1997 RENAULT KANGOO airbag off

INSTRUMENT PANEL
Dashboard
83
- the loud speaker grilles,
- the dashboard mountings.
Gently pull the dashboard.
Release the wiring retaining clips.
Disconnect:
- the headlight remote adjustment control
connector and hazard warning light connector,
- the remaining connectors (example : decoder
unit).
Remove the dashboard.REFITTING
When refitting, it is important to ensure the va-
rious wires are correctly routed and have suffi-
cient space so that the dashboard can be correctly
centred.
SPECIAL NOTES FOR REFITTING THE STEERING
WHEEL WITH AIRBAG
Ensure the rotary switch under the steering wheel
is correctly positioned.
If there is any doubt that this switch is correctly
centred follow the method for centring described
in section 88 "driver’s airbag".
Renew the steering wheel bolt each time it is re-
moved (pre-bonded bolt) for a steering wheel
with airbag.
Observe the correct tightening torque (4.5
daN.m).
IMPORTANT
Before reconnecting the driver’s airbag cushion,
check to see if the system is operating correctly as
follows:
•check the airbag warning light on the
instrument panel is illuminated when the
ignition is on,
•connect a dummy ignition module to the
driver’s airbag connector and check that the
warning light extinguishes,
•switch the ignition off, connect the airbag
cushion in place of the dummy ignition module
and secure the cushion to the steering wheel,
•switch the ignition on. Check the warning light
illuminates for three seconds when the ignition
is switched on then extinguishes and remains
extinguished.
If the warning light does not operate exactly as
described above, refer to the fault finding section
and test the system using the XRBAG (Elé. 1288)
(see section 88).
12964R
83-5

CONTROLS - SIGNALS
Rotary switch under steering wheel
This makes the electrical connection between the
steering column and the steering wheel.
It consists of a strip of conductor tracks (airbag)
whose length is designed to guarantee 2.5
steering wheel turns (steering lock plus safety
margin) on each side.
REMOVAL - REFITTING
84
- the horn connector, if fitted,
- the steering wheel bolt,
- the steering wheel after setting the wheels
straight,
- the half cowlings (3 bolts).
Disconnect the connector for the rotary switch
and remove it after removing the three mounting
bolts (E).
Before removing the rotary switch its position
must be noted:
- by ensuring that the wheels are straight on re-
moval so that the track may be positioned in
the centre,
- by immobilising the rotary switch rotor using
adhesive tape.
If it is being replaced, the new part is supplied rea-
dy centred by an adhesive label which will tear off
as soon as the steering wheel is turned for the first
time (fit with the wheels straight).
12970R3
Disconnect the battery.
Remove:
- the airbag cushion by the two torx T30 bolts
(tightening torque : 0.5 daN.m) located behind
the steering wheel and disconnect the connec-
tor (D),
IMPORTANT: It is not permitted to operate the
pyrotechnical systems (airbags and pretensioners)
near a source of heat or flame as there is a risk of
triggering.
IMPORTANT : If the steering wheel is removed,
the airbag connector (D)
MUST be disconnected.
The airbag has a connector which short circuits if
it is disconnected to prevent incorrect triggering.
12973R
84-4

CONTROLS - SIGNALS
Rotary switch under steering wheel
Special notes for refitting
Ensure the wheels are still straight.
Ensure the rotary switch under the steering wheel
is still immobilised before refitting.
If there is any doubt follow the method for cen-
tring described in section 88 "driver’s airbag".
Renew the steering wheel bolt each time it is re-
moved (pre-bonded bolt).
Observe the correct tightening torque (4.5
daN.m).
84
IMPORTANT
Before reconnecting the driver’s airbag cushion,
check to see if the system is operating correctly as
follows:
•check the airbag warning light on the
instrument panel is illuminated when the
ignition is on,
•connect a dummy ignition module to the
driver’s airbag connector and check that the
warning light extinguishes,
•switch the ignition off, connect the airbag
cushion in place of the dummy ignition module
and secure the cushion to the steering wheel,
•switch the ignition on. Check the warning light
illuminates for three seconds when the ignition
is switched on then extinguishes and remains
extinguished.
If the warning light does not operate exactly as
described above, refer to the fault finding section
and test the system using the XRBAG (Elé. 1288)
(see section 88).
IMPORTANT: if these instructions are not obser-
ved, the systems may not operate normally and
may be incorrectly triggered.
84-5

DI8816 DI8817
WIRING
Airbags and seat belt pretensioners
88
FUNCTION AND OPERATION OF THE AIRBAGS AND PRETENSIONERS
1) Function
In the event of an accident, the airbag prevents the head striking the steering wheel or dashboard.
It also reduces the maximum acceleration of the head, by absorption.
2) Trigger threshold
Generally speaking, there are four different basic situations.
1) FRONTAL IMPACT AGAINST A OBSTACLE
The trigger speed depends on the obstacle’s
surface. The softer the surface, the higher the
speed.
The pretensioner generally triggers at a lower
speed than the airbag.
2) OFFSET IMPACT AGAINST A OBSTACLE
In this case, the airbag trigger speed depends on
the angle of impact α.
The greater the angle, the higher the vehicle
speed for triggering.
ADirection of travel
BCentre of gravity
88-9

DI8819 DI8818
WIRING
Airbags and seat belt pretensioners
88
3) FRONTAL IMPACT AGAINST A FLEXIBLE
OBSTACLE
The airbag trigger speed depends in this case on
the degree of flexibility of the bodywork of the
vehicle hit.
The more flexible the other vehicle, the higher the
trigger speed (for vehicles of equal flexibility and
100 % contact, the speed is higher than 40 km/h)
(relative speed).
4) OFFSET IMPACT AGAINST A FLEXIBLE
OBSTACLE
Here the airbag trigger speed depends on the an-
gle of impact α and the flexibility of the vehicle hit
in the direction of travel.
The vehicle speed for airbag triggering is greater
when the angle of impact α is greater and the
flexibility of the vehicle hit is high.
5) SUMMARY AND CONCLUSION
- The airbag only reacts to deceleration in the direction of driving. A side impact or the vehicle rolling over
cannot trigger the airbag.
- The vehicle’s projectile energy is transformed into deformation energy of the front part of the vehicle.
Deceleration is greater when the deformation of the vehicle hit is less, meaning that the airbag will trigger
much earlier.
- The minimum speed at which the airbag is triggered is greater when the angle of impact α is large (see
above).
- If, in a frontal impact, there is no deformation at the front pillars, or engine - gearbox - sub-frame impact,
the fact that the airbag was not triggered cannot be considered as a fault since the trigger speed may not
have been reached.
- The pretensioners always trigger at a lower speed than the airbag.
- Experience has shown that the impact speeds given by customers are often not correct. Their reactions are
generally reduced by shock: there is almost always confusion between the cruising speed before the im-
pact and the actual speed of the impact which is thankfully much lower in most cases.
ADirection of travel
BCentre of gravity
CImmobilised vehicle
88-10

WIRING
Airbags and seat belt pretensioners
88
DUMMY AIRBAG IGNITION MODULE
A dummy airbag ignition module housed in a
small red box is supplied in the case containing
the XRBAG test kit.
It has the same electrical characteristics as a real
ignition module and its purpose is to replace the
airbag cushion when it is being checked for faults.
Contact your After Sales Head Office for further
information.
DESTRUCTION UNIT
To avoid all possible risks of an accident the
pyrotechnic gas generators in the airbags and seat
belt pretensioners must be triggered before the
vehicle or the individual part is scrapped.
It is
ESSENTIAL to use the tool Ele. 1287 for this
purpose.
96832R
Refer to the section entitled "Destruction
procedure".
IMPORTANT: Do not trigger pretensioners which
must be returned under warranty for a stalk pro-
blem. This makes analysis by the supplier impossi-
ble.
Return the part in the packaging of the new part.
88-13

WIRING
Airbags and seat belt pretensioners
88
When refitting the computer, it MUST be moun-
ted on the vehicle before its connectors are re-
connected.
The arrow on the computer must point towards
the front of the vehicle.
Vehicle fitted with airbag(s)
Lock the computer using the XR25 and command
G80* (ISO selector on S8 code D49).
When this function is active, all the trigger lines
are inhibited, the airbag warning light on the ins-
trument panel and bargraph 14 LH on the XR25 il-
luminate (new computers are supplied in this
condition).
When refitting the computer:
- Mount it on the vehicle (the arrow on the
computer must point towards the front of the
vehicle).
- Connect the 30 track computer connector and
carry out a check using the XR25.
If everything is correct, unlock the computer using
command G81*.COMPUTER
Several types of unit may be found:
- one computer for pretensioners only.
- one computer for pretensioners and airbag(s).
Depending on function, these computers have:
- an electromagnetic safety sensor,
- a decelerometer for the airbags
- an ignition circuit for the different pyrote-
chnic systems,
- a power reserve,
- a diagnostic and detected fault storage circuit
(except pretensioner only),
- a control circuit for the warning light on the
instrument panel (except pretensioner only),
- a K - L communication interface via the dia-
gnostic socket (except pretensioner only).
IMPORTANT
Before removing the computer:
Vehicle with pretensioners only (no air-bag) :
- Switch off the ignition.
- Remove the feed fuse (see fuse allocation) and
wait for 5 minutes for the reserve capacity to
discharge.
- Disconnect the computer connector to avoid
any risk of triggering.
- Ensure no-one is in the passenger compartment
during the complete operation on the compu-
ter.
88-14

WIRING
Airbags and seat belt pretensioners
88
PRD99529
If it is being replaced, the new part is supplied rea-
dy centred by an adhesive label which will tear off
as soon as the steering wheel is turned for the first
time (fit with the wheels straight).
REFITTING
Ensure the wheels are still straight.
Ensure the rotary switch under the steering wheel
is still immobilised before refitting.
If this is not the case, follow the centring method
described below:
- rotate the upper section of the rotary switch
anti-clockwise. The approach to the extreme
position, shown below, is indicated by a cer-
tain stiffness (do not force).
SPECIAL NOTES FOR THE ROTARY SWITCH
UNDERNEATH THE STEERING WHEEL
This makes the electrical connection between the
steering column and the steering wheel.
It consists of a strip of conductor tracks (airbag)
whose length is designed to guarantee 2.5 stee-
ring wheel turns (steering lock plus safety margin)
on each side.
REMOVAL
Before removing the rotary switch its position
must be noted:
• by ensuring that the wheels are straight on re-
moval so that the track may be positioned in
the centre,
• by immobilising the rotary switch rotor using
adhesive tape.
- then lightly rotate the upper section of the part
clockwise and check that the rotary switch is ac-
tually in the position shown below.
12970R4
88-22