steering LAND ROVER DISCOVERY 1995 Workshop Manual

SUPPLEMENTARY RESTRAINT SYSTEM
1
REPAIR SYSTEM PRECAUTIONS
CAUTION: Before and during any removal
operations within the SRS section, note
routing and position of all harnesses to aid
correct refitting and to avoid accidentally trapping
cables.
CAUTION: During refitting of any item
within the SRS section, always ensure
connectors are fully engaged and latched
before proceeding to the next stage of the
operation.DRIVER'S AIRBAG MODULE
Service repair no - 76.74.01
WARNING: All the airbag system
components, including the wiring harness,
MUST be renewed after the airbags have
deployed.
Remove
1.Turn steering wheel 90Ê from horizontal.
2.Switch off ignition.
3.Disconnect battery negative '-' and then the
positive '+' lead.
CAUTION: Always disconnect both leads.
4.Release 2 turnbuckles and remove dash lower
panel.

75SUPPLEMENTARY RESTRAINT SYSTEM
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REPAIR
5.Disconnect airbag harness connector from
yellow airbag column harness.6.Use special socket, unscrew 2 tamper-proof
Resistorx screws securing airbag module to
steering wheel.
7.Release airbag module from steering wheel.
CAUTION: Do not allow the airbag module
to hang by the airbag harness.

SUPPLEMENTARY RESTRAINT SYSTEM
3
REPAIR
8.Disconnect harness connector from airbag
module.
9.Remove airbag module.
CAUTION: Store the airbag module in
accordance with the storage procedures
outlined in Description and Operation.
NOTE: If airbag module is to be replaced
the serial numbers must be recorded in
the vehicle service record.
Refit
10.Reverse removal procedure.
11.Connect harness connector to airbag module
with harness downwards (as shown at 8).
12.Position airbag module on steering wheel and
engage retained screws. Use special socket to
tighten screws to
8Nm (6 lbf ft).
CAUTION: Take care not to cross thread
screws.
13.Check Supplementary Restraint System using
Testbook.STEERING WHEEL
Service repair no - 57.60.01
Remove
1.Remove driver's airbag module.
See driver's
airbag module.
2.Position steering wheel so the road wheels are
in the straight ahead position.
3.Disconnect cruise control switch connector
(where fitted) from rotary coupler harness.
4.Release harnesses from clip on steering wheel.
5.Remove steering wheel nut.
6.Release steering wheel from column.
7.Feed harnesses through hole in steering wheel.
8.Remove steering wheel.
CAUTION: Prevent rotation of rotary
coupler once steering wheel is removed.
Secure in position with adhesive tape.

75SUPPLEMENTARY RESTRAINT SYSTEM
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REPAIR Refit
9.Reverse removal procedure.
CAUTION: Ensure road wheels are straight
ahead before fitting steering wheel.
10.Fit steering wheel ensuring the rotary coupler
lugs are correctly engaged.
11.Fit steering wheel nut. Tighten to
50 Nm (37 lbf
ft).
12.Refit driver's airbag module.See driver's
airbag module.
ROTARY COUPLER
Service repair no - 76.74.07
CAUTION: Ensure wheels are straight
ahead before removal and refitting. Store
in plastic bag. DO NOT rotate mechanism
whilst removing.
Remove
1.Remove driver's airbag module.
See driver's
airbag module.
2.Remove steering wheel.See steering wheel.
3.Release lever and lower steering column.
4.Release 2 turnbuckles and remove lower dash
panel.

SUPPLEMENTARY RESTRAINT SYSTEM
5
REPAIR
5.Remove 3 screws securing lower half of nacelle
to steering column.
6.Separate the 2 halves of the nacelle and remove
from steering column.
7.Release airbag harness connector from bracket
and disconnect.
8.Disconnect rotary coupler connector from
steering column harness.
9.Release 2 clips securing rotary coupler to
column switch assembly.
10.Remove rotary coupler from column switch
assembly.

75SUPPLEMENTARY RESTRAINT SYSTEM
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REPAIR
11.If rotary coupler is being re-used, place a piece
of adhesive tape around moulding in positionA
to prevent rotation.
Refit
12.Reverse removal procedure.
CAUTION: Ensure indicator cancellation
pegs correctly engage into back of
steering wheel.13.Align direction indicator cancellation bush. If
original rotary coupler is being fitted remove
adhesive tape and then fit rotary coupler to
column switch assembly.
NOTE: If original rotary coupler is to be
fitted and there is evidence of tampering, it
is imperative that the coupler is
centralised.
See rotary coupler centralise.
14.If a new rotary coupler is being fitted and the
sealing tape at positionBis broken it MUST
NOT be used.
15.Refit steering wheel.
See steering wheel.
16.Turn steering wheel to both LH and RH lock 5
times. If adverse noises can be heard, check
alignment of indicator cancellation pegs.
17.Refit driver's airbag module.
See driver's
airbag module.

SUPPLEMENTARY RESTRAINT SYSTEM
7
REPAIR ROTARY COUPLER CENTRALISE
Fitting a rotary coupler which has not been centralised
could result in tape breakage. If the tape is broken, a
new rotary coupler must be fitted.
Providing the removal procedure has been correctly
followed this operation should not be necessary. If
however there is evidence of tampering, it is
imperative that the coupler is centralised.
CAUTION: Ensure wheels are positioned
straight ahead before fitting the rotary
coupler.
1.Correctly fit rotary coupler to column switch
assembly but do not fit steering wheel or make
any electrical connections.
See rotary coupler.
2.Depress rotary coupler locking peg and without
using undue force, rotate coupler anti-clockwise
as far as inner tape will allow. Releasing peg will
lock coupler in its current position.
NOTE: Do not apply excessive force when
limit is reached as this may result in tape
breakage. If no limit can be found, tape
has already broken and rotary coupler must be
replaced.
3.Having turned rotary coupler fully anti-clockwise
to limit position, proceed to turn coupler 2.5 turns
clockwise to obtain central position. (Coupler will
normally rotate a full five turns from
anti-clockwise limit to clockwise limit).
4.Make necessary electrical connections and refit
steering wheel.
See steering wheel.
5.Refit driver's airbag module.See driver's
airbag module.
COLUMN SWITCH ASSEMBLY
Service repair no - Indicator/lighting - 86.65.55
Service repair no - Wash/wipe - 84.15.34
Remove
1.Remove steering wheel.
See steering wheel.
2.Release 2 turnbuckles and remove lower dash
panel.

75SUPPLEMENTARY RESTRAINT SYSTEM
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REPAIR
3.Remove 3 screws securing lower half of nacelle
to steering column.
4.Separate the halves of the nacelle and remove
from steering column.
5.Release 2 clips securing rotary coupler to
column switch assembly.
6.Release rotary coupler.
CAUTION: Do not allow rotary coupler to
hang on its harness.
7.Disconnect 4 connectors from column switch
assembly.
8.Remove column switch assembly from steering
column.
Refit
9.Reverse removal procedure.

75SUPPLEMENTARY RESTRAINT SYSTEM
10
REPAIR CRASH SENSOR - DISTRIBUTED SRS
Service repair no - 76.74.04
Remove
1.Disconnect battery negative lead.
2. LH sensor only:Slacken power steering
reservoir clamp and lift reservoir to provide
access.
Diesel model only:Remove jack and mounting
bracket.
3.Disconnect multiplug from sensor
CAUTION: Ensure airbag harness
connector seal and anti-backout DO NOT
come adrift when disconnecting sensor.
4.Use special socket, remove 2 screws securing
crash sensor to body.
5.Remove crash sensor.Refit
6.Reverse removal procedure.
7.Tighten crash sensor securing screws to
10 Nm
(7 lbf ft).
Ensure multiplug is fully engaged on
sensor and retained by its latch.
8.Check Supplementary Restraint System using
Testbook.

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REPAIR AIRBAG HARNESS
Service repair no - 86.70.63
Remove
1.Remove driver's airbag.
See driver's airbag
module.
2.Remove passenger's airbag.See passenger's
airbag module.
3.Remove dash panel assembly.See CHASSIS
AND BODY, Repair, dash panel assembly
4.Remove heater blower unit.See HEATING
AND VENTILATION, Repair, blower motor
unit - heater and air conditioning.
5.Remove heater and cooler unit.See AIR
CONDITIONING, Repair, heater and cooler
unit
Pre 97 MY
6.Remove 3 screws securing expansion tank and
position expansion tank aside.
7.Disconnect multiplug from each crash sensor.
8.Release airbag harness from clips and ties along
the bulkhead and each valance.
9.Displace airbag harness grommet to inside of
bulkhead and feed harness through bulkhead.
All Models
10.Disconnect multiplug from airbag control unit.
11.Release airbag harness from under carpet.
12.Release ties securing harness along toeboard.
13.Disconnect steering wheel airbag multiplug.
14.Release airbag harness from driver's side and
remove.
Refit
15.Reverse removal procedure.
CAUTION: Ensure harness is correctly
routed in harness protector and that all
securing clips and ties are correctly
engaged and harness is undamaged. Ensure all
connections are fully engaged and retained by
their latches.