- In order to view diagnostic codes, enter the password protected service mode. See Systems Operation, "Passwords" for more information. Use the direction keys to select the "ACTIVE ERROR" option on the second line.
Note: In order to view logged codes, press the right key (2) when "ACTIVE ERROR" is highlighted. The display will show "LOGGED ERROR".
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| Illustration 1 | g00790675 |
- The area that is highlighted in the illustration is showing the number of the error out of the total number of errors that are present.
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| Illustration 2 | g00790676 |
- The left arrow key and the right arrow key is used to display the error codes that are active. These keys are used to scroll through the codes. The illustration above shows the "MID-CID-FMI". The "39" is the MID. The "0291" is the CID and the "03" is the FMI. The arrow keys are used to scroll through the active diagnostic codes.
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| Illustration 3 | g00833798 |
Module Identifier (MID)
The module identifier (MID) identifies the electronic control module that detected the diagnostic code. Each electronic control module on the machine has a unique MID. The chart for the Module Identifier (MID) is located on the Electrical System Schematic for your machine.
| Module Identification (MID) | |
| Number For The Module | Module |
| 27 | Power Train ECM |
Failure Mode Identifier
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.
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| Illustration 4 | g00835584 |
| Failure Mode Identifier and Message Center Displays | |
|---|---|
| FMI | Description of Failure |
| 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 | "Not used" |
| 15 | "Not used" |
| 16 | "Parameter not available" |
| 17 | "Module not responding" |
| 18 | "Sensor supply fault" |
| 19 | "Condition not met" |
| 20 | "Not used" |
Detailed FMI Explanation
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 a FMI 00 to be stored.
Some of the possible causes of a FMI 00 diagnostic code are listed below.
- The signal is above normal.
- The signal is shorted to the +battery.
- 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 a FMI 01 to be stored.
Some of the possible causes of a FMI 01 diagnostic code 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 a 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 can not 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 faulty connection.
- The signal is intermittent or erratic.
- The software has been changed.
- The signal is noisy.
- The signal is out of 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 a FMI 03 diagnostic code are listed below.
- The sensor or the switch is faulty.
- The harness is damaged.
- The electronic control has failed.
Some of the possible causes of a FMI 03 diagnostic code 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 faulty control will also cause a 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 a FMI 03 diagnostic code are listed below.
- The sensor or the switch is faulty.
- The harness is damaged.
- The electronic control has failed.
Some of the possible causes of a FMI 04 diagnostic code 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 faulty control will also cause a 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 a FMI 05 diagnostic code 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 fault is very similar to FMI 04.
Some of the possible causes of a FMI 06 diagnostic code are listed below.
- There is a short to ground in the harness connection.
- There is a shorted relay.
- A faulty control will also cause a 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 a FMI 07 diagnostic code 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 faulty sensor.
Some of the possible causes of a FMI 08 diagnostic code 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 a FMI 09 diagnostic code 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 a FMI 11 diagnostic code 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 a FMI 12 diagnostic code 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 a FMI 13 diagnostic code are listed below.
- Calibration is required.
- The data is out of 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.