1999 RENAULT CLIO sensor

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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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The Clio II from now on will be fitted with a new 2nd generation passive safety assembly comprising :
- a driver’s front air bag with an SRP inflatable bag (unaltered),
- a new passenger’s front air bag (according to equipment) with a new S.R.P inflatable bag which is in-
compatible with old computers part number 77 00 426 752 (see following page),
- front pretensioners (unaltered),
- front seat belts specific to the
SRP programmed restraint system (unaltered),
- a new computer specific to this assembly (30 or 50 tracks according to equipment),
- a new driver’s and passenger’s side air bag assembly (according to equipment) with side impact sensor
fitted in the central pillar of the same side.
IMPORTANT
With this assembly ( SRP front air bags), the seat belts are connected to the air bag function.
The programmed restraint system for the seat belts is not calibrated in the same way according to whe-
ther they are mounted with an SRP air bag or not (the part number for each part must be checked before
being replaced).
On these vehicles, it is forbidden to fit an SRP seat belt on a seat not provided with an air bag .
For more information about the SRP seat belts, see the corresponding bodywork technical note.
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NOTE :
Vehicles fitted with front air bags are identified
by a sticker placed in the lower corners of the
windscreen on each side with the inscription "SRP
air bag" in the centre of the steering wheel and
on the dashboard (according to equipment).
Vehicles fitted with side air bags are identified by
a sticker placed in the lower corners of the winds-
creen on each side with the inscription"air bag"
on the side of the front seat backs (according to
equipment).
After each replacement of the windscreen, re-
member to apply the stickers mentioning that the
vehicle is fitted with air bags.
All of these stickers are available in a kit part num-
ber: 77 01 205 442.
15132R
In the event of a side impact of sufficient force,
the corresponding side air bag (on the impact
side) inflates on the door side, to protect the head
and thorax of the seat occupant.
IMPORTANT:
• Do not put covers on the front seats.
• Do not put anything in the way which will ob-
struct inflation of the air bags.
• In the event of work being carried out on the
vehicle sill (on the side impact sensor, on the
bodywork, on the seat belt inertia reel,...), the
air bag unit must be locked using the fault
finding tool.
• Any operation involving removal and refitting
of the seat trim on a seat back fitted with a
side air bag, must not be carried out for the
time being.
In case of a fault on the air bag cushion or follo-
wing its inflation, the whole seat must be repla-
ced following the specific Parts Department or-
der procedure .
Reminder : for vehicles fitted with self contained
side air bags, refer to Technical Note 3064A.
IMPORTANT : the pyrotechnic systems (pretensio-
ners, front and side air bags) must be checked
using a fault finding tool :
- following an accident in which the air bags
did not inflate,
- following a theft or attempted theft of the ve-
hicle,
- before selling a second hand vehicle.
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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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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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Refitting
To refit it, position the sensor using its lug and
mount it to the vehicle before reconnecting the
connector(tightening torque : 0.8 daN.m).
After connecting its connector, carry out a check
using the fault finding tool.
Unlock the computer if everything is correct,
otherwise see the"Fault Finding" section.
Connection
Track Description
1 Sensor supply
2 Earth
3 Not used
OPERATION ON THE TRIGGERING LINES
In the event of a fault noted on one of these lines,
the component must be replaced and not repai-
red.
This safety device can not tolerate any conventio-
nal repair operation on the wiring or connectors.
The air bag and pretensioner triggering lines are
integrated in the passenger compartment wiring
harness. In order to make repairs easier, the re-
placement method consists of cutting the two ex-
tremities of the faulty wiring and making the
new wiring follow the same route along the pas-
senger compartment wiring harness.
IMPORTANT: when refitting the new wiring, en-
sure that it is not subject to damage and that the
original cleanliness has been respected.
Special case : the connector with lugs
A series of vehicles are fitted with a red connector
with lugs(A) passenger air bag module side.
16008R
To disconnect it, carefully use a small screwdriver
as a lever , so as not to damage the lugs .
In the event of the lugs breaking, replace the
connector using the kit part number : 77 01 206
210 using the following method.
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Removal - Refitting
Any operation involving removal and refitting of
the seat trim of a seat back fitted with a side air
bag, must not be carried out for the time being.
In case of a fault on the air bag cushion or follo-
wing its inflation, the whole seat must be repla-
ced following the specific Parts Department or-
der procedure .
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).
On the other hand, in the event of a triggering
being caused, the side impact sensor must be re-
placed (certain components lose their nominal
specifications after the triggering energy has pas-
sed through them).
IMPORTANT :
• Before removing a seat, lock the computer
using the fault finding tool.
When this operation is activated, all the trig-
gering lines are inhibited and the air bag war-
ning light on the instrument panel is illumina-
ted.
• When refitting, after replacing the seat 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.
IMPORTANT : before scrapping an untriggered air
bag module, it
MUST be destroyed in accordance
with the method described in the "Destruction
Procedure" section
96832R
DESTRUCTION PROCEDURE
To avoid the risk of an accident, the pyrotechnic
gas generators must be triggered before scrap-
ping a vehicle or a single part.
Tool Elé. 1287 must be used.
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