Portions of this material are reprinted with permission from SAE J1939DA_201607© 2016 SAE International. SAE International is not responsible for any use or translation of this material, in whole or in part. Please contact SAE International to obtain a complete copy of SAE J1939DA_201607, the official definitive source of this standard.
| Diagnostic Codes For the Transmission ECM (MID 027)(1) | |
|---|---|
| For troubleshooting, see the procedure with the same CID and the FMI. | |
| CID-FMI | Description |
| CID 0041 8 Volt DC Supply | |
| FMI 03 | "Voltage above normal or shorted high." |
| FMI 04 | "Voltage below normal or shorted low." |
| CID 0168 Electrical System | |
| FMI 01 | "Voltage below normal or shorted low." |
| CID 0177 Temperature Sensor (Transmission Oil) | |
| FMI 03 | "Voltage above normal or shorted high." |
| FMI 04 | "Voltage below normal or shorted low." |
| CID 0190 Speed Sensor (Engine) | |
| FMI 02 | "Incorrect signal" |
| FMI 08 | "Abnormal signal" |
| CID 0247 Electronic Control Module (Engine) | |
| FMI 09 | Abnormal update |
| CID 0262 5 Volt DC Power Supply | |
| FMI 03 | "Voltage above normal or shorted high." |
| FMI 04 | "Voltage below normal or shorted low." |
| CID 0444 Start Relay | |
| FMI 03 | "Voltage above normal or shorted high." |
| FMI 05 | "Current below normal or open circuit." |
| FMI 06 | "Current above normal or grounded circuit." |
| CID 0585 Speed Sensor (Transmission Output) | |
| FMI 02 | "Incorrect signal" |
| FMI 08 | "Abnormal signal" |
| CID 0590 Electronic Control Module (Engine) | |
| FMI 02 | "Incorrect signal" |
| FMI 09 | "Abnormal update" |
| FMI 12 | "Bad device or component" |
| CID 0668 Transmission Shift Lever | |
| FMI 09 | Abnormal update |
| CID 0672 Speed Sensor (Torque Converter Output) | |
| FMI 02 | "Incorrect signal" |
| FMI 08 | "Abnormal signal" |
| CID 0700 Sensor (Transmission Gear) | |
| FMI 02 | "Incorrect signal" |
| CID 0702 Position Sensor (Shift Lever) | |
| FMI 02 | "Incorrect signal" |
| CID 0707 Solenoid Valve (Upshift) | |
| FMI 03 | "Voltage above normal or shorted high." |
| FMI 05 | "Current below normal or open circuit." |
| FMI 06 | "Current above normal or grounded circuit." |
| CID 0708 Solenoid Valve (Downshift) | |
| FMI 03 | "Voltage above normal or shorted high." |
| FMI 05 | "Current below normal or open circuit." |
| FMI 06 | "Current above normal or grounded circuit." |
| CID 0709 Solenoid Valve (Lockup Clutch) | |
| FMI 03 | "Voltage above normal or shorted high." |
| FMI 05 | "Current below normal or open circuit." |
| FMI 06 | "Current above normal or grounded circuit." |
| CID 0718 Transmission System | |
| FMI 14 | Transmission output rotation in stall gear. |
| CID 0826 Temperature Sensor (Torque Converter Oil) | |
| FMI 03 | "Voltage above normal or shorted high." |
| FMI 04 | "Voltage below normal or shorted low." |
| CID 1326 Location Code | |
| FMI 02 | "Incorrect Data" |
| CID 2446 Lockup Clutch Switch | |
| FMI 03 | "Voltage above normal or shorted high." |
| FMI 04 | "Voltage below normal or shorted low." |
| (1) | For the Transmission ECM, the MID is 027. This table pertains only to diagnostic codes with a MID of 027. |
Some applications may show a J1939 message rather than a message over the Cat Data Link. Table 2 lists the corresponding messages for the Cat Data Link and the J1939 messages.
| Cat Data Link | J1939 |
|---|---|
| CID 0041 | SPN 678 |
| CID 0168 | SPN 168 |
| CID 0177 | SPN 177 |
| CID 0190 | SPN 190 |
| CID 0247 | SPN 639 |
| CID 0444 | SPN 1675 |
| CID 0585 | SPN 191 |
| CID 0672 | SPN 161 |
| CID 0702 | SPN 525 |
| CID 0709 | SPN 740 |
| CID 0826 | SPN 120 |
| CID 2446 | SPN 682 |
Note: This table shows the diagnostic codes for the transmission ECM only. The diagnostic codes for the ECM are shown on the display area of the Caterpillar Monitoring System. The information of the diagnostic code for the ECM is transferred via the Cat Data Link to the Caterpillar Monitoring System. This diagnostic information is shown when the Caterpillar Monitoring System is in the service mode. The module identifier (MID) tells the service person the ECM that is sending the diagnostic code. The MID for the transmission ECM is 027. This Service Manual Module is for diagnostic codes with an MID of 027. The Electrical System Schematic shows the module identifier (MID) codes of any other electronic controls on a machine. Information for electronic troubleshooting of the diagnostic codes (MID is not 027) can be found in the service manual for that system.
Diagnostics from other electronic control modules are shown on the monitoring system. Other electronic control modules transfer this diagnostic information on the Cat Data Link to the monitoring system.
The module identifier (MID) identifies the electronic control module that detected the failure. Each electronic control module on the machine has a unique MID. Use the following chart in order to match the MID for each diagnostic code to a specific electronic control module. The chart for the Module Identifier (MID) is located on the Electrical System Schematic for your machine. See the chart if the MID is not shown on the display of your machine. After the operator determines the electronic control module that has detected the failure, see the service manual module for that particular ECM for more troubleshooting information. The service manual for each ECM is part of the machine's Service Manual.
If the MID is for the transmission ECM, use this service manual module. The MID for the Transmission ECM is 027. If the MID is different, use the appropriate module.
| Description of the Module Identifier | |
|---|---|
| MID | Description |
| 030 | Caterpillar Monitoring System |
| 036 | Engine ECM |
| 027 | Transmission ECM |
The codes for the Failure Mode Identifier are defined by the SAE standards. The following list contains a Cat version of definitions. The diagram that follows will help you understand the use of FMI with sensors.
| |
| Illustration 1 | g00493694 |
| Failure Mode Identifier and Message Center Displays | |
|---|---|
| FMI | "Failure Description" |
| 00 | "Data valid but above normal operating range" |
| 01 | "Data valid but below normal operating range" |
| 02 | "Data erratic, intermittent or incorrect" |
| 03 | "Voltage above normal or shorted high" |
| 04 | "Voltage below normal or shorted low" |
| 05 | "Current below normal or open circuit" |
| 06 | "Current above normal or grounded circuit" |
| 07 | "Mechanical system not responding properly" |
| 08 | "Abnormal frequency, pulse, or period" |
| 09 | "Abnormal update" |
| 10 | "Abnormal rate of change" |
| 11 | "Failure mode not identifiable" |
| 12 | "Bad device or component" |
| 13 | "Out of calibration" |
| 14 | N/A |
| 15 | N/A |
| 16 | "Parameter not available" |
| 17 | "Module not responding" |
| 18 | "Sensor supply fault" |
| 19 | "Condition not met" |
| 20 | N/A |
FMI 00 "Data Valid But Above Normal Operating Range" - Every electronic control system sets a high limit for the expected operating range of the signal. The high limit includes over range signals. This could be a high temperature. A sensor that is still operating but sending a signal above the expected limit will cause an FMI 00 to be stored.
Some of the possible causes of an FMI 00 are listed below.
- The signal is above normal.
- The signal is shorted to the +battery circuit.
- The sensor needs to be calibrated.
This is an example of a sensor that needs calibration. A PWM signal that is at a duty cycle of 80 percent is a valid signal. If the PWM signal has a duty cycle of 81 percent the sensor is still working, but the sensor signal is above the expected signal limits.
FMI 01 "Data Valid But Below Normal Operating Range" - Every electronic control system sets a low limit for the expected operating range of the signal. The limit includes signals that are under the lower limit. The low signal could be the oil pressure signal. The sensor is still working but sending a signal below the expected limit will cause an FMI 01 to be stored.
Some of the possible causes of an FMI 01 are listed below.
- The signal is below the normal range.
- The timing is retarded.
This is an example of a PWM sensor. This sensor is not expected to generate a PWM signal below a duty cycle of 5 percent with zero air pressure. If the sensor generates a signal with a duty cycle of 4 percent when the engine is shutdown. The sensor is still working but sending a signal below the expected limit will cause an FMI 01 to be stored.
FMI 02 "Data Erratic, Intermittent or Incorrect" - The signal from a component is present. The control that reads the diagnostic information cannot read the signal properly. The signal appears to be gone, unstable, or invalid. The data can be correct or incorrect intermittently. Also, this condition relates to communication between controls. This is an example of communication between controls. When the monitoring system is looking for the engine speed from the engine ECM over the CAT Data Link.
- There is a failed connection.
- The signal is intermittent or erratic.
- The software has been changed.
- The signal is noisy.
- The signal is out of a specified range.
FMI 03 "Voltage above normal or Shorted High" - The component or system voltage is higher than the limit. FMI 03 most often relates to a signal circuit.
Some of the components that could cause an FMI 03 are listed below.
- The sensor or the switch has failed.
- The harness is damaged.
- The electronic control module has failed.
Some of the possible causes of an FMI 03 are listed below.
- A sensor that has failed and the voltage output is high.
- Any wiring harness that has a sensor signal wire shorted to a high voltage. A high voltage is any voltage that is greater than the sensor supply voltage.
- A wiring harness that has an open circuit in the sensor signal wire will cause the control to pull up. When this occurs the input circuit is pulled up to the supply voltage.
- A control that has failed will also cause an FMI 03. This is very unlikely.
FMI 04 "Voltage below normal or Shorted Low" - The component or system voltage is lower than the limit. FMI 04 most often relates to a signal circuit.
Some of the components that could cause an FMI 04 are listed below.
- The sensor or the switch has failed.
- The harness is damaged.
- The electronic control has failed.
Some of the possible causes of an FMI 04 are listed below.
- A sensor that has failed and the voltage output is low.
- Any wiring harness that has a sensor signal wire shorted to ground.
- A failed ECM will also cause an FMI 04. This is very unlikely.
FMI 05 "Current below normal or Open Circuit" - The current through the component or the system is lower than the limit. FMI 05 is most often related to a driver circuit.
Some of the possible causes of an FMI 05 are listed below.
- There is an open circuit or a poor harness connection.
- There is an open relay.
- There is a switch in the open position.
FMI 06 "Current above normal or Grounded Circuit" - The current through the component or the system is higher than the limit. FMI 06 is most often related to a driver circuit. This failure is very similar to FMI 04.
Some of the possible causes of an FMI 06 are listed below.
- There is a short to ground in the harness connection.
- There is a shorted relay.
- A failed control will also cause an FMI 06. This is very unlikely.
FMI 07 "Mechanical System Not Responding Properly" - The control detects a signal that is sent to a mechanical system and the response is not correct.
Some of the possible causes of an FMI 07 are listed below.
- The component responds improperly.
- The component is stuck in a position.
- The component has failed.
- The engine is shut down.
- The machine is being used improperly.
FMI 08 "Abnormal Frequency, Pulse Width or Period" - This occurs when the signal is not in the expected range. FMI 08 can also relate to a sensor that has failed.
Some of the possible causes of an FMI 08 are listed below.
- The harness connections are intermittent or poor.
- The engine misfired.
- The signal is noisy due to nearby interference.
- There are loose mechanical devices.
FMI 09 "Abnormal update" - This relates to communications on the data link. FMI 09 occurs when a control is not able to get information from another control.
Some of the possible causes of an FMI 09 are listed below.
- The control module is not communicating on the data link correctly.
- The rate of data transmission is abnormal.
- The data link has failed.
- There is a mismatch of software.
FMI 10 "Abnormal Rate of Change" - This relates to a signal that changes too fast. The rate of change is outside of the expected limit.
FMI 11 "Failure mode not identifiable" - The control identifies more than one FMI as being responsible for a single failure.
Some of the possible causes of an FMI 11 are listed below.
- There is a mechanical failure.
- There is damage to multiple circuits.
FMI 12 "Bad Device or Component" - The electronic control sends a signal and the electronic control expects a response. The control receives no response or the response is incorrect.
Some of the possible causes of an FMI 12 are listed below.
- There is a failure of the electronic control.
- There is a failure on the data link.
- There are one or more controls with mismatched software.
FMI 13 "Out of Calibration" - The electrical signal is not within limits for a specific mechanical condition.
Some of the possible causes of an FMI 13 are listed below.
- Calibration is required.
- The data is out of a specified range.
FMI 14, 15, and 20 - These codes are not active.
FMI 16 "Parameter Not Available" - The control does not support the requested parameter.
FMI 17 "Module Not Responding" - The control does not respond to the request for data.
FMI 18 "Sensor Supply Failure" - The sensor power supply in the control has failed.
FMI 19 "Condition Not Met" - The conditions that are defined by the software were not met.