FMI 09. If the CID 0967 FMI 09 remains active, perform CID 0967 FMI 09 again. STOP.

4. CHECK FOR SHORTS TO GROUND.

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

   2. Disconnect the machine harness from all electronic control modules that use the CAT Data Link.

   3. At the machine harness connector for the power train ECM, measure the resistance from frame ground to all other contacts of the data link. See the schematic for the machine that is being serviced.

      Expected Result: The resistance is greater than 5000 ohms.

      Results:

      • OK - The resistance is greater than 5000 ohms. The harness circuit is correct. Proceed to 5.

      • NOT OK - The resistance is NOT greater than 5000 ohms. The machine harness is faulty. There is a short between frame ground and the data link circuit in the machine harness. Repair the machine harness or replace the machine harness. Verify that the repair corrects the problem. STOP.

5. CHECK FOR A SHORT TO +BATTERY.

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

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

   3. At the machine harness connectors for the power train ECM, measure the resistance from contacts J1-3 and J1-9 to all possible sources of voltage. The possible sources of voltage are connector contacts: J1-1 (wire 126-PK), J1-4 (wire A958-WH), J1-6 (wire 126-PK), J1-8 (wire 306-GN), J1-10 (wire 728-BU), J1-11 (wire 705-PK), J1-12 (703-BU), J1-17 (wire 904-BU), J1-18 (wire 704-GY), J2-1 (wire K746-PK), J2-2 (wire 368-OR), J2-7 (wire G870-GY), J2-8 (wire K745-YL), J2-13 (wire G705-GN), J2-19 (wire G704-YL) and J2-37 (wire 321-BR).

      Expected Result: The resistance is greater than 5000 ohms for each measurement.

      Results:

      • OK - The resistance is greater than 5000 ohms for each measurement. Proceed to 6.

      • NOT OK - The resistance is less than 5000 ohms. The machine harness is faulty. There is a short between the +battery and the data link circuit in the machine harness. Repair the machine harness or replace the machine harness. Verify that the repair corrects the problem. STOP.

6. CHECK FOR AN OPEN HARNESS.

   1. The key start switch and the disconnect switch remain 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:
      • Measure the resistance from contact J1-3 (wire 892-BR) of the power train ECM to the corresponding connector contacts of all other electronic control modules. See the schematic for the machine that is being serviced.

      • Measure the resistance from contact J1-9 (wire 893-GN) of the power train ECM to the corresponding connector contacts of all other electronic control modules. See the schematic for the machine that is being serviced.

      Expected Result: The resistance measures less than 5 ohms.

      Results:

      • OK - The resistance measures less than 5 ohms. The data link circuit is correct. It is unlikely that the ECM is faulty. Exit this procedure and perform this diagnostic code again. If the cause of the diagnostic code is not found, replace the power train ECM. See Testing And Adjusting, "Electronic Control Module (ECM) - Replace". STOP.

      • NOT OK - The resistance measures greater than 5 ohms. The machine harness is faulty. 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.