Page 3 of 40
88C-3V1 MR-376-X76-88C000$010.mif
AIRBAGS AND PRETENSIONERS
Fault finding – Introduction88C
2nd generation
(AC4 phase II)
Special tooling required:
4. REMINDERS
During operations on the airbag/seat belt pretensioner systems it is vital that you lock the computer using the
diagnostic tool to prevent any risk of accidental triggering (all the trigger lines will be inhibited). The locked mode is
indicated when the instrument panel warning light comes on. Without the diagnostic tool, switch off the ignition and
remove the supply fuse from the system, then wait at least 2 seconds for the power reserve capacity to discharge.
Never measure the airbag or pretensioner trigger lines with any device other than the XRBAG or by the "Airbag and
pretensioner wiring harness check" function on the CLIP and NXR tools.
Before using a dummy ignition module, check that its resistance is between 1.8 and 2.5 ohms.
Ensure during the operation that the supply voltage to the computer does not drop below 10 volts.Special tooling required
Diagnostic tools (except XR25)
Adapter and bornier kit to be used for the "Airbag and
pretensioner wiring harness check" function of the CLIP and
NXR tools or the XRBAG unit.
Multimeter
Page 5 of 40
88C-5V1 MR-376-X76-88C000$010.mif
AIRBAGS AND PRETENSIONERS
Fault finding – Introduction88C
2nd generation
(AC4 phase II)
5. FAULT FINDING PROCEDURE
Check the battery charge
and the condition of the fuses
Print the system fault finding log
(available on CLIP)
Connect CLIP
See ALP no. 1
Read the faults
Deal with present faults
Deal with stored faults
Conformity check
Use fault finding charts (ALPs)
Dialogue with
computer?
Faults
present
The cause is
still present
The cause is
still presentThe cause is
still present
Contact the Techline with the
completed fault finding log
no
nono
no no
yes
yes
yes
Fault
solvedFault solved Fault solved
Page 39 of 40
88C-39
AFTER REPAIRWhen communication is established, deal with any faults indicated.
V1 MR-376-X76-88C000$120.mif
88C
2nd generation
(AC4 phase II)
ALP1 No dialogue with the airbag computer
NOTESUse Wiring Diagrams Technical Note for Kangoo VLL.
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 of the fault and if the dialogue cannot be established with any other computer of the same
vehicle, it may be that a faulty computer is disrupting diagnostic lines HK and HL.
Use a process of successive disconnections to locate this computer.
Check the battery voltage and carry out the necessary operations to obtain a correct voltage (10.5 volts < battery
voltage < 16 volts).
Check the presence and condition of the airbag computer supply fuse.
Check that the computer connector is connected correctly and check the condition of its connections.
Check that the supply to the computer is correct:
– Disconnect the airbag computer and fit the B40 30-track adapter.
– Check and ensure the presence of + after ignition between the terminals marked earth and + after ignition.
AIRBAGS AND PRETENSIONERS
Fault finding – Fault Finding Chart
