2011 RENAULT SCENIC Air Bag RC5 - Seat Belt Pretensioners Workshop Manual

8Electrical equipment
V5 MR-372-J84-88C100$TOC.mif
V5
88C
"The repair procedures given by the manufacturer in this document are based on the
technical specifications current when it was prepared.
The procedures may be modified as a result of changes introduced by the
manufacturer in the production of the various component units and accessories from
which his vehicles are constructed."
V5
All rights reserved by Renault s.a.s.
Edition Anglaise
Copying or translating, in part or in full, of this document or use of the service part
reference numbering system is forbidden without the prior written authority of
Renault s.a.s.
© Renault s.a.s. 2011
AIRBAGS AND PRETENSIONERS
AIRBAG RC5
Vdiag: 14
Fault finding – Introduction 88C - 2
Fault finding – System operation 88C - 11
Fault finding – Computer track allocation 88C - 12
Fault finding – Replacement of components 88C - 14
Fault finding – Configurations and programming 88C - 15
Fault finding – Fault summary table 88C - 19
Fault finding – Interpretation of faults 88C - 21
Fault finding – Conformity check 88C - 83
Fault finding – Summary table of statuses and parameters 88C - 84
Fault finding – Interpretation of statuses 88C - 85
Fault finding – Interpretation of parameters 88C - 86
Fault finding – Customer complaints 88C - 87
Fault finding – Fault Finding Chart 88C - 88

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AIRBAGS AND PRETENSIONERS
Fault finding – Introduction
1. SCOPE OF THIS DOCUMENT
This document presents the fault finding procedure applicable to all computers with the following specifications:
2. PREREQUISITES FOR FAULT FINDING
Documentation type
Fault finding procedures (this document):
– Assisted fault finding (integrated into the diagnostic tool), Dialogys.
Wiring Diagrams:
– Visu-Schéma (CD-ROM), paper.
Diagnostic tool type
–CLIP
Special tooling requiredVehicle(s): MEGANE II / SCENIC
Function concerned: AIRBAGComputer name: Autoliv RC5 P1/P2
Vdiag No.: 14
Special tooling required
Multimeter.
– Set of adapters and borniers for using the airbag and
pretensioner wiring harness check function on CLIP and XRBAG
tools for updates comprising the borniers listed below.
Modifying the series of new airbag ignition module connectors
entails modifying the dummy ignition module.
LOCAL MODIFICATION OF THE DUMMY IGNITION MODULE
Remove the ignition module from its red mounting and remove
one of the two brown locking notches.
Elé. 1685 Computer bornier 22 tracks
Elé. 1717 64-track computer bornier
Elé. 1617 Blue 8-trackSeat wiring harness test adapter
Elé. 1617 Rotary switch bornier 10 tracks
Adapter 2 tracks B36
ABGRC5_V14_PRELI
AIRBAG RC5
Vdiag: 14

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Vdiag: 14AIRBAGS AND PRETENSIONERS
Fault finding – Introduction88C
3. REMINDERS
To run fault finding on the vehicle's computers, switch on the ignition in fault finding mode (forced + after
ignition feed).
Proceed as follows:
– with the vehicle card in the RENAULT card reader,
– press and hold the Start button (for more than 5 seconds) with start-up conditions not fulfilled,
– connect the diagnostic tool and perform the required operations.
To cut off the + after ignition feed, proceed as follows:
– disconnect the diagnostic tool,
– press the Start button twice briefly (less than 3 seconds),
ensure that the + after ignition feed has been cut off by checking that the computer indicator lights on the instrument
panel have gone out.Note:

The left-hand and right-hand xenon bulb computers are powered when the dipped headlights are lit. Therefore
fault finding can only be carried out on them after the ignition has been switched on in fault finding mode (forced
+ after ignition feed) and the dipped headlights have been switched on.

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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

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Vdiag: 14AIRBAGS AND PRETENSIONERS
Fault finding – Introduction88C
4. FAULT FINDING PROCEDURE
Check battery charge and condition
of the fuses
Print the system fault finding log
(available on CLIP and in
the Workshop Repair Manual
or Technical Note)
Connect CLIP
NO
Dialogue with
computer?
YES
Read the faults
NO
Faults present
YES
Deal with present faults
Deal with stored faults
NO
The cause is still
presentFault
solved
YES
See ALP no. 1
Conformity check
NO
The cause is still
presentFault
solved
YES
Use fault finding charts (ALPs)
NO
The cause is still
presentFault
solved
YES
Contact the Techline with the
completed fault finding log

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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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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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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