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| Illustration 1 | g02693936 |
This diagnostic code is recorded when the Advisor does not receive expected information from the VIMS ECM. The possible causes of this diagnostic code are listed:
- The wires for the Cat Data Link to the VIMS ECM are open or the wires are shorted.
- The wrong software is installed on an ECM.
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 VIMS ECM
- The part number of the flash software for the Advisor
- The part number of the VIMS ECM
- The part number of the Advisor
Note: Consult your Caterpillar Dealer for the correct part numbers of the flash software.
Expected Result:
All of the part numbers are correct.
Results:
- OK - All of the part numbers are correct. Proceed to Test Step 2.
- NOT OK - All of the part numbers are not correct.
Repair: The installed VIMS ECM or the Advisor have the wrong part number or the incorrect flash software is installed. Replace the VIMS ECM or replace the Advisor that is incorrect. Replace the ECM with a module that has the correct part number. Flash the correct software. See Testing and Adjusting, "Module - Flash Program" for additional information.
STOP
Test 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 or replace the machine harness.
STOP
Test Step 3. CHECK FOR SHORTS
- The disconnect switch remains in the OFF position.
- Disconnect the machine harness connectors from all electronic control modules that use the Cat Data Link.
- At the harness connector for the Messenger, measure the resistance between connector contact 4 (wire 893-GN(Green)) and all of the contacts that are used in the machine harness connector for the Advisor. Perform the same measurements for connector contact 5 (wire 892-BR(Brown)).
Expected Result:
Each resistance measurement is greater than 5000 ohms.
Results:
- OK - Each of the resistance measurements is greater than 5000 ohms. The harness circuit resistance is correct. Proceed to Test Step 4.
- NOT OK - One of the resistance measurements is less than 5000 ohms. The machine harness has failed.
Repair: There is a short between contact 8 (wire 893-GN(Green)) or contact 9 (wire 892-BR(Brown)) of the Cat Data Link and the circuit with the low resistance measurement. Repair the machine harness or replace the machine harness.
STOP
Test Step 4. CHECK FOR OPEN HARNESS
- The disconnect switch remains in the OFF position.
- All related electronic control modules remain disconnected from the machine harness.
- Check the resistance of the Cat Data Link circuit in the machine harness:
- Measure the resistance between connector contact J1-7 (wire 893-GN(Green)) of the VIMS ECM and connector contact 4 (wire 893-GN(Green)) of the Messenger.
- Measure the resistance between connector contact J1-6 (wire 892-BR(Brown)) of the VIMS ECM and connector contact 5 (wire 892-BR(Brown)) of the Messenger.
Expected Result:
The resistance measures less than 5 ohms.
Results:
- OK - The resistance is less than 5 ohms. The Cat Data Link circuit in the machine harness is correct. Proceed to Test Step 5.
- NOT OK - The resistance is greater than 5 ohms. The machine harness has failed.
Repair: The Cat Data Link circuit is open in the machine harness. Repair the machine harness or replace the machine harness.
STOP
Test Step 5. CHECK IF THE DIAGNOSTIC CODE REMAINS
- Inspect the contacts of the harness connectors and clean the contacts.
- Reconnect all harness connectors.
- Turn the disconnect switch and the key start switch to the ON position.
- Operate the machine.
- Check the status of the CID 0800 FMI 09.
Expected Result:
The CID 0800 FMI 09 is active.
Results:
- YES - The CID 0800 FMI 09 is active. The diagnostic code has not been corrected. The ECM may have failed.
Repair: An ECM failure is unlikely. Exit this procedure and perform this procedure again. If the cause of the diagnostic code is not found, replace the ECM. See Testing and Adjusting, "Module - Replace".
STOP
- NO - The CID 0800 FMI 09 is not active. The diagnostic code does not exist at this time.
Repair: The initial diagnostic code was probably caused by a poor electrical connection or a short at one of the harness connectors that was disconnected and reconnected. Resume normal machine operation.
STOP