buttons LAND ROVER DISCOVERY 1995 Workshop Manual

SUPPLEMENTARY RESTRAINT SYSTEM
15
REPAIR AIRBAG MANUAL DEPLOYMENT
CAUTION: Deployment in the vehicle will
damage the steering wheel; if the vehicle
is not being scrapped deploy the module
away from the vehicle in accordance with the
separate procedure.
If a vehicle is to be scrapped and contains an
undeployed airbag module, the module must be
manually deployed. This operation should only be
carried out using the following recommended manual
deployment procedure.
Before deployment is started the deployment tool self
test procedure should be carried out.
Deployment tool SMD 4082/1 self test procedure
1.Insert BLUE and YELLOW connectors of tool
lead into corresponding sockets on face of tool.
2.Connect crocodile clips of second tool lead to
battery, RED to positive and BLACK to negative.
3.RED "READY" light should illuminate.
4.Press and hold both operating buttons.5.GREEN "DEFECTIVE" light should illuminate.
6.Release both operating buttons.
7.RED "READY" light should illuminate.
8.Disconnect tool from battery.
9.Disconnect blue and yellow connectors from tool
face sockets.
10.Self test now complete.
Deployment with module fitted to vehicle
These guidelines are written to aid authorised
personnel to carry out the safe disposal of the airbag
module when fitted to the vehicle.
WARNING: Only use the LAND ROVER
approved deployment equipment. Deploy
airbag module in a well ventilated
designated area. Ensure airbag module is not
damaged or ruptured before deploying.
1.Carry out deployment tool self test.
2.Release 2 turnbuckles securing lower panel to
dash, remove lower panel.

SUPPLEMENTARY RESTRAINT SYSTEM
17
REPAIR
9.Press both operating buttons to deploy airbag
module.
10. DO NOTreturn to airbag module for 30 minutes.
11.Using gloves and face mask, remove airbag
module from steering wheel, place airbag
module in plastic bag and seal bag.
12.Transport deployed airbag module to designated
area for incineration.
NOTE: DO NOT transport airbag module in
the vehicle passenger compartment.
13.Scrap all remaining parts of airbag system.
DO NOTre-use or salvage any parts of the
airbag system including steering wheel.Deployment with module removed from vehicle.
Driver's Airbag Module
These guidelines are written to aid authorised
personnel to carry out the safe disposal of airbag
modules when removed from the vehicle.
WARNING: Only use the LAND ROVER
approved deployment equipment.
Deploy airbag modules in a well ventilated
designated area.
Ensure airbag module is not damaged or ruptured
before deploying.
1.Carry out deployment tool self test.
2.Remove airbag module from steering wheel.
See driver's airbag module.
3.Position toolSMD 4082/2in vice, ensuring that
vice jaws grip tool above bottom flange to
prevent possibility of tool being forced upwards
from vice. Tighten vice.

SUPPLEMENTARY RESTRAINT SYSTEM
19
REPAIR
9.Press both operating buttons to deploy airbag
module.
10. DO NOTreturn to airbag module for 30 minutes.
11.Using gloves and face mask, remove airbag
module from tool, place airbag module in plastic
bag and seal bag.
12.Wipe down tool with damp cloth.
13.Transport deployed airbag module to designated
area for incineration.
NOTE: DO NOT transport airbag module in
the vehicle passenger compartment. DO
NOT re-use or salvage any parts of the
airbag system including steering wheel or
steering column.Passenger's Airbag Module
1.Carry out deployment tool self test.
2.Remove airbag module from fascia.
See
passenger's airbag module.
3.Position toolSMD 4082/6in vice, ensuring that
vice jaws grip tool above bottom flange to
prevent possibility of tool being forced upwards
from vice. Tighten vice.
4.Position bracketsSMD 4082/7to tool; lightly
tighten bolts.

SUPPLEMENTARY RESTRAINT SYSTEM
21
REPAIR
10.Press both operating buttons to deploy airbag
module.
11. DO NOTreturn to airbag module for 30 minutes.
12.Using gloves and face mask, remove airbag
module from tool, place airbag module in plastic
bag and seal bag.
13.Wipe down tool with damp cloth.
14.Transport deployed airbag module to designated
area for incineration.
NOTE: DO NOT transport airbag module in
the vehicle passenger compartment. DO
NOT re-use or salvage any parts of the
airbag system.AIRBAG DIAGNOSTIC CONTROL UNIT - SPS SRS
Service repair no - 76.74.03
Remove
1.Remove centre console.
See CHASSIS AND
BODY, Repair, centre console.
2.Disconnect connector from control unit.
3.Remove 2 Torx bolts securing control unit to
body.
4.Remove control unit.
Refit
5.Position control unit to body, fit Torx bolts and
tighten to
10 Nm (7 lbf ft).
6.Connect control unit connector and secure.
7.Fit centre console.
See CHASSIS AND BODY,
Repair, centre console.
8.Check supplementary restraint system using
TestBook.

CHASSIS AND BODY
1
REPAIR FRONT DOOR
Service repair no - 76.28.01
Remove
1.Disconnect battery negative lead.
2.Detach the door seal at the lower section of the
'A' post.
3.Carefully remove the two retaining buttons from
the trim panel on the side of the footwell and
ease out the panel.
4.Disconnect the three multiplugs connecting the
door harness and speaker leads.
5.Detach the convoluted grommet from the 'A' post
and withdraw the door harness and speaker
leads.
6.Set the door in the open position without
engaging the check stay; then remove the roll
pin securing the check stay at the 'A' post.
WARNING: Instruction 7 MUST BE carried
out with assistance.
7.Remove the door hinge 'C' clips from the hinge
posts and with assistance carefully lift the door
from the vehicle.
Refit
8.Refit the door and secure the hinge posts with
the 'C' clips.
9.Locate the check stay to the bracket on the 'A'
post and secure with a new roll pin.
10.Feed the door harness and speaker leads
through the aperture in the 'A' post, fully open
the door and reconnect the multiplugs in the
footwell, take up the slack and refit the
convoluted grommet to the 'A' post.
11.Refit the footwell side panel.
12.Check the location of the door and the operation
of the door lock. If necessary, adjust the door
and striker.
13.The door can be adjusted up and down or in and
out of the opening by loosening the six screws
securing the hinges to the door, and by the
addition or removal of shims between the hinge
and door.
14.The door lock striker can be adjusted by
loosening the striker and moving it in the
appropriate direction or by adding and removing
spacing washers between the striker and 'B'
post.

ELECTRICAL
5
DESCRIPTION AND OPERATION ANTI THEFT ALARM SYSTEM
The main function of the system is to offer easy to use
remote locking and unlocking of the vehicle without
having to actively select the alarm function.
ALARM COMPONENTS
COMPONENT LOCATION
1. Electronic control unit (ECU) and relays Passenger footwell.................
2. Bonnet switch RH engine bay..........................................................
3. Door switches
4. Alarm sounder RH engine bay.........................................................
5. Light emitting diode (LED) Dash panel.......................................
6. Ultrasonic unit Roof map pocket.........................................................
7. Lock barrel, sill buttons
8. Handset transmitter
9. Aerial 'A' post, passenger side........................................................................

86ELECTRICAL
6
DESCRIPTION AND OPERATION ALARM COMPONENT LOCATIONS (96 MODELS)
COMPONENT LOCATION
1. Electronic control unit (ECU) and relays Under dash (passenger side).................
2. Anti-theft alarm indicator light Instrument panel..................................
3. Engine immobilisation warning light (EIWL) * Instrument panel..........
4. Passive coil Over starter switch barrel.............................................................
5. Bonnet switch RH engine compartment..........................................................
6. Door switches
7. Ultrasonic sensor Interior light switch panel....................................................
8. Lock barrel, sill buttons
9. Handset and key
10. Battery backed-up sounder or horn * RH engine compartment......................
11. Immobilisation unit (spider) * Above heater...................................
12. Aerial Part of fascia harness.......................................................................
* where applicable

86ELECTRICAL
8
DESCRIPTION AND OPERATION DETECTION COMPONENTS
Switches
Perimetric protection for the vehicle is provided by
ECU inputs connected to the following:
Key switches (including starter)
Sill buttons
Bonnet switch
Door switches
Ultrasonic sensor
The ultrasonic sensor is located on the interior light
switch panel and triggers the alarm if movement is
detected.
WARNING INDICATORS
Battery backed-up sounder
The battery backed-up sounder is located in the
engine compartment and provides an audible warning
whenever the alarm is triggered.
NOTE: Disconnecting the vehicle battery
will result in the alarm sounding if the
correct procedure has not been followed.
See Repair, Battery.
Engine immobilisation warning light (EIWL)
The engine immobilisation warning light is located in
the instrument pack and provides a visual indication
that the engine is immobilised.
Anti-theft alarm indicator light
The anti-theft alarm indicator light is located in the
instrument pack and provides a visual indication of the
alarm status.
Inertia switch and central door locking
As a safety feature, the alarm system is designed to
recognise the inertia switch and via the ECU, unlock
the doors in the event of a collision.
NOTE: This feature only applies when the
starter switch is in the on position.ANTI-THEFT ALARM OPERATION (96 MODELS)
Full arming and immobilisation
Locking the vehicle using the handset immobilises the
engine and initializes both volumetric and perimetric
protection, providing:
1.After a lock signal has been received, a period of
15 seconds has elapsed during which no
movement is detected inside the vehicle;
2.No door or bonnet is open.
NOTE: If either of the above conditions are
not satisfied, the alarm will only be
partially armed. This is a mislock condition
which will be made apparent by a delay of 10
seconds before the anti-theft alarm indicator
begins to flash.
Disarming the alarm
NOTE: ALWAYS disarm the alarm using
the handset.
Unlocking with the key will not disarm the alarm or
mobilise the vehicle. If the handset fails to unlock the
vehicle
See Repair, Handset.
Partial arming and immobilisation
The alarm will be partially armed and the engine
immobilised if the vehicle is locked with the handset or
key, if:
1.After a lock signal has been received, a period of
15 seconds has elapsed during which movement
is detected inside the vehicle;
2.A door or bonnet is open.
NOTE: This is a mislock condition which
will be made apparent by a delay of 10
seconds before the anti-theft alarm
indicator begins to flash. Subsequent closure of
the offending aperture will cause the alarm to
attempt full arming as previously described.
Immobilisation
The vehicle will be automatically immobilised
whenever any of the following conditions occur:
1.The vehicle is locked using the handset.
2.The vehicle is locked using the key.
3.Thirty seconds after the starter switch has been
turned off AND the driver's door opened.
4.Five minutes after the starter switch is turned off
or the alarm disarmed.

86ELECTRICAL
10
DESCRIPTION AND OPERATION Radio frequency system
The RF system uses frequencies according to market
and both ECU and handset are colour coded:
Territory ECU/Handset............................... Frequency..................
Europe Blue/Blue.................................. 433.92 MHz.........................
NAS Green/Green....................................... 315.00 MHz....................
Japan Green/Green.................................... 315.00 MHz....................
Gulf Green/Green....................................... 315.00 MHz....................
Rest of World Green/Brown........................ 315.00 MHz...................
NOTE: In service NAS, Japan and Gulf will
have the handset changed to brown.
Passive coil
The passive coil excites a receiving coil in the handset
causing it to automatically transmit a remobilisation
signal to the ECU.
Inertia switch and central door locking
Actuation of the inertia switch will cause the doors to
be unlocked. A time-out period (programmable
between 0-5 minutes) will ensue, during which all CDL
and alarm activity is disabled.
NOTE: This feature only applies when the
starter switch is in the on position.
Handset
Under normal circumstances pressing the respective
buttons on the handset once, will unlock or lock the
vehicle. If operating the handset does not achieve the
desired effect
See Repair, Handset.
Functional detail
For full functional details and circuit diagrams
See
Electrical Trouble Shooting Manual..
Vehicle traceability
All Land Rover vehicles are fitted with a multitude of
discreet security features to prevent theft or assist
recovery in the event of a vehicle being stolen. All
vehicles are traceable, since it is impossible to
remove all security identification.