Description Of The System; Operating Principle; Memorisation Of The System - PEUGEOT ACI -100 Workshop Manual

The transponder electronic immobiliser is an anti-theft system which prevents starting the vehicle if
an electronic code is not supplied to the immobiliser unit.
This electronic code is given by a transponder located in the body of the ignition key and does not
require any specific operation by the user.
The system consists of:
- A transponder (integrated into the ignition key)
- An antenna (located around the key contact switch)
- An ACI 100 ignition unit
- An LED (located in the instrument panel), as a deterrent function and for diagnosis.
The ACI 100 unit generates an electromagnetic field transmitted to the transponder via an antenna
situated around key contact switch. It receives the transponder code from the key and after recognising this
code authorises the ignition of the engine.
When the system is on stand by (ignition off) a flashing warning light (LED) on the instrument panel
serves as a deterrent function. However, to minimise battery discharging, this warning light goes out after
48 hours whilst the electronic immobiliser system remains active.
Disconnection of the battery, even over a long period of time, does not deactivate the system.
LIGHTING OF THE LED during NORMAL use
one FLASH per second
The two ignition keys delivered with the vehicles are memorised at the factory onto the ACI 100 unit
( a red key, the master key, is used for programming and a black key).
The procedure for memorising the keys enables the immobiliser unit to learn and to memorise the
transponder code of the different keys.
The number of keys that can be memorised is:
- Minimum
- Maximum
The master key (red key) is the first key used in the memorisation process. It becomes a specific key
as it enables the memorised black keys to be programmed or erased. It is impossible to deprogramme
this master key.
After memorisation and as a security measure, the master key must be kept by the owner in a
safe place, and must not remain in the vehicle.

DESCRIPTION OF THE SYSTEM

OPERATING PRINCIPLE

Black ignition

MEMORISATION OF THE SYSTEM

2 (including Master key)
3 (including Master key)
key light for 0.5 seconds then extinguished
3