RENAULT SCENIC 2011 J95 / 3.G Air Bag ACU4 - Seat Belt Pretensioners User Guide

AIRBAG - SEAT BELT PRETENSIONERS
Fault finding - Computer track allocation
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V3 MR-372-J84-88C000$030.mif
AIRBAG ACU4
Vdiag: 04
SIDE IMPACT SENSORS CONNECTIONS
2-track connector
Track Description Track Description
1 Signal +2 Signal -
Note:
The front belt pretensioners, front chest side airbags, lap pretensioners or seat airbags and seat position
sensor functions run through a black 22-track R341 or R342 intermediate connector located under each seat
and attached to the vehicle floor.
ACU4 Vdiag04 J84 1.0

AIRBAG - SEAT BELT PRETENSIONERS
Fault finding – Replacement of components
88C-12
88C
V3 MR-372-J84-88C000$040.mif
AIRBAG ACU4
VDIAG No.: 04
AIRBAG - SEAT BELT PRETENSIONERS
Fault finding – Replacement of components
REPLACING THE AIRBAG COMPUTER
BEFORE REPLACING ANY COMPUTER, YOU ARE REQUIRED TO CONTACT YOUR
TECHLINE.
So that the failure of the returned computer can be analyzed, the use of command RZ001
"erase fault memory" when DF001 "Computer" is present or stored is officially prohibited.
The airbag computers are sold in locked mode to avoid all risk of accidental triggering (all ignition lines are
inhibited).
The locked mode is signalled when the airbag fault warning indicator lights up on the instrument panel.
Follow this procedure to replace an airbag computer:
– Ensure that the ignition is switched off.
– Replace the computer.
– Modify the computer configuration if necessary.
– Enter the VIN into the computer with diagnostic tool command VP010 Write VIN.
– Switch off the ignition.
– Carry out a check using the diagnostic tool.
– Enter the After Sales operation date with diagnostic tool command VP008 Write last After Sales operation
date.
– Unlock the computer only if no faults are indicated by the diagnostic tool.
After an ACU4 computer has been replaced with a RC5 computer, it is also necessary to replace the impact
sensors. The ACU4 sensors are incompatible with the RC5 computer.
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.
ACU4 Vdiag04 J84 1.0

AIRBAG - SEAT BELT PRETENSIONERS
Fault finding - Configuration and programming
88C - 13
88C
V3 MR-372-J84-88C000$050.mif
AIRBAG ACU4
Vdiag: 04
AIRBAG - SEAT BELT PRETENSIONERS
Fault finding - Configuration and programming
CLEARING
RZ001: Fault memory.
This command is used to clear faults from the computer's memory.
CONFIGURATION / READ CONFIGURATION:
– To make it easier to configure airbag computerACU4, the fault-finding tool has five automatic
configuration commands for the trigger lines and sensors installed in the vehicles (BMXX, CMXX,
SMXX).
The commands in the table on the next page, however, are used to configure each system
component individually to adapt the computer configuration to the actual equipment in the
vehicle.
– The read-configuration commands (LCXXX) are used to display the current computer configuration
in relation to the trigger lines and sensors installed in the vehicle.
– The configuration commands (CFXXX) are used to adjust computer configuration to the equipment
actually installed in the vehicle.
– STANDARD CONFIGURATION COMMANDS:
–CF297: B/C NO SIDE AIRBAGS.
Vehicle types B, C WITH NO FRONT AND REAR FRONTAL SIDE AIRBAGS AND NO SIDE
CURTAIN AIRBAGS (SABLAT / SSABCS).
–CF298: B/C WITH FRONT FRONTAL + CURTAIN AIRBAGS.
Vehicle types B, C with FRONT FRONTAL SIDE AIRBAGS + SIDE CURTAIN AIRBAGS
(ABLAVI / SSABCS).
–CF299: B/C WITH FRONT/REAR FRONTAL + CURTAIN AIRBAGS.
Vehicle types B, C with FRONT AND REAR FRONTAL SIDE AIRBAGS + SIDE CURTAIN
AIRBAGS (ABLAT / SSABCS).
–CF300: VAN WITH CURTAIN AIRBAGS.
Three S vehicles (vans) equipped with CURTAIN SIDE AIRBAGS (ABLAT / SSABCS).
–CF301: VAN WITH NO CURTAIN AIRBAGS.
Three S vehicles (vans) WITHOUT CURTAIN SIDE AIRBAGS (ABLAVI / SSABCS).
Because of probably computer part number unification in the Parts Department, some sensors
or trigger lines may have to be deconfigured after using standard configuration commands. For
this, use the individual configuration commands for system components.
After configuration, check the display configuration screen to make sure that the information
entered is correct.
ACU4 Vdiag04 J84 1.0
MR-372-J84-88C000$050.mif

AIRBAG - SEAT BELT PRETENSIONERS
Fault finding - Configuration and programming
88C - 14
88C
V3 MR-372-J84-88C000$050.mif
AIRBAG ACU4
Vdiag: 04
CONFIGURATION / READ CONFIGURATION:
– CONFIGURABLE FEATURES:
Trigger lines "WITH" or "WITHOUT":
The front buckle pretensioners are serially wired.
The rear seat belt retractors are serially wired.
Sensors "
WITH" or "WITHOUT":
TITLECONFIGURATION
READINGCONFIGURATION
SEAT-CUSHION AIRBAG/DRIVER'S SEAT LAP BELT.
PASSENGER'S SEAT-CUSHION AIRBAG / LAP BELT
PASSENGER FRONT AIRBAG CIRCUIT 1
PASSENGER FRONT AIRBAG CIRCUIT 2
DRIVER'S FRONT AIRBAG CIRCUIT 1
DRIVER'S FRONT AIRBAG CIRCUIT 2
DRIVER'S SIDE CURTAIN AIRBAG
PASSENGER SIDE CURTAIN AIRBAG
DRIVER'S FRONT CHEST SIDE AIRBAG
PASSENGER FRONT CHEST SIDE AIRBAG
DRIVER'S REAR CHEST SIDE AIRBAG
PASSENGER REAR CHEST SIDE AIRBAG
FRONT BUCKLE PRETENSIONERS
REAR INERTIA REELSLC080
LC079
LC052
LC047
LC048
LC049
LC040
LC041
LC042
LC043
LC044
LC045
LC081
LC078CF283
CF282
CF236
CF229
CF230
CF231
CF221
CF222
CF223
CF224
CF225
CF226
CF284
CF278
TITLECONFIGURATION
READINGCONFIGURATION
DRIVER'S SEAT POSITION SENSOR
DRIVER'S SIDE SENSOR
PASSENGER SIDE SENSOR
DRIVER'S SEAT BELT BUCKLE SENSORLC086
LC025
LC026
LC073CF289
CF207
CF208
CF273
ACU4 Vdiag04 J84 1.0

AIRBAG - SEAT BELT PRETENSIONERS
Fault finding - Configuration and programming
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88C
V3 MR-372-J84-88C000$050.mif
AIRBAG ACU4
Vdiag: 04
CONFIGURATION / READ CONFIGURATION (continued):
Passenger airbag lock mode "WITH KEY" or "WITHOUT":
Read type of vehicle: LC034 "MEGANE II"
OTHER COMMANDS:
–VP006: Lock computer.
This command is used whenever servicing the system. It shuts down all trigger lines.
–VP007: Unlock computer.
This command unlocks the computer after it was locked.
–VP008: Write last After Sales service date.
This command is used to enter the date the system was serviced.
–VP010: Write VIN.
This command serves to enter the vehicle identification number (VIN) into the computer.
–SC004: Read impact context.
This command is used in reconditioning the vehicle following an impact. It obtains, from the
computer that is to be replaced, a list of the trigger lines controlled and the system's state at the
moment of impact.TITLECONFIGURATION
READINGCONFIGURATION
PASSENGER AIRBAG LOCK MODELC060 CF248
ACU4 Vdiag04 J84 1.0

List of monitored parts: Airbag computer
FAULT FINDING LOG
System: Airbags and pretensionersPage 1 / 2
●Administrative identification
Date 2 0
Log completed by
Business name or no./
Country
Vehicle model
VIN:
Engine
Diagnostic tool CLIP
Version
●Customer complaint
1192 Airbag warning light lit
OtherPlease specify:
●
When the fault appears
011 When switched on 004 Intermittently 999 When starting the engine
005 While driving
OtherPlease specify:
●
Documentation used in fault finding
Fault finding procedure
Type of fault finding manual:
Workshop Repair Manual: Technical Note Assisted fault finding
Fault Finding Manual No.:
Wiring diagram used
Wiring Diagram Technical Note No.:
Other documentation
Title and/or part no.:
FD 16
Fault finding log
page to print or photocopy - page to print or photocopy - page to print or photocopy

To be read with the diagnostic tool (Identification screen):
FAULT FINDING LOG
System: Airbag and pretensionersPage 2 / 2
●Identification of the computer and parts replaced for the system
Part 1 part no.
Part 2 part no.
Part 3 part no.
Part 4 part no.
Part 5 part no.
Computer part no.
Supplier no.
Program no.
Software version
Calibration number
VDIAG
●Faults found with the diagnostic tool
Fault no. Present Stored Fault title Specification
●
System-specific information
Total vehicle mileage (kilometrage) when the customer's problem
occurred:
How often does it occur?
How long after the engine starts?
●Additional information
What factors led you to replace the
computer?
What other parts were replaced?
Other faulty functions?
CAN
Wiring harness
SeatsInstrument panel
Battery
OtherRotary switch
Fuse
Please specify:
FD 16
Fault finding log
page to print or photocopy - page to print or photocopy - page to print or photocopy

AIRBAG - SEAT BELT PRETENSIONERS
Fault finding - Summary table of faults
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V3
AIRBAG - SEAT BELT PRETENSIONERS
Fault finding - Summary table of faults
AIRBAG ACU4
Vdiag: 04
Tool fault Associated DTC Diagnostic tool heading
DF001
DF002
DF010
DF028
DF034
DF039
DF040
DF051
DF052
DF053
DF060
DF065
DF066
DF067
DF068
DF069
DF070
DF071
DF072
DF074
DF075
DF077
DF091
DF187
DF193
DF194
DF210
DF214
DF232
DF239
DF240
DF2419080
9042
9040
9041
907E
9035
9036
9035
9036
9031
9050
9031
900E
900D
900C
900A
9009
9008
9007
9006
9005
900B
9034
9044
907C
907F
9014
9034
9051
9017
9001
9002Computer
Computer supply voltage
Fault warning light circuit
Passenger's airbag status warning light circuit
Computer locked
Driver's side sensor circuit
Passenger's side sensor circuit
Driver's side sensor configuration
Passenger side sensor configuration
Driver's seat position sensor
Multiplex network
Driver's front seat position sensor circuit
Passenger's rear side air bag circuit
Driver's rear chest side airbag circuit
Passenger's front side airbag circuit
Passenger's curtain side airbag circuit
Driver's head side airbag circuit.
Driver's front airbag circuit 2
Driver's front airbag circuit 1
Passenger's front airbag circuit 2
Passenger's front airbag circuit 1
Driver's front side airbag circuit
airbag locking switch circuit
Trigger lines configuration
Change of status of passenger airbag locking
Computer to be replaced following impact
Front buckles pretensioner circuit
Airbag lock switch configuration
Driver's seat belt buckle sensor circuit
Rear seat belt retractors circuit
Driver's seat-cushion / seat lap belt circuit
Passenger's seat-cushion / seat lap belt circuit
ACU4 Vdiag04 J84 1.0
MR-372-J84-88C000$060.mif

AIRBAG - SEAT BELT PRETENSIONERS
Fault finding - Interpretation of faults
88C-19
88C
V3 MR-372-J84-88C000$071.mif
AIRBAG ACU4
VDIAG No.: 04
AIRBAG - SEAT BELT PRETENSIONERS
Fault finding - Interpretation of faults
DF001
PRESENT
OR
STOREDCOMPUTER
NOTESSpecial notes: So that the failure of the returned computer can be analysed, the
use of command RZ001 "Erase fault memory" when DF001 "Computer" is
present or stored is officially prohibited.
Replace the airbag computer (see the Replacement of components section for this procedure).
AFTER REPAIRDeal with any faults declared by the diagnostic tool.
Clear the computer memory.
ACU4 Vdiag04 J84 1.0
MR-372-J84-88C000$071.mif MR-372-J84-88C000$071.mif

AIRBAG - SEAT BELT PRETENSIONERS
Fault finding - Interpretation of faults
88C-20
88C
V3 MR-372-J84-88C000$071.mif
AIRBAG ACU4
VDIAG No.: 04
DF002
PRESENT
COMPUTER SUPPLY VOLTAGE
1.DEF: Micro-cut
2.DEF: Values beyond tolerance
NOTESSpecial notes: Use the 22-track adapter (Elé. 1685 when working on the computer
connector (cable 1).
Carry out the operations necessary to obtain the correct voltage supply to the computer: 10.5 V ± 0.1 < correct
voltage < 16 V ± 0.1.
– Check the battery charge.
– Check the charging circuit.
– Check the tightness and the condition of the battery terminals.
– Check the computer earth.
– Check the condition of the computer + locking connections.
AFTER REPAIRClear the computer memory then switch off the ignition.
Carry out the check again using the diagnostic tool and, if there are no faults, unlock
the computer.
ACU4 Vdiag04 J84 1.0