FMI fault code (fault mode indicator

CCN Component Circuit diagra m

Z105 Actual value switch 31

Floating axle lock pressure Z110 Transmission system pressure actual value switch 44 Z111 Transmission filter maintenance actual value switch 44

Z112 Transmission oil level switch (min) 44 Z113 Cab position actual value switch 1 28 Z114 Cab position actual value switch 2 28 Z115 Inching contact actual value switch 41

FMI fault code (fault mode indicator)

FMI 00

Data valid, but above normal operating range Any electronic control system has an upper threshold for the expected operating range of the signal. This includes ranges such as e.g. high power converter temperatures. A sensor that is still working, but transmitting signals above the expected threshold value will consequently release the storage of the FMI 00 code. Possible causes of a FMI 00 fault may include: –The signal is above the normal value. –The signal has a short-circuit with the battery plus. –The sensor must be calibrated. Example: A PWM sensor is not to generate a valid signal above 80% of the duty cycle. If the sensor generates a signal of 81% of the duty cycle, it still works, but the signal is above the expected value range.

FMI 01

Data valid, but below normal operating range Any electronic control system has a lower threshold for the expected operating range of the signal. This includes ranges such as e.g. low engine oil pressure. A sensor that is still working, but transmitting signals below the expected threshold value will consequently release the storage of a FMI 01 code. Possible causes of a FMI 01 fault may include: –The signal is below the normal value. –The timing is delayed. Example: Most PWM sensors are not to generate a valid signal of less than 5% of the duty cycle. If the sensor generates a signal of 3% of the duty cycle, it still works, but the signal is below the expected value range.

FMI 02

Data are erratic, intermittent or incorrect

FMI 03

Voltage above normal value or short-circuit / high value

FMI 04

Voltage below normal value or short-circuit / low value The signal from a component is available. The control system reading the diagnosis information cannot properly read the signal. The signal appears to be lost, unstable or invalid. The data may alternately be correct or incorrect. This refers to the communication between control systems. This is an example of communication between control systems when the monitoring system searches for the engine speed from the engine ECM via another data link.

Possible causes of a FMI 02 fault may include: –A connection has failed. –The signal is intermittent or erratic. –The software was modified. –The signal is noisy. –The signal is outside of the range.

FMI 03 occurs when the voltage reading from the component or from the system is high. FMI 03 frequently refers to a signal circuit. Possible causes of a FMI 03 fault may include: –Sensor or switch failed. –Wiring loom damaged. –Electronic control module failed. –A sensor generates an alternating signal (duty cycle) and the output stops at the max. signal output. –The sensor signal line in the wiring loom is shorted to the sensor power supply or to a voltage higher than the power supply voltage. –A signal line is open between the sensor and the electronic control. Electronic controls normally pull the input circuit to a positive voltage level.

E.g. the input circuit reads 5 V when the sensor is disconnected. –The electronic control has an internal short-circuit to a plus source on the connector contact of the sensor signal. A fault electronic control believes that there is a fault whereas the signal circuit works properly.

The component or system voltage is below the threshold value. FMI 04 mostly refers to a signal circuit. The following components may cause an FMI 04 fault: –The switch sensor has failed. –The wiring loom is damaged. –The electronic control has failed.

Possible causes of a FMI 04 fault may include: –A failed sensor and low voltage output. –A sensor signal in a wiring loom has a short-circuit to ground. –A failed module also causes an FMI 04, but this is highly unlikely.

FMI 05 Current is below the normal value or open circuit

FMI 06 Current above normal value or grounded circuit

FMI 07

Mechanical system not responding properly

FMI 08 Abnormal frequency, pulse width or period The current through a component or system is lower than the threshold value. FMI 05 mostly refers to a driver circuit. FMI 05 appears when the electronic control identifies a low current value. Possible causes of a FMI 05 fault may include: –Open circuit or poor wiring loom connection. –Open relay. –Open switch.

Possible causes of a FMI 05 fault may include: –A failed sensor and low voltage output. –A sensor signal in a wiring loom has a short-circuit to ground. –A failed module also causes an FMI 04, but this is highly unlikely.

The current through a component or system is higher than the threshold value. FMI 06 mostly refers to a driver circuit. This fault is very similar to FMI 04. Possible causes of a FMI 06 fault may include: –Short-circuit to ground in the wiring loom connection. –Short-circuit in a relay. –A failed control also causes an FMI 06, but this is highly unlikely.

FMI 07 appears when an electronic control sends an electrical command to a mechanical system and the expected result is not within the range. Possible causes of a FMI 07 fault may include: –The component does not respond properly. –The component is stuck in a position. –A component has failed. –The engine is shut down. –The machine is not used properly. Example: FMI 07 appears when the transmission shifts too slowly due to a sluggish solenoid valve.

FMI 08 appears when a frequency of the signal or the pulse width of the signal is not within the expected range. FMI 08 may also refer to a faulty sensor. Note: The period is the time in seconds for a cycle at a specific frequency. Possible causes of a FMI 08 fault may include: –The wiring loom connections are intermittent or poor. –(The engine misfires.) –The signal is noisy due to a nearby source of interference. –Loose mechanical parts.

FMI 09 Abnormal update FMI 09 refers to the communication between the electronic controls on the data link. FMI 09 appears when an electronic control cannot receive information from another electronic control and when the electronic control expects to receive information. Possible causes of a FMI 09 fault may include: –The control module does not communicate properly on the data link. –The data transmission rate is abnormal. –The data link has failed. –Software incompatibility.

FMI 10 Abnormal rate of change FMI 10 refers to a signal changing too fast. The rate of change is outside of the expected threshold value.

FMI 11

Fault not identifiable FMI 11 appears when the electronic control identifies more than one FMI as the reason for a single problem. Possible causes of a FMI 11 fault may include: –Mechanical fault –Damage to multiple circuits.

FMI 12

Unit or component defective FMI 12 describes the following condition: An electronic control sends a signal to another electronic module via the data link. The control expects a reply, but receives no or an incorrect reply. FMI 12 also describes the following condition: An electronic module is to transmit the data periodically, but does not send the data. Possible causes of a FMI 12 fault may include: –Electronic control failed. –Data link failed. –One or several controls with incompatible software.

FMI 13 Out of calibration range Possible causes of a FMI 13 fault may include: –Calibration is necessary. –Data outside 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 power supply failure The sensor power supply has failed.

FMI 19 - Condition not met The conditions defined in the software are not met