Defender 300Tdi (1996+). Manual — part 106
86
ELECTRICAL
4
REPAIR
HANDSET BATTERY
Service repair no - 86.77.13
Remove
1. Unlock vehicle and disarm alarm system.
2. Turn starter switch to position ’II’.
3. Turn starter switch back to position ’0’ and
remove key.
4. Carefully prise handset apart, starting from
keyring end, using a coin or small screwdriver.
5. Slide battery out from retaining clip.
6. Press and hold one of the handset buttons for at
least five seconds to drain any residual power
from handset.
NOTE: The engine will immobilise five
minutes after key is removed from starter
switch.
Refit
7. Fit new battery into handset retaining clip with
positive side uppermost. Finger marks will
adversely affect battery life; if possible, avoid
touching flat surfaces of battery and wipe clean
before fitting.
8. Reassemble two halves of handset.
9. Press RH (Padlock) button at least four times
within range of vehicle to resynchronise handset.
10. Check operation of alarm system.
WARNING: The handset contains delicate
electronic circuits and must be protected
from impact and water damage, high
temperatures and humidity, direct sunlight and
effects of solvents, waxes and abrasive cleaners.
NOTE: New handsets must be be
initialised using TestBook.
ELECTRICAL
5
REPAIR
PASSIVE COIL
Service repair no - 86.77.35
Remove
1. Remove LH front seat cushion.
2. Release retaining clip and remove battery
access cover.
3. Slacken battery negative lead clamp bolt.
4. Turn starter switch ’on’.
5. Turn starter switch ’off’ and remove key.
6. Disconnect battery negative lead.
NOTE: Operation 6 needs to be carried out
within 15 seconds to avoid activating
battery backed-up alarm sounder, if fitted.
7. Remove steering wheel
See STEERING,
Repair, Steering wheel.
8. Remove 4 screws securing instrument panel to
fascia cowl
See INSTRUMENTS, Repair,
Instrument panel.
9. Pull instrument panel away from fascia and
disconnect speedometer cable, multi-plugs,
alarm LED plug lead, heated rear screen lead,
gearbox oil temperature lead and immobiliser
warning light leads.
10. Remove instrument panel.
11. Remove 7 screws securing upper and lower
halves of nacelle to steering column mounting
bracket
See STEERING, Repair, Steering
column nacelle.
12. Release multi-switch gaiters from both sides of
nacelle.
13. Remove nacelle upper and lower halves from
steering column; collect blanking grommet from
RH side.
14. Disconnect multi-plug and remove passive coil
from starter switch.
Refit
15. Feed passive coil plug lead into fascia cowl area
and reconnect multi-plug .
16. Fit coil on starter switch.
17. Position nacelle upper and lower halves to
steering column mounting bracket and secure
with 7 screws. Do not fully tighten screws at this
stage
See STEERING, Repair, Steering
column nacelle.
18. Check that passive coil is still fitted correctly on
starter switch.
19. Check fit of nacelle at starter switch and steering
column and fully tighten fixing screws.
20. Fit multi-switch gaiters to both sides of nacelle
and check that blanking grommet is located.
21. Position instrument panel to fascia cowl area
and reconnect immobiliser warning light leads,
gearbox oil temperature lead, heated rear screen
lead, alarm LED plug lead, main harness multi-
plugs and speedometer.
22. Secure instrument panel to fascia cowl with 4
screws
See INSTRUMENTS, Repair,
Instrument panel.
23. Fit steering wheel
See STEERING, Repair,
Steering wheel.
24. Reconnect battery negative lead.
25. Fit battery access cover.
26. Fit LH seat cushion.
27. Test immobilisation and alarm system.
86
ELECTRICAL
6
REPAIR
IMMOBILISATION SPIDER
Service repair no - 86.77.03
Remove
1. Remove LH front seat cushion.
2. Release retaining clip and remove battery
access cover.
3. Slacken battery lead clamp bolts.
4. Turn starter switch ’on’.
5. Turn starter switch ’off’ and remove key.
6. Disconnect battery leads.
NOTE: Operation 6 needs to be carried out
within 15 seconds to avoid activating
battery backed-up alarm sounder, if fitted.
7. Remove battery clamp and ’J’ bolts.
8. Remove 4 nuts securing immobilisation spider
housing box to fixing studs on front face of
battery box.
9. Remove grommet securing spider harness to
corner face of battery box.
10. Carefully pull harness into battery box, lift spider
housing box and place on front edge of seat
base.
11. Using a suitable sheet to protect inside of
vehicle, grind heads off 6 monobolts securing lid
to spider box housing.
12. Detach lid from housing and disconnect spider
harness plug.
13. Unscrew two nuts and remove immobilisation
spider from lid studs.
NOTE: If spider box lid and/or sealing
gasket is damaged during operation 11 a
new lid will need to be fitted.
NOTE: A new immobilisation spider must
be initialised using TestBook.
Refit
14. Fit immobilisation spider onto lid studs and
secure with retaining nuts.
15. Reconnect harness plug to spider and ensure it
fully ’clicks’ home.
16. Position lid and spider assembly into box
housing so that harness plug is furst away from
harness entry.
17. Secure lid to spider box housing with monobolts.
18. Refit harness grommet into spider box, if
disturbed on removal procedures, and ensure
harness covering is fully inserted through
grommet to make water tight seal.
19. Push excess harnes cable through corner face
of battery box and fit grommet.
20. Fit spider housing box to fixing studs and secure
with four nuts.
21. Fit ’J’ bolts and clamp to secure battery,
22. Reconnect battery leads.
23. Fit battery access cover.
24. Fit LH seat cushion.
25. Test immobilisation and alarm system.
ELECTRICAL
7
REPAIR
BONNET SWITCH
Service repair no - 86.55.89
Remove
1. Disconnect bonnet switch harness multi-plug.
2. Release harness retaining clip from switch
mounting bracket.
3. Press in retaining clips and remove switch from
mounting bracket.
Refit
4. Insert harness multi-plug and bonnet switch into
mounting bracket. Push switch firmly down to
secure in position.
5. Connect harness multi-plug.
6. Fit harness retaining clip in mounting bracket.
ULTRASONIC SENSOR
Service repair no - 86.77.32
Remove
1. Carefully prise ultrasonic sensor from cantrail
trim.
2. Disconnect harness plug and remove sensor.
NOTE: Position of sensor will change
according to vehicle type.
Refit
3. Connect harness plug to sensor.
4. Fit sensor to cantrail trim.
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