In the heavy truck industry common acronyms like DPF, DTC, and ECM get thrown around every day. Whether you are reading a blog post, researching capabilities of a diagnostic tool, flipping through an OEM manual, or deciphering a wiring diagram, you are bound to come across one of the hundreds of different acronyms that populate this industry. With so many acronyms, it is nearly impossible to know them all. In this blog post, the team at Diesel Laptops has compiled a list of more than 900 industry acronyms that should help eliminate any confusion going forward no matter what type of heavy truck document you are reading.
Be sure to bookmark this page so you can quickly refer back to it...
1 BBL
1 Barrel Carburetor
2 BBL
2 Barrel Carburetor
3 BBL
3 Barrel Carburetor
4 BBL
4 Barrel Carburetor
A/T
Automatic Transmission
AAC
Auxiliary Air Control
AAT
Ambient Air Temperature
ABS
Anti-Lock Brake System
ACC
Accessory Key Position
ACERT
Advanced Combustion Emissions Reduction Technology
ACM
Air Bag Control Module
ACR-4
Air Conditioning Refrigerant, Recovery, Recycling, Recharging
ACT
Air Charge Temperature
AECM
Air Bag Electronic Control Module
AFR
Air Filter Restriction
AFRC
Air Fuel Ratio Control
AFS
Air-Fuel Ratio Sensor
AIR
Secondary Air Injection
AIR/AIRE
Secondary Air Injection (Belt Driven) / (Electric Driven)
AIRB
Secondary Air Injection Bypass
AIRD
Secondary Air Injection Diverter
AIS
Secondary Air Injection
AIT
Air Intake Temperature
ALDL
Assembly Line Diagnostic Link
ALSG
Automotive Limiting Speed Governor
AM1
Thermactor Air Management 1 (Tab)
AM2
Thermactor Air Management 2 (Tab Or Tad)
AMS
Air Management System
API
American Petroleum Institute
APK
Accelerator Pedal Kickdown
APP
Accelerator Pedal Position
APPS
Accelerator Pedal Position Sensor, Sometimes Simply Accelerator Position Sensor
APS
Accelerator Position Sensor
ARS
Automatic Restraint System
ASDM
Air Bag System Diagnostic Module
ASET
Application Specific Engine Technology
ASR
Automatic Slip Regulation
ATDC
After Top Dead Center
AUXT
Auxiliary Temperature
B+
Battery Positive Voltage
B10
Method Of Approximating Diesel Engine Service Life, See What Is B10 And B50 Life.
B20
Common Biodiesel Blend; 20% Biodiesel, 80% Petroleum Diesel.
B5
Common Biodiesel Blend; 5% Biodiesel, 95% Petroleum Diesel.
B50
Method Of Approximating Diesel Engine Service Life, See What Is B10 And B50 Life.
BAP
Barometric Atmosphere Pressure
BAR
Bureau Of Auto Repair
BARO
Barometric Absolute Pressure
BCAN
Bleed Carbon Canister
BCP
Brake Control Pressure
BCS
Boost Control Solenoid
BID
Breakerless Inductive Discharge
BPS
Brake Pressure Switch
BPT
Backpressure Transducer
BTDC
Before Top Dead Center
BVT
Backpressure Variable Transducer
BW
Borgwarner, Popular Transfer Case Manufacturer And Drivetrain Component Supplier For Various Automakers.
C3
Computer Command Control
C-4
Computer Controlled Catalytic Converter
CAB
Controller Anti-Lock Brake
CAC
Charge Air Cooler, Synonymous With Intercooler Or Aftercooler.
CACOT
Charge Air Cooler Outlet Temperature Can
CAN
Controller Area Network, Protocol For Diagnostic Systems
CAN-H
Controller Area Network High
CAN-L
Controller Area Network Low
CAP
Cold Ambient Protection
CARB
California Air Resources Board
CBD
Closed Bowl Distributor
CCA
Center Control Assembly
CCC
Converter Clutch Control Solenoid
CCCI
Computer Controlled Coil Ignition
CCD
Chrysler Collision Detection
CCD
Computer Controlled Dwell
CCECS
Computer Controlled Emission Control System
CCO
Converter Clutch Overdrive Solenoid
CCOSS
Crankcase Oil Separator Speed
CCOT
Cycling Clutch Orifice Tube
CCP
Carbon Canister Purge
CCPS
Crankcase Pressure Sensor
CCRM
Constant Control Relay Module
CCS
Coast Clutch Solenoid
CCS
Cruise Control Switches
CCV
Closed Crankcase Ventilation
CCV
Coolant Control Valve
CDI
Common Rail Direct Injection
CDR
Crankcase Depression Regulator
CDROM
Compact Disc Read Only Memory
CEC
Computerized Emission Control System
CFI
Continuous Fuel Injection
CFI
Central Fuel Injection (aka Throttle Body Fuel Injection)
CFM
Cubic Feet Per Minute
CFRM
Condenser Fan Relay Module
CFS
Cubic Feet Per Second
CID
Cubic Inch Displacement
CIS
Constant Injection System
CIS-E
Constant Injection System Electronic
CLECS
Closed Loop Emission Control System
CLFCS
Closed Loop Fuel Control System
CMFI
Central Multi-Port Fuel Injection
CMP-L
Camshaft Position Low
CMPO
Camshaft Position Out
CMTC
Compass/Mini-Trip Computer
CNG
Compressed Natural Gas
COO
Cruise On / Off Switch
CP3
Injection Pump Produced By Bosch, Found In Various Duramax And Common Rail Cummins Engines.
CP4
Injection Pump Produced By Bosch, Found In Various Modern Common Rail Diesels.
CPP
Clutch Pedal Position
CPS
Camshaft Position Sensor
CPU
Central Processing Unit
CRFS
Common Rail Fuel System
CSF
Crankshaft Speed Fluctuation
CSFI
Central Sequential Fuel Injection
CSFI
Cold Start Fuel Igniter
CSFS
Cold Start Fuel Solenoid
CTC
Coolant Temperature Compensation
CTOX
Continuous Trap Oxidizer
CTP
Closed Throttle Position
CVVT
Continuous Variable Valve Timing
DB2
Injection Pump Produced By Stanadyne, Found On Gm And International Idi Diesels.
DB4
Injection Pump Produced By Stanadyne, Found On 6.5L Gm Turbodiesels.
DCA
Diesel Coolant Additive
DCC
Diagnostic Connector, Cab
DCL
Data Communications Link
DCU
Diagnostic Connector, Underhood
DDE
Digital Diesel Electronics
DDEC
Detroit Diesel Engine Control
DDI
Direct Diesel Injection
DDI
Digital Direct Fuel Injection
DDS
Driveline Disengagement Switch
DEC
Diesel Electronic Engine Control System
DEEC
Diesel Engine Control
DERM
Diagnostic Energy Reserve Module
DFI
Digital Fuel Injection
DFI
Direct Fuel Injection
DIC
Driver Information Center
DIP
Diesel Injection Prechamber
DIS
Direct Ignition System
DIS
Distributorless Ignition System
DIT
Direct Injection Turbocharged
DME
Digital Motor Electronics
DMIVA
Distributor Mounted Ignition Vacuum Advance
DOC
Diesel Oxidation Catalyst
DOCIT
Diesel Oxidation Catalyst Intake Temperature
DOCOT
Diesel Oxidation Catalyst Outlet Temperature
DOHC
Dual Overhead Camshaft
DOR
Direct Ozone Reducing
DPF
Diesel Particulate Filter
DPFDP
Diesel Particulate Filter Differential Pressure
DPFE
Differential Pressure Feedback EGR
DPFIT
Diesel Particulate Filter Intake Temperature
DPFOT
Diesel Particulate Filter Outlet Temperature
DPR
Diesel Particle Reduction System
DRB
Diagnostic Readout Box
DRBII
Diagnostic Readout Box Ii
DRBIII
Diagnostic Readout Box Iii
DRL
Daytime Running Lamps
DSAS
Deceleration Spark Advance System
DSI
Down Stream Injection
DS-I
Dura Spark I Ignition System
DS-II
Dura Spark Ii Ignition System
DST
Detonation Sensitive Timing
DTC
Daignostic Trouble Code
DTRM
Diesel Thermo Recirculation Module
DVOM
Digital Volt Ohm Meter
E2PROM
Electrically Erasable Programmable Read Only Memory
E85
"85%" Ethanol ("15%" Gasoline) Fuel
EAIR
Electronic Secondary Air Injection
EAT
Electronically Controlled Automatic Transaxle Or Transmission
EBC
Exhaust Brake Controller
EBCM
Electronic Brake Control Module
EBL
Electric Back Lite (Rear Window Defroster)
EBP
Exhaust Back Pressure
EBPD
Exhaust Back Pressure Desired
EBPR
Exhaust Back Pressure Regulator
EBPV
Exhaust Back Pressure Valve
EBV
Exhaust Back Pressure Valve
ECA
Electronic Control Assembly
ECB
Engine Compression Brake
ECC
Electronic Calibration Code
ECCS
Electronic Concentrated Engine Control System
ECITS
Electronic Control Ignition Timing System
ECM
Electronic Control Module
ECM EIDP
Ecm External Identification Plate
ECM GND
Engine Control Module Ground
ECM IIDP
Ecm Internal Identification Plate
ECM PWR
Engine Control Module Power
ECP
Engine Certification Plate
ECP
Engine Coolant Pressure
ECS
Emission Control System
ECS
Engine Coolant System
ECSR
Engine Controlled Shutdown Request
ECT
Engine Coolant Temperature
ECT1
Engine Coolant Temperature 1
ECT2
Engine Coolant Temperature 2
ECTF
Cooling Fan Engine Coolant Temperature
ECU
Electronic Control Unit
ECUI
Electronically Controlled Unit Injection
EDC
Electronic Diesel Control
EDFI
Electronic Diesel Fuel Injection
EDI
Electronic Controlled Direct Ignition System
EDIS
Electronic Distributorless Ignition System
EEC
Electronic Engine Control
EEC-I
Electronic Engine Control I
EEC-II
Electronic Engine Control Ii
EEC-III
Electronic Engine Control Iii
EEC-IV
Electronic Engine Control Iv
EEC-V
Electronic Engine Control V
EEGR
Electronic Egr Valve
EEPROM
Electronically Erasable Programmable Read Only Memory
EET
Electronic Egr Transducer
EFC
Electronic Feedback Carburetor
EFC
Electronic Fuel Control
EFE
Early Fuel Evaporization
EFI
Electronic Fuel Injection
EFRC
Engine Family Rating Code
EFT
Engine Fuel Temperature
EGBP
Exhaust Gas Back Pressure
EGC
Electronic Gauge Cluster
EGDP
Exhaust Gas Differential Pressure
EGO
Exhaust Gas Oxygen Sensor
EGR
Exhaust Gas Recirculation
EGRC
Exhaust Gas Recirculation Control
EGRC
Exhaust Gas Recirculation Cooler
EGRH
Exhaust Gas Recirculation High Control
EGRL
Exhaust Gas Recirculation Low Control
EGROT
Exhaust Gas Recirculation Outlet Temperature Egrp
EGRP
Exhaust Gas Recirculation Position
EGRT
Exhaust Gas Recirculation Temperature
EGRTVV
Exhaust Gas Recirculation Thermal Vacuum Valve
EGT
Exhaust Gas Temperature (Typically Measured Before The Turbine Inlet Of The Turbocharger)
EGT1
Exhaust Gas Temperature 1
EGT2
Exhaust Gas Temperature 2
EGT3
Exhaust Gas Temperature 3
EIC
Electronic Instrument Cluster
EICU
Electronic Ignition Control Unit
EIDP
External Identification Plate
EIM
Engine Interface Module
EITC
Electronic Ignition Timing Control
ELB
Electronic Lean Burn System
ELC
Electronic Level Control
ELCD
Evaporative Loss Control Device
ELD
Electric Load Detector
ELS
Exhaust Lambda Sensor
EMI
Electromagnetic Interference
EMP
Exhaust Manifold Pressure
EMR
Electronic Module Retard
EMT
Exhaust Manifold Temperature
EOT
Engine Oil Temperature
EP
Exhaust Pressure, Exhaust Backpressure
EPA
Environmental Protection Agency
EPC
Electronic Pressure Control
EPR
Exhaust Back Pressure Regulator
EPROM
Erasable Programmable Read Only Memory
EPT
Egr Pressure Transducer
ESA
Electronic Spark Advance
ESC
Electronic Spark Control
ESC
Electronic System Controller
EST
Electronic Spark Timing
EST
Electronic Service Tool
ETA
Engine Timing Actuator
ETC
Electronic Temperature Control
ETC
Electronic Throttle Control
ETCS-i
Electronic Throttle Control System-Intelligent
ETP
Engine Throttle Position
ETV
Engine Throttle Valve
ETV-H
Engine Throttle Valve High
ETV-L
Engine Throttle Valve Low
ETW
Equivalent Test Weight
EVAP
Evaporative Emission Control System
EVIC
Electronic Vehicle Information Center
EVO
Electronic Variable Orifice
EVRT
Electronically Controlled Turbocharger
EVSV
Electronic Vacuum Switching Valve
EWPS
Engine Warning Protection System
EZL
Electronic Ignition System With Variable Characteristics
FDCS
Fuel Demand Command Signal
FDP
Fuel Delivery Pressure
FEEPROM
Flash Electrically Erasable Programmable Read Only Memory
FEL
Family Emissions Limit
FEPROM
Flash Erasable Programmable Read Only Memory
FFM
Fuel Filter Manager; A Fuel Filter Housing Assembly (Water Separator, Fuel Heater, Etc) Manufactured By Stanadyne For Variodiv Applications. One Style In Particular Is Found On 6.5L Gm Diesels.
FICM
Fuel Injection Control Module
FIDM
Feedback Injector Drive Module
FMEM
Failure Mode Effects Management
FMI
Failure Mode Identifier
FPCM
Fuel Injection Pump Control Module
FPCV
Fuel Pressure Control Valve
FPRC
Fuel Pressure Regulator Control
FSS
Flexible Service System
FVCV
Fuel Volume Control Valve
GAL/H
U.S. Gallons Per Hour
GAL/MIN
U.S. Gallons Per Minute
GCW
Gross Combined Weight
GCWR
Gross Combined Weight Rating
GPCM
Glow Plug Control Module
GTWR
Gross Trailer Weight Rating
GVWR
Gross Vehicle Weight Rating
HCI
Hydrocarbon Injection
HCU
Hydraulic Control Unit
HDC
Heavy Duty Emission Cycle
HEDF
High Electro Drive Fan
HEGO
Heated Exhaust Gas Oxygen Sensor
HEGR
High Efficiency Exhaust Gas Recirculation
HEST
High Exhaust System Temperature
HEUI
Hydraulic Electronic Unit Injector
HFAN
High Speed Cooling Fan
HFCM
Horizontal Fuel Conditioning Module Hg
HFM
Hot Film Air Mass Sensor
HO2S
Heated Oxygen Sensor
HPCAC
High-Pressure Charge Air Cooler
HPCR
High Pressure Common Rail
HPOP
High Pressure Oil Pump
HSC
High Swirl Combustion
HSIA
High Speed Inlet Air Control
HVAC
Heater Vent Air Conditioning
HVS
High Voltage Switch Ignition System
I/M
Inspection And Maintenance
IACV-AAC
Idle Air Control Valve-Auxiliary Air Control Valve
IAHD
Intake Air Heater Diagnostic
IAHR
Intake Air Heater Relay
IAP
Injection Actuation Pressure
IAT
Intake Air Temperature
IC
Intercooler (Synonymous With Charge Air Cooler Or Aftercooler)
ICG1
Injector Control Group 1
ICG2
Injector Control Group 2
ICM
Ignition Control Module
ICP
Injector Control Pressure
ICPR
Injection Control Pressure Regulator
ICS
Ignition Control System
ICTO
Ignition Coolant Temperature Override
IDI
Indirect Diesel Injection
IDM
Ignition Diagnostic Monitor
IDM
Injector Drive Module
IDS
Integrated Diagnostic System
IFI
Indirect Fuel Injection
IFP
Injection Fuel Pressure
IIDD
Internal Identification Data
IIDP
Internal Identification Plate
ILEV
Inherently Low Emissions Vehicle
IMAT
Intake Manifold Air Temperature
IMP
Intake Manifold Pressure
IMRC
Intake Manifold Runner Control
IMRP
Injector Metering Rail Pressure
IMT
Intake Manifold Temperature
IOD
Ignition Current Off Draw
IP
Injection Pump Or Injector Pump
IPR
Injection Pressure Regulator
ISB
Interact System B (B Series), Name Of The 5.9L, 24 Valve Cummins.
ISIS
International® Service Information Solutions
ISO9141
International Standards Organization Obdii Communication Mode
ITP
Internal Transfer Pump
ITRP
Injector Timing Rail Pressure
ITV
Intake Throttle Valve
ITV-H
Intake Throttle Valve High Control
ITV-L
Intake Throttle Valve Low Control
ITVP
Intake Throttle Valve Position
IVS
Idle Validation Switch
J1850PWM
(Pulse Width Modulated) Sae Established Obd Ii Communication Standard Used By Ford Domestic Cars And Light Trucks. One Of Thrdiv Hardware Layers Defined By Obd Ii
J1850VPW
(Variable Pulse Width Modulated) Sae Established Obd Ii Communication Standard Used By Gm Cars And Light Trucks. One Of Thrdiv Hardware Layers Defined By Obd Ii
J1939-H
J1939 Data Link High
J1939-L
J1939 Data Link Low
J1962
Sae Established Standard For The Connector Plug Layout Used For All Obd Ii Scan Tools
J1978
Sae Established Standard For Obd Ii Scan Tools
J1979
Sae Established Standard For Diagnostic Test Modes
J2012
Sae Established Standard Accepted By Epa As The Standard Test Report Language For Emission Tests
JCT
Junction (Electrical)
JTEC
Jeep Truck Powertrain Control Module System
KM/L
Kilometers Per Liter
KOER
Key On Engine Running
LB/FT
Pounds Of Force Per Foot
LB/IN
Pounds Of Force Per Inch
LCD
Liquid Crystal Display
LDT1
Ldt < 6000#Gvwr, 0-3750#Lvw
LDT2
Ldt < 6000#Gvwr, 3751-5750#Lvw
LDT3
Ldt 6001-8500#Gvwr, 3751-5750#Alvw
LDT4
Ldt 6001-8500#Gvwr, 5751-8500#Alvw
LEV
Low Emissions Vehicle
LFAN
Low Speed Cooling Fan
LNG
Liquefied Natural Gas
LOAD
Calculated Load Value
LP
Lift Pump, Referring To The Low Pressure Fuel Pump On A Diesel Engine.
LPCAC
Low-Pressure Charge Air Cooler
LVW
Loaded Vehicle Weight
M/CCC
Modulated Converter Clutch Control
M/T
Manual Transaxle Or Transmission
MAP
Manifold Absolute Pressure
MCC
Manifold Catalytic Converter
MCCA
Message Center Control Assembly
MCS
Mixture Control System
MCU
Microprocessor Control Unit
MC-VAF
Measuring Core Volume Air Flow
MDFI
Mechanical Diesel Fuel Injection
MDP
Manifold Differential Pressure
MDV4
Mdv 8501 -10000#Gvwr
MDV5
Mdv 10001-14000#Gvwr
MEMCAL
Memory Calibration Unit
MEP
Mean Effective Pressure
MFI
Multiport Fuel Injection
MGP
Manifold Gauge Pressure
MIC
Mechanical Instrument Cluster
MIL
Malfunction Indicator Light (The "Check Engine Light" On Your Dash)
MLP
Manual Lever Position
MLUS
Modulator Lock-Up Solenoid
MSDS
Material Safety Data Sheet
MSM
Multiplex System Module
MST
Manifold Surface Temperature
MTA
Managed Thermactor Air
MUI
Mechanical Unit Injection
MUTII
Multi-Use Tool, Second Edition
NAC
Nitrogen Oxides (Nox) Absorbing Catalyst
NC
Normally Closed (Electrical)
NETS
Navistar Electronics Technical Support
NGS
New Generation Star Tester
NH30C
Ammonia Oxidation Catalyst
N-m
Newton Meters, A Metric Measurement Of Torque (Convertible To Ft-Lbs/Lb-Ft)
NO
Normally Open (Electrical)
NP
New Process Gear, Popular Manufacturer Of Transmission And Transfer Cases For Various Automakers. Purchased By Chrysler And Latdiv Merged With Gm'S Muncie Division.
NV
New Venture Gear, A Joint Venture Between Gm And Chrysler Resulting In The Production Of Various Transmissions And Transfer Casediv Company Was Essentially A Merger Of Gm'S Muncie And Chrysler'S New Process Gear Divisions.
NVRAM
Non Volatile Random Access Memory
O2SH
Oxygen Sensor Heater
OAT
Organic Acid Technology
OBDII
On Board Diagnostics II (New Style Adapter Plug In 1996 & Newer Vehicles)
OC
Oxidation Catalytic Converter
OEM
Original Equipment Manufacturer
ORVR
On Board Refueling Vapor Recovery
OSAC
Orifice Spark Advance Control
OTIS
Overhead Travel Information System
OWL
Oil/Water Warning Lamp
PAD
Passenger Air Bag Disable
PAIR
Pulsed Secondary Air Injection
PCI
Programmable Communication Interface
PCM
Powertrain Control Module
PCV
Positive Crankcase Ventilation
PDB
Positive Displacement Blower
PDC
Power Distribution Center
PFE
Pressure Feedback Egr
PGM-CARB
Programmed Carburetor
PGM-FI
Programmed Fuel Injection Control System
PGM-IG
Programmed Ignition
PID
Parameter Identification Descriptions
PIP
Profile Ignition Pickup
PMS
Particulate Matter Sensor
PNP
Park/Neutral Position
PRC
Pressure Regulator Control
PROM
Programmable Read Only Memory
PSI
Pounds Per Square Inch
PSIA
Pounds Per Square Inch Absolute
PSIG
Pounds Per Square Inch Gauge
PSP
Power Steering Pressure
PSPS
Power Steering Pressure Switch
PTEC
Powertrain Electronic Controller Management System
PTOX
Periodic Trap Oxidizer
PWM
Pulse Width Modulation
RABS
Rear Anti-Lock Braking System
RAP
Retained Accessory Power
RAPP
Remote Accelerator Pedal Position
RAS
Resume / Accelerate Switch (Speed Control) Repto
RDQS
Reductant Quality Sensor
REDOX
Reduction Oxidation Catalytic Converter
REGT
Recirculated Exhaust Gas Temperature
REPTO
Rear Engine Power Takeoff
RFI
Radio Frequency Interference
RON
Research Octane Number
RPM
Revolutions Per Minute
RPS
Revolutions Per Second
RSE
Radiator Shutter Enable
SAE
Society Of Automotive Engineers
SAE J1587 DL
Sae J1587 Data Link
SAE J1587 DL–
Sae J1587 Data Link Negative
SAE J1587 DL+
Sae J1587 Data Link Positive
SAE J1922 DL
Sae J1922 Data Link
SAE J1939 DL
Sae J1939 Data Link
SAE J1939 DL–
Sae J1939 Data Link Negative
SAE J1939 DL+
Sae J1939 Data Link Positive
SAE J1939 DL-H
Sae J1939 Data Link High
SAE J1939 DL-L
Sae J1939 Data Link Low
SAE J1939 SHLD
Sae J1939 Data Link Shield
SBEC
Single Board Engine Control
SCA
Supplemental Coolant Additive
SCC
Spark Control Computer
SCCS
Speed Control Command Switches
SCPI
Sequential Central Port Fuel Injection
SCR
Selective Catalytic Reduction
SCRC
Selective Catalytic Reduction-Urea/Ammonia
SCRC-NH3
Selective Catalytic Reduction-Urea/Ammonia
SCR-N
Selective Catalytic Reduction-Urea/Ammonia
SCR-U
Selective Catalytic Reduction-Urea/Ammonia
SCS
Speed Controlled Spark
SES
Service Engine Soon Dash Light
SFI
Sequential Fuel Injection
SFT
Supply Fuel Temperature
SFTP
Supplementary Federal Test Procedure
SID
Subsystem Identification Descriptions
SIG CNDB
Signal Ground Body
SIG GNDC
Signal Ground Chassis
SIG GNDE
Signal Ground Engine
SKIM
Smart Key Immobilizer Module
SMEC
Single Module Engine Control
SOHC
Single Overhead Camshaft
SPCS
Spark Plug Switching Control System
SPI
Serial Peripheral Interface
SPN
Suspect Parameter Number
SRI
Service Reminder Indicator
SRS
Supplemental Restraint System
SRT
System Readiness Test
STAR
Self-Test Automatic Readout
SULEV
Super Ultra Low Emissions Vehicle
SVO
Special Vehicle Operations
TAB
Thermactor Air Bypass Vacuum Solenoid Valve
TAC
Tachometer Output Signal
TAC
Throttle Actuator Control
TACH
Tachometer Output Signal
TAD
Thermactor Air Diverter Vacuum Solenoid Valve
TBI
Throttle Body Injection
TC2CIS
Turbocharger 2 Compressor Intake Sensor
TCC
Torque Converter Clutch
TCCP
Torque Converter Clutch Pressure
TCM
Transmission Control Module
TCS
Transmission Controlled Spark
TCWC
Turbocharger Wastegate Control
TDE
Transmission Driving Engaged
TFI-I
Thick Film I Ignition System
TFI-IV
Thick Film Iv Ignition System
TFT
Transmission Fluid Temperature
TI
Transistor Ignition System
TLEV
Transitional Low Emission Vehicle
TOP
Transmission Oil Pressure
TOSS
Transmission Output Shaft Speed
TOT
Transmission Oil Temperature
TPOUT
Throttle Position Output
TPS
Throttle Position Sensor
TRS
Transmission Regulated Spark
TSB
Technical Service Bulletin
TSS
Transmission Speed Sensor
TTS
Transaxle Temperature Switch
TTS
Transmission Tailshaft Speed
TVP
Throttle Valve Potentiometer
TVS
Thermal Vacuum Switch
TWC
Three Way Catalytic Converter
TWC+OC
Three Way + Oxidation Catalytic Converter
UCC
Underbody Catalytic Converter
UIC
Universal Integrated Circuit Ignition
ULEV
Ultra Low Emissions Vehicle
ULSD
Ultra Low Sulfur Diesel
VANOS
Double Variable Camshaft Control
VCM
Vehicle Control Module
VCRM
Variable Control Relay Module
VDC
Volts Of Direct Current
VEPS
Vehicle Electronic Programming System
VFD
Vacuum Fluorescent Display
VGT
Variable Geometry Turbocharger
VIC
Vehicle Information Center
VICS
Variable Inertia Charging System
VIN
Vehicle Identification Number
VIT
Vehicle Interface Tool
VLS
Vehicle Limiting Speed
VLSG
Vehicle Limiting Speed Governor
VNT
Variable Nozzle Turbocharger
VOP
Valve Opening Pressure
VP-20
Bosch Vp-20 Diesel Engine Control System
VPM
Vehicle Personality Module
VRE
Vehicle Retarder Enable
VREF1
Reference Voltage Engine
VREF2
Reference Voltage Chassis
VREF3
Reference Voltage Chassis
VREF4
Reference Voltage Aftertreatment
VRV
Vacuum Regulator Valve
VSG
Variable Speed Governor
VSS_CAL
Vehicle Speed Output
VSS-H
Vehicle Speed Sensor High
VSS-L
Vehicle Speed Sensor Low
VTEC
Variable Valve Timing & Valve Lift Electronic Control
VTSS
Vehicle Theft Security System
VVT
Variable Valve Timing
VVTi
Variable Valve Timing With Intelligence
VVTL-i
Variable Valve Timing & Lift Intelligence
WAC
Wide Open Throttle A/C Cutoff
WCC
Warm-Up Catalytic Converter
WCC
Wastegate Control Circuit
WOTPS
Wide Open Throttle Position Switch
WR-H02S
Wide Range/Linear/Heated Air-Fuel Ratio Sensor
WTEC
World Transmission Electronically Controlled Automatic Transmissions (Allison)
WU-OC
Warm Up Oxidation Catalytic Converter
WU-TWC
Warm Up Three Way Catalytic Converter
ZEV
Zero Emissions Vehicle
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