1996 LAND ROVER DEFENDER ECU

86ELECTRICAL
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.

86ELECTRICAL
8
REPAIR ALARM SOUNDER
Service repair no - 86.55.87
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.
NOTE: If an alarm sounder without battery
back-up is fitted, it is not necessary to
disconnect battery.
7.Remove 2 nuts securing power steering pump
reservoir mounting bracket to front, LH inside
wing.
8.Move steering pump reservoir aside to gain
access to alarm sounder.
9.Disconnect harness multi-plug from rear of alarm
sounder.
10.Unscrew 2 bolts and remove alarm sounder from
inside wing.
Top illustration - alarm sounderwithbattery
back-up.
Lower illustration - alarm sounderwithout
battery back-up.
NOTE: A new battery backed-up alarm
sounder will not operate until charged by
vehicle generator for approximately three
hours.
Refit
11.Secure alarm sounder to inside wing, tightening
bolts to
10 Nm (7 lbf/ft).
12.Reconnect multi-plug to alarm sounder.
13.Secure power steering pump reservoir to inside
wing, tightening nuts to
10 Nm (7 lbf/ft).
14.Reconnect battery negative lead.
15.Fit battery access cover.
16.Fit LH seat cushion.

ELECTRICAL
9
REPAIR ALARM SOUNDER RELAY
Service repair no - 86.77.09
Remove
1.Remove screw and lift off LH door check strap
cover.
2.Remove 3 screws and lower wiper motor cover
from fascia bulkhead, (on RH drive models first
remove grab handle).
3.Slide relay multi-plug from retaining bracket and
remove relay.
Refit
4.Secure multi-plug to mounting bracket and fit
new relay.
5.Position wiper motor cover and secure with 3
screws.
6.On RH drive models fit grab handle.
7.Fit door check strap and secure with screw.ANTI-THEFT ALARM INDICATOR LIGHT
Service repair no - 86.45.61
Remove
1.Remove LH front seat cushion.
2.Release retaing 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.
NOTE: If an alarm sounder without battery
back-up is fitted, it is not necessary to
disconnect battery.
7.Remove steering wheel
See STEERING,
Repair, Steering wheel.
8.Remove 4 screws securing instrument panel to
fascia cowl.
9.Pull instrument panel away from fascia and
disconnect speedometer cable, if necessary.
10.Disconnect alarm indicator light plug lead.
11.Press in retaining lugs and withdraw indicator
light from fascia panel.

86ELECTRICAL
10
REPAIR Refit
12.Fit alarm indicator light into fascia panel and
reconnect plug lead.
13.Reconnect speedometer cable and fit instrument
panel to fascia cowl.
14.Fit steering wheel
See STEERING, Repair,
Steering wheel.
15.Reconnect battery negative lead.
16.Fit battery access cover.
17.Fit LH seat cushion.ALARM SYSTEM FUSE
Service repair no - 86.77.04
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.
NOTE: If an alarm sounder without battery
back-up is fitted, it is not necessary to
disconnect battery.
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, main harness
multi-plugs, alarm LED plug lead, heated rear
screen leads, gearbox oil temperature lead and
immobiliser warning light lead.
10.Remove instrument panel.
11.Remove alarm system 15 amp (blue) fuse from
holder located behind starter switch.

ELECTRICAL
11
REPAIR REV: 05/99 Refit
12.Fit new fuse.
13.Position instrument panel to fascia cowl area
and reconnect immobiliser warning light leads,
gearbox oil temperature lead, heated rear screen
leads, alarm LED plug lead, main harness
multi-plugs and speedometer cable,
14.Secure instrument panel to fascia cowl with 4
screws
See INSTRUMENTS, Repair,
Instrument panel.
15.Fit steering wheelSee STEERING, Repair,
Steering wheel.
16.Reconnect battery negative lead.
17.Fit battery access cover.
18.Fit LH front seat cushion.GENERATOR
Service repair no - 86.10.02
Remove
1.Disconnect battery.
2.Remove drive belt
See Auxiliary drive belt.
3.Unscrew 3 fixings, remove heat shield from rear
of generator, and disconnect electrical leads
from generator.
4.Remove generator bottom fixing bolt.
5.Remove long through bolt from top fixing and lift
generator from engine.
Refit
6.Fit generator to engine mounting bracket and
secure with top and bottom fixing bolts.
7.Connect electrical leads.
8.Fit heat shield.
9.Fit drive belt
See Auxiliary drive belt; Refit.
10.Reconnect battery.

86ELECTRICAL
12
REPAIR AUXILIARY DRIVE BELT
Service repair no - 86.10.03
NOTE: If cast lines on tensioner arm and
tensioner spring case are aligned, a new
drive belt must be fitted.
Remove
1.Disconnect battery.
2.Remove fan cowl
See COOLING SYSTEM,
Repair, Fan cowl.
3.Apply ring spanner to tensioner pulley retaining
bolt.
4.Turn spanner to release pulley tension from belt.
5.Detach belt from pulley.
6.Release tensioner.
7.Complete removal of belt. Mark direction on belt
if refitting.
Refit
8.Using ring spanner, release pulley tensioner and
fit new drive belt.
9.Remove ring spanner, drive belt will
automatically tension.
10.Fit fan cowl
See COOLING SYSTEM, Repair,
Fan cowl.
STARTER MOTOR
Service repair no - 86.60.01
Remove
1.Disconnect battery.
2.Disconnect electrical leads from starter solenoid.
3.Remove 3 fixings securing starter motor to
flywheel housing.
4.Withdraw starter motor.
Refit
5.Locate starter motor and secure to flywheel
housing.
6.Reconnect electrical leads to starter solenoid.
7.Reconnect battery.

86ELECTRICAL
14
REPAIR SIDE, TAIL AND DIRECTION INDICATOR LAMPS
Service repair no - 86.40.34 - Front side lamp
Service repair no - 86.40.45 - Tail lamp
Service repair no - 86.40.42 - Front direction
indicator lamp
Service repair no - 86.40.43 - Rear direction
indicator lamp
Remove
1.Remove 2 screws and withdraw lamp unit.
2.Hold bulb holder and twist lens to release.
3.Push and twist bulb to remove from holder.
Refit
4.Fit new bulb, if necessary.
5.Fit bulb holder to lamp lens.
6.Secure lamp to vehicle.SIDE REPEATER LAMP
Service repair no - 86.40.53.
Remove
1.Push lens firmly to the right.
2.Lift left edge and withdraw lamp unit from wing.
3.Twist bulb holder and release from lens.
4.Pull bulb from holder.
Refit
5.Fit new bulb, if necessary.
6.Fit bulb holder to lens.
7.Locate lamp unit in wing and push firmly to the
left to secure.