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

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Air bags and seat belt pretensioners
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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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Air bags and seat belt pretensioners
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96835S
Unroll all the wire supplied with the tool so that
you are far enough away from the assembly
(approximately 10 metres) when the unit is
triggered and connect it to the air bag cushion
wiring.
Connect the two feed wires on the tool to a
battery.
After ensuring that no-one is near the unit, carry
out the destruction of the air bag by pressing the
two push buttons on the tool at the same time.
NOTE : if the unit cannot be triggered (faulty
ignition module), return the old part in the
packaging from the new replacement part to ITG
(Service 0429).
• Passenger air bag module
Destruction of the component removed from the
vehicle
Carry out the procedure in the same way as for
the driver’s air bag in the pile of old tyres (see
above). Cover the assembly with a stack of four old tyres.
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AFTER REPAIR
Computer supply voltage
1.dEF : Too many micro-cuts
2.dEF : Feed voltage too low
3.dEF : Feed voltage too highDF002
present
NOTES
Erase the computer memory
For a micro-cut fault, check the computer supply lines :
- condition of the connections on the computer.
- condition of the computer earths (tracks 6 and 20 of the 30 track connector to front right hand pillar
earth).
- condition/ position of the fuse,.
- condition and tightness of the battery terminals.
NoneNOTES 1.dEF
Carry out the operations necessary to obtain the correct supply voltage for the computer:
9 volts ± 0.1 < correct voltage < 18 volts ± 0.1
- Check the battery charge.
- Check the charging circuit.
- Check the tightness and condition of the battery terminals.
- Check the computer earth.
NoneNOTES 2.dEF - 3.dEF
Use the B40 XRBAG adaptor for operations on the computer connector.
FAULT FINDING- INTERPRETATION OF FAULTS
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FRONT
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Chart 1NO DIALOGUE WITH THE AIR BAG COMPUTER
NoneNOTES
Ensure that the fault finding tool is not the cause of the fault by trying to communicate with a computer
on another vehicle . If the tool is not at fault and dialogue can be established with another computer on
the same vehicle, it may be that a faulty computer has disrupted the fault finding linesK and L.
Proceed using successive disconnections in order to locate this computer.
Check the battery voltage and carry out the necessary operations to obtain the correct voltage (10.5 volts
< U battery > 16 volts).
When communication is established, deal with any faults which may be declared.
Check the presence and condition of the air bag computer supply fuse.
Check the computer connector connection and the condition of its connections.
Check the the computer is correctly supplied :
- Disconnect the air bag computer and fit the XRBAG 30 track B40 adaptor .
- Check and ensure the presence of the +After Ignition Feed between the terminals marked earth and
+After Ignition Feed .
Check that the diagnostic socket is supplied correctly :
-+Before Ignition Feed ontrack 16.
-Earth on track 5.
Check the continuity and insulation of the diagnostic socket / air bag computer connection lines:
- Between the terminal marked L and track 15 of the diagnostic socket.
- Between the terminal marked K and track 7 of the diagnostic socket .
If dialogue is still not established after carrying out these different checks, replace the air bag computer
(refer to "Aid" section for this operation).
AFTER REPAIR
FAULT FINDING- FAULT CHARTS
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FRONT
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AFTER REPAIR
Computer supply voltage
1.dEF : Too many micro-cuts
2.dEF : Feed voltage too low
3.dEF : Feed voltage too highDF002
present
NOTES
Erase the computer memory.
For a micro-cut fault, check the computer supply lines :
- condition of the connections on the computer,
- the condition of the computer earths (tracks 6 and 30 on the 50 track connector to the front right pillar
earth).
- condition/ position of the fuse,
- condition and tightness of the battery terminals.
NoneNOTES 1.dEF
Carry out the operations necessary to obtain the correct supply voltage for the computer :
9 volts ± 0.1 < correct voltage < 18 volts ± 0.1.
- Check the battery charge.
- Check the charging circuit.
- Check the tightness and condition of the battery terminals.
- Check the computer earth.
NoneNOTES 2.dEF - 3.dEF
Use the B50 XRBAG adaptor for operations on the computer connector.
FAULT FINDING - INTERPRETATION OF FAULTS
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SIDE
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Chart 1NO DIALOGUE WITH THE AIR BAG COMPUTER
NoneNOTES
Ensure that the fault finding tool is not the cause of the fault by trying to communicate with a computer
on another vehicle . If the tool is not at fault and dialogue can be established with another computer on
the same vehicle, it may be that a faulty computer has disrupted the fault finding linesK and L.
Proceed using successive disconnections in order to locate this computer.
Check the battery voltage and carry out the necessary operations to obtain the correct voltage (10.5 volts
< U battery > 16 volts).
When communication is established, deal with any faults which may be declared.
Check the presence and condition of the air bag computer supply fuse
Check the computer connector connection and the condition of the connector.
Check the computer is correctly supplied :
- Disconnect the air bag computer and fit the
XRBAG 50 track B50 adaptor .
- Check and ensure the presence of the +After Ignition Feed between the terminals marked earth and
+ After Ignition Feed
Check that the diagnostic socket is supplied correctly :
-+ Before Ignition Feed on track 16.
-Earth on track 5.
Check the continuity and resistance of the diagnostic socket / air bag computer connection lines :
- Between the terminal markedL and track 15 of the diagnostic socket.
- Between the terminal marked K and track 7 of the diagnostic socket.
If dialogue is still not established after carrying out these different checks, replace the air bag computer
(refer to "Aid" section for this operation).
AFTER REPAIR
FAULT FINDING- FAULT CHARTS
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Air bags and seat belt pretensionersSIDE
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