2011 RENAULT SCENIC display

88C-4
MR-372-J84-88C100$059.mif
V5
AIRBAG RC5
Vdiag: 14AIRBAGS AND PRETENSIONERS
Fault finding – Introduction88C
Faults
Faults are declared present or stored (depending on whether they appeared in a certain context and have
disappeared since, or whether they remain present but are not diagnosed within the current context).
The present or stored status of the faults should be taken into consideration when the diagnostic tool is used after
the + after ignition feed has been connected (with no action on the system components).
For a fault present, apply the procedure described in the section on the Interpretation of faults.
For a stored fault, note the faults displayed and apply the instructions in the Notes section.
If the fault is confirmed when the instructions in the Notes section are applied, the fault is present. Deal with
the fault.
If the fault is not confirmed, check:
– the electrical lines which correspond to the fault,
– the connectors for these lines (for oxidation, bent pins, etc.),
– the resistance of the component detected as defective,
– the condition of the wires (melted or cut insulation, wear),
– or use the fault finding procedure to check the circuit of the component at fault.
Conformity check
The aim of the conformity check is to check data that does not produce a fault on the diagnostic tool because
the data is inconsistent. Therefore, this stage is used to:
– run fault finding on faults that do not have a fault display, and which may correspond to a customer complaint,
– check that the system is operating correctly and that there is no risk of a fault recurring after repairs.
This section gives the fault finding procedures for statuses and parameters and the conditions for checking them.
If a status is not behaving normally or a parameter is outside the permitted tolerance values, consult the
corresponding fault finding page.
Customer complaints - Fault finding chart
If the test with the diagnostic tool is OK but the customer complaint is still present, the fault should be processed by
customer complaints.
A summary of the overall procedure to follow is provided on the following page in
the form of a flow chart

88C-8
MR-372-J84-88C100$059.mif
V5
AIRBAG RC5
Vdiag: 14AIRBAGS AND PRETENSIONERS
Fault finding – Introduction88C
Correct insulation value: display > = 100 h or 9999 flashing. FRONTAL AIRBAGS
Measuring point Correct value
DriverC0, C2 and C4 1.8 to 6.2 Ω
PassengerC0 and C4 1.8 to 4Ω
SIDE AIRBAGS AND SEAT BELT RETRACTORS-
PRETENSIONERS
Measuring point Correct value
C0, C1 and C3 1.8 to 4Ω

88C-9
MR-372-J84-88C100$059.mif
V5
AIRBAG RC5
Vdiag: 14AIRBAGS AND PRETENSIONERS
Fault finding – Introduction88C
SYSTEM CONFIGURATION SHEET (REAR section of the vehicle)
ACentralised unit
J/KSide curtain airbag ignition modules
L/M Rear chest-level side airbag ignition modules
N/O Rear pyrotechnic seat belt inertia reels
Correct insulation value: display > = 100 h or 9999 flashing. FRONTAL AIRBAGS
Measuring point Correct value
DriverC0, C2 and C4 1.8 to 6.2 Ω
PassengerC0 and C4 1.8 to 4Ω
SIDE AIRBAGS AND SEAT BELT RETRACTORS- PRETENSIONERS
Measuring point Correct value
C0, C1 and C3 1.8 to 4Ω
A
C0
C3
C3
C3 C3 C3
C3
J
K
LM
NO

88C-11
MR-372-J84-88C100$118.mif
V5
88C
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

88C-18
MR-372-J84-88C100$295.mif
V5
AIRBAG RC5
Vdiag: 14AIRBAGS AND PRETENSIONERS
Fault finding – Configurations and programming88C
OTHER COMMANDS
–VP006: Lock computer.
This command should be used for any operation on the system. It permits inhibition of all trigger lines.
–VP007: Unlock computer.
This command is used to unlock the computer when it is new or if it has been deactivated via the
command VP006.
–VP010: Enter VIN.
This command is used to enter the VIN number into the computer.
–SC004: Read impact context.
Use this command during repair of the vehicle following an impact. The command enables the list of
trigger lines active and the system status upon impact to be accessed in the computer which is being
replaced.
–SC005: Configuration of System Components.
This command is used to configure the ignition lines and the vehicle sensors.
The command displays the current configuration of the ignition lines and sensors and is used to enter the
required configurations in accordance with the specifications of each vehicle.

88C-83
MR-372-J84-88C100$590.mif
V5
88C
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