5 Diagnosis Diagnosis following fault codes 2510
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.
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