AIRBAG - SEAT BELT PRETENSIONERS
Fault finding - Fault Interpretation
88C - 63
88C
V3 MR-372-J84-88C000$072.mif
AIRBAG ACU4
Vdiag: 04
DF240
CONTINUED
CC.1 - CC.0
NOTESNone.
Lock the computer.
Check the connections of the 22-track connector under the seat. Repair if necessary. Attach the 22-track
(Elé. 1687) test adapter under the seat (point C1).
The CLIP or XRBAG tool absolutely must be used to measure the proper insulation for the type of fault in
cable B.
Is the value obtained correct?
NO
YES
Seat wiring fault.
Replace the wiring between pointsC1 and C3.
Wiring fault between the computer and driver's seat (C0/C1).
Replace the wiring if necessary.
AFTER REPAIRReconnect the computer and the driver's seat-cushion airbag/lap belt ignition module,
then switch the ignition back on. Clear 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. When replacing the airbag module, do not forget to reconnect the earth
on the new one.
Destroy the seat airbag module or driver's seat lap belt pretensioner if it has been
replaced (tool Elé. 1287).
ACU4 Vdiag04 J84 1.0
AIRBAG - SEAT BELT PRETENSIONERS
Fault finding - Fault Interpretation
88C - 64
88C
V3 MR-372-J84-88C000$072.mif
AIRBAG ACU4
Vdiag: 04
DF241
PRESENT
PASSENGER'S SEAT-CUSHION AIRBAG / LAP BELT CIRCUIT
CC : Short circuit
CO : Open circuit
CC.1 : Short circuit to + 12 V
CC.0 : Short circuit to earth
1.DEF : Configuration
NOTESIf 1.DEF, check and adjust the computer configuration.
Priorities when dealing with multiple faults: If DF241 is present with at least one of
DF068, DF210 or DF232, begin the fault finding by checking the 22-track under-seat
connector.
Special notes: depending on the type of vehicle body, this is either a lap belt
pretensioner circuit fault or seat-cushion airbag (anti-skid airbag) fault.
Never do measuring on the trigger lines with any tool other than CLIP or XRBAG.
Use the 64-track (Elé. 1717) adapter for working on the computer connector and the
22-track (Elé. 1687) adapter for working on the seat.
CO - CC
NOTESSpecial notes: correct the trigger line configuration if the
vehicle is not fitted with a passenger seat-cushion airbag /
lap belt.
Lock the computer, disconnect the computer connector and attach 64-track adapter (Elé. 1717). The CLIP or
XRBAG tool absolutely must be used to measure the resistance in the adapter cable marked D.
If the value obtained is correct, check the connections of the 64-track (tracks 39 and 40) connector.
Check the connections of the 22-track connector under the seat. Repair if necessary. Attach the 22-track
(Elé. 1687) test adapter under the seat (point C1).
The CLIP or XRBAG tool absolutely must be used to measure the resistance in cable B.
Is the value obtained correct?
NO
YES
Check the seat connector connections (tracks 9 and 10).
Make sure the passenger seat-cushion airbag/lap belt ignition module is properly connected.
Disconnect the passenger seat-cushion airbag/lap belt ignition module, connect a dummy
ignition module to the ignition module connector, then again measure the resistance in
cable B.
– If the value indicated is correct, replace the passenger seat-cushion airbag/lap belt module.
– If the value obtained is still not correct, replace the wiring between points C1 and C3 (seat
wiring).
Again check the connections of the seat connector (tracks 9 and 10) and of the 64-track
(tracks 39 and 40) connector.
If the fault persists, the wiring is faulty between the computer and the passenger seat (C0/C1).
Replace the wiring if necessary.
AFTER REPAIRReconnect the computer and the passenger seat-cushion airbag/lap belt ignition
module, then switch the ignition back on. Clear 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. When replacing the airbag module, do not forget to reconnect the earth
on the new one.
Destroy the seat airbag module or driver's seat lap belt pretensioner if it has been
replaced (tool Elé. 1287).
ACU4 Vdiag04 J84 1.0
AIRBAG - SEAT BELT PRETENSIONERS
Fault finding - Fault Interpretation
88C - 65
88C
V3 MR-372-J84-88C000$072.mif
AIRBAG ACU4
Vdiag: 04
DF241
CONTINUED
CC.1 - CC.0
NOTESNone.
Lock the computer.
Check the connections of the 22-track connector under the seat. Repair if necessary. Attach the 22-track
(Elé. 1687) test adapter under the seat (point C1).
The CLIP or XRBAG tool absolutely must be used to measure the proper insulation for the type of fault in
cable B.
Is the value obtained correct?
NO
YES
Seat wiring fault.
Replace the wiring between pointsC1 and C3.
Wiring fault between the computer and passenger's seat (C0/C1).
Replace the wiring if necessary.
AFTER REPAIRReconnect the computer and the passenger seat-cushion airbag/lap belt ignition
module, then switch the ignition back on. Clear 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. When replacing the airbag module, do not forget to reconnect the earth
on the new one.
Destroy the seat airbag module or driver's seat lap belt pretensioner if it has been
replaced (tool Elé. 1287).
ACU4 Vdiag04 J84 1.0
