The following is a list of codes that are associated with the Cat® Data Link of the machine.
| Transmission ECM (MID 081) | |||
|---|---|---|---|
| J1939 | CDL | Code Description | System Response |
| 590-9 | Engine Control Module : Abnormal Update Rate | Communication between the Transmission ECM and the Engine ECM will be intermittent. Failure codes or indicators may be active that cannot be explained. | |
| 590-14 | Engine Control Module : Special Instruction | Some transmission and engine-related functions are disabled. | |
| 596-9 | Implement Control : Abnormal Update Rate | Communication between the Transmission ECM and the Implement ECM will be intermittent. Failure codes or indicators may be active that cannot be explained. | |
| 596-14 | Implement Control : Special Instruction | Some machine and implement-related functions are disabled | |
| 2448-9 | Graphical Display Module : Abnormal Update Rate | Communication between the Transmission ECM and the Information Display module will be intermittent or disabled. | |
| 3583-9 | Switch Panel #1 : Abnormal Update Rate | This failure results in events that are logged against the Transmission ECM that cannot be explained directly. The Transmission ECM cannot communicate with the switch panel or appears to communicate intermittently. | |
Each Cat Data Link circuit is an input and output of select electronic control modules. The data link is designed to carry communications between the electronic control modules. The data link is not a visible component. The data link consists of internal control circuits and the connecting harness wiring.
The diagnostic code is caused by abnormal communications between the ECM and a specific ECM module via the Data Link. The update rate is not correct. If a diagnostic code is present, correct the related diagnostic code.
This failure results in events that are logged against an ECM that cannot be explained directly. The ECM cannot communicate with another ECM or the ECM appears to communicate intermittently.
The 248-9 DTC is used by the ECM as a companion code and indicates a Cat Data Link problem. This DTC indicates that the ECM has lost all communication with another ECM. This companion code is simultaneously activated with the 590-9 DTC.
Note: The 248-9 DTC will never be activated by the ECM as a stand-alone diagnostic code.
| |
| Illustration 1 | g06601537 |
|
Transmission ECM Cat Data Link Schematic | |
The preceding diagram is a simplified schematic of the Cat Data Link connections. The schematic is electrically correct. However, not all the possible harness connectors are shown. Refer to the latest revision of Electrical Schematic, M0115149 or Electrical Schematic, M0115151for the complete schematic.
The following is a list of codes that are associated with the Cat® Data Link of the machine.
| Implement ECM (MID 082) | |||
|---|---|---|---|
| J1939 | CDL | Code Description | System Response |
| 296-9 | Transmission Control : Abnormal Update Rate | Communication between the Implement ECM and the Transmission ECM on the Cat Data Link will be intermittent. | |
| 296-14 | Transmission Control : Special Instruction | This diagnostic code indicates the Transmission ECM is not sending the necessary parameters to the Implement ECM at the proper rate. The parameters update rate generated by the Transmission ECM is not correct. | |
| 590-9 | Engine Control Module : Abnormal Update Rate | Communication between the Implement ECM and the Engine ECM on the Cat Data Link will be intermittent. | |
| 590-14 | Engine Control Module : Special Instruction | This diagnostic code indicates the Engine ECM is not sending the necessary parameters to the Implement ECM at the proper rate. The parameters update rate generated by the Engine ECM is not correct. | |
Each Cat Data Link circuit is an input and output of select electronic control modules. The data link is designed to carry communications between the electronic control modules. The data link is not a visible component. The data link consists of internal control circuits and the connecting harness wiring.
The diagnostic code is caused by abnormal communications between the ECM and a specific ECM module via the Data Link. The update rate is not correct. If a diagnostic code is present, correct the related diagnostic code.
This failure results in events that are logged against an ECM that cannot be explained directly. The ECM cannot communicate with another ECM or the ECM appears to communicate intermittently.
The 248-9 DTC is used by the ECM as a companion code and indicates a Cat Data Link problem. This DTC indicates that the ECM has lost all communication with another ECM. This companion code is simultaneously activated with the 590-9 DTC.
Note: The 248-9 DTC will never be activated by the ECM as a stand-alone diagnostic code.
| |
| Illustration 2 | g06601541 |
|
Implement ECM Cat Data Link Schematic | |
The preceding diagram is a simplified schematic of the Cat Data Link connections. The schematic is electrically correct. However, not all the possible harness connectors are shown. Refer to the latest revision of Electrical Schematic, M0115149 or Electrical Schematic, M0115151for the complete schematic.
Diagnostic Trouble Code Procedure
| Required Tools | |||
|---|---|---|---|
| Tool | Part Number | Description | Qty |
| T1 | 146-4080(1) | Digital Multimeter Group | 1 |
| 8T-3224 | Needle Tip Group | 1 | |
| 7X-1710 | Multimeter Probe Group | 1 | |
| 8T-8726 | Cable Assembly (Three Pin) (3-Pin Breakout) | 1 | |
| T2 | JERD2129 | Cat® Electronic Technician (Cat ET) | 1 |
| Windows-based PC | 1 | ||
| 538-5051 | Communication Adapter Gp | 1 | |
| T3 | 6V-4148 | Connector Repair Kit (Sure Seal) | 1 |
| T4 | 190-8900 | Connector Field Repair Kit (Deutsch) | 1 |
| T5 | 175-3700 | Connector Repair Kit Deutsch DT | 1 |
| (1) | This multimeter can use an RS232C cable to connect to a Laptop computer or Dataview tool gp for troubleshooting. |
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. Check the wiring for pinch points or abrasions. Look for and repair areas that indicate wires are exposed. If a problem with a connection is found, correct the problem and verify that this diagnostic code is active before performing a troubleshooting procedure.
- Identify the active FMI code associated with the components.
- Determine which code is present and use the list below to determine which procedure to follow.
- FMI 9 diagnostic code, proceed to "FMI 9".
- FMI 14 diagnostic code, proceed to "FMI 14".
| Verify The Hardware And The Software Part Numbers(1) | ||
|---|---|---|
| Troubleshooting Test Steps | Values | Results |
| 1. The part number of the flash software for the ECM. 2. The part number of all components related to the faulty Data Link Circuit. |
All part numbers are correct. | Result: All part numbers are correct. Proceed to "Check For Shorts", Table 5. Result: All the part numbers are not correct. Repair: A module has the wrong part number or the incorrect flash software is installed. Replace the incorrect module with a module that has the correct part number. Flash the correct software. See the Troubleshooting, "ECM Software - Install" section of this manual for additional information. Proceed to "Check If The Diagnostic Code Remains", Table 7. |
| (1) | Consult your Technical Communicator for the correct part numbers of the flash software. |
| Check For Shorts | ||
|---|---|---|
| Troubleshooting Test Steps | Values | Results |
| 1. Turn the key start switch and disconnect switch to theOFF position. 2. Disconnect the machine harness connectors from all electronic control modules that use the suspect Cat Data Link. 3. At the machine harness for the ECM, measure the resistance between the positive contact for the Cat Data Link. Measure the resistance of all other positive contacts used in J1 and J2 harness connectors. 4. At the machine harness for the ECM, measure the resistance between the negative contact for the Cat Data Link. Measure all other negative contacts used in J1 and J2 harness connectors. |
The reading is greater than 5K Ω. | Result: The harness circuit resistance is correct. Proceed to Check For Open Harness, Table 6. Result: A reading is less than 5 Ω. The machine harness has failed. Repair: Short between frame ground and the contacts of the Cat Data Link circuit in the machine harness. Repair or replace the machine harness. Note: A resistance that is greater than 5 Ω but less than 5K Ω would indicate a loose connection or a corroded connection in the circuit. A resistance measurement that is greater than 5K Ω would indicate an open in the circuit. Proceed to "Check If The Diagnostic Code Remains", Table 7. |
| Check For Open Harness | ||
|---|---|---|
| Troubleshooting Test Steps | Values | Results |
| 1. The key start switch and disconnect switch are OFF. 2. All related electronic control modules remain disconnected from the machine harness. 3. At the machine harness connector for one ECM, place a jumper wire between the positive and negative contacts for the Cat Data Link. 4. At the machine harness connector for another ECM, measure resistance between the positive and negative contacts for the Cat Data Link. |
Reading is less than 5 Ω. | Result: The Cat Data Link circuit in the machine harness is correct. Proceed to "Check If The Diagnostic Code Remains", Table 7. Result: A reading is greater than 5K Ω. The machine harness has failed. Repair: The Cat Data Link circuit is open in the machine harness. Repair or replace the machine harness. Note: A resistance that is greater than 5 Ω but less than 5K Ω would indicate a loose connection or a corroded connection in the circuit. A resistance measurement that is greater than 5K Ω would indicate an open in the circuit. Proceed to "Check If The Diagnostic Code Remains", Table 7. |
| Check If The Diagnostic Code Remains | ||
|---|---|---|
| Troubleshooting Test Steps | Values | Results |
| 1. Reconnect all harness connectors. Return machine to normal operating condition. 2. Turn the start switch and the disconnect switch ON. 3. Clear all diagnostic codes. 4. Operate the machine. 5. Stop the machine and engage the safety. 6. Check if the diagnostic code is active. |
The diagnostic code is no longer present. | Result: The diagnostic code does not exist currently. The initial diagnostic code may have been caused by poor electrical connection or short at one of the harness connections. Resume machine operation. STOP. Result: The diagnostic trouble code has not been corrected. If the diagnostic code has not been corrected after performing the procedure a second time, the ECM may require replacement. Prior to replacing the ECM, always contact the Technical Communicator at your dealership for possible consultation with AVSpare. This consultation may effect repair time. Follow the steps in Troubleshooting, "ECM - Replace" if the ECM needs to be replaced. STOP. |
| Check For Related Diagnostic Codes | ||
|---|---|---|
| Troubleshooting Test Steps | Values | Results |
| 1. The FMI 14 diagnostic code for the Data Link is active. Look for one of the active control module diagnostic codes that is listed at the beginning of this procedure. | One of the control module diagnostic codes that is listed at the beginning of this procedure is active. | Result: One of the control module diagnostic codes that is listed at the beginning of this procedure is active. Repair: Go to the troubleshooting procedure for the active control module CID FMI diagnostic code. Perform the troubleshooting procedure for the Data Link circuit that is detailed for the control module to isolate the problem. Proceed to "Check If The Diagnostic Code Remains", Table 9. |
| Check If The Diagnostic Code Remains | ||
|---|---|---|
| Troubleshooting Test Steps | Values | Results |
| 1. Reconnect all harness connectors. Return machine to normal operating condition. 2. Turn the start switch and the disconnect switch ON. 3. Clear all diagnostic codes. 4. Operate the machine. 5. Stop the machine and engage the safety. 6. Check if the diagnostic code is active. |
The diagnostic code is no longer present. | Result: The diagnostic code does not exist currently. The initial diagnostic code may have been caused by poor electrical connection or short at one of the harness connections. Resume machine operation. STOP. Result: The diagnostic trouble code has not been corrected. If the diagnostic code has not been corrected after performing the procedure a second time, the ECM may require replacement. Prior to replacing the ECM, always contact the Technical Communicator at your dealership for possible consultation with AVSpare. This consultation may effect repair time. Follow the steps in Troubleshooting, "ECM - Replace" if the ECM needs to be replaced. STOP. |