88C-56
MR-413-X44-88C000$616.mif
V3
AIRBAGS AND PRETENSIONERS
Fault finding - Interpretation of faults
MRSZ AIRBAG
Vdiag: 04
88C
DF232
PRESENT
DRIVER'S SEAT BELT BUCKLE SENSOR CIRCUIT
CC.1 : Short circuit to + 12 V
1.DEF: Short circuit
NOTESIf 1.DEF, check and modify the computer configuration using the configuration reading
LC073 Driver's seat belt buckle sensor, then adjust it if it is inconsistent using
configuration CF273 Driver's seat belt buckle sensor.
Priorities when dealing with a number of faults:
If DF232 is present with faults DF077 Driver's front side chest-level airbag circuit
and DF183 Driver's front buckle pretensioner circuit, start fault finding by checking
the 8-track R335 connector under the driver's seat.
Use the W iring Diagrams Technical Note, New TWINGO.
Check the condition of the driver's seat belt buckle sensor connector component code 333 (see Wiring Diagram
Technical Note, New Twingo, Component code 333).
Check the condition of the airbag computer connector component code 756 (see Wiring Diagram Technical
Note, New Twingo, Component code 756).
If the connector is faulty and if there is a repair method (see Technical Note 6015A, Repairing electrical wiring,
Wiring: Precautions for repair), repair the connector, otherwise replace the wiring.
Use the "Universal bornier" to check the insulation to + 12 V, to earth and between the 2 lines of the following
connections:
–Connection code 60DU between components 756 and 333,
–Connection code 60DV between components 756 and 333.
If there is a repair method (see Technical Note 6015A, Repairing electrical wiring, Wiring: Precautions for
repair), repair the wiring, otherwise replace it.
Use the "universal bornier" to check the continuity of the following connections:
–Connection code 60DU between components 756 and 333,
–Connection code 60DV between components 756 and 333.
If there is a repair method (see Technical Note 6015A, Repairing electrical wiring, Wiring: Precautions for
repair), repair the wiring, otherwise replace it.
If the fault is still present, replace the driver's seat belt buckle sensor (see MR 411, Mechanical, 88C, Airbag and
pretensioners, Front buckle pretensioner: Removal - Refitting).
AFTER REPAIRReconnect the computer and front seat belt inertia reels, then switch on the ignition
again.
Clear the computer fault memory using command RZ001 "Fault memory". Switch
the ignition of f and then on again.
Repeat a check using the diagnostic tool and, if there are no faults (do not take the
DF034 "Computer locked'' into account), unlock the computer using the command
VP007 ''Unlock computer''.
ABGMRSZ_V04_DF232P
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
