RENAULT TWINGO RS 2009 2.G Electrical Equipment - Airbags And Pretensioners Repair Manual

88C-61
MR-413-X44-88C000$693.mif
V3
88C
AIRBAGS AND PRETENSIONERS
Fault finding - Conformity check
MAIN COMPUTER STATUSES AND PARAMETERS
NOTESOnly check the conformity after a complete check with the diagnostic tool. The
values shown in this conformity check are given as a guide.
Application conditions: Engine stopped, ignition on.
FunctionParameter or Status
checked or ActionDisplay and
notesFault finding
Main
computer
Statuses and
ParametersET073:Computer locked
by toolYES or NO
This status indicates whether or not
the computer is locked.In the event of a fault, apply the
interpretation for DF034
"Computer locked".
ET143:Passenger
airbag(s) lockedYES or NO
This status indicates the locking of
the passenger trigger lines
(passenger front airbag, passenger
chest-level airbag).In the event of a fault, apply the
interpretation of DF193
"Passenger airbag locking
status change".
ET076:Computer to be
replacedYES or NO
This status indicates whether the
computer should be replaced or not.In the event of a fault, apply the
interpretation of DF001
"Computer" and DF194
"Computer to be replaced
following impact".
ET010: Impact detectedYES or NO
This status indicates whether an
impact has been detected by the
computer.In the event of a fault, apply the
interpretation of DF194 "Computer
to be replaced following impact".
ET074:Fault warning
light activatedYES or NO
This status permits a check on the
request by the computer for the
"airbag fault" indicator light to be lit
or not.In the event of a fault, apply the
interpretation of DF165 "Airbag
fault warning light circuit".
ET072:Passenger airbag
status indicator
light commandedYES or NO
This status permits a check on the
request by the computer for the
"passenger airbag" indicator light
to be lit.In the event of a fault, apply the
interpretation of DF028
"Passenger airbag status
indicator light circuit".
PR001:Computer feed
voltageThis parameter indicates the
computer voltage.
The voltage should
be between:
9 V < X < 14 VIn the event of a fault, apply the
interpretation for DF038
"Computer".
ET169:Driver's seat belt
contactOPEN - CLOSED - FAULTY
This status is used to check whether
the driver buckle switch is working
properly.In the event of a fault, apply the
interpretation of DF232 "Driver's
seat belt buckle sensor circuit".
ABGMRSZ_V04_CCONF
MR-413-X44-88C000$693.mif
MRSZ AIRBAG
Vdiag: 04

88C-62
MR-413-X44-88C000$693.mif
V3
MRSZ AIRBAG
Vdiag: 04AIRBAGS AND PRETENSIONERS
Fault finding - Conformity check88C
FUNCTION: AIRBAG
SUB-FUNCTION: TRIGGERING
NOTESOnly check the conformity after a complete check with the diagnostic tool. The
values shown in this conformity check are given as a guide.
Application conditions: Engine stopped, ignition on.
FunctionParameter or Status
checked or ActionDisplay and Notes Fault finding
TriggeringPR013:Driver's front airbag
resistance
The resistance should be
between:
1.2 Ω < X < 5.8 Ω
This value may be 99.9 Ω if
the vehicle is not fitted with
the airbag in question
(see vehicle equipment).
These parameters indicate
the impedance in ohms on
trigger lines.In the event of a fault, apply the
interpretation of DF003 "Driver's front
airbag circuit".
PR014:Passenger front
airbag resistanceIn the event of a fault, apply the
interpretation of DF004 "Passenger
front airbag circuit".
PR011:Driver's side airbag
resistanceIn the event of a fault, apply the
interpretation of DF077 "Driver's front
chest-level side airbag circuit"
.
PR012:Passenger side
airbag resistanceIn the event of a fault, apply the
interpretation of DF068 "Passenger
front chest-level side airbag circuit"
.
PR017:Driver's side
curtain airbag
resistanceIn the event of a fault, apply the
interpretation of DF070 "Driver's side
curtain airbag circuit".
PR018:Passenger side
curtain airbag
resistanceIn the event of a fault, apply the
interpretation of DF069 "Passenger
side curtain airbag circuit".
PR015:Driver’s
pretensioner
resistanceIn the event of a fault, apply the
interpretation of DF183 "Driver's
buckle pretensioner circuit"
.
PR016:Passenger
pretensioner
resistanceIn the event of a fault, apply the
interpretation of DF184 "Passenger
buckle pretensioner circuit"
.

88C-63
MR-413-X44-88C000$693.mif
V3
MRSZ AIRBAG
Vdiag: 04AIRBAGS AND PRETENSIONERS
Fault finding - Conformity check88C
FUNCTION: AIRBAG
SUB-FUNCTION: LOCK AIRBAGS
NOTESOnly check the conformity after a complete check with the diagnostic tool. The
values shown in this conformity check are given as a guide.
Application conditions: Engine stopped, ignition on.
FunctionParameter or Status
checked or ActionDisplay and
notesFault finding
Lock AirbagsET073:Computer locked
by toolYES or NO
This status indicates whether or
not the computer is locked.In the event of a fault, apply the
interpretation of DF034 "Computer
locked".
ET143:Passenger
airbag(s) lockedYES or NO
This status indicates the locking
of the passenger trigger lines
(passenger front airbag,
passenger chest-level airbag,
if fitted).In the event of a fault, apply the
interpretation of DF193 "Change of
passenger airbag locking status"
and DF091 "Airbag locking switch
circuit".
ET103:Type of
passenger airbag
lockingYES or NO
This status indicates the
inhibited trigger lines when the
passenger airbag is inhibited
(passenger front airbag,
passenger front chest-level
airbag, if fitted).In the event of a fault, apply the
interpretation of DF091 "Airbag
locking switch circuit " then DF193
"Change of passenger airbag
locking status".
ET169:Driver's seat belt
contactOPEN - CLOSED - FAULTY
This status is used to check
whether the driver buckle switch
is working properly.In the event of a fault, apply the
interpretation of DF232 "Driver's seat
belt buckle sensor circuit".
PR147:Airbag locking
circuit
impedance380 Ω +/- 40 Ω, this resistance
indicates that the passenger
airbag locking switch is "ON".
or
90 Ω +/- 10 Ω, this resistance
indicates that the passenger
airbag locking switch is "OFF"In the event of a fault, apply the
interpretation of DF091 "Airbag
locking switch circuit " then DF193
"Change of passenger airbag
locking status".

88C-64
MR-413-X44-88C000$770.mif
V3
88C
AIRBAGS AND PRETENSIONERS
Fault finding - List of Statuses and parameters
Trigger line or sensor resistance is equal to 99.9 Ω when the component is disconnected or not controlled by the
computer.Tool status Diagnostic tool title
ET010Impact detected
ET072Passenger airbag status indicator light commanded
ET073Computer locked by tool
ET074Fault warning light activated
ET076Computer to be replaced
ET103Type of passenger airbag locking
ET143Passenger airbag(s) locked
ET169Driver's seat belt contact
Tool parameter Diagnostic tool title
PR001Computer feed voltage
PR011Driver's side airbag resistance
PR012Passenger side airbag resistance
PR013Driver's front airbag resistance
PR014Passenger front airbag resistance
PR015Driver’s pretensioner resistance
PR016Passenger pretensioner resistance
PR017Driver's side curtain airbag resistance
PR018Passenger side curtain airbag resistance
PR147Airbag locking circuit impedance
MR-413-X44-88C000$770.mif
MRSZ AIRBAG
Vdiag: 04

88C-65
MR-413-X44-88C000$847.mif
V3
88C
AIRBAGS AND PRETENSIONERS
Fault finding - Customer complaints
NOTESOnly refer to the customer complaints after performing a complete check using
the diagnostic tool.
ABSENCE OF DIALOGUE WITH THE AIR BAG COMPUTER ALP 1
MR-413-X44-88C000$847.mif
MRSZ AIRBAG
Vdiag: 04

88C-66
MR-413-X44-88C000$924.mif
V3
88C
AIRBAGS AND PRETENSIONERS
Fault finding - Fault Finding Chart
ALP 1 No communication with the airbag computer
NOTESSpecial note:
See "Introduction" for the + after ignition feed to perform fault finding on a
computer.
Use the W iring Diagrams Technical Note, New TWINGO.
Try to establish dialogue with a computer on another vehicle to make sure that the diagnostic tool is not faulty. If
the tool is not the cause and communication cannot be established with any other computer on the same vehicle,
it is possible that another computer is disrupting the multiplex network.
Proceed by successive disconnections to locate the defective computer. Check the battery voltage and perform
the necessary operations to reach the correct voltage.
(10.5 V < battery voltage < 16 V).
Check for the presence and condition of the supply fuse (F7 15A) of the airbag computer component code 756
on the passenger compartment fuse box component code 1016.
Check the connection of the airbag computer connector, component code 756 and the condition of its
connections.
If the connector is faulty and there is a repair procedure (see Technical Note 6015A, Repairing electrical
wiring, W iring: Precautions for repair), repair the connector, otherwise replace the wiring.
Check that the airbag computer, component code 756, is correctly supplied:
–Check and ensure the presence of + after ignition feed between the terminals marked earth connection
code NAP and + after ignition feed connection code AP25.
If the + after ignition feed is absent:
Check the insulation against earth and the continuity of the following connection:
–Connection code AP25 between components 1016 and 756.
Check the continuity of the following connection:
–Connection code NAP between component 756 and the earth NAP.
If the connection or connections are faulty and there is a repair procedure (see Technical Note 6015A, Repairing
electrical wiring, Wiring: Precautions for repair), repair the wiring, otherwise replace it.
AFTER REPAIRWhen communication is established, deal with any faults indicated.
ABGAB9_V04_ALP01
MR-413-X44-88C000$924.mif
MRSZ AIRBAG
Vdiag: 04

88C-67
MR-413-X44-88C000$924.mif
V3
AIRBAGS AND PRETENSIONERS
Fault finding - Fault Finding Chart
MRSZ AIRBAG
Vdiag: 04
88C
ALP 1
CONTINUED
Check that the power supply to the diagnostic socket is correct:
–+ before ignition feed on connection code BP19,
If the + before ignition feed is absent:
Check the insulation against earth and the continuity of the following connection:
–Connection code BP19 between components 225 and 1016.
–Earth on connections NAM and MAM.
If the earth is absent:
Check the continuity of the following connection(s):
–Connection code NAM between component 225 and earth NAM.
–Connection code MAM between component 225 and earth MAM.
If the connection or connections are faulty and there is a repair procedure (see Technical Note 6015A, Repairing
electrical wiring, Wiring: Precautions for repair), repair the wiring, otherwise replace it.
If dialogue has still not been established after these checks, contact the Techline.
AFTER REPAIRWhen communication is established, deal with any faults indicated.