Page 3 of 83
81-1
81-2
Contents
BATTERIE PROJECTEURS
Battery
Special notes
Headlights
Lens units and indicators
Remote adjustment
80-1
80-3
80-4
ECLAIRAGE ARRIERE
Courtesy light
Fuses
PagePage
Electrical
Equipment
WIPERS
Front windscreen wiper
Rear screen wiper
Electric washer pump
85-1
85-3
85-4
85
Coded key immobiliser system82-1
IMMOBILISER82
Relay plate87-1
ELECTRICAL ASSISTANCE EQUIPMENT
REAR AND INTERIOR LIGHTS
BATTERY - HEADLIGHTS80
81
87
Dashboard
Instrument panel
Fuel level sensor
Oil level sensor
Coolant temperature sensor83-1
83-6
83-10
83-12
83-13
INSTRUMENT PANEL83
Windscreen wiper stalk
Lights stalk
Stalk mounting
Rotary switch under steering
wheel
Ignition switch84-1
84-2
84-3
84-4
84-6
CONTROLS - SIGNALS84
WIRING
Heated rear screen
Remote control for door locking
Airbags and seat belt pretensioners
88-1
88-3
88-8
88
Page 9 of 83
REAR AND INTERIOR LIGHTS
Fuses
81
FUSE BOX (passenger compartment)
This unit is located in the passenger compartment on the driver’s side.
Allocation of fuses (depending on equipment level).
Symbol Rating Description
10
15
30
30
30
20
15
15
15
15
10
25
25
20
15
15
25Instrument panel / Electric rear view mirrors/ Radio / Car phone
Courtesy light / Immobiliser
Consumer cut-out
Towing connection
Heated rear screen
Central door locking / Immobiliser
Front fog lights
Rear screen wash - wipe/
Reversing lights / Heated rear screen / Immobiliser
/ Lights on reminder buzzer
Front wash - wipe
Stop lights/ Instrument panel/ Airbag / Pretensioners
Anti-lock braking system (ABS)
Left hand electric window
Right hand electric window
Heated seats
Air conditioning
Radio / Cigar lighter / Car phone
Heating
81-2
Page 12 of 83

IMMOBILISER
Coded key immobiliser system
GENERAL
The immobiliser is controlled by a key recognition
system (known as coded key immobiliser system).
An independently operating coded chip without a
battery is integrated into each head of the vehicle
keys.
When the ignition is switched on, an antenna ring
around the ignition switch interrogates and cap-
tures the code from the head of the key and trans-
mits it to the decoder unit.
If the decoder unit recognises the code, the vehi-
cle will be permitted to be started.
The immobiliser is activated a few seconds after
the key is withdrawn from the ignition and this is
shown by the flashing of the red immobiliser war-
ning light on the instrument panel.
If there is a fault in the key recognition system, a
security code may be entered using the XR25 only.
This code may be communicated to the repair
agent (on his request) by the local assistance net-
work (depending on country, for example: Delta
Assistance on 0800.05.15.15 for France, NVSR for
the UK by fax only).
IMPORTANT: The repair agent must inform the
customer that the immobiliser system will reset it-
self automatically 10 minutes after switching the
ignition off.
82
NOTES
This system may be fitted to petrol or diesel vehi-
cles.
Petrol vehicles: the immobiliser function is carried
out by the injection computer.
Diesel vehicles: the immobiliser function is carried
out by the coded solenoid valve (on the injection
pump).
If the vehicle is fitted with a remote control for
door locking, a single decoder unit carries out
both functions (immobiliser and remote control).
The remote control has no effect on the immobili-
ser system (see section 88).
On these vehicles, the identification number of
the key heads contains eight alphanumeric cha-
racters, beginning with the letter E or A.
82-1
Page 14 of 83
IMMOBILISER
Coded key immobiliser system
82
• An antenna ring (C) around the ignition
switch, with an electronic unit which transmits
the key code to the decoder unit (D).
NOTE : This antenna ring is not coded.
Removal - Refitting
Remove the half cowlings from under the steering
wheel, release the antenna ring from the ignition
switch and disconnect its connector.
13067R
• A decoder unit (D) in the dashboard on the left
hand side.
This has the following functions:
- decoding of the key signal from the antenna
ring,
- management of the engine immobiliser
system by the sending of a code to the injection
computer (petrol) or coded solenoid valve
(diesel) to authorise the vehicle to be started
- operation of the red immobiliser warning light,
- locking and unlocking of the opening elements
(depending on version),
- timed illumination of the courtesy light (vehicle
fitted with a door locking remote control).
12967R1
82-3
Page 15 of 83

IMMOBILISER
Coded key immobiliser system
82
Removal - Refitting
The dashboard must be partially removed to re-
move the decoder unit.
Remove:
- the steering wheel with the wheels straight,
- the half cowlings under the steering wheel,
- the knee protector under the steering column,
- the lights and wiper controls,
- the instrument panel surround,
- the instrument panel,
- the ashtray, its mounting and the two dash-
board mounting bolts on the heating unit,
- the trim at the bottom of the dashboard on the
driver’s side,
- the two speaker grilles on the dashboard,
- the dashboard mountings.
13065R1
Move the dashboard as far back as possible, dis-
connect the decoder unit and remove the two
mounting bolts (B) using a small ratchet fitted
with a Torx 20 socket.
•A red immobiliser warning light on the instru-
ment panel used to :
- indicate activation of the engine immobiliser
system,
- signal a fault in the system for vehicles with a
coded solenoid valve (diesel) or non-
recognition of the key,
- signal entry into the door locking remote
control resynchronisation mode (depending
on equipment).
• An injection warning light (petrol vehicle)
which indicates a fault in the:
- injection,
- engine immobiliser system when the engine
is running (flashes during deceleration and
at idle speed).
82-4
Page 22 of 83

IMPORTANT: if an uncoded injection computer or
solenoid valve is being tested from stock (test
part), the decoder unit
MUST NOT be supplied du-
ring the operation.
If the decoder unit is supplied, switching the igni-
tion on causes a coded signal to be sent from the
decoder unit to the injection computer or coded
solenoid valve (and the code is then program-
med).
To avoid memorising a code which could make
the injection computer or coded solenoid valve
electronic unit unusable after the test, the fuse
(+ before ignition feed) for the decoder unit
must be removed (fuse showing the door locking
symbol). This prevents the coded signal being sent
when the ignition is switched on (the computer or
the coded solenoid valve electronic unit remains
uncoded).
For petrol vehicles, the computer used for the test
MUST have the same Part Number as the original
computer on the vehicle (test computer may be
damaged).
Checking (on petrol vehicle only)
If the test computer is to be returned to stock, it is
possible (before it is removed) to check using the
XR25 that the computer has not been coded du-
ring the test (example : incorrect operation).
Connect the XR25 to the diagnostic socket.
Position the ISO selector and enter the injection
code: bargraph
2 RH (immobiliser) should be illu-
minated.
After entering
the message
should be displayed on the XR25.
This shows that the injection computer is not co-
ded and may be returned to stock.
If bargraph
2 RH (immobiliser) is extinguished and
after entering
the message
is displayed on the XR25, this shows that the
computer has been programmed with the immo-
biliser code (incorrect operation). In this case the
computer must be decoded before being returned
to stock.
The procedure for decoding consists of replacing
the decoder unit on the vehicle with another de-
coder unit with a different code (with its key
head) and entering the security code for the vehi-
cle (security code number should be requested
from the local assistance network, example
DELTA
Assistance for France, NVSR for the UK by fax on-
ly) using the number in the head of the key for the
vehicle.
Ignition off, fit in place of the original decoder
unit on the vehicle, a decoder unit coded with a
different number (the procedure will not work
with an uncoded decoder unit or one which has
the same code as the injection computer).
IMMOBILISER
Coded key immobiliser system
SPECIAL NOTES FOR TESTING AN INJECTION
COMPUTER OR A CODED SOLENOID VALVE (test
part)
82
*22
*22
82-11
Page 25 of 83
IMMOBILISER
Coded key immobiliser system
82
13063R
Track Allocation
A1 Courtesy light timer*
A2 Antenna ring coded connection
A3 Diagnostic socket information (line K)
A4 Diagnostic socket information (line L)
A5 Red immobiliser warning light
A6 Coded information to injection computer
or coded solenoid valve
A7 + after ignition
A8 Earth
A9 + before ignition
B1 Infrared input*
B2 Door lock command*
B3 Not used
B4 Door switch*
B5 Door open command*
B6 Not used
B7 Not used
B8 Door open*
B9 Door lock*
DECODER UNIT CONNECTIONS (fullest version)
* Vehicle with remote control
82-14
Page 27 of 83

IMMOBILISER
Coded key immobiliser system
82
KEY
104 Ignition switch
120 Injection computer
123 Door locking button
138 Rear right door locking motor
140 Driver’s door locking motor
141 Passenger’s door locking motor
142 Luggage compartment door locking motor
154 Luggage compartment door switch
178 Rear right door switch
180 Driver’s door switch
181 Passenger’s door switch
213 Courtesy light
225 Diagnostic socket
247 Injection warning light and red immobiliser
warning light on instrument panel
249 Remote control receiver
260 Passenger compartment fuse box
503 Decoder unit
711 Coded solenoid valveFAULT FINDING
If this immobiliser system is faulty, fault finding
may be carried out using the XR25.
CONNECTION
Use cassette no° 17 and the corresponding fault
finding fiche no° 56.
92656S2
Connect the XR25 to the diagnostic socket.
Position the ISO selector on S8.
Enter the code for the immobiliser system D56.
NOTE : For information on the interpretation of
the bargraphs, the fault charts, checking confor-
mity and additional tests, refer to the fault fin-
ding section.
82-16