Toyota & Lexus
Acronyms, Glossary & Abbreviations
on Wiring Diagrams & Manuals
AB1,2,3,4 Supercharger Bypass Valve
ABV Supercharger Bypass Valve
VSV ADJ2 Ground
A/C SW A/C Switch Signal
A/C1 A/C Amplifier
ACIS Acoustic Control Intake System
ACIS ACIS VSV
ACMG A/C Magnetic Clutch Relay
ACT Air Conditioning
ACV A/C Idle Up Valve
AF+/- Air/Fuel ratio Sensor
AFL +/- Air/Fuel ratio Sensor
AFR +/- Air/Fuel ratio Sensor
AMC A/C Amplifier
(+B) Battery Power from EFI Relay
BATT Battery Power
B/M FR/HRT (Hi) Relay
CF A/C Pressure Switch relay
CG Chassis Ground
CL+/- Magnetic Clutch
CODE Transponder Key Amplifier
DI Fuel Pump Control
E1… Ground (Earth)
EFI+/- Traction Control ECU
EFI+/- Throttle ECU
EFIF EGLS EGR Valve Position
EGR EGR VSV for control EGR Valve (connect it to VCV or atmosphere).
EO1 Ground (Earth)
EOM Ground (Earth)
ELS Electric Load Sensor Circuit
ELS2 Integration Relay
ETC Throttle ECU
EVAP EVAP VSV
FC Fuel Pump Relay
FPU Fuel Pressure Up VSV
G Distributor
G+ Camshaft Position
G22+ Camshaft Position
HT1… Oxygen Sensor Heater Control
HTAF1… Air/Fuel Heater Control
IDL Throttle position Switch
IGF IGF Signal
IGSW Ignition Switch
IGT Igniter/Ignition Coil(s)
IMLD Theft Deterrent ECU
IMLD To Security Indicator light
ISCC IAC Stepper Motor
ISCO IAC Stepper Motor
KNK(L/R) Knock Sensor
KS MAF Meter Karmen Vortex Type
LOCK IN A/C Magnetic Clutch Lock
M+ M- Throttle Control Motor
MREL Main Relay
NCO +/- O/D Direct Clutch Speed
NE+ Crankshaft Position
NE- Camshaft/Crankshaft Position
NEO ABS and Traction ECU
NSW Starter Circuit
OD Overdrive Switch
OIL A/T Fluid Temp. Sensor
OMR Engine Oil Feeder Control Motor
OMT Engine Oil Feeder Control
Mtr Relay OX1,2, Oxygen Sensor
PIM Manifold Absolute Pressure
PM1 Turbo Pressure PMC Waste Gate Valve VSV PRG EVAP VSV PS SW Power Steering Switch PTNK Vapor Pressure Sensor Signal R Back Up Light Switch RSC IAC (Rotary Solenoid)
RSO IAC (Rotary Solenoid)
RXCK Transponder Key Amplifier
SDL Signal Data Line
SG Signal Ground
SDG Signal Data Ground
SMC Supercharger Magnetic Clutch
SPD Vehicle Speed
STA Park/Neutral Switch
STP Stop Light Switch
TC Data Link Connector 1
THA Intake Air Temp. Sensor
TE1… Data Link Connector 1
THG EGR Temperature
THW Engine Coolant Temp.
THWO A/C Amplifier
TPC Vapor Pressure Sensor VSV
TRC+/- Traction Control ECU
TXCT Transponder Key Amplifier
VC Voltage Control
VCV Vacuum Control Valve (on Vacuum Modulator Type EGR System)
VG MAF Hot Wire Type
VPA1,2 Accelerator Pedal Position
VS MAF Vane Type
VSV1 Intake Air Control VSV
VSV2 Exhaust Gas Control Valve
VSV3 Exhaust Bypass VSV
VTO1 Throttle ECU
VTO2 Throttle ECU
VTA1,2, Throttle Position
A/C Air Conditioning Air Conditioner
ACL Air Cleaner Air Cleaner
AIR Secondary Air Injection Air Injection (AI)
AP Acceleration Pedal –
B+ Battery Positive Voltage +B, Battery Voltage
BARO Barometric Pressure –
CAC Charge Air Cooler Intercooler
CAN Controller Area Network Controller Area Network
CARB Carburetor Carburetor
CCV CANISTER CLOSED VALVE
CFI Continuous Fuel Injection – CID Component Identification Data) Component Identification Data)
CKP Crankshaft Position Crank Angle
CL Closed Loop Closed Loop
CMP Camshaft Position Cam Angle
CPP Clutch Pedal Position – CTOX Continuous Trap Oxidizer –
CTP Closed Throttle Position Idle ON (IDL ON)
DFI Direct Fuel Injection (Diesel) Direct Injection (DI) DI Distributor Ignition –
DLC 1, 2, 3 Data Link Connector 1, 2, 3 1- Check Connector, 2 –Toyota Diagnosis Communication Link (TDCL), 3- OBDII diagnostic Connector DTC Diagnostic Trouble Code Diagnostic Code DTM Diagnostic Test Mode –
ECL Engine Control Level –
ECM Engine Control Module Engine ECU (Electronic Control Unit)
ECT Engine Coolant Temperature Coolant Temperature, Water Temperature, THW
EEPROM Electrically Erasable Programmable Read Only Memory Erasable Programmable Read Only Memory (EPROM)
EFE Early Fuel Evaporation Cold Mixture heater (CMH).
Heat control Valve (HCV)
EGR Exhaust Gas Recirculation Exhaust Gas Recirculation
EI Electronic Ignition Distributorless Ignition (DI)
EM Engine Modification Engine Modification (EM)
EPROM Erasable Programmable Read Only Mem Programmable Read Only Memory (PROM)
EVAP Evaporative Emission Evaporative Emission Control
FC Fan Control –
FEEPROMFlash Electrically Erasable Programmable Read Only Memory –
FEPROM Flash Erasable Programmable Read Only Memory –
FF Flexible Fuel –
FP Fuel Pump Fuel Pump
GEN Generator Alternator
GND Ground Ground
HO2S Heated Oxygen Sensor Heated Oxygen Sensor (HO2S)
IAC Idle Air Control Idle Speed Control (ISC)
IAT Intake Air Temperature Intake or Inlet Air Temperature
ICM Ignition Control Module –
IFI Indirect Fuel Injection Indirect Injection
IFS Inertia FuelShutOff –
ISC Idle Speed Control –
KS Knock Sensor Knock Sensor
MAF Mass Air Flow Air Flow Meter
MAP Manifold Absolute Pressure Manifold Pressure Intake Vacuum
MC Mixture Control Electric Bleed Air Valve (EBAV), Mixture Control Valve, Electric Air Control Valve (EACV)
MDP Manifold Differential Pressure
MFI Multiport Fuel Injection Electronic Fuel Injection (EFI)
MIL Malfunction Indicator Lamp Check Engine Light
MST Manifold Surface Temperature –
MVZ Manifold Vacuum Zone –
NVRAM Non-Volatile Random Access Memory –
NiMH Nickel Metal Hydride Nickel Metal Hydride
O2S Oxygen Sensor Oxygen Sensor, O2Sensor (O2S)
OC Oxidation Catalytic Converter Oxidation Catalyst Converter (CCO)
OBD On-Board Diagnostic On-Board Diagnostic (OBD) OIL – A/T Fluid Temp. Sensor
OP Open Loop Open Loop
PAIR Pulsed Secondary Air Injection Air Suction (AS)
PCM Powertrain Control Module –
PID Parameter Identifier Parameter Identifier
PNP Park/Neutral Position –
PROM Programmable Read Only Memory –
PSP Power Steering Pressure –
PTOX Periodic Trap Oxidizer Diesel Particulate Filter (DPF)
RAM Random Access Memory Random Access Memory
RM Relay Module –
ROM Read Only Memory Read Only Memory
RPM Engine Speed Engine Speed
SFI Sequential Multiport Fuel Injection Electronic Fuel Injection (EFI), Sequential Injection
SC Supercharger Supercharger
SCB Supercharger Bypass
SFI Sequential Multiport Fuel Injection Electronic Fuel Injection, Sequential Injection
SPL Smoke Puff Limiter –
SRI Service Reminder Indicator
SRT System Readiness Rest
ST Scan Tool
TB Throttle Body Throttle Body
TBI Throttle Body Fuel Injection Single Point Injection, Central Fuel Injection (CI)
TC Turbocharger Turbocharger
TCC Torque Converter Clutch Torque Converter
TCM Transmission Control Module TransmissionECU (Electronic Control Unit) THG – EGR Temperature
TID Test Identification Data
TP Throttle Position Throttle Position
TPC – Vapor Pressure Sensor
TR Transmission Range
TVV Thermal Vacuum Valve Bimetallic Vacuum Switching Valve (BVSX), Thermostatic Vacuum Switching Valve (TVSV)
TWC Three-Way Catalytic Converter Three-Way Catalytic (TWC), CCpo TWC+OC Three-Way + Oxidation Catalytic Converter CCR + CCO
VAF Volume Air Flow Air Flow Meter
VPS vapor pressure sensor
VR Voltage Regulator Voltage Regulator
VSS Vehicle Speed Sensor Vehicle Speed Sensor (Read Switch Type) VV1, 2
WOT Wide Open Throttle Full Throttle
WU-OC Warm Up Oxidation Catalytic Converter –
WUTWC Warm Up Three-Way Catalytic Converter Manifold Converter
3GR Third Gear
4GR Fourth Gear
ABS Anti-Lock Brake System
AC Alternating Current
ACC Accessory ACM Active Control Engine Mount System 1
ACIS Acoustic Control Induction System
ACSD Automatic Cold Start Device
ACV Air Control Valve (ACIS)
A.D.D. Automatic Disconnecting Differential
A/F Air/Fuel Ratio
AHC Active Height Control Suspension
ALR/ELR) Automatic Locking Retractor/Emergency Locking Retractor
ALT Alternator
AMP Amplifier
ANT Antenna APPROX. Approximately
ASL Automatic Sound Levelizer
ASV Air Switching Valve (Actuator)
A/T Automatic Transmission (Transaxle)
ATF Automatic transmission Fluid
AT-PZEV Advanced Technology Partial Zero Emission Vehicle
CF Cornering Force
CG Center of Gravity
CH Channel
CHMSL Center high-mount stop lamp
CLV Calculated Load Value
CNG Compressed Natural Gas
COMB. Combination
CPE Coupe
CPS Combustion Pressure Sensor
CPU Central Processing Unit
CRS Child Restraint System
CTR Center
C/V Check Valve
CV Control Valve
CVN Software Calibration Verification Number or Calibration Verification Number
CVT Continuously Variable Transmission
CW Curb Wight
DAC Downhill Assist Control
DC Direct Current
D-CAT Diesel Clean Advanced Technology
DCNI Data Communication Network Interface
DEF Defogger
DFL Deflector
DIFF. Differential
DIFF. LOCK Differential Lock
D/INJ Direct Injection
DLI Distributorless Ignition
DOHC Double Over Head Cam
DP Dash Pot DPNR Diesel
PM and NOx Reduction
DRL Daytime running lights
DS Dead Soak
DSP Digital Signal Processor
DVD Digital Versatile Disc
EBD Electronic Brake Force Distribution
ECAM Engine Control and Measurement System
ECB Electronically Controlled Braking System
ECD Electronic Controlled Diesel
ECDY Eddy Current Dynamometer
ECU Electronic Control Unit
ECT-i Electronically Controlled Transmission with intelligence (5-speed)
ED Electro-deposited Coating
EDIC Electric Diesel Injection Control
EDU Electronic Driving Unit
EFI Electronic Fuel Injection
E/G Engine
EGR-VM EGR Vacuum Modulator
ELR Emergency Locking Retractor
ENG Engine
ESA Electronic Spark Advance
ETCS Electronic Throttle Control System
ETCS-i Electronic Throttle Control System – intelligent
ETR Electronically Tuned Radio
EVP Evaporator
E-VRV Electric Vacuum regulating Valve
EXH Exhaust
FCHV Fuel Cell Hybrid Vehicle
FE Fuel Economy
FF Front-Engine Front-Wheel-Drive
F/G Fuel Gauge
FIPG Formed in Place Gasket
FL Fusible Link
F/P Fuel Pump
FPU Fuel Pressure Up
Fr Front
FT Fuel Trim
F/W Flywheel
FW/D Flywheel Damper
FWD Front-Wheel-Drive
GAS gasoline
GBS VIP Glass Breakage Sensor
GND Ground
GPS Global Positioning System
GVWR Gross Vehicle Weight Rating
HAC High Altitude Compensator
H/B Hatchback
HAC Hill Start Assist Control
HCAC 2 Hydrocarbon Adsorber Catalyst system
HI High
HID High Intensity Discharge (Head Lamp)
HSG Housing HSEA High Solar Energy-Absorbing
HT Hard Top
HWS Heated Windshield System
IAC Idle Air Control IC Integrated Circuit
IDI Indirect Diesel Injection
IFS Independent Front Suspension
IG Ignition IGBT Semiconductor Switching Device
IIA Integrated Ignition Assembly
IN Intake (Manifold, Valve)
INT Intermittent
I/P Instrumental Panel
IRS Independent Rear Suspension
J/B Junction Block
J/C Junction Connector
KD Kick-Down
LAN Local Area Network
LATCH Lower anchors and top tether brackets
LB Liftback
LCD Liquid Crystal Display
LED Light Emitting Diode
LH Left-Hand
LHD Left-Hand Drive
L/H/W Length, Height, Width
LLC Long-Life Coolant
LNG Liquefied Natural Gas
LO Low
LPG Liquefied Petroleum Gas
LSD Limited Slip Differential
LSP and BV Load Sensing Proportion and Bypass Valve
LSPV Load Sensing Proportion Valve
MAINT REQD Engine Oil replacement Reminder Light (USA only).
MAX. Maximum
MIC Microphone
MIL Malfunction Indicator Lamp
MIN. Minimum
MP Multipurpose
MPG Miles Per Gallon
MPX Multiplex communication System
MSRP Manufacturer’s Suggested Retail Price
M/T Manual Transmission
MT Mount
MTG Mounting
N Neutral
NA Natural Aspiration
No. Number
NVS Night View System
OCV Oil Control Valve (VVT-i) 3
O/D Overdrive
OEM Original Equipment Manufacturing
OHC Overhead Camshaft
OHV Overhead valve
OPT Option
O/S Oversize
P and BV Proportioning and Bypass Valve
PCS Power Control System
PCV Positive Crankcase Ventilation
PDS Pre-Delivery Service
PKV Parking Brake
PPS Progressive Power Steering
PS Power Steering
PSD Power-Split Device
PTO Power Take-Of
R and D Research & Development
R and P Rack and Pinion
R/B Relay Block RBS Reticulating Bal Type Steering
RDS Radio Broadcast Data System
R/F Reinforcement
RFS Rigid Front Suspension
RH Right-Hand
RHD Right-Hand Drive
RLY Relay
ROM Read Only Memory
Rr Rear
RR Rear-Engine Rear Wheel Drive
RSCA Link System (USA only)
RRS Rigid rear Suspension
RWD Rear-Wheel Drive
SDN Sedan
SEN Sensor
SICS Starting Injection Control System
SOC State of Charge
SOHC Single Overhead Camshaft
SPEC Specification
SPI Single Point Injection
SRS Supplemental Restraint System
SSM Special Service Material
SST Special Service Tools
STD Standard
STJ Cold-Start Fuel Injection
SULEV Super Ultra Low Emission Vehicle
SW Switch
SYS System
T/A Transaxle
TACH Tachometer
TBI Throttle Body Electronic Fuel Injection
TC Turbocharger
TCCS Toyota Computer Controlled System
TCV Timing Control Valve
TDC Top Dead Center
TDI Toyota Direct Ignition
TEMP. Temperature
TEMS Toyota Electronic Modulated Suspension
TFS Toyota Financial Services
THS Toyota Hybrid System
THC II Toyota Hybrid System 2tr
TID Test Identification Data
TIS Total Information System for Vehicle Development
T/M Transmission
TMC Toyota Motor Corporation
TMMK Toyota Motor Manufacturing Kentucky, Inc.
TRAC Traction Control System
TURBO Turbocharger
UART Universal Asynchronous Receiver Transmitter
U/D Underdrive
U/S Undersize
VCV Vacuum Control Valve
VENT Ventilator
VGRS Variable Gear Ratio Steering
VIN Vehicle Identification Number
VPS Variable Power Steering
VSC Vehicle Skid Control aka Vehicle Stability Control
VSV Vacuum Switching Valve
VSVEVAP Canister Purge Solenoid VVT-i Variable Valve Timing with intelligence
VVTL-i Variable Valve Timing and Lift with intelligence
VTV Vacuum Transmitting Valve
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