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

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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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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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This fault finding section comprises two parts :
- For systems only with front air bags marked "Front".
- For systems with front and side air bags marked "Side".
CONDITIONS FOR APPLYING THE CHECKS DEFINED IN THIS FAULT FINDING
In this fault finding, each fault is interpreted for a type of special memory (fault present, fault memorised,
fault present or memorised).
The checks defined for the processing of each fault are therefore only applied to a vehicle if the fault is
interpreted for the type of fault declared by the fault finding tool.
If a fault is only interpreted in this fault finding if it is declared "present", applying the fault finding when
the fault is only "memorised" does not enable the origin of memorising this fault to be located. In this
case, only a check of the wiring and the connections for the part at fault needs to be carried out (it is
possible to test the wiring concerned in fault finding mode in order to try to see the change from
memorised fault to fault present).
If a fault is interpreted when it is declared"memorised", the conditions for confirming the actual presence
of the fault (and the need to apply fault finding) appear in the "Notes" section or at the beginning of the
fault interpretation.
Note : the ignition must be switched off before operating the fault finding tool.
TOOLING REQUIRED FOR OPERATIONS ON THE AIR BAG AND SEAT BELT PRETENSIONER SYSTEMS :
- fault finding tool (except XR25).
- XRBAG update N° 4 for front air bags (with the 30 track B40 adaptor with yellow computer base).
- XRBAG update N° 5 for side air bags ( with the new 50 track B50 adapter with orange computer base).
REMINDERS :
When carrying out an operation on the air bag / seat belt pretensioner systems, the computer must be
locked using the fault finding tool to prevent any risk of incorrect triggering (all trigger lines will be
inhibited).This "locked" mode is indicated by illumination of the warning light on the instrument panel.
If the operation follows an impact during which the pretensioners and/or air bags
were triggered, locking will only be possible following a computer unlocking command.
Following an impact during which the pretensioners and/or air bags were triggered, erasing the
memorised faults will only be possible following a computer unlocking command.
Never take measurements on the air bag and pretensioner triggering lines with an apparatus other than
the XRBAG.
Before using a dummy ignition module, ensure that its resistance is between 1.8 and 2.5 ohms.
During an operation ensure that the computer supply voltage does not fall below 10 volts (#01).
FAULT FINDING - INTRODUCTION
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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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Reconnect the computer and the air bag cushion ignition module, then switch on
the ignition. Erase the computer memory, then switch off the ignition. Carry out a
check again using the fault finding tool and, in the absence of a fault, unlock the
computer. Destroy the air bag if there has been a replacement (tool ELE. 1287).
AFTER REPAIR
Driver’s front air bag
CC : Short circuit
CO : Open circuit
CC.1 : Short circuit to 12 volts
CC.0 : Short circuit to earthDF003
present
NOTESNever carry out measurements on the triggering lines with equipment other than
the XRBAG.
NoneNOTES CO - CC
Lock the computer using the command on the fault finding tool.
Switch off the ignition and remove the 2 steering wheel boss mounting bolts.
Check that it is connected correctly.
Disconnect the steering wheel boss and attach a dummy ignition module to the ignition module
connector. Switch on the ignition and carry out a check using the fault finding tool.
Replace the air bag cushion if the fault has been memorised (fault no longer declared present).
The XRBAG must be used to measure resistance at point C2 of the driver’s air bag circuit.
If the value obtained is not correct, replace the rotary switch under the steering wheel.
Reconnect the rotary switch under the steering wheel, disconnect the computer connector and fit the 30
track B40 adaptor.
The XRBAG must be used to measure resistance on adaptor cable A .
If the value obtained is not correct,
check the connections on the 30 track connector (tracks 10 and 11)
and replace the wiring if necessary.
If there is no evidence of a fault after these checks have been carried out, check on the air bag computer
base for the 5 shunt opening pins for the 30 track connector.
Check the condition of the computer connections
Check the condition of the 30 track connector (locking system, ...).
With the ignition switched off, disconnect then reconnect the rotary switch connector under the steering
wheel.
Repair the connections if the fault has just been memorised (fault no longer declared present).
FAULT FINDING- INTERPRETATION OF FAULTS
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Reconnect the computer and the air bag cushion ignition module, then switch on the
ignition. Erase the computer memory, then switch off the ignition. Carry out a check again
using the fault finding tool and, in the absence of a fault, unlock the computer. Destroy the
air bag if there has been a replacement (tool ELE. 1287).
AFTER REPAIR
DF003
present
CONT
NoneNOTES CC.1 - CC.0
Lock the computer using the command on the fault finding tool.
Switch off the ignition and remove the two steering wheel boss mounting bolts.
Check the condition of the trigger cable.
The XRBAG must be used for insulation measurement appropriate to the type of fault at point C2 of the
driver’s front air bag circuit.
If the value obtained is not correct, replace the rotary switch under the steering wheel.
Reconnect the rotary switch under the steering wheel, disconnect the computer connector and fit the 30
track B40 adaptor.
The XRBAG must be used for insulation measurement appropriate to the type of fault on adaptor cable
A .
If the value obtained is not correct, check the connections on the 30 track connector (tracks 10 and 11)
and replace the wiring if necessary
FAULT FINDING- INTERPRETATION OF FAULTS
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1AB8651.0
Reconnect the computer and the passenger air bag ignition module, then switch
on the ignition. Erase the computer memory then switch off the ignition.Carry out
a check using the fault finding tool and, in the absence of a fault, unlock the
computer.Destroy the passenger air bag module if there has been a replacement
(tool Elé. 1287).
Passenger’s front air bag circuit
CC : Short circuit
CO : Open circuit
CC.1 : Short circuit to 12 volts
CC.0 : Short circuit to earthDF004
present
NOTESNever carry out measures on the triggering lines with equipment other than the
XRBAG.
NoneNOTES CO - CC
Lock the computer using the command on the fault finding tool.
Switch off the ignition, disconnect the computer connector and fit the 30 track B40 adaptor.
The XRBAG must be used to measure resistance on adaptor cable B .
Is the value obtained correct?
If the value obtained is correct at adaptor cable B, check on the air bag computer base
for the 5 shunt opening pins for the 30 track connector.
Check the condition of the computer connections.
Check the condition of the 30 track connector (locking system, connections, ...)YES
If the value obtained is not correct at adaptor cable B , check the connections on the
30 track connector (tracks 13 and 14).NO
If the value remains incorrect, switch off the ignition and remove the dashboard visor
to access the passenger air bag module wiring. Disconnect the passenger air bag
ignition module, connect a dummy ignition module to the ignition module connector,
then use the XRBAG to measure the resistance on adaptor cable B again.
If the value obtained is correct, change the passenger air bag module.
If the value obtained is still incorrect, replace the air bag wiring.
FAULT FINDING- INTERPRETATION OF FAULTS
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NoneNOTES CC.1 - CC.0
Lock the computer using the command on the fault finding tool.
Switch off the ignition, disconnect the computer connector and fit the 30 track B40 adaptor.
The XRBAG must be used to measure insulation appropriate to the type of fault declared by the fault
finding tool on adaptor cable B .
Is the value obtained correct?
Check the condition of the connections on the 30 track connector (tracks 13 and 14).YES
Check the condition of the connections on the 30 track computer connector (tracks 13
and 14).NO
If the value remains incorrect, replace the air bag wiring.
DF004
present
CONT
AFTER REPAIR
Reconnect the computer and the passenger air bag ignition module, then switch
on the ignition. Erase the computer memory then switch off the ignition.Carry out
a check using the fault finding tool and, in the absence of a fault, unlock the
computer.Destroy the passenger air bag module if there has been a replacement
(tool Elé. 1287).
FAULT FINDING- INTERPRETATION OF FAULTS
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AFTER REPAIR
Air bag fault warning light circuit
CC.1 : Short circuit to 12 volts
CO.0 : Open circuit or short circuit to earth
DF010
present
NOTESUse the XRBAG 30 track B40 adaptor for operations on the computer connector.
NoneNOTES CC.1
Ignition on, warning light extinguished
Lock the computer using the command on the fault finding tool.
Check the condition of the warning light bulb.
Ensure the insulation in relation to 12 volts of the connection between the warning light and track 7 of
the 30 track connector.
NoneNOTES CO.0
Lock the computer using the command on the fault finding tool.
Check the condition of the warning light bulb.
Ensure the continuity of the connection between the warning light and track 7 of the 30 track connector.
Ensure the presence of 12 volts on the warning light.
If the checks carried out have not enabled a fault to be found, disconnect the computer connector and fit
the XRBAG 30 track B40 adaptor.Use the XRBAG in its instrument panel warning light test mode with
grey adaptor cable 1 .
If the warning light can be illuminated by the XRBAG, replace the air bag computer (refer to the "Aid"
section for this operation ).
If the warning light can not be illuminated, repeat the checks described above.
Ignition on, warning light illuminated
Lock the computer using the command on the fault finding tool.
Disconnect the sir bag computer and check on the air bag computer base for the 5 shunt opening pins
for the connector. Ensure the insulation in relation to earth of the connection between the warning light
and track 7 of the 30 track connector.
Erase the computer memory and switch off the ignition.
Carry out a check using the fault finding tool and, in the absence of a fault,
unlock the computer.
FAULT FINDING- INTERPRETATION OF FAULTS
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Reconnect the computer and the pretensioner ignition module , switch the ignition on
again. Erase the computer memory, then switch off the ignition. Carry out a check using
the fault finding tool and, in the absence of a fault, unlock the computer. Destroy the
pretensioners if there has been a replacement (tool Elé. 1287).
AFTER REPAIR
Driver’s pretensioner circuit
CC : Short circuit
CO : Open circuit
CC.1 : Short circuit to 12 volts
CC.0 : Short circuit to earthDF029
present
NOTESNever carry out measures on the triggering lines with equipment other than the
XRBAG.
NoneNOTES CO - CC
Lock the computer using the command on the fault finding tool.
Switch off the ignition and check the ignition module for the driver’s pretensioner is correctly connected.
Disconnect the ignition module for the driver’s pretensioner and connect a dummy ignition module to
the ignition module connector.
Switch on the ignition and carry out a check using the fault finding tool.
Change the driver’s pretensioner if the fault has been memorised (fault no longer declared present).
Disconnect the computer connector and fit the 30 track B40 adaptor.
The XRBAG must be used to measure resistance on adaptor cable D. If the value obtained is not correct,
check the connections on the 30 track connector (tracks 1 and 2) and replace the wiring if necessary
If there is no evidence of a fault after these checks have been carried out, check on the air bag computer
base for the 5 shunt opening pins for the 30 track connector.
Check the condition of the computer connections.
Check the condition of the 30 track connector (locking system, ...).
The XRBAG must be used to measure resistance at point C1 (seat connector) on the driver’s pretensioner
line.
If the value obtained is not correct, replace the wiring between points C1 and C3 (seat wiring).
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