FMS Fields (Trucks / J1939)
Standard fields for heavy-duty vehicles.
| Name | Field ID | Type | Size | Description |
| FMS_FUEL_LEVEL_2 | 50 | integer | 1 | SPN 38. Fuel Level (secondary tank). |
| FMS_TOTAL_USED_FUEL | 88 | integer | 4 | SPN 250. Accumulated amount of fuel used during vehicle operation (L). |
| FMS_FUEL_LEVEL | 89 | integer | 1 | SPN 96. Fuel Level (primary/total). |
| FMS_AXLE_LOCATION | 90 | integer | 1 | SPN 928. Used to identify which axle the information applies to. |
| FMS_AXLE_WEIGHT | 91 | integer | 4 | SPN 582. Axle weight: Total mass imposed by the tires on the road surface. |
| FMS_ENGINE_HOURS | 92 | integer | 4 | SPN 247. Engine total hours of Operation. |
| FMS_VEHICLE_ID | 93 | string | 200 | SPN 237. Vehicle Identification Number (VIN). |
| FMS_SOFTWARE_ID | 94 | string | 4 | SPN 2806. Software version number in format ab.cd. |
| FMS_TOTAL_DISTANCE | 95 | integer | 4 | Total distance. |
| FMS_NEXT_SERVICE | 96 | integer | 3 | Next service distance. |
| FMS_ENGINE_COOLANT_TEMP | 97 | integer | 2 | SPN 110. Engine Coolant Temperature (°C). |
| FMS_INFORMATION | 98 | string | 255 | General FMS information string. |
| FMS_BRAKE_SWITCH | 180 | boolean | 1 | SPN 597. Brake Switch: Indicates if brake pedal is pressed. |
| FMS_CLUTCH_SWITCH | 181 | boolean | 1 | SPN 598. Clutch Switch: Indicates if clutch pedal is pressed. |
| FMS_CRUISE_CONTROL_STATE | 182 | integer | 4 | SPN 527. Cruise Control States (Off, Hold, Accelerate, etc.). |
| FMS_DRIVER_IDS | 183 | string | 200 | Driver IDs (Requires FMS Reader 5.2). |
| FMS_FUEL_RATE | 184 | string | 128 | SPN 183. Amount of fuel consumed by engine per unit of time L/h. |
| FMS_INSTANT_FUEL_ECONOMY | 185 | string | 128 | SPN 184. Instantaneous Fuel Economy (km/L). |
| FMS_PTO_STATE | 186 | integer | 4 | SPN 976. Power Takeoff (PTO) state/mode. |
| FMS_SERVICE_DISTANCE | 187 | integer | 4 | SPN 914. Service distance: Distance before next service is required. |
| FMS_TACH_OVERSPEED | 188 | boolean | 1 | SPN 1614. Vehicle Overspeed: Exceeding legal limit set in tachograph. |
| FMS_TIRE_LOCATION | 189 | integer | 4 | SPN 928. Tire Location: Position number of the tire. |
| FMS_VEHICLE_DISTANCE | 190 | integer | 4 | SPN 917. High resolution total vehicle distance. |
| FMS_WHEEL_SPEED | 191 | integer | 4 | SPN 84. Wheel Based Speed (km/h). |
| FMS_TOTAL_AXLE_WEIGHT | 192 | integer | 4 | Total axle weight (Requires FMS Reader 5.2). |
| FMS_ACCELERATOR_PEDAL_POSITION | 1631 | integer | 4 | SPN 91. Ratio of actual pedal position to max position. |
| FMS_ACTUAL_ENGINE_PERCENT_TORQUE | 1632 | integer | 4 | SPN 513. Calculated output torque of the engine. |
| FMS_ACTUAL_RETARDER_PERCENT_TORQUE | 1633 | integer | 4 | SPN 520. Actual braking torque of the retarder. |
| FMS_AFTERTREATMENT_1_DIESEL_EXHAUST_FLUID_TANK_1_LEVEL | 1634 | integer | 4 | SPN 1761. Ratio of diesel exhaust fluid volume to tank volume. |
| FMS_ALTERNATOR_STATUS_1 | 1635 | integer | 4 | SPN 3353. Alternator Status 1. |
| FMS_ALTERNATOR_STATUS_2 | 1636 | integer | 4 | SPN 3354. Alternator Status 2. |
| FMS_ALTERNATOR_STATUS_3 | 1637 | integer | 4 | SPN 3355. Alternator Status 3. |
| FMS_ALTERNATOR_STATUS_4 | 1638 | integer | 4 | SPN 3356. Alternator Status 4. |
| FMS_AMBIENT_AIR_TEMPERATURE | 1639 | integer | 4 | SPN 171. Temperature of air surrounding vehicle. |
| FMS_AT_LEAST_ONE_PTO_ENGAGED | 1640 | integer | 4 | SPN 3948. Indicates if at least one PTO is engaged. |
| FMS_BELLOW_PRESSURE_FRONT_AXLE_LEFT | 1641 | integer | 4 | SPN 1725. Bellow Pressure Front Axle Left (kPa). |
| FMS_BELLOW_PRESSURE_FRONT_AXLE_RIGHT | 1642 | integer | 4 | SPN 1726. Bellow Pressure Front Axle Right (kPa). |
| FMS_BELLOW_PRESSURE_REAR_AXLE_LEFT | 1643 | integer | 4 | SPN 1727. Bellow Pressure Rear Axle Left (kPa). |
| FMS_BELLOW_PRESSURE_REAR_AXLE_RIGHT | 1644 | integer | 4 | SPN 1728. Bellow Pressure Rear Axle Right (kPa). |
| FMS_BRAKE_PEDAL_POSITION | 1645 | integer | 4 | SPN 521. Ratio of brake pedal position to maximum (0% = no braking). |
| FMS_CAB_INTERIOR_TEMPERATURE | 1646 | integer | 4 | SPN 170. Cab interior temperature (°C). |
| FMS_COMBINATION_VEHICLE_WEIGHT | 1647 | integer | 4 | SPN 1760. Total weight of truck and all attached trailers. |
| FMS_CRUISE_CONTROL_ACTIVE | 1648 | integer | 4 | SPN 595. Cruise Control is switched on. |
| FMS_CURRENT_GEAR | 1649 | integer | 4 | SPN 523. Gear currently engaged or being shifted to. |
| FMS_DC_CHARGING_STATE | 1650 | integer | 4 | SPN 13171. Overall State of the DC charging system. |
| FMS_DIAGNOSTICS_SUPPORTED | 1651 | integer | 4 | SPN 2804. Status signal if FMS Gateway supports diagnostic messages. |
| FMS_DIRECTION_INDICATOR | 1652 | integer | 4 | SPN 1619. Indicates vehicle direction (0: Forward, 1: Reverse). |
| FMS_DRIVER_1_CARD | 1653 | integer | 4 | SPN 1615. Indicates presence of driver 1 card. |
| FMS_DRIVER_1_ID | 1654 | string | 64 | SPN 1625. Driver 1 Identification. |
| FMS_DRIVER_1_TIME_RELATED_STATES | 1655 | integer | 4 | SPN 1617. Indicates if driver 1 approaches working time limits. |
| FMS_DRIVER_1_WORKING_STATE | 1656 | integer | 4 | SPN 1612. State of work of driver 1 (Rest, Work, Drive, etc.). |
| FMS_DRIVER_2_CARD | 1657 | integer | 4 | SPN 1616. Indicates presence of driver 2 card. |
| FMS_DRIVER_2_ID | 1658 | string | 64 | SPN 1626. Driver 2 Identification. |
| FMS_DRIVER_2_TIME_RELATED_STATES | 1659 | integer | 4 | SPN 1618. Indicates if driver 2 approaches working time limits. |
| FMS_DRIVER_2_WORKING_STATE | 1660 | integer | 4 | SPN 1613. State of work of driver 2. |
| FMS_ENABLE_STATUS_DOOR_1 | 1661 | integer | 4 | SPN 3414. Door 1 enable status (passenger open capability). |
| FMS_ENABLE_STATUS_DOOR_2 | 1662 | integer | 4 | SPN 3417. Door 2 enable status. |
| FMS_ENABLE_STATUS_DOOR_3 | 1663 | integer | 4 | SPN 3420. Door 3 enable status. |
| FMS_ENABLE_STATUS_DOOR_4 | 1664 | integer | 4 | SPN 3423. Door 4 enable status. |
| FMS_ENABLE_STATUS_DOOR_5 | 1665 | integer | 4 | SPN 3426. Door 5 enable status. |
| FMS_ENABLE_STATUS_DOOR_6 | 1666 | integer | 4 | SPN 3429. Door 6 enable status. |
| FMS_ENABLE_STATUS_DOOR_7 | 1667 | integer | 4 | SPN 3432. Door 7 enable status. |
| FMS_ENABLE_STATUS_DOOR_8 | 1668 | integer | 4 | SPN 3435. Door 8 enable status. |
| FMS_ENABLE_STATUS_DOOR_9 | 1669 | integer | 4 | SPN 3438. Door 9 enable status. |
| FMS_ENABLE_STATUS_DOOR_10 | 1670 | integer | 4 | SPN 3441. Door 10 enable status. |
| FMS_ENGINE_OIL_PRESSURE | 1671 | integer | 4 | SPN 100. Engine Oil Pressure (kPa). |
| FMS_ENGINE_OIL_TEMPERATURE_1 | 1672 | integer | 4 | SPN 175. Engine Oil Temperature (°C). |
| FMS_ENGINE_PERCENT_LOAD_AT_CURRENT_SPEED | 1673 | integer | 4 | SPN 92. Engine Percent Load at Current Speed. |
| FMS_ENGINE_SPEED | 1674 | integer | 4 | SPN 190. Actual engine speed (RPM). |
| FMS_FUEL_SUPPLY_ESTIMATED_REMAINING_DISTANCE | 1675 | integer | 4 | SPN 8428. Estimated remaining distance based on fuel supply. |
| FMS_FUEL_TYPE | 1676 | integer | 4 | SPN 5837. Fuel type (Gasoline, Diesel, Electric, etc.). |
| FMS_HANDLING_INFORMATION | 1677 | integer | 4 | SPN 1621. Handling Info (e.g., 'no driver card'). |
| FMS_HIGH_RESOLUTION_FUEL_CONSUMPTION | 1678 | integer | 4 | SPN 5054. High resolution engine total fuel used (L). |
| FMS_HVESS_TMS_STATUS | 1679 | integer | 4 | SPN 8235. High Voltage Energy Storage System Thermal Management Status. |
| FMS_HVESS_TOTAL_ENERGY_THROUGHPUT | 1680 | integer | 4 | SPN 8211. HVESS Total Energy Throughput (Watt). |
| FMS_HVESS_ESTIMATED_REMAINING_DISTANCE | 1681 | integer | 4 | SPN 15268. HVESS Estimated Remaining Distance. |
| FMS_HYBRID_BATTERY_PACK_REMAINING_CHARGE | 1682 | string | 64 | SPN 5464. Hybrid battery pack remaining charge (%). |
| FMS_LATERAL_ACCELERATION | 1683 | string | 64 | SPN 1809. Lateral Acceleration (m/s²). |
| FMS_LOCK_STATUS_DOOR_1 | 1684 | integer | 4 | SPN 3412. Lock Status Door 1. |
| FMS_LOCK_STATUS_DOOR_2 | 1685 | integer | 4 | SPN 3415. Lock Status Door 2. |
| FMS_LOCK_STATUS_DOOR_3 | 1686 | integer | 4 | SPN 3418. Lock Status Door 3. |
| FMS_LOCK_STATUS_DOOR_4 | 1687 | integer | 4 | SPN 3421. Lock Status Door 4. |
| FMS_LOCK_STATUS_DOOR_5 | 1688 | integer | 4 | SPN 3424. Lock Status Door 5. |
| FMS_LOCK_STATUS_DOOR_6 | 1689 | integer | 4 | SPN 3427. Lock Status Door 6. |
| FMS_LOCK_STATUS_DOOR_7 | 1690 | integer | 4 | SPN 3430. Lock Status Door 7. |
| FMS_LOCK_STATUS_DOOR_8 | 1691 | integer | 4 | SPN 3433. Lock Status Door 8. |
| FMS_LOCK_STATUS_DOOR_9 | 1692 | integer | 4 | SPN 3436. Lock Status Door 9. |
| FMS_LOCK_STATUS_DOOR_10 | 1693 | integer | 4 | SPN 3439. Lock Status Door 10. |
| FMS_LONGITUDINAL_ACCELERATION | 1694 | string | 64 | SPN 1810. Longitudinal Acceleration. |
| FMS_OPEN_STATUS_DOOR_1 | 1695 | integer | 4 | SPN 3413. Open Status Door 1. |
| FMS_OPEN_STATUS_DOOR_2 | 1696 | integer | 4 | SPN 3416. Open Status Door 2. |
| FMS_OPEN_STATUS_DOOR_3 | 1697 | integer | 4 | SPN 3419. Open Status Door 3. |
| FMS_OPEN_STATUS_DOOR_4 | 1698 | integer | 4 | SPN 3422. Open Status Door 4. |
| FMS_OPEN_STATUS_DOOR_5 | 1699 | integer | 4 | SPN 3425. Open Status Door 5. |
| FMS_OPEN_STATUS_DOOR_6 | 1700 | integer | 4 | SPN 3428. Open Status Door 6. |
| FMS_OPEN_STATUS_DOOR_7 | 1701 | integer | 4 | SPN 3431. Open Status Door 7. |
| FMS_OPEN_STATUS_DOOR_8 | 1702 | integer | 4 | SPN 3434. Open Status Door 8. |
| FMS_OPEN_STATUS_DOOR_9 | 1703 | integer | 4 | SPN 3437. Open Status Door 9. |
| FMS_OPEN_STATUS_DOOR_10 | 1704 | integer | 4 | SPN 3440. Open Status Door 10. |
| FMS_PARKING_BRAKE_SWITCH | 1705 | integer | 4 | SPN 70. Parking Brake Switch. |
| FMS_POSITION_OF_DOORS | 1706 | integer | 4 | SPN 1821. Signal indicating actual position of doors. |
| FMS_PROPULSION_SYSTEM_ACTIVE | 1707 | integer | 4 | SPN 7315. Propulsion System Active (Hybrid/EV ready). |
| FMS_RAMP_WHEEL_CHAIRLIFT | 1708 | integer | 4 | SPN 1820. Ramp/Wheel Chair Lift Position. |
| FMS_REQUESTS_SUPPORTED | 1709 | integer | 4 | SPN 2805. Status signal if FMS Gateway will respond to requests. |
| FMS_RETARDER_SELECTION_NON_ENGINE | 1710 | integer | 4 | SPN 1716. Retarder Selection (driver's selector position). |
| FMS_RETARDER_TORQUE_MODE | 1711 | integer | 4 | SPN 900. Retarder Torque Mode (Mode 0 = No request). |
| FMS_SELECTED_GEAR | 1712 | integer | 4 | SPN 524. Gear transmission attempts to achieve. |
| FMS_SERVICE_BRAKE_AIR_PRESSURE_CIRCUIT_1 | 1713 | integer | 4 | SPN 1087. Pneumatic pressure in brake circuit #1. |
| FMS_SERVICE_BRAKE_AIR_PRESSURE_CIRCUIT_2 | 1714 | integer | 4 | SPN 1088. Pneumatic pressure in brake circuit #2. |
| FMS_STATUS_2_OF_DOORS | 1715 | integer | 4 | SPN 3411. Composite indication of all bus door statuses. |
| FMS_STEERING_WHEEL_ANGLE | 1716 | string | 64 | SPN 1807. Steering wheel angle (rad). |
| FMS_SYSTEM_EVENT | 1717 | integer | 4 | SPN 1622. Indicates that a tachograph event has occurred. |
| FMS_TACHOGRAPH_PERFORMANCE | 1718 | integer | 4 | SPN 1620. Indicates tachograph performance/analysis. |
| FMS_TACHOGRAPH_VEHICLE_SPEED | 1719 | integer | 4 | SPN 1624. Speed registered by tachograph (km/h). |
| FMS_TOTAL_FUEL_USED_GASEOUS | 1720 | string | 64 | SPN 1040. Total gaseous fuel consumed (kg). |
| FMS_TRANSMISSION_OIL_TEMPERATURE_1 | 1721 | integer | 4 | SPN 177. Transmission Oil Temperature (°C). |
| FMS_VEHICLE_MOTION | 1722 | integer | 4 | SPN 1611. Vehicle motion detected (0/1). |
| FMS_WATER_IN_FUEL_INDICATOR_1 | 1723 | integer | 4 | SPN 97. Water In Fuel Indicator. |
| FMS_COOLANT_LEVEL | 1757 | integer | 1 | SPN 111. Engine Coolant Level (%) |
| FMS_ENGINE_OIL_LEVEL | 1758 | integer | 1 | SPN 98. Engine Oil Level (%) |
| FMS_FUEL_LEVEL_TOTAL | 1759 | integer | 1 | Combined fuel level from all tanks |
| FMS_BRAKE_LINING_WEAR_FL | 1760 | integer | 1 | SPN 1166. Brake lining wear Front Left |
| FMS_BRAKE_LINING_WEAR_FR | 1761 | integer | 1 | SPN 1167. Brake lining wear Front Right |
| FMS_BRAKE_LINING_WEAR_RL | 1762 | integer | 1 | SPN 1168. Brake lining wear Rear Left |
| FMS_BRAKE_LINING_WEAR_RR | 1763 | integer | 1 | SPN 1169. Brake lining wear Rear Right |
| FMS_TELLTALE_STATUS | 1764 | integer | 4 | SPN 1213. Dashboard indicator lamp status block |
| FMS_PTO_FUEL_USED | 1765 | integer | 4 | Fuel consumed during PTO operation (L) |
| FMS_TOTAL_CO2_EMISSIONS | 1766 | integer | 4 | Accumulated CO2 produced (kg) |
| FMS_INSTANT_CO2_EMISSIONS | 1767 | integer | 2 | Real-time CO2 emission rate |
| FMS_ADBLUE_LOW_LEVEL_INDICATOR | 1768 | boolean | 1 | Specific warning for low AdBlue level |
| FMS_ENGINE_TORQUE_AT_SPEED | 1769 | integer | 1 | Torque at current engine speed |
| FMS_PARK_BRAKE_RELEASE_PRESSURE | 1770 | integer | 2 | Air pressure to release park brake |
| FMS_DRIVER_1_DAILY_DRIVING_TIME | 1771 | integer | 2 | Total driving time in current 24h period (min) |
| FMS_DRIVER_2_DAILY_DRIVING_TIME | 1772 | integer | 2 | Total driving time for co-driver (min) |
| FMS_DRIVER_1_WEEKLY_DRIVING_TIME | 1773 | integer | 2 | Total driving time in current week (min) |
| FMS_DRIVER_2_WEEKLY_DRIVING_TIME | 1774 | integer | 2 | Total driving time for co-driver week (min) |
| FMS_DRIVER_1_TIME_UNTIL_BREAK | 1775 | integer | 2 | Minutes remaining before mandatory break |
| FMS_KNEELING_INFORMATION | 1776 | integer | 1 | Bus kneeling system status (0/1) |
| FMS_STOP_REQUEST | 1777 | boolean | 1 | Passenger "Stop" button signal |
| FMS_WHEELCHAIR_REQUEST | 1778 | boolean | 1 | Passenger "Wheelchair" assistance signal |
| FMS_LIFT_UP_DOWN_STATUS | 1779 | integer | 1 | Status of wheelchair ramp/lift |
| FMS_DOOR_STATUS_ALL | 1780 | integer | 1 | Combined status of all passenger doors |
| FMS_ENGINE_PERCENT_TORQUE_DEMAND | 1781 | integer | 1 | Torque requested by the driver (%) |
| FMS_NOMINAL_FRICTION_TORQUE | 1782 | integer | 1 | Baseline friction torque of the engine (%) |
| FMS_AIR_SUSPENSION_CONTROL_STATUS | 1783 | integer | 1 | Status of the vehicle leveling system |
| FMS_DAILY_REST_TIME_DRIVER_1 | 1784 | integer | 2 | Cumulative rest time for Driver 1 (min) |
| FMS_DAILY_VEHICLE_DISTANCE | 1785 | integer | 4 | Distance traveled in current calendar day |
| FMS_FUEL_ECONOMY | 1786 | string | 32 | Average fuel economy (L/100km) |