Starting / Switching Off The Engine With The Key; Ignition Switch - CITROËN DS 4 Handbook

Anti-theft protection
Electronic engine immobiliser
The keys contain an electronic chip which has
a special code. When the ignition is switched
on, this code must be recognised for engine
starting to be authorised.
This electronic engine immobiliser locks the
engine management system a few minutes
after the ignition is switched off and prevents
starting of the engine by anyone who does not
have the key.
In the event of a fault, you are
informed by illumination of this
warning lamp, an audible signal
and/or the display of a message,
depending on version.
In this case, your vehicle will not start; contact
a CITROËN dealer as soon as possible.
Keep safely, away from your vehicle,
the label attached to the keys given to
you on acquisition of the vehicle.

Starting / Switching off the engine with the key

Ignition switch

It has 3 positions:
position 1 (Stop): insert and removing the
-
key,
position 2 (Ignition on): steering column
-
unlocked, ignition on, Diesel preheating,
engine running,
- position 3 (Starting).
Ignition on position
It allows the use of the vehicle's electric
equipment or portable devices to be charged.
Once the state of charge of the battery drops
to the reserve level, the system switches to
energy economy mode: the power supply is
cut off automatically to preserve the remaining
battery charge.
Avoid attaching heavy objects to the
key or the remote control, which would
weigh down on its blade in the ignition
switch and could cause a malfunction.
It could adversely affect the
deployment of the front airbag.
Switching off the engine leads to a loss
of braking assistance.