Abbreviations and Symbols

INTRODUCTION

01-4

Abbreviations and Symbols

A

Amperes

AAP

Ambient Air Pressure

AAT

Ambient Air Temperature

ABDC

After Bottom Dead Centre

ABS 

Anti-Lock Brake System 

ABS  /  TC

Anti-lock Brake System / Traction 
Control

ac

Alternating current

A/C

Air Conditioning 

ACE

Active Cornering Enhancement

ACEA

Association of Constructors of 
European Automobiles

AFR

Air Fuel Ratio 

AP

Ambient Pressure

APP

Accelerator Pedal Position

ASC

Anti-shunt Control

ATC

Air Temperature Control

ATDC

After Top Dead Centre

AUX

Auxiliary

AVC

Automatic Volume Control

BBDC

Before Bottom Dead Centre

BBUS

Battery Backed Up Sounder

BCU

Body Control Unit

BDC

Bottom Dead Centre

bhp

Brake Horse Power

BP

Boost Pressure

BPP

Brake Pedal Position

BS

British Standard

BTDC

Before Top Dead Centre

BWD

Backward

C

Celsius

CAN

Controller Area Network

CD

Compact Disc

CDC

Centre Differential Control

CDL

Central Door Locking

CD - ROM

Compact Disc - Read Only 
Memory

CFC

Chlorofluorocarbon

CHMSL

Centre High Mounted Stop Lamp

CKP

Crankshaft Position

CLV

Calculated Load Value

cm

Centimetre

cm

2

Square centimetre

cm

3

Cubic centimetre

CMP

Camshaft Position 

CPP

Clutch Pedal Position

CO Carbon 

Monoxide

CO

2

Carbon Dioxide

COB

Clear Over Base

CR

Common Rail

CVS

Canister Vent Solenoid

dB

Decibels

DDM

Driver's Door Module

deg. 

Degree, angle or temperature

DI

Direct Injection

dia.

Diameter

DIN

Deutsche Industrie Normen 
(German Industrial Standards)

dc

Direct current

DCV

Directional Control Valve

DOHC

Double Overhead Camshaft

DSP

Digital Signal Processing

DTI

Dial Test Indicator

DMF

Dual Mass Flywheel

DVD

Digital Versatile Disc

EACV

Electronic Air Control Valve 

EAT

Electronic Automatic 
Transmission

EBD

Electronic Brake pressure 
Distribution

ECD

European Community Directive

ECM

Engine Control Module 

ECT

Engine Coolant Temperature

ECU

Electronic Control Unit

EDC

Electronic Diesel Control

EEPROM

Electronic Erasable 
Programmable Read Only 
Memory

EGR

Exhaust Gas Recirculation

EKA

Emergency Key Access

ELR

Emergency Locking Retractor

EN

European Norm

EOBD

European On Board Diagnostics

EON

Enhanced Other Network

ERL

Electrical Reference Library

ETC

Electronic Traction Control

EUI

Electronic Unit Injector

EVAP

Evaporative Emission

EVR

Electronic Vacuum Regulator

F

Fahrenheit

ft.

Feet

FBH

Fuel Burning Heater

FET

Field Effect Transistor

FIP 

Fuel Injection Pump

FTC Fast 

Throttle 

Control

FWD

Forward

>

Greater than

g

Gramme or Gravity

gal.

Gallons

GMT

Greenwich Mean Time

GPS

Global Positioning System

h

Hour

hc

High compression

HC

Hydro Carbons

HDC2

Hill Descent Control

HDOP

Height Dilation Of Precision

HDPE

High Density Polyethylene

HFS

Heated Front Screen

Hg

Mercury

HO

2

S

Heated Oxygen Sensor