88C-5
MR-372-J84-88C100$059.mif
V5
AIRBAG RC5
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
88C-6
MR-372-J84-88C100$059.mif
V5
AIRBAG RC5
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.
88C-88
MR-372-J84-88C100$885.mif
V5
88C
AIRBAGS AND PRETENSIONERS
Fault finding – Fault Finding Chart
ALP 1 No communication with the airbag computer
NOTESSpecial note:
See Introduction/Procedure section to activate the forced + after ignition feed to
run fault finding on a computer.
Try to establish dialogue with a computer on another vehicle to check that the diagnostic tool is not faulty.
If the diagnostic 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 computer at fault.
check the battery voltage and carry out the operations required to obtain a correct voltage.
(10.5V < U battery < 16V)
Check the presence and condition of the airbag computer supply fuse.
Check that the computer connector is properly connected and check the condition of its connections.
Check that the supply to the computer is correct:
– Disconnect the airbag computer and fit the 22-track adapter Elé. 1685.
– Check and ensure the presence of + after ignition feed between the terminals marked earth and + after ignition
feed.
Check that the power supply to the diagnostic socket is correct:
–+ Before ignition on track 16.
– + after ignition en track 1.
–Earth on tracks 4 and 5.
Check using the 22-track adapter Elé. 1685. Check the continuity and insulation of the lines of the airbag
computer/diagnostic socket connection between:
Bornier track CAN H
Bornier track CAN LTrack 6 of the diagnostic socket
Track 14 of the diagnostic socket
If dialogue has still not been established after these checks, contact Techline.
AFTER REPAIRWhen communication is established, deal with any faults indicated.
ABGRC5_V14_ALP01
AIRBAG RC5
Vdiag: 14
