627H Wheel Tractor-Scraper Power Train Electronic Control System - Scraper Caterpillar

Illustration 1	g02558098
SAE J1939 (CAN) Datalink circuit confections

A CID 0967 FMI 09 is recorded when the Scraper Transmission ECM receives information about the harness code from the operator Monitoring System. The information indicates that the "Serial Number" for the machine has changed during machine operation. That type of information, received during machine operations, cannot be correct.

Probable causes for the diagnostic are:

• Incorrect software, or hardware, Part Numbers.

• Poor machine harness electrical connections.r

• A SAE J1939 Datalink circuit shorted to ground.

• A SAE J1939 Datalink circuit shorted to +Battery.

• Open SAE J1939 Datalink circuit.

Note: Poor connections are often the cause of a problem in electrical circuits. Before performing this procedure, inspect all the machine harnesses and connectors involved in the circuit. Make sure to verify that all of the connections in the circuit are clean, secure, and in good condition. Correct any problems found with any of the connections. Verify the diagnostic code CID 0967 FMI 09 is still active, before continuing with this procedure.

Note: This test procedure may create other diagnostic codes. Ignore all those created diagnostic codes now, but clear those codes after the cause for the original diagnostic code has been corrected.

Test Step 1. VERIFY HARDWARE AND SOFTWARE PART NUMBERS.

1. Verify the "Part Number" is correct for:
   • Scraper Transmission ECM Software.

   • Scraper Transmission ECM.

   • Cab Monitoring System Software.

   • Cab Monitoring System module.

Expected Result:

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

Results:

• YES - All "Part Number"s are correct. Go to Test Step 2.

• NO - All of the part numbers are NOT correct.

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

  Go to test step 8.

Test Step 2. 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 other related, and active, diagnostic codes are present.

Expected Result:

No other related, and active, diagnostic codes are present.

Results:

• YES - No other related active diagnostic codes are present, but CID 0967 FMI 09 is still active. Go to test step 4.

• NO - Other related active diagnostic codes are present, and CID 0967 FMI 09 is still active. Go to test step 3.

Test Step 3. CLEAR ALL ACTIVE RELATED DIAGNOSTIC CODES.

1. Perform all required Test Procedures to clear all other related, active diagnostic codes.

Expected Result:

All related active diagnostic codes are cleared, and CID 0967 FMI 09 is no longer active.

Results:

• YES - All other related active diagnostic codes are cleared, and CID 0967 FMI 09 is no longer active.

  Repair: The diagnostic codes do not exist at this time. Return the machine to normal operations.

  STOP

• NO - All other related active diagnostic codes are cleared, but CID 0967 FMI 09 is still active. Go to test step 4.

Test Step 4. INSPECT THE HARNESS CONNECTIONS.

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

2. Inspect the connections of the machine harness that are related to the SAE J1939 Datalink.

3. Make sure that connectors are clean and tight.

Expected Result:

The machine harness is correct.

Results:

• YES - The machine harness is correct. Go to Test Step 5.

• NO - The machine harness is not correct.

  Repair: Repair or replace the machine harness.

  Go to Test Step 8

Test Step 5. CHECK FOR A SHORT TO GROUND.

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

2. Disconnect the machine harness from all electronic control modules that use the SAE J1939 Datalink.

3. At the Main Display module harness connector, measure resistance from the SAE J1939 Datalink contacts 11 and 12 to all other contacts on the connector. Repeat the SAE J1939 Datalink contacts resistance measurements, but to frame ground this time.

Expected Result:

All resistances are more than 5000 ohms.

Results:

• YES - All resistances are more than 5000 ohms. The SAE J1939 Datalink circuits are correct. Go to Test Step 6

• NO - A resistance measured less than 5000 ohms. The SAE J1939 Datalink harness has failed.

  Repair: Repair or replace the harness.

  Go to Test Step 8

Test Step 6. CHECK FOR A SHORT CIRCUIT 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 Main Display module harness connector, measure resistance from SAE J1939 Datalink contacts 11 and 12 to all other contacts in the connector. Make sure, specially, to check resistance to the +Battery contact, 1, in the connector.

Expected Result:

All resistances are more than 5000 ohms.

Results:

• YES - All resistances are more than 5000 ohms. The SAE J1939 Datalink circuits are correct. Go to Test Step 7.

• NO - A resistance measured less than 5000 ohms. The SAE J1939 Datalink harness has failed.

  Repair: There is a short to +Battery in the SAE J1939 Datalink harness. Repair or replace the harness.

  Go to Test Step 8

Test Step 7. CHECK FOR AN OPEN HARNESS.

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. Check the continuity of the SAE J1939 Datalink circuit in the machine harness.

4. At the operator Monitoring System display harness connector: Measure resistance from SAE J1939 Datalink contacts 11 and 12 to all corresponding SAE J1939 Datalink contacts on all related ECM modules on the machine.

Expected Result:

All resistances are less than 5 ohms.

Results:

• YES - All resistances are less than 5 ohms. The SAE J1939 Datalink circuit is correct. Go to Test Step 8

• NO - A resistance measurement is greater than 5 ohms. The SAE J1939 Datalink harness has failed.

  Repair: The SAE J1939 Datalink circuit has an open circuit in the machine harness. Repair or replace the harness.

  Go to Test Step 8

Test Step 8. CHECK IF THE DIAGNOSTIC CODE REMAINS.

1. Reconnect all harness connectors. Make sure that the connectors are clean and fully seated. Observe that the clips on each connector are securely fastened.

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

3. Operate the machine.

4. Clear all inactive diagnostic codes.

5. Check the status of the CID 0967 FMI 09.

Expected Result:

The CID 0826 FMI 03 is no longer active.

Results:

• YES - The CID 0967 FMI 09 is no longer active. The diagnostic code does not exist at this time. Return machine to normal operationSTOP

• NO - The CID 0967 FMI 09 code is still active. The cause for the code has not been corrected.

  Repair: If you have not inspected the harness connectors in a previous Test Step, do that now. Clean the contacts of the harness connectors. Check the wires for damage to the insulation caused by excessive heat, battery acid, or chafing.Perform a 45 N (10 lb.) pull test on each of the wires that are associated with the sensor circuit.Perform a "wiggle test" on the sensor circuit of the machine wiring harness, using the Caterpillar Electronic Technician service tool. The "wiggle test" can be used to detect open or shorted connections in the machine wiring harness.Reconnect all harness connectors. Make sure that the connectors are fully seated. Observe that the clips for each connector are securely fastened. Perform Test Step 8 again. If the problem has NOT been found, and the original code is still active, the Scraper Transmission ECM may have failed.Prior to replacing an ECM, always contact your Dealership Technical Communicator for possible consultation with Caterpillar, or with the Dealer Solutions Network. This consultation may greatly reduce repair time. If the ECM needs to be replaced, see Testing and Adjusting, "Electronic Control Module (ECM) - Replace".

  STOP