The following is a list of codes that are associated with the ECM location code of the machine.
| Transmission/Chassis ECM (MID 27) | ||
| DTC | Code Description | System Response |
| 1326-2 | ECM Location Code: Data Erratic, Intermittent, or Incorrect | The Transmission ECM will be disabled.
A Warning Level 1 Will Be Generated. |
The ECM location code is defined by wires going from the ECM location code pins on the ECM to ground. The combination of wires connected to ground corresponds with the software on the ECM. If the incorrect wires are connected to ground, or the incorrect version of the ECM software is installed a 1326-2 diagnostic code will occur.
Possible causes of an FMI 2 Diagnostic code are:
- The wires for the location code are open or the wires are shorted.
- The wrong software is installed on an ECM.
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| Illustration 1 | g03647135 |
|
ECM Location Code | |
Note: The diagram above is a simplified schematic of the Transmission/Chassis ECM and the ECM Location Code connections. The schematic is electrically correct. However, not all of the possible harness connectors are shown. Refer to the latest revision of Electrical Schematic, UENR6467 for the complete schematic.
The following is a list of codes that are associated with the ECM location code of the machine.
| Implement ECM (MID 82) | ||
| DTC | Code Description | System Response |
| 1326-2 | ECM Location Code: Data Erratic, Intermittent, or Incorrect | The Implement ECM will be disabled.
A Warning Level 1 Will Be Generated. |
| 2954-14 | Unknown Electronic Implement Control: Special Instruction | A Warning Level 2 Will Be Generated. |
The ECM location code is defined by wires going from the ECM location code pins on the ECM to ground. The combination of wires connected to ground corresponds with the software on the ECM. If the incorrect wires are connected to ground, or the incorrect version of the ECM software is installed a 1326-2 diagnostic code will occur.
Possible causes of an FMI 2 Diagnostic code are:
- The wires for the location code are open or the wires are shorted.
- The wrong software is installed on an ECM.
Possible causes for an FMI 14 diagnostic code are:
- A fuse for one of the ECM modules may have failed.
- The software is incorrect or incompatible for one of the modules within the data link.
- The machine harness has failed.
- A new ECM has been installed that is not the correct part.
- One of the ECM modules in the data link has failed.
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| Illustration 2 | g03572416 |
|
ECM Location Code | |
Note: The diagram above is a simplified schematic of the Implement ECM 1 and the ECM Location Code connections. The schematic is electrically correct. However, not all of the possible harness connectors are shown. Refer to the latest revision of Electrical Schematic, UENR6469 (HRC) or UENR6470 (LRC) for the complete schematic.
The following is a list of codes that are associated with the ECM location code of the machine.
| Implement ECM 2 (Steering) (MID 145) | ||
| DTC | Code Description | System Response |
| 1326-2 | ECM Location Code: Data Erratic, Intermittent, or Incorrect | The Implement ECM will be disabled.
A Warning Level 1 Will Be Generated. |
The ECM location code is defined by wires going from the ECM location code pins on the ECM to ground. The combination of wires connected to ground corresponds with the software on the ECM. If the incorrect wires are connected to ground, or the incorrect version of the ECM software is installed a 1326-2 diagnostic code will occur.
Possible causes of an FMI 2 Diagnostic code are:
- The wires for the location code are open or the wires are shorted.
- The wrong software is installed on an ECM.
| |
| Illustration 3 | g03572476 |
|
ECM Location Code | |
Note: The diagram above is a simplified schematic of the Implement ECM 2 and the ECM Location Code connections. The schematic is electrically correct. However, not all of the possible harness connectors are shown. Refer to the latest revision of Electrical Schematic, UENR6469 (HRC) or UENR6470 (LRC) for the complete schematic.
The following is a list of codes that are associated with the ECM location code of the machine.
| Implement ECM 3 (MID 147) | ||
| DTC | Code Description | System Response |
| 1326-2 | ECM Location Code: Data Erratic, Intermittent, or Incorrect | The Implement ECM will be disabled.
A Warning Level 1 Will Be Generated. |
The ECM location code is defined by wires going from the ECM location code pins on the ECM to ground. The combination of wires connected to ground corresponds with the software on the ECM. If the incorrect wires are connected to ground, or the incorrect version of the ECM software is installed a 1326-2 diagnostic code will occur.
Possible causes of an FMI 2 Diagnostic code are:
- The wires for the location code are open or the wires are shorted.
- The wrong software is installed on an ECM.
| |
| Illustration 4 | g03572496 |
|
ECM Location Code | |
Note: The diagram above is a simplified schematic of the Implement ECM 3 and the ECM Location Code connections. The schematic is electrically correct. However, not all of the possible harness connectors are shown. Refer to the latest revision of Electrical Schematic, UENR6469 (HRC) or UENR6470 (LRC) for the complete schematic.
Diagnostic Trouble Code Procedure
Prior to beginning this procedure, inspect the harness connectors that are involved in this 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 the diagnostic code is active before performing a troubleshooting procedure. For sensors powered via the fuse panel, check the condition of the appropriate fuse before beginning the troubleshooting procedure.
| Troubleshooting Test Steps | Values | Results |
|---|---|---|
| 1. Identify The Active FMI Code Associated With The Location Code | Code present |
FMI 2, proceed to Test Step 2. |
| Begin Process For FMI 2 Troubleshooting HERE | ||
| 2. Verify The Hardware And The Software Part Numbers A. Using "WinFlash" check that the latest software for each ECM corresponds with the correct location code. Check with your Technical Communicator for the latest software part numbers. B. Confirm the part number of the flash software for each ECM. C. Confirm the part number of each ECM. |
All part numbers are correct. |
OK - All part numbers are correct. Proceed to Test Step 3. NOT OK -None of the ECMs show any of the location codes listed. 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, "ECM Software Install". Proceed to Test Step 7. |
| 3. Verify Whether The Location Code Matches The ET Status Screen A. Check the ET status screen in order to verify the location code. The codes are listed below: Transmission/Chassis ECM ......................... 1 Implement ECM 1 Implement ECM 2 Implement ECM 3 |
The location codes in the ET are correct. |
OK - The location codes in the ET are correct. Proceed to Test Step 4. NOT OK - The location codes are NOT correct. Repair: Repeat this test step in order to verify that the software and hardware part numbers are correct. Proceed to Test Step 7. |
| 4. Inspect The Harness Connections Refer to the corresponding figure for wire connections associated with this circuit. A. Turn the disconnect switch to the OFF position. B. Inspect all harness connections that are related to the location codes. Make sure that the connectors are clean and tight. C. Check the connectors for proper mating. Ensure that all seals are present and in place. D. Check the harness for signs of damage or abrasion. E. 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. F. Check the exposed wires at the connectors for nicks or signs of abrasion. G. Check for moisture inside the connector. H. Check the connectors for dirty contacts or corroded contacts. I. 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. |
The machine harness connectors are tight and free of corrosion. |
OK - The machine harness connectors are tight and free of corrosion. Proceed to Test Step 5. NOT OK - The machine harness connectors are in need of repair. Repair: Repair or replace the machine harness. Proceed to Test Step 7. |
| 5. Check For Shorts to Ground A. The disconnect switch remains in the OFF position. B. Disconnect the machine harness connectors from the Implement ECM. C. At the machine harness for the Implement ECM, measure the resistance between the location code contacts and the frame ground. |
Reading less than 5 Ω. |
OK - Each of the resistance measurements are less than 5 Ω. Proceed to Test Step 6. NOT OK - One of the resistance measurements is greater than 5 Ω. The machine harness has failed. Repair: Repair the machine harness or replace the machine harness. Proceed to Test Step 7. |
| 6. Check For Shorts to the +Battery Circuit A. The disconnect switch remains in the OFF position. B. The machine harness remains disconnected from the ECM. C. At the machine harness for the ECM, measure the resistance between the location code contacts and all possible sources of the +battery circuit. |
Reading greater than 5K Ω. |
OK - Each of the resistance measurements are greater than 5K Ω. Proceed to Test Step 7. NOT OK - One of the resistance measurements is less than 5K Ω. The machine harness has failed. Repair: Repair or replace the machine harness. Proceed to Test Step 7. |
| 7. Check If The Diagnostic Code Remains A. Perform a B. Reconnect all harness connectors. Verity that the connectors are fully seated and clips are fastened. C. Turn the disconnect switch and the key start switch to the ON position. D. Operate the machine. E. Check the status of the DTC code. |
The DTC code is not active. |
OK - The DTC code 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. Resume normal machine operation. Resume normal machine operation. STOP NOT OK - The DTC code is active. The diagnostic code has not been corrected. The ECM may have failed. Repair: Check the circuit again. Perform a Wiggle Test on the machine wiring harness with the Caterpillar Electronic Technician (Cat ET) service tool. The Wiggle Test can detect the following in the machine wiring harness: Momentary shorts Intermittent shorts Opens Repair: A failure of the ECM is unlikely. If the cause of the diagnostic code is not found, the ECM may have failed. Prior to replacing an ECM, always contact the Technical Communicator for your dealership for possible consultation with Caterpillar. This consultation may greatly reduce repair time. If the ECM requires replacement, see the Troubleshooting, "ECM - Replace" section of this manual for additional information. STOP |