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| Illustration 1 | g02702259 |
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Implement ECM Location Code Schematic | |
This diagnostic code is recorded when the software location code for the Implement ECM does not match the hardware location codes.
The probable cause of this diagnostic code is software. The wrong software has been flashed into the ECM.
Note: Do not change the hard wired location code if you have flashed the incorrect software into the control.
Before performing this procedure, inspect the harness connectors that are involved in the circuit. Poor connections can often be the cause of a problem in an electrical circuit. Verify that all connections in the circuit are clean, secure, and in good condition. If a problem with a connection is found, correct the problem and verify that this diagnostic code is active before performing this procedure.
System Response:
- Implement ECM features will not work properly. This fault must be cleared and the ECM reset before normal Implement ECM functionality can begin.
Test Step 1. VERIFY HARDWARE, SOFTWARE, AND LOCATION CODE
- Using "WinFlash" check that the latest software for each Implement ECM corresponds with the correct location code. Check with your dealer for the latest software part numbers.
Expected Result:
The latest Implement software is flashed on the ECM showing the location code of 4.
Results:
- OK - Software and location codes are correct. Proceed to test step 2. The problem is likely an intermittent connection.
- NOT OK - No ECM shows any of the location codes listed. There is a problem with the machine harness.
Repair: Repair the machine harness or replace the machine harness.
STOP
- NOT OK - All part numbers are NOT correct. The installed ECM has the wrong part number or incorrect configuration software is installed.
Repair: Flash the correct configuration software on the ECM with the displayed location code. Refer to Troubleshooting, "Electronic Control Module - Flash Program".
Prior to replacing an ECM, always contact the Technical Communicator at your dealeship for a possible consultation with Caterpillar. This consultation may effect repair time. Refer to Troubleshooting, "Electronic Control Module (ECM) - Replace".
STOP
Test Step 2. INSPECT HARNESS CONNECTIONS
- Turn the key start switch and the disconnect switch to the OFF position.
- Inspect the harness connections that are related to the location codes. Make sure that the connectors are clean. Make sure that the connectors are tight.
- Check for the proper mating of the connector.
- Check all wires at the connector.
- Check each wire for nicks. Check each wire for signs of abrasion in the insulation.
- Check for moisture at the connector.
- Check for dirty contacts or corroded contacts.
- Check each pin and check each socket.
Expected Result:
The machine harness connectors are tight and the machine harness connectors are free of corrosion.
Results:
- OK - The machine harness connectors are tight and the machine harness connectors are free from corrosion. Proceed to test step 3.
- NOT OK - One or more of 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 TO GROUND.
- The disconnect switch and the key start switch remain in the OFF position.
- Disconnect the machine harness connector from the Implement ECM.
- At the machine harness for the Implement ECM, measure the resistance between the frame ground and the location code pins.
Show/hide table
Table 1 Location Codes for the Implement ECM Hardware Location Code ECM Pin Number ECM Location Code 1 Open J1-26 ECM Location Code 2 Open J1-27 ECM Location Code 4 Ground J1-28 ECM Location Code Ground J1-32
Expected Result:
The resistance measured at contacts J1-28 and J1-32 is less than 5 ohms.
Results:
- OK - The resistance measured at contacts J1-28 and J1-32 is less than 5 ohms. The harness circuit is correct. Proceed to test step 4.
- NOT OK - One or more of the resistance measurements is NOT correct. The machine harness has failed.
Repair: Repair the machine harness or replace the machine harness.
STOP
Test Step 4. CHECK FOR SHORTS TO THE +BATTERY CIRCUIT.
- The disconnect switch remains OFF.
- The ECM remains disconnected from the machine harness connector.
- At the machine harness connector for the Implement ECM, measure the resistance between contact J1-28 and all possible sources of the +battery circuit.
- At the machine harness connector for the Implement ECM, measure the resistance between contact J1-32 and all possible sources of the +battery circuit.
Expected Result:
The resistance is greater than 5 ohms.
Results:
- OK - The resistance is greater than 5 ohms. The harness circuit is correct. Proceed to test step 5.
- NOT OK - The resistance is less than 5000 ohms. The machine harness has failed.
Repair: Repair the machine harness or replace the machine harness.
STOP
Test Step 5. CHECK THE STATUS OF THE DIAGNOSTIC CODE
Note: There is a 2 minute interval time on this code.
- Perform a
45 N (10 lb) pull test on each of the wires that are associated with the data link circuit. - Reconnect all harness connectors. Verify the following:
- The connectors are fully seated.
- The clips for each connector are fastened.
- Turn the disconnect switch and the key start switch to the ON position.
- Operate the machine.
- Check the status of the CID 1326 FMI 02 diagnostic code.
Expected Result:
The CID 1326 FMI 02 diagnostic code is not active.
Results:
- OK - The CID 1326 FMI 02 diagnostic code is not active. The diagnostic code does not exist at this time. The initial diagnostic code was probably caused by a poor connection or a short at one of the connectors that was disconnected and reconnected. Resume normal operation.
STOP
- NOT OK - The CID 1326 FMI 02 diagnostic code is active. The diagnostic code has not been corrected.
Repair: If available, perform the Wiggle Test on the machine wiring harness with the Cat® Electronic Technician (Cat ET) service tool. The Wiggle Test can detect the following in the machine wiring harness.
- Momentary shorts
- Intermittent shorts
- Opens
STOP