Actron 9640 Manuel D’Utilisation

Air Conditioner
A/D:

Analog to Digital
A/F:

Air/Fuel ratio. The proportion of air and fuel delivered to the cylinder for 

combustion. For example, an A/F ratio of 14:1 denotes 14 times as much air as 

fuel in the mixture. Ideally the A/F ratio is 14.7:1.
ABS:

Anti-lock Brake System
AC Clutch Relay:

The PCM uses this relay to energize the A/C clutch, turning the A/C compressor 

on or off.
AC Pressure Sensor:

Measures air conditioning refrigerant pressure and sends a voltage signal to the 

PCM. 
AC Pressure Switch:

A mechanical switch connected to the A/C refrigerant line. The switch is 

activated (sending a signal to the PCM) when the A/C refrigerant pressure 

becomes too low or high.
Actuator:

Actuators such as relays, solenoids, and motors allow the PCM to control the 

operation of vehicle systems.
Air Injection Reaction (AIR) System:

An emission control system operated by the PCM. During cold starts, an air 

pump injects outside air into the exhaust manifold to help burn hot exhaust 

gases. This reduces pollution and speeds warm-up of oxygen sensors and 

converter. 
APP:

Acceleration Pedal Position (Sensor)
ASR:

Acceleration Slip Regulation
Bank x:

In-line engines have only one bank of cylinders. Most commonly used to identify 

Barometric Pressure Sensor. See MAP Sensor.
BBV:

Brake Boost Vacuum (Sensor)