Source: https://truckmanualshub.com/mid223-gecu-volvo-fh-gear-selector-control-fault-codes/
Timestamp: 2019-04-25 07:46:44+00:00

Document:
FMI 0 The power supply voltage of the GECU unit is above 33 V. A device for fast charging of batteries is connected, electric welding has been performed, or the battery charging regulator is faulty.
FMI 1 The power supply voltage of the GECU unit is below 9 V. The contact of the GECU unit connection with the power or ground point is broken. The batteries may be dead.
FMI 2 There is no voltage 5 V. power button.
FMI 4 The power supply voltage of the button is between 0 and 0.5 V. A short circuit in the circuit of the button to ground.
FMI 5 The button supply voltage is between 0.9 and 1.1 V. There is an open circuit in the button circuit.
FMI 2 There is no data in the data channel. Broken wire data channel. Oxidized or damaged contacts in the connectors.
FMI 3 Short circuit to the power wire or closed relay K03.
FMI 2 Error in the software. Reprogram the GECU.
FMI 9 Data feed is not working. Broken wire data channel. Oxidized or damaged contacts in the connectors. The unit may be reprogrammed or the GECU is faulty.
FMI 12 Internal malfunction in TECU MID130 gearbox control unit. Replace the TECU.
FMI 0 The supply voltage exceeds 6 V. A short circuit in the selector to the power supply or to a higher voltage.
FMI 1 Supply voltage below 4 V. Open or short in the selector.
FMI 12 Signals from leverage sensors do not meet acceptable values. Open, short circuit in the selector, there is no signal from the sensor, several sensors simultaneously give the wrong signal.
FMI 2 There is no data in the data channel. Broken wire data channel. Oxidized or damaged contacts in the connectors. The control unit may be faulty.
FMI 9 Message update time from MID130 transmission control unit has expired. The fuse in the power supply circuit of the control unit of the gearbox MID130 has blown, the data channel wiring is damaged, the control unit is being reprogrammed or the unit is faulty.
FMI 7 The relay does not turn on. Faulty relay K05.
FMI 12 Shorting the signal wire to ground when the relay is on.
FMI 2 Power failure (KL / DR, pin 2). Broken wire or fuse F57 defective.
FMI 2 The micro switch in the selector is faulty.
FMI 9 The MID223 selector control unit does not receive signals from the MID128 engine control unit through the SAE J1939 data channel. Broken or partial damage to data wire between the blocks.
FMI 9 The MID223 selector control unit does not receive signals from the MID144 vehicle control unit via SAE J1939 data channel. Broken or partial damage to data wire between the blocks.
FMI 9 The MID223 selector control unit does not receive signals from the MID130 gearbox control unit via the SAE J1939 data channel. Broken or partial damage to data wire between the blocks.
FMI 3 Shorting the signal wire to the power wire.

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