warning light RENAULT SCENIC 2011 J95 / 3.G Air Bag RC5 - Seat Belt Pretensioners Workshop Manual

88C-6
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V5
AIRBAG RC5
Vdiag: 14AIRBAGS AND PRETENSIONERS
Fault finding – Introduction88C
5. FAULT FINDING LOG
You will always be asked for this log:
– when requesting technical assistance from Techline,
– when requesting approval before replacing parts for which approval is compulsory,
– to be attached to monitored parts for which reimbursement is requested. The log is needed for warranty
reimbursement, and enables better analysis of the parts removed.
6. SAFETY INSTRUCTIONS
Safety rules must be observed during any work on a component to prevent any damage or injury:
– check the battery voltage to avoid incorrect operation of computer functions.
During work on the airbag/seat belt pretensioner systems, it is essential that you lock the computer using
the diagnostic tool to prevent any risk of accidental triggering (all the trigger lines will be disabled).
The locked mode is indicated when the instrument panel warning light comes on.
If it is impossible to connect the diagnostic tool, switch off the ignition, remove the system power supply
fuse and wait at least 2 seconds for the discharge of the reserve power capacity.
Never measure the airbag or pretensioner trigger lines with any device other than XRBAG or CLIP's "Airbag
and pretensioner wiring harness check".
Before using a dummy ignition module, check to make sure that its resistance is between 1.8 et 2.5 Ω.
During the procedure, check that the computer feed voltage does not drop below 10 V.
Disconnect the battery before removing and refitting any pyrotechnic component (airbag module,
pretensioner or seat belt retractor).IMPORTANTIMPORTANT
Any fault on a complex system requires thorough fault finding with the appropriate tools.
The FAULT FINDING LOG, which should be completed during the fault finding procedure,
ensures a record is kept of the procedure carried out. It is an essential document when
consulting the manufacturer.
IT IS THEREFORE ESSENTIAL THAT THE FAULT FINDING LOG IS FILLED OUT EVERY TIME IT IS
REQUESTED BY TECHLINE OR THE WARRANTY RETURNS DEPARTMENT.
IMPORTANT
Airbag and pretensioner destruction and scrapping is subject to national legislation.

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V5
AIRBAG RC5
Vdiag: 14AIRBAGS AND PRETENSIONERS
Fault finding – Introduction88C
SYSTEM CONFIGURATION SHEET (FRONT section of the vehicle)
ACentral unitGPassenger's frontal airbag ignition module
BDriver’s seatHFront lap pretensioner/Seat airbag
CFront passenger seatI/JFront pyrotechnic pretensioners
DFront chest level side airbag ignition
moduleCTRotary switch + 12V/Earth
EDriver's frontal airbag ignition modulePWarning light / Diagnostic lines
Impact sensors/Impact signal
Passenger airbag locking switch/...
K M
M F
A
CT
E1
E2
G1
G2
J
F M
F M
F M
F M
F M
F M
M F
M F
C
IH D
C CCC
C
BP
M F
C2
To rear wiring

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AIRBAGS AND PRETENSIONERS
Fault finding – System operation
The purpose of the air bag system RC5 P1/P2 is to provide optimum safety protection for all of the vehicle
occupants.
Special notes:
The MEGANE is equipped with driver and passenger seat belt buckle pretensioners in the front section.
The MEGANE is equipped with an "anti-submarine" airbag inside the seat base
The MEGANE is equipped with driver and passenger chest-level airbags in the rear section.

On MEGANE phase 1,
Warning light management: the status of the airbag fault warning light takes priority in relation to the status of
the passenger airbag warning light.
Impact management: a single level is emitted over the CAN line.
On MEGANE phase 2,
Warning light management: the two warning lights cannot be separated and the status of the passenger airbag
warning light is maintained when the airbag fault warning light illuminates.
Impact management: two levels of separate impacts are emitted over the CAN line.
Frontal impacts:
This function is performed entirely inside the computer. Accelerometers measure the violence of the impact. Vehicle
speed, driver's seat position, passenger airbag locking switching position and the accelerometer measurements
determine the strategy that the computer adopts to trigger the ignition modules. The front and rear seat belt inertia
reels, the front seat belt pretensioners, the face air bags (levels 1 and 2) can also be triggered or not according to
the entry parameters.
Side impacts:
This function is performed by the computer and the side impact sensors.
The position of the passenger airbag locking switch and the accelerometer measurements determine the strategy
that the computer adopts to trigger the ignition modules. The seat belt inertia reels, the seat belt pretensioners,
the front chest airbags and the curtain airbags thus may or may not be triggered.
Seat belt locking monitoring:
This function is performed by the instrument panel. The computer only sends the driver's seat belt buckle sensor
status. A warning light on the instrument panel is displayed if the driver is not wearing his seat belt, and a buzzer
reminds the driver of this when the vehicle speed exceeds 12 mph (20 km/h).
Inhibition of passenger trigger lines:
This function is performed by the computer and the passenger airbag locking switch.
The choice of whether or not to deactivate the passenger airbags must be made before the vehicle speed exceeds
0.3 mph (0.5 km/h). The computer measures an impedance (100Ω= Passenger Airbag deactivated;
400Ω= Passenger Airbag active). Above the threshold, any action on the locking switch results in storage of
the fault DF193and the instrument panel warning light is illuminated.
The front passenger airbag (levels 1 and 2), the passenger lap belt pretensioner and the front passenger
chest-level airbag are deactivated when the locking switch is in the OFF position or when the fault
DF193 "Change of passenger airbag locking status" is present in the computer memory.
Monitoring the information displayed on the instrument panel:
The instrument panel controls the correct working of warning lights "air bag failure" and "air bag OFF" and informs
the air bag computer about possible warning light circuit failures through the multiplex network.
AIRBAG RC5
Vdiag: 14

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AIRBAGS AND PRETENSIONERS
Fault finding – Replacement of components
REPLACING A SYSTEM COMPONENT
Disconnect the battery before removing and refitting any pyrotechnic component (airbag module,
pretensioner or seat belt retractor).
REPLACING THE AIRBAG COMPUTER
BEFORE REPLACING THE COMPUTER IT IS ESSENTIAL THAT YOU CONTACT THE TECHLINE.
To ensure that the returned computer's fault can be analysed, do not use command RZ001 "Fault memory"
when DF001 "Computer" is present or stored.
The airbag computers are sold in locked mode to avoid all risk of accidental triggering (all ignition lines are inhibited).
The "locked" mode is indicated when the airbag fault warning light on the instrument panel illuminates.
Follow this procedure to replace an airbag computer:
– check that the ignition is switched off,
– replace the computer,
– modify the computer configuration if necessary,
– write the VIN to the computer using the diagnostic tool command VP010 Write VIN,
– switch off the ignition,
– carry out a check using the diagnostic tool,
– unlock the computer using the command VP007 Unlock computer, only if there are no faults declared by the
diagnostic tool and check that the warning light has gone out.
After the computer has been replaced, if there are abnormalities on the impact sensors, it is necessary to check that
the sensors fitted are compatible with the airbag computer connected to the vehicle. If not, it is necessary to order
the sensors which are specifically for the respective airbag.
Note:
After the airbag computer is replaced, if the engine no longer starts, restore the injection operation by applying the
following procedure:
– Run command RZ001 to clear the faults from the injection computer memory (even if no present or stored faults
are declared).
– Switch off the ignition and wait for loss of dialogue with the injection computer.
–Drive for 1 minute at a speed greater than 21 mph (35 km/h) to restore the operation of the steering column
lock.
AIRBAG RC5
Vdiag: 14

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AIRBAGS AND PRETENSIONERS
Fault finding – Fault summary table
Tool fault Associated DTC Diagnostic tool title
DF001 9080Computer
DF002 F003Computer feed voltage
DF010 80D2Fault warning light circuit
DF028 80D5Passenger airbag status warning light circuit
DF034 907EComputer locked
DF038 8092Driver's side sensor
DF043 8097Passenger's side sensor
DF060 C001Multiplex network
DF065 80B7Driver's front seat position sensor circuit
DF066 8038Passenger's rear side airbag circuit
DF067 8030Driver's rear chest side airbag circuit
DF068 8028Passenger's chest front side airbag circuit
DF069 8029Passenger side curtain airbag circuit
DF070 8021Driver's side curtain airbag circuit.
DF071 8002Driver's front airbag circuit 2
DF072 8001Driver's front airbag circuit 1
DF074 8011Passenger front air bag circuit 2
DF075 8010Passenger's front airbag circuit 1
DF077 8020Driver's front side chest airbag circuit
DF081 9001Driver's seat belt pretensioner
DF082 9002Passenger seat belt pretensioner
DF091 80DFAirbag locking switch circuit
AIRBAG RC5
Vdiag: 14

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AIRBAGS AND PRETENSIONERS
Fault finding – Interpretation of faults
AIRBAG RC5
Vdiag: 14
88C
DF010
PRESENT
OR
STOREDFAULT WARNING LIGHT CIRCUIT
1.DEF: Consistency. (Status signal of the instrument panel indicator light/airbag
request)
2.DEF: External fault finding in the domain. (Instrument panel signal)
NOTESNone.
Apply the fault finding procedure relevant to this fault in the instrument panel fault finding information section.
AFTER REPAIRClear the computer fault memory. Switch off the ignition.
Carry out the check again using the diagnostic tool and, if there is no fault, unlock the
computer.
ABGRC5_V14_DF010

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AIRBAGS AND PRETENSIONERS
Fault finding – Interpretation of faults
AIRBAG RC5
Vdiag: 14
88C
DF028
PRESENT
OR
STOREDPASSENGER AIRBAG STATUS WARNING LIGHT CIRCUIT
1.DEF: Consistency. (Status signal of the instrument panel indicator light/airbag
request)
2.DEF: External fault finding in the domain. (Instrument panel signal)
NOTESNone.
Apply the fault finding procedure relevant to this fault in the instrument panel fault finding information section.
AFTER REPAIRClear the computer fault memory. Switch off the ignition.
Carry out the check again using the diagnostic tool and, if there is no fault, unlock the
computer.
ABGRC5_V14_DF028

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AIRBAGS AND PRETENSIONERS
Fault finding – Interpretation of faults
AIRBAG RC5
Vdiag: 14
88C
DF034
PRESENT
OR
STOREDCOMPUTER LOCKED
NOTESNone.
Using the diagnostic tool, run the command VP007 Unlock computer to unlock the airbag computer (unlock
the computer only if no faults are declared by the diagnostic tool and check that the warning light has gone out).
AFTER REPAIRClear the computer fault memory. Switch off the ignition.
Carry out the check again using the diagnostic tool and, if there is no fault, unlock the
computer.
ABGRC5_V14_DF034

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V5
AIRBAGS AND PRETENSIONERS
Fault finding – Interpretation of faults
AIRBAG RC5
Vdiag: 14
88C
DF193
PRESENT
OR
STOREDPASSENGER AIRBAG LOCKING CHANGE OF STATUS
NOTESSpecial notes:
The vehicle user must deactivate or reactivate the passenger airbag using the switch
before the vehicle exceeds a speed of 0.3 mph (0.5 km/h). Above this speed,
the computer stores this fault and illuminates the instrument panel warning light.
Clear the computer fault memory.
Switch off the ignition, and wait a few seconds.
Set the locking switch to the desired setting.
Switch the ignition back on and check that the fault is no longer present.
AFTER REPAIRClear the computer fault memory. Switch off the ignition.
Carry out the check again using the diagnostic tool and, if there is no fault, unlock
the computer.
ABGRC5_V14_DF193

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AIRBAGS AND PRETENSIONERS
Fault finding – Conformity check
NOTESOnly carry out this conformity check after having carried out a complete check using
the diagnostic tool.
FunctionParameter or status
checked or actionDisplay and notes Fault finding
Dialogue
diagnostic tool-Airbag RC5 P1/P2Consult ALP1
Computer
conformityLC034 Type of vehicleCheck that the computer
configuration corresponds to
the vehicle.CF215 Vehicle type
Computer/Ignition
lines configurationUsing the READ
CONFIGURATION
commandsCheck that the computer
configurations match
the actual equipment fitted to
the vehicle.Using the commands SC005
Configuration of system
components
Operation of
the warning light.
Computer
initialisation check.Ignition onThe warning light illuminates
for 3 seconds when
the ignition is switched on.None
ABGRC5_V14_CCONF
AIRBAG RC5
Vdiag: 14