Dacia Solenza 2004, Repair Manual

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88
WIRING
88 - 2
AIRBAG OPERATION
When setting the contact on, the airbag system
control indicator from the instrument panel is
lighted for 3 seconds then it is off.
UCE airbag is entering in a lookout state and
is considering the vehicle decelerations due to a
signal measured by an integrated electronic
decelerometer.
In case of a stronger frontal impact, the
security electromechanical captor is tripping the
igniter of the pyrotechnic gas generator, which is
inflating the driver’s airbag.
The airbag system is not releasing in case of a
side impact or a rear impact.
When started, the pyrotechnic gas generator
is generating a detonation and some smoke.
IMPORTANT!
This system must be checked by means of the
CLIP tester, immediately when:
- an accident did not caused the
movement,
- the vehicle was stolen or a stilling tentative
has been produced.
- before selling a second hand vehicle.
AIRBAG INDICATOR FROM
INSTRUMENT PANEL
This indicator is showing the operation state of
the driver’s airbag.
It is lighted for 3 seconds from contact setting
on, and then it is getting off and it staying like this.
If it is not on when setting the contact on or it is
on during vehicle driving, this is indicating a failure
in the system (see chapter “Diagnostic”).
After driver’s airbag releasing, the airbag
indicator from the instrument panel is on and UCE
airbag is automatically blocking the driver’s airbag
releasing line, memorizing the releasing.
That is why, after an impact generating the
airbag releasing, it is necessary the UCE
airbag unblocking, then the computer blocking
in order to block all releasing.
The erasing of the memorized failures it is
possible only after data reading from
“Im-
pact context”
, then the shock sensor con-
tact is restored and the control “Computer
unblocking”
may be performed.
UCE AIRBAG
DISMOUNTING – REMOUNTING
UCE airbag is mounted on the tunnel in
front of the gearbox lever.
UCE air bag is provided with:
- a security electromechanical captor,
- a decelerometer for airbag
- an ignition circuit of the pyrotechnic
system
-an electric energy reserve,
- a diagnostic and memorizing circuit
of the detected failures,
- a control circuit of the alert indicator
from instrument panel.
- A K-L communication interface with
the diagnostic socket.
UCE AIRBAG BLOCKING
Connect the CLIP tester to the vehicle,
the contact being set off.
Set the contact on.
Block the UCE airbag:
- select the menu “
Diagnostic
”
- select and validate the vehicle type.
- select and validate the diagnostic
system “
Airbag / Pre-tensioning systems
”.
Airbag – Electronic control unit
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