Source: https://truckmanualshub.com/mid144-volvo-vecu-control-unit-fault-codes/
Timestamp: 2019-04-25 08:41:43+00:00

Document:
FMI 3 The voltage of the signal from the pedal sensor is higher than 4.3 V. A break in the ground wire. Closing the signal wire to a higher voltage. Faulty sensor or idling switch 3 accelerator pedals.
FMI 4 The signal voltage from the pedal sensor is below 0.4 V. Breakage of the signal or supply wire. Shorting the signal wire to ground. The pedal sensor may be faulty.
FMI 0 The pressure in the air suspension receiver is above normal. The compressor discharge valves in the compressor head are faulty, the wiring of the compressor discharge solenoid valve in the dryer is damaged. Damaged, dirty or clogged compressor discharge valve in the drier. The air pressure sensor is faulty (the sensor is located behind the instrument panel on the right).
FMI 1 The vehicle control unit receives a signal from a sensor with a voltage below 3.1 V (corresponds to 9.7 bar) for the older version and below 2.6 V (corresponds to 8.0 bar) for a newer version. Air pressure below normal. Air leaks, clogged, damaged air lines or air suspension components.
FMI 3 The vehicle control unit receives a signal from a sensor with a voltage higher than 4.5 V (corresponding to 15 bar). Broken wire connection to ground. Shorting the signal wire to a higher voltage. Theair pressure sensor may be faulty (the sensor is located behind the instrument panel on the right).
FMI 4 The vehicle control unit receives a signal from a sensor with a voltage above 0.5 V. Breakage of the signal or supply wires. Shorting the signal wire to ground. Air pressure sensor may be faulty.
FMI 14 It appears when the signal from the vehicle control unit is sent to the desiccant, and the air pressure in the system continues to increase. Damaged or blocked tube control valves of the compressor from the desiccant. Faulty valves in the compressor head (jammed in the closed position). Damaged wiring between the vehicle control unit and the discharge valve on the water dryer. Damaged, dirty or clogged compressor discharge valve in the drier. The air pressure sensor is faulty (the sensor is located behind the instrument panel on the right). The safety valve should go off. If the safety valve is clogged and does not work, the compressor head seals may fail and large amounts of air from the compressor may enter the engine cooling system.
FMI 2 There is a big difference between the speed signals from the tachograph (via the SAE J1939 data channel or to the contact of the vehicle control unit PB6) and the speed signals from the wheel rotation sensors (ABS). Before searching for faults in the vehicle control unit system, read the fault codes of the ABS / EBS systems and eliminate the causes of their occurrence. It is also possible that the wiring is faulty or the signals from the tachograph are not correct. Perhaps there were manipulations with the speed sensor or with the wiring between the speed sensor on the gearbox and the tachograph.
FMI 14 Tachograph speed signals are not correct. Damaged wiring. Perhaps defective speed sensor on the gearbox or tachograph.
FMI 14 The vehicle control unit (VECU) does not receive information from the adaptive cruise control unit (ACC) via the SAE J1939 data channel. Breaking or partial damage to the data channel. The ACC unit may be faulty.
FMI 3 The voltage of the signal coming to the control unit from the accelerator pedal sensor is higher than 4.3 V. Break in the power or ground wire. Shorting the signal wire to a higher voltage. The pedal position sensor or the idle switch No. 1 pedal may be faulty. The sensor and switches are integrated with the accelerator pedal.
FMI 4 The voltage of the signal to the control unit from the accelerator pedal sensor is less than 0.4 V. The break in the power or signal wire. Shorting the signal wire to ground. Defective or oxidized contacts in the connectors. Accelerator pedal position sensor may be faulty.
FMI 5 The low level signal from the position sensor does not match the signals from the idling switch No. 1 or No. 2. The pedal position sensor is faulty. Damaged or oxidized pins in connectors.
FMI 6 The high level signal from the position sensor does not match the signals from the idling switch No. 1 or No. 2. The pedal position sensor is faulty. Damaged or oxidized pins in connectors.
FMI 14 Malfunction in the power circuit. Breakage or partial damage to the power cord.
FMI 4 The voltage at the PBV contact of the vehicle control unit with an unused function is below 2.3 V. Break in the power supply wire of the power take-off solenoid valve. Broken wire between the valve and the control unit. Damaged or oxidized pins in connectors. The solenoid valve may be faulty.
FMI 12 The code is registered in the event of an internal software failure, and the internal independent function of restarting the vehicle control unit is triggered. The code is informational and is not a malfunction code.
FMI 7 The accelerator pedal is fully released, and the signal from the idle switch does not flow to the vehicle control unit. Break signal or power wires. Shorting the signal wire to ground or positive.Damaged or oxidized pins in connectors. Perhaps a faulty switch integrated with the accelerator pedal.
FMI 2 The control unit does not receive messages over the SAE J1939 data channel. Breakage or partial damage to the data channel wiring. Damaged or oxidized pins in connectors.
FMI 12 The control unit does not receive messages over the SAE J1939 data channel. Breakage or partial damage to the data channel wiring. Damaged or oxidized pins in connectors.
FMI 2 Errors in messages on the data channel SAE J1708. Partial damage to the data channel wiring.
FMI 2 Programming error or control unit memory chip is faulty. Try to reprogram the unit (performed only on authorized service stations).
FMI 14 Data error Faulty memory chip in control unit or software error. Try to reprogram the unit (performed only on authorized service stations).
FMI 3 Very strong current through the power stage. Short to power plus. Faulty wiring or short circuit in the relay coil.
FMI 4 Faulty relay, wire break or short to ground.
FMI 7 Faulty wiring or switch.
FMI 3 The signal from the buffered idle switch does not match the signal from the idle switch No. 1 accelerator pedal. Signal wire shorted to ground.
FMI 4 The signal from the buffered idle switch does not match the signal from the idle switch No. 1 accelerator pedal. Signal wire shorted to ground.
FMI 4 The vehicle control unit has detected a voltage lower than 3 V on the power wire of the switches. Shorting of the power wire to ground, short circuit of the signal wire of the accelerator pedal switch, brake or clutch to ground.
FMI 4 The vehicle control unit has detected a voltage lower than 3 V on the power wire of the switches. Shorting of the power wire to ground. Closing the cruise control switch signal wire SET + / SET- / RESUME / ON. A short to ground on the signal wire of the VCB / EPG engine brake switch. A short to ground on the signal wire of the retarder switch SET + / SET-. One of the switches may be faulty.
FMI 3 The car control unit has detected a voltage of more than 5.3 V on the power supply wire. A break in the ground wire, a short to a higher voltage, a break in the power wire. The retarder switch or the accelerator pedal sensor may be faulty. Damaged or oxidized pins in connectors.
FMI 4 The vehicle control unit has detected a voltage lower than 4.7 V on the power wire. Shorting of the power wire to ground. The retarder switch or the accelerator pedal sensor may be faulty.
FMI 3 The vehicle control unit has detected a voltage of more than 5.3 V on the power wire. An open circuit of the ground wire, a short circuit of the power wire to a higher voltage, an open circuit of the power wire. The air pressure sensor may be faulty (located behind the instrument panel on the right) or the “Dynafleet” switch.
FMI 4 The vehicle control unit has detected a voltage lower than 4.7 V on the power wire. Shorting of the power wire to ground. The air pressure sensor may be faulty (located behind the instrument panel on the right) or the “Dynafleet” switch.
FMI 3 The control voltage of the relay K2 is from the PB15 contact of the vehicle control unit above 1 V. Short circuit to a higher voltage or the relay K2 is faulty (located on the central distribution board of the relay and fuses in the middle of the instrument panel).
FMI 4 The control voltage of the relay K2 from the PB15 contact of the vehicle control unit is below 0 V. There is a wire break with the relay K2 or the relay is faulty.
FMI 3 The vehicle control unit registers a voltage higher than 6.5 V at the PB18 contact. A short circuit between the solenoid valve of the range dial lock (located at the rear of the gearbox on the range ring cylinder) and the vehicle control unit is connected to the power cord. The solenoid valve may be faulty.
FMI 4 The vehicle control unit registers a voltage below 2.3 V at the PB18 contact. A break in the supply wire of the demultiplicator blocking solenoid valve. A short to ground between the solenoid valve and the control unit. The solenoid valve may be faulty (located at the rear of the transmission on the range-cylinder cylinder). Damaged or oxidized pins in connectors.
FMI 3 The vehicle control unit registers a voltage of more than 6.5 V. A short to the power wire or a faulty relay.
FMI 3 The vehicle control unit has detected a voltage of more than 6.5 V. The short circuit of the wire between the relay K8 and the vehicle control unit. Relay K8 may be faulty (located on the central distribution board of the relay and fuses in the middle of the instrument panel).
FMI 4 The vehicle control unit has detected a voltage of less than 2.3 V. Closing the wire between the relay K8 and the vehicle control unit to ground. Break in the power wire of the relay or wire between the relay and the vehicle control unit. Relay K8 may be faulty (located on the central distribution board of the relay and fuses in the middle of the instrument panel).
Block switches road information system “Dynafleet”.
FMI 3 The voltages on the power wire of the switch box are above 5 V. The wiring is damaged or the “Dynafleet” switch is faulty.
FMI 4 The voltages on the power supply of the switch box are below 0.5 V. The wiring is damaged or the “Dynafleet” switch is faulty.
FMI 3 The voltage on the power wire between the vehicle control unit and the speed sensor is above 9 V. Break of the ground wire. Shorting the signal wire to a higher voltage. There may be a speed sensor malfunction.
FMI 4 The voltage on the power wire between the vehicle control unit and the speed sensor is below 6.5 V. Breakage of the signal or supply wire. Shorting the signal wire to ground. There may be a speed sensor malfunction.
FMI 0 The life of the filter drier, calculated by the control unit of the car, is over.
FMI 3 A short to a higher voltage or a faulty relay.
FMI 4 Broken wire from relay or faulty relay.
FMI 0 Very high air flow rate due to air leaks or frequent use of equipment that requires large amounts of compressed air to operate.
FMI 7 The regeneration valve is open for 30 seconds, while the pressure in the pneumatic system has not changed. The dehumidifier muffler is clogged, the regeneration valve is dirty, defective and does not open. Damaged wiring between the control unit and the dehumidifier solenoid valves. Check fuses F10 or F6 (depending on the version of the electronic equipment). Check for the presence of a 24 volt supply on the black wire of the connector of the solenoid valve of the desiccant.
FMI 7 The vehicle control unit receives signals from the “SET +” and “SET-” simultaneously. The signal wire is shorted to the power wire or the switch is faulty.
FMI 7 When you release the accelerator pedal, the control unit does not receive a signal from the idling switch number 2. Open power or signal wire. Shorting the signal wire to plus or ground. Damaged or oxidized pins in connectors. Perhaps a faulty switch integrated with the accelerator pedal.
FMI 7 The signal in the range of 0-13% of the idle switch does not flow to the vehicle control unit. Open power or signal wire. Shorting the signal wire to plus or ground. Damaged or oxidized pins in connectors. Perhaps a faulty switch integrated with the accelerator pedal.
FMI 3 The vehicle control unit detects a voltage above 4.8 V. A break in the ground wire. Shorting the signal wire to a plus. Damaged or oxidized pins in connectors. Possible defective moderator switch lever.
FMI 4 The vehicle control unit detects a voltage below 0.2 V. An interruption in the supply or signal wire. Closing the signal wire to ground. Damaged or oxidized pins in connectors. Possible defective moderator switch lever.
FMI 7 Error in the signal from the brake pedal sensor. Damaged, oxidized contacts or faulty sensor.
FMI 3 An abnormally high voltage is detected at terminal PB2 of the car control unit. Shorting the signal wire to a plus. Oxidation or high resistance. Faulty relay.
FMI 4 An abnormally low voltage is detected at terminal PB2 of the car control unit. Closing the signal wire to ground. Oxidation or high resistance. Faulty relay.
FMI 2 The vehicle control unit has detected that the requested gear does not match the actual one. Defective neutral position sensor on the gearbox.
FMI 3 The control unit of the car found that when reaching a speed above 50 km / h, the state of neutral position did not change. Broken wire mass sensor neutral position. Signal wire closure to plus.Oxidation or high resistance.
FMI 4 The control unit of the car found that when reaching a speed above 50 km / h, the state of neutral position did not change. Broken wire signal sensor neutral position. Shorting the signal wire to ground. Oxidation or high resistance.
FMI 3 The control unit of the car found that the position of the clutch pedal does not change when it reaches a speed above 50 km / h. Broken wire mass sensor. Signal wire closure to plus. Damaged, oxidized contacts or faulty sensor.
FMI 4 The control unit of the car found that the position of the clutch pedal does not change when it reaches a speed above 50 km / h. Broken wire signal sensor neutral position. Shorting the signal wire to ground. Oxidation or high resistance.
FMI 3 An abnormally high voltage is detected at terminal PB4 of the car control unit. Mass wire breakage. Shorting the signal wire to a plus. Oxidation or high resistance.
FMI 4 An abnormally low voltage is detected at the vehicle control unit PA8 terminal. Closing the signal wire to ground. Oxidation or high resistance.
FMI 3 An abnormally high voltage is detected at terminal PB28 of the car control unit. Mass wire breakage. Shorting the signal wire to a plus. Oxidation or high resistance.
FMI 4 An abnormally low voltage is detected on the contact PВ28 of the car control unit. Closing the signal wire to ground. Oxidation or high resistance.
FMI 2 General failure. Switch off the ignition for at least 1 minute. If the error is active, reprogram the control unit.
FMI 3 An abnormally high voltage is detected at terminal PB16 of the car control unit. Mass wire breakage. Shorting the signal wire to a plus. Oxidation or high resistance.
FMI 4 An abnormally low voltage is detected on the PV16 contact of the car control unit. Closing the signal wire to ground. Oxidation or high resistance.
FMI 3 The vehicle control unit registers at the PB16 contact from the solenoid power take-off valve a high voltage or voltage equal to the battery voltage. Shorting the wire between the solenoid valve and the control unit to a higher voltage, or the solenoid valve is faulty.
FMI 4 The vehicle control unit registers a voltage below 2.3 V at the PB16 contact from the solenoid power take-off valve. An open wire to the solenoid valve or a wire between the solenoid valve and the control unit. Short to ground between the solenoid valve and the control unit. Solenoid valve defective.
FMI 14 The SAE J1939 data channel of the CAN 1 network transmits messages that are not supported by the control unit in accordance with the vehicle configuration. Change car configuration.
FMI 14 The SAE J1939 data channel of the CAN 2 network transmits messages that are not supported by the control unit in accordance with the vehicle configuration. Change car configuration.
FMI 3 The vehicle control unit registers at the contact PB4 or PB3 a higher voltage or voltage equal to the voltage of the batteries. Signal wire closure to plus. Defective solenoid valve defective.
FMI 4 The vehicle control unit registers a voltage below 2.3 V at the PB4 or PB3 terminal. A break in the signal or supply wire. Shorting the signal wire to ground. Oxidation or high resistance. Defective solenoid valve defective.
FMI 3 The vehicle control unit registers at the contact PB4 or PB1 a higher voltage or voltage equal to the voltage of the batteries. Signal wire closure to plus. Defective solenoid valve defective.
FMI 4 The vehicle control unit registers a voltage below 2.3 V at the PB4 or PB1 terminal. A break in the signal or supply wire. Shorting the signal wire to ground. Oxidation or high resistance. Defective solenoid valve defective.
FMI 1 Air flow rate from the pneumatic system, at a speed of over 50 km / h, is higher than the allowable value. Air leaks in the vehicle or trailer system.
FMI 9 The vehicle control unit MID144 for 5 seconds does not receive signals via data channel SAE J1939 from the engine control unit MID128. Breakage or partial damage to the data channel wires. between the blocks.
FMI 9 MID144 does not receive a date and time message from the MID140 dashboard unit. Data link is broken or one of the control units is faulty.
FMI 9 The vehicle control unit MID144 for 5 seconds does not receive signals via data channel SAE J1939 from the control unit of the braking system MID136. Breakage or partial damage to the data channel wires. between the blocks.
FMI 9 The control unit MID144 for 5 seconds does not receive signals via data channel SAE J1939 from the control unit of the gearbox MID130. Breakage or partial damage to the data channel wires. between the blocks.
FMI 9 The vehicle control unit MID144 for 5 seconds does not receive signals via data channel SAE J1939 from the control unit of the retarder MID222. Breakage or partial damage to the data channel wires. between the blocks.
FMI 9 The vehicle control unit MID144 for 5 seconds does not receive signals via data channel SAE J1939 from the control unit selector gear MID223. Breakage or partial damage to the data channel wires. between the blocks.
FMI 9 The vehicle control unit (MID144) does not receive the vehicle weight message via the SAE J1939 data channel from the air suspension control unit MID150 for 5 seconds. Breakage or partial damage to the data channel wires. between the blocks.
FMI 9 Driving unit MID144 within 5 seconds does not receive the channel SAE J1939 data from external lighting control unit MID216. Breakage or partial damage to the data channel wires. between the blocks.
FMI 9 Driving unit MID144 within 5 seconds receives no communication channel SAE J1939 data from the control unit adaptive cruise control MID219. Breakage or partial damage to the data channel wires. between the blocks.
FMI 2, 9, 14 The control unit MID144 for 5 seconds does not receive messages via the data channel SAE J1939 from the control unit tachograph MID220. Breakage or partial damage to the data channel wires. between the blocks.
FMI 9 Driving unit MID144 within 5 seconds does not receive the channel SAE J1939 data from additional equipment MID249 control unit. Breakage or partial damage to the data channel wires. between the blocks.
FMI 9 The control unit of the car MID144 within 5 seconds does not receive messages via the data channel SAE J1939 from the control unit of the air dryer MID185. Breakage or partial damage to the data channel wires. between the blocks.
FMI 4 Incorrect software restart. Power outages, software malfunctions, or strong electromagnetic interference.
FMI 5 Incorrect interruption of the program due to a power failure. There was no power for at least 10 seconds when the ignition is on. Breakage or partial damage to the power cord or ground of the vehicle control unit .
FMI 12 Serious software malfunction and software restarted. Software error or strong electromagnetic interference. Reprogram the vehicle control unit first, if the fault persists, replace the vehicle control unit.
FMI 2 The vehicle control unit does not communicate with the tachograph control unit via data channel SAE J1939. Breakage of wires between the car control unit and the tachograph. A short to ground between the car control unit and the tachograph.

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