Dacia Solenza (engine E7J). Manual - part 168

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Airbag - General

IMPORTANT!
All intervention on the airbag system

may be performed only by qualified staff.

The Dacia SOLENZA vehicles are

equipped with a passive security system
composed of:

- a driver frontal airbag with an inflatable

bag,

- UCE airbag mounted in the central

console tunnel.

In case of  a front  impact strong enough,

theUCE airbag  is releasing the airbag, which
is inflating in the steering wheel central part,
protecting in  this way  the driver’s face.

The airbag is not reacting at decelerations

in the driving direction. A side impact or a
rollover may not lead to the airbag releasing.

The vehicle projection energy  is

transformed into distortion energy of the
vehicle front part. The higher deceleration is,
the smaller vehicle distortion is, and the airbag
is quicker releasing.

The minimal speed at which the airbag is

releasing is increasing, as the impact angle
between the  vehicles is higher.

If in case of a frontal impact there are no

distortions in front of the front pedals support or
engine-frame impact, non-releasing of the airbag
is not to be considered an operation incident,
the releasing speed not being reached.

By experience, the speedometer is not

showing correctly the impact  speed, this being,
generally, smaller than the cruising speed had
before the impact.

A vehicle equipped with driver airbag is to be

identified by the marking “Airbag” from the
steering wheel pillow and a sticker placed on the
windscreen left side.

ATTENTION !
Because the UCE airbag, steering wheel

airbag and the shock sensor are containing
sensitive  components, these are to be shock-
proofed during their handling.

At every windscreen replacement, the sticker

mentioning that vehicle is equipped with airbag
is to be placed on the windscreen.

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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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- select mode “Control”.
-select function “Actuators”, then

validate “Computer blocking”

- select menu  “State list” and ensure

that UCE airbag has been blocked.

The state “Blocked  computer”  is

becoming ACTIVE.

When this function is activated, all releasing

lines are  inhibited, the airbag  indicator from
instrument panel is lighted (new UCE airbag
are delivered with blocked releasing lines).

Wait 2 seconds until releasing UCE airbag

lines are  inhibited.

ATTENTION!
In case of an intervention on the

vehicle (on exhaust, carriage body, etc),
block the UCE airbag by means of the
CLIP tester, wait for 2 seconds after
setting the contact off (necessary time for
automatic discharge of the  UCE airbag),
then you  may  use hammers or shock
generating device on central floor.

After sale, any electric accessory

(speakers, anti-theft system or any device
which may be generating magnetic field,

is not to be mounted near UCE airbag.

UCE AIRBAG DISMOUNTING

Set the contact off. Disconnect the battery

(-) terminal.

Dismount the central console.
Dismount the UCE airbag connector.
Dismount the UCE airbag attachment screws

(1).

UCE AIRBAG REMOUNTING

Attach UCE airbag on the vehicle, the arrow

from the UCE airbag being oriented towards the
vehicle front (required  tightening  moment 0.8 ±
0.2 daNm).

Reconnect the UCE airbag  connector.
Mount the central console. Connect the

battery (-) terminal.

Set the contact on.
Check the system operation by means of the

CLIP tester and set the system according to the
vehicle equipping level “With driver’s airbag”.
If everything is correct, unblock UCE airbag. If

Airbag – Electronic control unit

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it is not correct, see chapter “Diagnostic”.

AIRBAG SYSTEM CONFIGURATION

Because the vehicle is equipped only the

driver’s airbag, it is necessary the UCE airbag
configuration 

only “with driver’s airbag”.

In case UCE airbag configuration does not

match with the vehicle equipping, the airbag
indicator will remain lighted.

-

Select menu “  Diagnostic”

-

Select and validate vehicle type.

-

Select and validate diagnostic system

“Airbag/ Pre-tensioning systems”

-

Select mode “Control”.

-

Select function “Programming” then

configure the computer only “With driver’s
airbag”.

-

Set the contact off then reset the contact

on for in order to validate the configuration.
In the case of the UCE airbag configuration, the
airbag indicator from the instrument panel is
remaining lighted because new UCE  airbag  are
delivered in blocked state.

-

Select mode “Control”, select mode “

Configurations reading”  or select menu
“States list” and ensure that  modification has
been taken into consideration.

ATTENTION!
Non-observing of these prescriptions may

generate an abnormal operation of the
system, even undesirable releasing of the
airbag.

UCE airbag may accept up to maximum

4 airbag releasing (certain elements are
loosing their nominal characteristics). It is
not necessary the systematic replacement

after each airbag releasing.

UCE AIRBAG UNBLOCKING

 After replacing UCE airbag it is necessary
the releasing lines unblocking. The same
method as for the UCE airbag blocking is to
be used, by validation control “Computer
unblocking”. The airbag indicator from the
instrument panel is getting off.

REMARK:
The 30 pins connector of the UCE

airbag has a shunt circuit that is short-
circuiting the different transmitting
lines of the releasing signal when this
one is  disconn ected, avoiding the
undesirable releasing of this system (by
antenna effect, for instance)

REMARK:
UCE airbag supply and  the

pyrotechnic gas generator is performed
by means of the vehicle battery. UCE
airbag is disposing of a reserve electric
energy enabling nevertheless the airbag
releasing even if, at the beginning of a
shock, the vehicle battery is not anymore
supplying the UCE airbag.

Airbag – Electronic control unit