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Terms & Abbreviations |
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| AALC | Automatic Axle-Lift Control |
| ABS | Anti-lock Braking System |
| ACC | Adaptive Cruise Control |
| ACM | Aftertreatment Control Module |
| AFS | Agility Fuel System |
| ALT | Alternator |
| APCU | Application Platform Control Unit |
| APS | Adaptive Power Steering |
| ASA | Additional Steering Axle |
| aSAM | Advanced Signal Actuation Model |
| ATA | Anti-Theft Alarm System |
| Backbone | The main J1939 datalink wiring that lies between the two terminating resistors. It does not include the branch circuits to each ECU or to the diagnostic connector. |
| Baud Rate | The rate at which data is transmitted in bits per second. |
| BESO | Battery Emergency Switch Off |
| BHM | Bulk Head Module |
| BMS | Battery Management System |
| BRC | Brake Chopper |
| Cabin CAN | A proprietary datalink connecting certain ECUs on the vehicle, specifically the CGW, MSF, SAM Cab, and SAM Chassis. |
| CAN | Controller Area Network |
| CAN ID | The identifier for a specific message, which also contains the source address of the sending ECU communicating on the J1939 datalink. |
| CCM | Coverter Control Module |
| CCS | Combined Charging System |
| CDCM | Central Door Control Module |
| CDS | Central Data Storage |
| CGW | Central Gateway |
| CHM | Chasis Module |
| CL | Change Lever |
| CLCP | Chassis Level Control Panel Cabin |
| CLCS | Chassis Level Control System |
| CLPB | Chassis Level ControlPanel Body |
| CLS | Continuos Leveling Sensor |
| COM | Communications Interface |
| Communication Protocol | A set of rules governing communication between electronic devices. |
| COS | CAN Waterpump |
| CPC | Common Powertrain Controller (for M-B and DDC engines only). |
| CTP | Common Telematics Platform. |
| DA | Detroit Assurance |
| DAGW | Driver Assistance Gateway |
| Datalink | A collection of wires, connecting system components, through which data is transmitted. |
| Datalink Topology | The arrangement in which the nodes (ECUs) of a datalink are connected to each other. |
| DCB | DC Charger |
| DCL | DC / DC Converter |
| DCMD | Door Control Module Driver |
| DCMP | Door Control Module Passenger |
| DCPD | Door Control Panel Driver |
| DCU | Dosing Control Unit |
| DDDL | Detroit Diesel Diagnostic Link |
| DFC | Driver Facing Camera |
| DG | Gauges |
| Diagnostic CAN | Datalink that runs from the diagnostic connector to the CGW. |
| Diagnostic Connector | A 9-pin diagnostic connector is used for troubleshooting the electrical system. |
| DMS | Driver Monitoring System |
| DSRC | DedicatedShort-Range Comunications |
| DCPD | Door Control Panel Driver |
| DCU | Dosing Control Unit |
| DFC | Driver Facing Camera |
| DG | Gauges |
| DMS | Driver Monitoring System |
| DSRC | Dedicated Short-Range Communications |
| EAPU | Electric Air Processing Unit |
| EBS | Electronig Brake System |
| ECAS | Electronig Control Air Suspension |
| ECM | Engine Control Module |
| ECP | Electronically Controlled Pneumatics |
| ECPC | eDrive Common Powertrain Controller |
| ECU | Electronic Control Unit, typically connected to a datalink. |
| EDAC | Electric Driven Air Compressor |
| EGR | Echaust Gas Recirculation |
| EHPS | Electrohydraulic Power Steering |
| EIS | Electronic Ignition Switch |
| EPAC | Electric Parking Air Conditioner |
| ERC | Electric Refrigerant Compressor |
| ESC | Electronic Stability Control |
| ESP | Electronic Stability System |
| ETCM | eDrive Transmission Control Module |
| EXV | Extexsion Vallve |
| FAM | Front Axle Modulator |
| FMI | Failure Mode Indicator. The part of a J1587, J1939, and CAN fault code that identifies how part of a device, or item on a device, failed. |
| FMS | Fleet Management System |
| FNPD | Finger Navigation Pad |
| GSM | Gear Selector Module |
| GW | Gateway |
| HAD | Hydraulic Auxiliary Drive |
| HAS | Hill Start Aid |
| HDEP | Heavy Duty Engine Platform |
| HLAL | Headlamp Auto Leveling |
| HSV | Hadley Smart Valve |
| HUS | Head Unit Screen |
| HVAC | Heating, Ventilation, and Air Conditioning |
| IBS | Intelligent Battery Sensor |
| IC | Instrument Cluster |
| ICS | Information and Communication System |
| ICU | Instrument Cluster Unit |
| ICUC | Instrument Cluster Unit Common |
| IMMO | Immobilizer |
| IMS | Interior Motion Sensor |
| I/O Controls | Input / Output controls allow a technician to activate and deactivate an input or output pin for troubleshooting purposes. |
| ISS | Ignition Switch Status |
| ITH | Independent Truck Heating |
| iTrac | eViscious Fan Clutch Controller |
| JM | Joystick Module |
| J1939 Terminating Resistors | The J1939 datalink has two 120-ohm terminating resistors, one at each end of the backbone. The total datalink parallel resistance is 60-ohms. |
| KLE | Keyless Entry |
| LAC | Lift Axle controller |
| LDW | Lane Departure Warning |
| LGEN | LIN Alternator |
| MCD | Mirror Camera Drive |
| MCM | Modular Switch Field |
| MCP | Mirror Camera Passenger |
| MFJB | MEGA® Fuse Junction Block |
| MGJB | Main Ground Junction Block |
| MID | Message Identifier. Indicates numeric assignment for a device that communicates on J1587. |
| MPC | Multi-Purpse Camera |
| MS | Maintenance System |
| MSF | Modular Switch Field |
| Multiplexing | Sending multiple electronic messages through the same signal path at the same time—in this case, through the CAN buses. |
| MUX | Multiplexor |
| NO | Normally Open |
| NC | Normally Closed |
| Off-board tool | Typically refers to a PC-based application that communicates with the vehicle datalinks via a connection to the diagnostic connector. |
| OBD | Onboard Diagnostics |
| OPC | Oil PumpController |
| Parameter | A parameter is a specific value that is assigned to a feature or function of the vehicle, and allows the customer to choose how that particular feature or function will work on the vehicle. |
| PBL | Parking Brake Lever |
| PCC | Predictive Cruise Control |
| PD | Predictive Diagnostic System |
| PDM | Power Distribution Module |
| PLVD | Progressive Low Voltage Disconnect |
| PMS | Particulate Matter Sensor |
| PPC | Predictive Powertrain Controller |
| PSM | Paramterizable Special Module |
| PTC | Positive Temperature Coefficient |
| PTI | Powertrain Inverter |
| PTX | Pressure Temperature Sensor |
| PWM | Pulse-Width Modulation |
| RAM | Rear Axle Modulator |
| RCM | Retarder Control Module |
| RDF | Radar Data Front |
| RLS | Rain Light Sensor |
| RPS | Redundant Power Supply |
| SA | Source Address; indicates numeric assignment for a device that communicates on J1939. |
| SAS | Steering Angle Sensor |
| SAE | Society of Automotive Engineers |
| SAM | Signal Detect and Actuation Module |
| SAM Cab | Signal Detect and Actuation Module Cab ("SAM Cabin"); this ECU controls mainly cab-related functionality. |
| SAM Chassis | Signal Detect and Actuation Module Chassis; this ECU controls mainly chassis-related functionality. |
| SAS | Steering Angle Sensor |
| SCA | Sensor and Actuator Module, Cab (SAMCab) |
| SCH | Sensor and Actuator Module, Chassis (SAMChassis) |
| SCR | Selective Catalytic Reduction |
| SDP | Safety Direct Processor |
| SFU | Switch Field Unit |
| SID | Subsystem Identifier |
| SMK | Smart Key |
| SPN | Suspect Parameter Number. The part of a J1939 or CAN fault code that identifies how part of a device, or item on a device, failed. |
| SRA | Range Group Sensor |
| SRR | Short-Range Radar |
| SRS | Supplemtal Restraint System |
| sSAM | Single Signal Actuation Module |
| SSL | Stalk Switch Left |
| SSR | Stalk Switch Right |
| STCU | Special Truck Control Unit |
| STHU | Special Truck Head Unit |
| SWB | Steering Wheel Button |
| TCC | Truck Control Center |
| TCM | Transmission Control Module |
| TCO | Tachograph |
| TJA | Radiator Shutters |
| TP | Telematics Platform |
| TPA | Tire Pressure Antenna |
| TPMS | Tire Pressure Monitoring System |
| UDS | Unified Diagnostics Service |
| UQS | Urea Quality Sensor |
| VRDU | Video Radar Decision Unit |
| VS | Video Switch |
| VT | Virtual Technician |
| WIF | Water In Fuel |
| MSPC | Wireless Smartphone Connection |
| XMC | Extension Module Controller |
