Cat® Command For Hauling Caterpillar

MID 039 - CID 3434 - FMI 09

Usage:

- AT6

Conditions Which Generate This Code:

MID 039 - Machine Control Module

CID 3434 - Steering Control Module

FMI 09 - Abnormal Update Rate

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Illustration 1	g03317642
Simplified CAN circuit

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Illustration 2	g03320551
Simplified CDL circuit

This diagnostic code is recorded when the Machine Control Module (MCM) does not receive expected information from the steering control electronic control module (ECM) for more than 5 seconds over the CAN or Cat Data Link (CDL) link communications. This diagnostic has companion codes to indicate what communication link has the problem. An active diagnostic companion code of MID 039 CID 0247 FMI 09 will indicate the problem lies in the Machine CAN link (CAN A). An active diagnostic companion code of MID 039 CID 0248 FMI 09 will indicate the problem lies in the CDL. If both are present, the MCM has determined that both links are not working properly.

Note: Verify presence of companion code prior to starting the following test procedure.

Test Step 1. INSPECT THE HARNESS CONNECTIONS.

Turn the keyswitch and disconnect switch to the OFF position.
Inspect all harness connections that are related to the CDL and CAN 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. For CDL companion codes, proceed to Test Step 2.
OK - The machine harness connectors are tight and free of corrosion. For CAN Link companion codes, proceed to Test Step 5.
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.

STOP

Test Step 2. CHECK FOR SHORTS TO GROUND IN THE CAT DATA LINK.

The keyswitch and disconnect switch remain in the OFF position.
Disconnect the machine and cabinet harness from all electronic control modules that use the CDL.
At the cabinet harness for the MCM, measure the resistance between contacts 8 (wire 893-GN(Green)) and 9 (wire 892-BR(Brown)) of the CDL to the frame ground.

Expected Result:

The resistance is greater than 5000 Ohms.

Results:

OK - The resistance is greater than 5000 Ohms. The harness circuit resistance is correct. Proceed to Test Step 3.
NOT OK - The resistance is less than 5000 Ohms. The machine harness has failed.
Repair: There is a short between frame ground and the CDL circuit in the machine harness. Repair the machine harness or replace the machine harness.

STOP

Test Step 3. CHECK THE MACHINE HARNESS FOR A SHORT TO THE +BATTERY CIRCUIT.

The keyswitch and disconnect switch remain in the OFF position.
All related electronic control modules remain disconnected from the machine harness.
At the machine harness connector for the MCM, perform the checks that are listed here:
- Measure the resistance between the connector contact 52 (wire 152-WH(White)) and connector contact 8 (wire 893-GN(Green)).
- Measure the resistance between connector contact 52 (wire 152-WH(White)) and connector contact 9 (wire 892-BR(Brown)).

Expected Result:

The resistance is greater than 5000 Ohms.

Results:

OK - The harness circuit resistance is correct. Proceed to Test Step 4.
NOT OK - The resistance is less than 5000 Ohms. The machine harness has failed.
Repair: There is a short between the +battery circuit and the circuits of the CDL circuit in the machine harness. Repair the machine harness or replace the machine harness.

STOP

Test Step 4. CHECK FOR AN OPEN IN THE HARNESS.

The keyswitch and disconnect switch remain in the OFF position.
All related electronic control modules remain disconnected from the machine harness.
Check the continuity of the CDL circuit in the machine harness:
- Measure the resistance between connector contact 8 (wire 893-GN(Green)) of the MCM and connector contact J1-10 (wire 893-GN(Green)) of the steering control ECM.
- Measure the resistance between connector contact 9 (wire 892-BR(Brown)) of the MCM and connector contact J1-20 (wire 892-BR(Brown)) of the steering control ECM.

Expected Result:

The resistance measures less than 5 Ohms.

Results:

OK - The resistance is less than 5 Ohms. The CDL 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 CDL circuit is open in the machine harness. Repair the machine harness or replace the machine harness.

STOP

Test Step 5. CHECK FOR SHORTS TO GROUND IN THE CAN LINK.

The disconnect switch remains in the OFF position.
Disconnect the machine and cabinet harness from all electronic control modules that use the CAN Link.
At the cabinet harness for the MCM, measure the resistance between contacts 34 (wire Y957-GN(Green)) and 50 (wire Y956-YL(Yellow)) of the CAN Link to the frame ground.

Expected Result:

The resistance is greater than 5000 Ohms.

Results:

OK - The resistance is greater than 5000 Ohms. The harness circuit resistance is correct. Proceed to Test Step 6.
NOT OK - The resistance is less than 5000 Ohms. The machine harness has failed.
Repair: There is a short between frame ground and the CAN Link circuit in the machine harness. Repair the machine harness or replace the machine harness.

STOP

Test Step 6. CHECK THE MACHINE HARNESS FOR A SHORT TO THE +BATTERY CIRCUIT.

The keyswitch and disconnect switch remain in the OFF position.
All related electronic control modules remain disconnected from the machine harness.
At the machine harness connector for the MCM, perform the checks that are listed here:
- Measure the resistance between the connector contact 52 (wire 152-WH(White)) and connector contact 34 (wire Y957-GN(Green)).
- Measure the resistance between connector contact 52 (wire 152-WH(White)) and connector contact 50(wire Y956-YL(Yellow)).

Expected Result:

The resistance is greater than 5000 Ohms.

Results:

OK - The harness circuit resistance is correct. Proceed to Test Step 7.
NOT OK - The resistance is less than 5000 Ohms. The machine harness has failed.
Repair: There is a short between the +battery circuit and the circuits of the CAN Link circuit in the machine harness. Repair the machine harness or replace the machine harness.

STOP

Test Step 7. CHECK FOR AN OPEN IN THE HARNESS.

The keyswitch and disconnect switch remain in the OFF position.
All related electronic control modules remain disconnected from the machine harness.
Check the continuity of the CAN Link circuit in the machine harness:
- Measure the resistance between connector contact 34 (wire Y957-GN(Green)) of the MCM and connector contact J2-68 (wire Y957-GN(Green)) of the steering control ECM.
- Measure the resistance between connector contact 50 (wire Y956-YL(Yellow)) of the MCM and connector contact J2-67 (wire Y956-YL(Yellow)) of the steering control ECM.

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 8.
NOT OK - The resistance is greater than 5 Ohms. The machine harness has failed.
Repair: The CAN Link circuit is open in the machine harness. Repair the machine harness or replace the machine harness.

STOP

Test Step 8. CHECK THE TERMINATION RESISTORS.

The keyswitch and disconnect switch remain in the OFF position.
Locate both termination resistors for the CAN A circuit.
One at a time, disconnect the termination resistors from the harness and measure the resistance between contacts A and B.

Expected Result:

The measure resistance is 120 ± 12 ohms.

Results:

OK - The measured resistance is 120 ± 12 ohms. The termination resistors are correct. Proceed to Test Step 9.
NOT OK - The measured resistance is NOT 120 ± 12 ohms.
Repair: The resistor or resistors that were not within the specified value have failed. Replace the bad resistors.

STOP

Test Step 9. CHECK FOR ADDITIONAL DIAGNOSTIC CODES FOR THE OTHER ELECTRONIC CONTROL MODULES.

The keyswitch and disconnect switch remain in the OFF position.
One at a time, reconnect the electronic control modules that use the Cat Data Link and CAN Link.
Turn the disconnect switch and the keyswitch to the ON position.
After each of the electronic control modules has been reconnected, check the Event List for diagnostic codes that are logged against the electronic control module.

Expected Result:

Diagnostic codes are not present for the other electronic control modules in the event list.

Results:

OK - Diagnostic codes are not present for the other electronic control modules in the event list.
Repair: The steering control ECM has failed. It is unlikely that the ECM has failed. Exit this procedure. Perform this procedure again. If the failure is not found, replace the ECM. Refer to Testing and Adjusting, KENR8394, "Electronic Control Module (ECM) - Replace".

STOP
NOT OK - Diagnostic codes are present for the other ECMs in the event list.
Repair: The MCM has failed. It is unlikely that the MCM has failed. Exit this procedure. Perform this procedure again. If the failure is not found, check the +battery contacts and ground contacts of the MCM. If these contacts are correct, replace the MCM. Refer to Testing and Adjusting, KENR8394, "Electronic Control Module (ECM) - Replace".

STOP