MID144 Volvo VECU Fault Codes | Truckmanualshub.com (2024)

Deciphering diagnostic trouble codes for VECU MID 144 Volvo control units

MID 144 PID 29

Parameter:

Accelerator pedal sensor number 2 (only for cars with dual controls)

Fault:

FMI 3The 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 4The signal voltage from the pedal sensor is below 0.4 V. Breakage of the signal or supply wire.Shorting the signal wire to ground.Thepedal sensormay befaulty.

MID 144 PID 46

Parameter:

Air pressure in the primary receiver (only for cars with air suspension)

Fault:

FMI 0The 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 thedryer 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 1The 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 3The 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 sensormay befaulty (the sensor is located behind the instrument panel on the right).

FMI 4The 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 sensormay befaulty.

FMI 14It appearswhen 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.

MID 144 PID 84

Parameter:

Car speed signal

Fault:

FMI 2There 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 therewere manipulations with the speed sensor or with the wiring between the speed sensor on the gearbox and the tachograph.

FMI 14Tachograph speed signals are not correct.Damaged wiring.Perhapsdefective speed sensor on the gearbox or tachograph.

MID 144 PID 86

Parameter:

Set speed (cruise control)

Fault:

FMI 14The 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.TheACC unitmay befaulty.

MID 144 PID 91

Parameter:

Accelerator pedal position

Fault:

FMI 3The 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.Thepedal position sensor or the idle switch No. 1 pedalmay befaulty.The sensor and switches are integrated with the accelerator pedal.

FMI 4The 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 sensormay befaulty.

FMI 5The 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 6The 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 14Malfunction in the power circuit.Breakage or partial damage to the power cord.

MID 144 PID 150

Parameter:

Power takeoff

Fault:

FMI 4The 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.Thesolenoid valvemay befaulty.

MID 144 PID 152

Parameter:

The number of reinstalls car control unit

Fault:

FMI 12The 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.

MID 144 SID 230

Parameter:

Idle switch № 1 accelerator pedal

Fault:

FMI 7The 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 afaulty switch integrated with the accelerator pedal.

MID 144 SID 231

Parameter:

SAE J1939 data feed

Fault:

FMI 2The 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 12The 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.

MID 144 SID 250

Parameter:

SAE J1708 data feed

Fault:

FMI 2Errors in messages on the data channel SAE J1708.Partial damage to the data channel wiring.

MID 144 SID 253

Parameter:

Gauge EEPROM Memory

Fault:

FMI 2Programming error or control unit memory chip is faulty.Try to reprogram the unit (performed only on authorized service stations).

FMI 14Data errorFaulty memory chip in control unit or software error.Try to reprogram the unit (performed only on authorized service stations).

MID 144 PPID 3

Parameter:

Starter relay

Fault:

FMI 3Very strong current through the power stage.Short to power plus.Faulty wiring or short circuit in the relay coil.

FMI 4Faulty relay, wire break or short to ground.

MID 144 PPID 61

Parameter:

Retarder switch

Fault:

FMI 7Faulty wiring or switch.

MID 144 PPID 69

Parameter:

Buffered Idle Switch

Fault:

MID 144 PPID 70

Parameter:

Power supply for accelerator, brake and clutch pedal switches

Fault:

FMI 4The 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.

MID 144 PPID 71

Parameter:

Power to the retarder and cruise control switches

Fault:

FMI 4The 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 switchesmay befaulty.

MID 144 PPID 72

Parameter:

Power supply for accelerator pedal sensor and retarder switch

Fault:

FMI 3The 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.Theretarder switch or the accelerator pedal sensormay befaulty.Damaged or oxidized pins in connectors.

FMI 4The vehicle control unit has detected a voltage lower than 4.7 V on the power wire. Shorting of the power wire to ground.Theretarder switch or the accelerator pedal sensormay befaulty.

MID 144 PPID 73

Parameter:

Power supply air pressure sensor in the primary receiver (air suspension) and switch “Dynafleet”

Fault:

FMI 3The 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.Theair pressure sensormay befaulty (located behind the instrument panel on the right) or the “Dynafleet” switch.

FMI 4The vehicle control unit has detected a voltage lower than 4.7 V on the power wire. Shorting of the power wire to ground.Theair pressure sensormay befaulty (located behind the instrument panel on the right) or the “Dynafleet” switch.

MID 144 PPID 74

Parameter:

Power supply to the engine control unit EECU and the vehicle control unit VECU

Fault:

FMI 3The 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 4The 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.

MID 144 PPID 75

Parameter:

Range Locking

Fault:

FMI 3The 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.Thesolenoid valvemay befaulty.

FMI 4The 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.Thesolenoid valvemay befaulty (located at the rear of the transmission on the range-cylinder cylinder).Damaged or oxidized pins in connectors.

MID 144 PPID 76

Parameter:

Brake Relay

Fault:

FMI 3The vehicle control unit registers a voltage of more than 6.5 V. A short to the power wire or a faulty relay.

MID 144 PPID 79

Parameter:

Range Locking, Solenoid Valve Condition

Fault:

FMI 3The 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 K8may befaulty (located on the central distribution board of the relay and fuses in the middle of the instrument panel).

FMI 4The 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 K8may befaulty (located on the central distribution board of the relay and fuses in the middle of the instrument panel).

MID 144 PPID 145

Parameter:

Block switches road information system “Dynafleet”.

Fault:

FMI 3The voltages on the power wire of the switch box are above 5 V. The wiring is damaged or the “Dynafleet” switch is faulty.

FMI 4The voltages on the power supply of the switch box are below 0.5 V. The wiring is damaged or the “Dynafleet” switch is faulty.

MID 144 PPID 265

Parameter:

Power supply vehicle speed sensor on the gearbox

Fault:

FMI 3The 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 4The 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.

MID 144 PPID 279

Parameter:

Dehumidifier filter

Fault:

FMI 0The life of the filter drier, calculated by the control unit of the car, is over.

MID 144 PPID 302

Parameter:

Condition of heating of mirrors

Fault:

FMI 3A short to a higher voltage or a faulty relay.

FMI 4Broken wire from relay or faulty relay.

FMI 12Faulty relay.

MID 144 PPID 312

Parameter:

Regeneration air dryer

Fault:

FMI 0Very high air flow ratedue toair leaks or frequent use of equipment that requires large amounts of compressed air to operate.

FMI 7The regeneration valve is openfor30 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.

MID 144 PPID 430

Parameter:

Regeneration air dryer

Fault:

FMI 0Very high air flow ratedue toair leaks or frequent use of equipment that requires large amounts of compressed air to operate.

MID 144 PSID 1

Parameter:

Retarder switch

Fault:

FMI 7The 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.

MID 144 PSID 2

Parameter:

Standby idle switch № 2 accelerator pedal (only for cars with automatic gear shifting)

Fault:

FMI 7When 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 afaulty switch integrated with the accelerator pedal.

MID 144 PSID 3

Parameter:

The switch of idling № 3 (for cars with an additional accelerator, with dual control)

Fault:

FMI 7The 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 afaulty switch integrated with the accelerator pedal.

MID 144 PSID 4

Parameter:

Retarder Switch Lever

Fault:

FMI 3The 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.Possibledefective moderator switch lever.

FMI 4The 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.Possibledefective moderator switch lever.

MID 144 PSID 5

Parameter:

Brake pedal sensor

Fault:

FMI 7Error in the signal from the brake pedal sensor.Damaged, oxidized contacts or faulty sensor.

MID 144 PSID 7

Parameter:

Speed threshold 2

Fault:

FMI 3An 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 4An 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.

MID 144 PSID 8

Parameter:

Neutral position

Fault:

FMI 2The vehicle control unit has detected that the requested gear does not match the actual one.Defective neutral position sensor on the gearbox.

FMI 3The 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 4The 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.

MID 144 PSID 9

Parameter:

Clutch pedal sensor

Fault:

FMI 3The 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 4The 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.

MID 144 PISD 10

Code

Pisd 10

Parameter:

Relay K41 reversing light

Fault:

FMI 3An 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 4An abnormally low voltage is detected at the vehicle control unit PA8 terminal.Closing the signal wire to ground.Oxidation or high resistance.

MID 144 PSID 11

Parameter:

Relay K42 braking signals

Fault:

FMI 3An 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 4An abnormally low voltage is detected on the contact PВ28 of the car control unit.Closing the signal wire to ground.Oxidation or high resistance.

MID 144 PSID 14

Parameter:

DatamaxError

Fault:

FMI 2General failure.Switch off the ignition for at least 1 minute.If the error is active, reprogram the control unit.

MID 144 PSID 19

Parameter:

Status of the parking brake (relay K15)

Fault:

FMI 3An 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 4An abnormally low voltage is detected on the PV16 contact of the car control unit.Closing the signal wire to ground.Oxidation or high resistance.

MID 144 PSID 20

Parameter:

Power takeoff signal

Fault:

FMI 3The 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 4The 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.

MID 144 PSID 21

Parameter:

CAN 1

Fault:

FMI 14The 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.

MID 144 PSID 22

Parameter:

CAN 2

Fault:

FMI 14The 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.

MID 144 PSID 23

Parameter:

Regeneration air dryer

Fault:

FMI 3The 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 4The 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.

MID 144 PSID 24

Parameter:

Air dryer, compressor control

Fault:

FMI 3The 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 4The 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.

MID 144 PSID 25

Parameter:

Air leak

Fault:

FMI 1Air 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.

MID 144 PSID 200

Parameter:

CommunicationfailureoverSAE J1939data linkwith MID128 engine control unit

Fault:

FMI 9The vehicle control unit MID144for5 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.

MID 144 PSID 202

Parameter:

CommunicationfailureoverSAE J1939data linkwith dashboard control unit MID140

Fault:

FMI 9MID144 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.

MID 144 PSID 204

Parameter:

CommunicationfailureoverSAE J1939data linkwith MID136 braking system control unit

Fault:

FMI 9The vehicle control unit MID144for5 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.

MID 144 PSID 205

Parameter:

CommunicationfailureoverSAE J1939 datapath with MID130 transmission control unit

Fault:

FMI 9The control unit MID144for5 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.

MID 144 PSID 206

Parameter:

CommunicationfailureoverSAE J1939data linkwith the retarder control unit MID222

Fault:

FMI 9The vehicle control unit MID144for5 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.

MID 144 PSID 207

Parameter:

CommunicationfailureoverSAE J1939data channelwith MID223 gear selector control unit

Fault:

FMI 9The vehicle control unit MID144for5 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.

MID 144 PSID 208

Parameter:

CommunicationfailureoverSAE J1939data channelwith MID150 air suspension control unit

Fault:

FMI 9The vehicle control unit (MID144)does not receive the vehicle weight message via the SAE J1939 data channel from the air suspension control unitMID150for5 seconds.Breakage or partial damage to the data channel wires.between the blocks.

MID 144 PSID 210

Parameter:

CommunicationfailureoverSAE J1939data channelwith MID216 outdoor lighting control unit

Fault:

FMI 9Driving unit MID144within5 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.

MID 144 PSID 211

Parameter:

CommunicationfailureoverSAE J1939data channelwith MID219 adaptive cruise control unit

Fault:

FMI 9Driving unit MID144within5 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.

MID 144 PSID 212

Parameter:

CommunicationfailureoverSAE J1939data channelwith tachograph control unit MID220

Fault:

FMI 2, 9, 14The control unit MID144for5 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.

MID 144 PSID 214

Parameter:

CommunicationfailureoverSAE J1939data channelwith MID249 option control unit

Fault:

FMI 9Driving unit MID144within5 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.

MID 144 PSID 227

Parameter:

CommunicationfailureoverSAE J1939data channelwith MID185 air dryer control unit

Fault:

FMI 9The control unit of the car MID144within5 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.

MID 144 PSID 230

Parameter:

Software failure

Fault:

FMI 4Incorrect software restart.Power outages, software malfunctions, or strong electromagnetic interference.

FMI 5Incorrect interruption of the programdue toa power failure.There was no powerforat least 10 seconds when the ignition is on.Breakage or partial damage to the power cord or ground of thevehiclecontrol unit.

FMI 12Serious 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.

MID 144 PSID 232

Parameter:

SAE J1939-2 data feed

Fault:

FMI 2The 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.