seat memory RENAULT SCENIC 2011 J95 / 3.G Air Bag ACU4 - Seat Belt Pretensioners Workshop Manual

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 - 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

AIRBAG - SEAT BELT PRETENSIONERS
Fault finding - Interpretation of faults
88C-21
88C
V3 MR-372-J84-88C000$071.mif
AIRBAG ACU4
VDIAG No.: 04
DF010
PRESENT
FAULT WARNING LIGHT CIRCUIT
1.DEF: External diagnostics (instrument panel signal)
2.DEF: Consistency (dashboard indicator light state signal / airbag request)
NOTESSpecial notes: none.
Apply the fault finding procedure relevant to this fault in the instrument panel fault finding information section.
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

AIRBAG - SEAT BELT PRETENSIONERS
Fault finding - Interpretation of faults
88C-22
88C
V3 MR-372-J84-88C000$071.mif
AIRBAG ACU4
VDIAG No.: 04
DF028
PRESENT
PASSENGER AIRBAG STATUS INDICATOR LIGHT CIRCUIT
1.DEF: External diagnostics (instrument panel signal)
2.DEF: Consistency (dashboard indicator light state signal / airbag request)
NOTESSpecial notes: none.
Apply the fault finding procedure relevant to this fault in the instrument panel fault finding information section.
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

AIRBAG - SEAT BELT PRETENSIONERS
Fault finding - Interpretation of faults
88C-23
88C
V3 MR-372-J84-88C000$071.mif
AIRBAG ACU4
VDIAG No.: 04
DF034
PRESENT
COMPUTER LOCKED
NOTESSpecial notes: none.
Using the diagnostic tool, run command VP007 to unlock the airbag computer.
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

AIRBAG - SEAT BELT PRETENSIONERS
Fault finding - Interpretation of faults
88C-24
88C
V3 MR-372-J84-88C000$071.mif
AIRBAG ACU4
VDIAG No.: 04
DF039
PRESENT
DRIVER'S SIDE SENSOR CIRCUIT
CO: Open circuit
CC.0: Short circuit to earth
1.DEF: Communication disrupted
2.DEF: Sensor internal electrical fault
3.DEF: External diagnostics
NOTESSpecial notes: Use the 64-track adapter (Elé. 1717) when working on the computer
connector.
CO - CC.0 - 1.DEF
NOTESNone.
Lock the computer using the command on the diagnostic tool.
Check that the driver's side sensor is connected correctly and check its connections.
Check the condition of the connections on the computer (tracks 27 and 28).
Check the condition of the 64-track connector (locking system, connections, etc.).
Check the continuity and insulation of the connections between:
Bornier (Elé. 1717) terminal 27 Track 1 sensor connector
Bornier (Elé. 1717) terminal 28 Track 2 sensor connector
2.DEF - 3.DEF
NOTESIf the fault is still present, check whether the sensor fitted is
compatible with the airbag computer connected to the
vehicle. If not, order the sensor specifically for the airbag
fitted.
Replace the driver's side sensor.
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

AIRBAG - SEAT BELT PRETENSIONERS
Fault finding - Interpretation of faults
88C-25
88C
V3 MR-372-J84-88C000$071.mif
AIRBAG ACU4
VDIAG No.: 04
DF040
PRESENT
PASSENGER SIDE SENSOR CIRCUIT
CO: Open circuit
CC.0: Short circuit to earth
1.DEF: Communication disrupted
2.DEF: Sensor internal electrical fault
3.DEF: External diagnostics
NOTESSpecial notes: Use the 64-track adapter (Elé. 1717) when working on the computer
connector.
CO - CC.0 - 1.DEF
NOTESNone.
Lock the computer using the command on the diagnostic tool.
Check that the driver's side sensor is connected correctly and check its connections.
Check the condition of the connections on the computer (tracks 61 and 62).
Check the condition of the 64-track connector (locking system, connections, etc.).
Check the continuity and insulation of the connections between:
Bornier (Elé. 1717) terminal 61 Track 1 sensor connector
Bornier (Elé. 1717) terminal 62 Track 2 sensor connector
2.DEF - 3.DEF
NOTESIf the fault is still present, check whether the sensor fitted is
compatible with the airbag computer connected to the
vehicle. If not, order the sensor specifically for the airbag
fitted.
Replace the passenger side sensor.
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

AIRBAG - SEAT BELT PRETENSIONERS
Fault finding - Interpretation of faults
88C-26
88C
V3 MR-372-J84-88C000$071.mif
AIRBAG ACU4
VDIAG No.: 04
DF051
PRESENT
DRIVER'S SIDE SENSOR CONFIGURATION
NOTESSpecial notes: none.
This fault corresponds to an inconsistency between the computer configuration and the vehicle equipment
detected by the computer. The computer has detected the presence of a component additional to its
configuration.
Read configuration LC025 under the heading Read configuration.
Use command CF207 to modify the computer configuration to the vehicle's equipment level.
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