ignition RENAULT CLIO 1999 X65 / 2.G Air Bag And Seat Belts Workshop Manual

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Air bags and seat belt pretensioners
Replacement compatibility
General
Special tooling
XRBAG test kit
30 track XRBAG adaptor
50 track XRBAG adaptor
Dummy air bag ignition module
Destruction apparatus
Operation of front air bags
and pretensioners
Operation of side air bags
Electronic unit
Instrument panel warning light
Side impact sensors
Operation on triggering lines
Seat belt pretensioners
Seat belts
Driver’s air bag
Rotary switch
Passenger air bag module
Side air bag module
Destruction procedure
Fault Finding
Introduction
Front air bag
Introduction
Interpretation of faults
Checking conformity
Aid
Fault charts
Side air bag
Introduction
Interpretation of faults
Checking conformity
Aid
Fault charts88-2
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14328-1S
This bornier is connected in place of the compu-
ter.
Using the
XRBAG, it allows all the trigger lines to
be checked, the computer supply voltage to be
measured and forces the air bag warning light on
the instrument panel to illuminate.
Terminals also allow continuity checks on the dia-
gnostic lines, the earth, the warning light lines
and on the supply to the computer (see "Fault
Finding" section).
NOTE : the DPP terminal is not currently used on
this system.
Identification of adaptor output wiring
1 : Not currently used
2 : Supply and warning light
A : Driver’s pretensioner lines
B : Passenger’s pretensioner lines
C : Driver’s air bag lines
D : Passenger’s air bag lines
E : Driver’s side air bag lines
F : Passenger’s side air bag lines
50 TRACK XRBAG ADAPTOR(B50)
for vehicles with side air bags
DUMMY IGNITION MODULE
A dummy ignition module integrated in a small
red box is supplied in the XRBAG.
It has the same electrical specifications as a real
ignition module and is used to replace the air bag
or the pretensioner during fault finding.
Refer to your After Sales Head Office for further
information.
15749S
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DESTRUCTION EQUIPMENT
In order to avoid any risk of an accident the pyro-
technic gas generators for the air bags and seat
belt pretensioners must be triggered before the
vehicle or the part is scrapped.
Tool Elé. 1287 must be used which is provided for
this purpose.
96832R
Refer to "Destruction procedure" section.
IMPORTANT: do not trigger pretensioners which
must be returned under warranty for a stalk pro-
blem. This makes analysis of the component im-
possible for the supplier.
Return the component in the packaging of the
new one.
OPERATION OF PRETENSIONERS AND FRONT AIR
BAGS
When the ignition is switched on, the control war-
ning light for these systems is illuminated for se-
veral seconds and then is extinguished.
The computer is on standby and monitors the de-
celeration of the vehicle using the signal measu-
red by two integral decelerometers.
In the event of a frontal impact of sufficient force,
one of them simultaneously triggers the pyrote-
chnic generators for the two seat belt pretensio-
ners.
Under the force of the gas generated by the sys-
tem, a piston moves in its cylinder pulling a cable
connected to a corresponding central buckle
which retracts the seat belt (see the
"Pretensioners" section).
If the frontal impact is greater, the second elec-
tronic decelerometer triggers the ignition of the
pyrotechnic gas generators which inflate the dri-
ver and passenger air bags (according to equip-
ment).
These systems will not trigger in the event of:
- a side impact,
- a rear impact.
When triggered, a pyrotechnic gas generator pro-
duces an explosion and a small amount of smoke.
NOTE : the computer and ignition modules supply
normally comes from the vehicle battery.
However, an energy reserve is included in the
computer in case the battery is disconnected at
the start of the impact.
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OPERATION OF SIDE AIR BAGS
When the ignition is switched on, the control war-
ning light for these air bag and pretensioner sys-
tems is illuminated for several seconds and then is
extinguished.
The air bag and pretensioner system computer is
then on standby as are the side air bags impact
sensors located in the two inner sills of the vehicle.
In the event of a side impact of sufficient force,
the side impact sensor on the impact side sends a
signal to the air bag and pretensioner system
computer , after having had confirmation of an
impact from the electronic safety sensor (incorpo-
rated in the unit).
The unit triggers the ignition of the pyrotechnic
gas generators in the seat which inflate the air
bag cushion (on the impact side).
The side air bags are not triggered during:
- a frontal impact,
- a rear impact,
- an impact on the opposite side.
When triggered, a pyrotechnic gas generator pro-
duces an explosion and a small amount of smoke.
NOTE :the computer and ignition modules supply
normally comes from the vehicle battery.
However, an energy reserve is included in the
computer in case the battery is disconnected at
the start of the impact.
REMINDER : for vehicles fitted with self contained
air bags, see Technical Note 3064A.
COMPUTER
Two types of computer are assembled on these ve-
hicles according to their equipment :
• A unit supplied by a 30 track yellow connector
for vehicles without side air bags. This must be
configured according to the vehicle’s equip-
ment (see configuration).
• A unit supplied by a 50 track orange connector
for vehicles with side air bags.
These units comprise :
- two electronic decelerometers for front air bags
and pretensioners,
- an electronic safety sensor for non-self contai-
ned side air bags (unit with 50 track orange
connector only),
- connections with side electronic sensors in the
inner sills (unit with 50 track orange connector
only),
- an ignition circuit for the different pyrotechnic
systems ,
- an energy reserve,
- a fault finding circuit with memorisation of the
faults detected,
- a control circuit for the warning light on the ins-
trument panel,
- a communication interface K - L via the fault fin-
ding socket.
IMPORTANT
Before removing the computer, it must be locked
using one of the fault finding tools (
XR25, NXR or
OPTIMA 5800).
When this operation is activated,all the ignition
lines are inhibited and the air bag warning light on
the instrument panel is illuminated (new computers
are delivered in this condition).
See following procedure.
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Special features after triggering
These types of unit (30 or 50 track) can accept up
to four triggerings maximum. Therefore it is not
necessary to replace them each time the air bags
or pretensioners are triggered .
In the event of being triggered, the warning light
on the instrument panel is illuminated, but the
computer does not lock the ignition lines which
have not been triggered. These remain in opera-
tion.
On the other hand, the computer locks the memo-
rised faults in order to prevent accidental erasing
of the context register for the impact which cau-
sed triggering.
These contexts can later be used to simplify the
repair of the vehicles involved in accidents and al-
so for examination needs.
IMPORTANT, during repair following an impact,
an unlocking command must be carried out follo-
wed by a locking command for the computer to
lock all of the ignition lines.
Erasing memorised faults is only possible follo-
wing a computer unlocking command.
If the fault finding tool does not recommend re-
placing the computer, only replace the triggered
components and check that there are no faults.
When everything is correct, unlock the computer
using a fault finding tool; the system is again ope-
rational.
If the fault finding tool recommends replacing the
computer, it will indicate either :
• that the computer has triggered four times ei-
ther just the pretensioners or the pretensio-
ners and air bags or the side air bag which is
not self contained (according to equipment),
• or an internal fault in the computer .
In these two circumstances, replace the computer.Special notes for replacing the computer
A new computer must be fitted to the vehicle be-
fore reconnecting its connector (tightening tor-
que : 0.8 daN.m).
The arrow on the computer must point towards
the front of the vehicle.
After connecting the connector, carry out a check
using the fault finding tool and proceed with
configuration if the vehicle does not have a pas-
senger air bag.
When everything is correct, unlock the computer
using a fault finding tool; the system is again ope-
rational.
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Procedure for locking the computer
Before removing the computer or before carrying
out any repair on the air bag or pretensioners sys-
tem, the computer must be locked either :
• by using the XR25 (fiche n° 48)
1 Type in code D49 ISO selector on S8
2 Type in command G80*
When this operation is activated, all the
ignition lines are inhibited, the air bag
warning light on the instrument panel
and bargraph 16 LH side on the XR25 are
illuminated (new computers are delivered
in this condition).
Fault finding remains possible when this
mode is activated.
NOTE : to unlock the computer, use the same me-
thod using command G81*. The air bag warning
light on the instrument panel and bargraph
16 LH
side on the XR25 will be extinguished.
• by using the NXR and the OPTIMA 5800
1 Choose the "fault finding " menu
2 Select and validate the vehicle type (Clio
II)
3 Select and validate the "Air bag and pre-
tensioners" system which is to have fault
finding carried out
4 Choose the "Command" menu
5 Select and validate the "Actuator
Command" operation then validate the
"computer locking" command.
6 Choose the "Status" menu and check that
the computer is correctly locked. The bar-
graph for the "locked computer" line and
the air bag warning light on the instru-
ment panel must be illuminated (new
computers are delivered in this condition).
Fault finding remains possible when this
mode is activated.
NOTE : to unlock the computer, use the same me-
thod validating the "Computer unlocking" line.
The bargraph for the "Computer locked" line and
the air bag warning light on the instrument panel
must be extinguished.Removal
It is located on the tunnel in the central console.
To access it :
- remove the central console,
- move the warm air ducts to one side and dis-
connect the computer,
- cut the carpet slightly to access the mounting
bolts,
- remove the computer with the diagnostic
socket support.
14062R3
IMPORTANT
• when carrying out a repair underneath the ve-
hicle (exhaust, bodywork, etc.), do not use a
hammer or transfer an impact to the floor wi-
thout having locked the computer using the
fault finding tool .

• when installing an electrical accessory in after
sales (speaker, alarm, or any equipment which
can generate a magnetic field), it must not be
fitted close to the air bag / pretensioners
computer.
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Connection
NOTE : the computer connector has a special fea-
ture in that it short circuits the various trigger
lines when it is disconnected. In effect, the shunts,
located opposite each pretensioner or air bag line,
prevent incorrect triggering of the system (by an-
tenna effect for example).
Yellow 30 track connector
(full connection)
Track Description
1 + driver’s pretensioner
2 - driver’s pretensioner
3 + passenger pretensioner
4 - passenger pretensioner
5 + after ignition feed
6 Earth
7Air bag warning light on the instrument
panel
8 Not used
9 Diagnostic line"K"
10 + driver’s air bag
11 - driver’s air bag
12 Not used
13 + passenger’s air bag
14 - passenger’s air bag
15 Not used
16 Shunt
17 Shunt
18 Shunt
19 Shunt
20 Earth
21 Shunt
22 Shunt
23 Diagnostic line "L"
24 Not used
25 Shunt
26 Shunt
27 Not used
28 Shunt
29 Shunt
30 Not used50 track orange connector
Track Description
1 + driver’s pretensioner
2 - driver’s pretensioner
3 + passenger pretensioner
4 - passenger pretensioner
5 + after ignition feed
6 Earth
7Air bag warning light on the
instrument panel
8 Not used
9 Diagnostic line"K"
10 + driver’s air bag
11 - driver’s air bag
12 Diagnostic line "L"
13 + passenger’s air bag
14 - passenger’s air bag
15 Not used
16 + driver’s side air bag
17 - driver’s side air bag
18 - passenger’s side air bag
19 + passenger’s side air bag
20 Driver’s side impact sensor signal
21 - driver’s side impact sensor
22 - passenger’s side impact sensor
23 Passenger side impact sensor signal
24 Not used
25 Not used
26 to 29 Shunt
30 Not used
31 Shunt
32 Shunt
33 Not used
34 Not used
35 Shunt
36 Shunt
37 Not used
38 Shunt
39 Shunt
40 Not used
41 to 44 Shunt
45 to 50 Not used
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WARNING LIGHT ON THE INSTRUMENT PANEL
This warning light controls the pretensioners and
the driver and passenger air bags.
It must illuminate for several seconds when the
ignition is switched on, then extinguish (and re-
main extinguished).
Not illuminating when the ignition is switched on
or illuminating when the vehicle is moving indi-
cates a fault in the system (see "Fault Finding" sec-
tion).
SIDE IMPACT SENSORS
(according to equipment)
IMPORTANT : before removing a side impact sen-
sor, lock the computer using a fault finding tool.
When this operation is activated, all the trigge-
ring lines are inhibited, the air bag warning light
on the instrument panel is illuminated.
REMINDER : for vehicles fitted with self contained
air bags, see Technical Note 3064A.
Removal
They are located on each side under the the inner
sill trim.
To access it :
- remove the two sensor mounting bolts, pas-
sing the wrench under the seat runner,
- disconnect the sensor.
NOTE : removing the seat is not necessary.
15812R
15811S
Removed sensor
IMPORTANT: In the event of the side air bag
being triggered, the computer illuminates the air
bag warning light on the instrument panel. The
side impact sensor must be replaced (certain
components lose their nominal specifications af-
ter the triggering energy has passed through
them).
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After deactivating the air bag function using the
fault finding tool and removing the passenger air
bag module :
• cut the passenger air bag wiring 60 mm from
the instrument panel wiring tape,
• unsheath the passenger air bag supply wiring
by 30 mm,
• strip the wiring provided in the kit and the
passenger air bag wiring by approximately10
mm,
• thread 2 cm of heat shrink sleeving (provided
in the kit) on each of the vehicle’s wiring lines,
• solder the vehicle’s wiring to the wiring in the
kit (B),
• position the heat shrink sleeving over the sol-
dered joins and heat it,
15668R
• refit and secure the passenger air bag module,
• connect the new connector to the passenger
air bag module,
• carry out a check using the fault finding tool.
Unlock the computer if everything is correct,
otherwise see the "Fault Finding " section.
SEAT BELT PRETENSIONERS
Description
They are mounted to the side of the front seats.
96438S
A pretensioner comprises :
- a special belt buckle (A),
- a pyrotechnic gas generator with its ignition
module (B).
DI8801R
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When triggered, the system can retract the buckle
by 70 mm (maximum).
DI8802
The pretensioner’s components can not be
separated.
NOTE : this system is operational when the
ignition has been switched on.
Removal
IMPORTANT:The pyrotechnic systems (pretensio-
ners or air bags) must not be handled when near a
heat source or a flame because there is a risk that
the system will be triggered.
IMPORTANT
Before removing a pretensioner, lock the
computer using the fault finding tool.
When this function is activated, all trigger lines
are inhibited, the air bag warning light on the ins-
trument panel is illuminated.
Remove:
- the pretensioner connector located under the
front seat,
- the pretensioner assembly, after having remo-
ved the protective trim.
IMPORTANT : before scrapping an untriggered
pretensioner module, it
MUST be destroyed in ac-
cordance with the method described in the
"Destruction Procedure" section (except parts
which can be returned under warranty).
Refitting
Observe the wiring routing and the mounting
points under the seat.
NOTE : press the connector in firmly on the pre-
tensioner side (C) (strong clipping system).
IMPORTANT : after replacing the faulty parts and
reconnecting the connectors, carry out a check
using the fault finding tool.
Unlock the computer if everything is correct,
otherwise see the"Fault Finding" section.
REMINDER: the computer in these vehicles can wi-
thstand several triggerings. Therefore, it does not
have to be replaced after every triggering of the
air bag(s) or pretensioners (see "Computer" sec-
tion).
88-17