ECU LAND ROVER DISCOVERY 1995 Service Repair Manual

86ELECTRICAL
38
REPAIR REVERSE LIGHT SWITCH
Service repair no - 37.27.01
Manual Gearbox
Remove
Reverse light switch is located at rear of selector
housing, accessible from beneath vehicle.
1.Place vehicle on suitable ramp.
2.Disconnect the battery negative lead.
3.Disconnect electrical leads.
4.Release lock-nut.
5.Remove switch.
NOTE: Reverse light switch requires
re-setting on reassembly.
6.Select reverse gear.
7.Connect 12 volt supply and test lamp across
switch terminals.
8.Screw switch into housing until test lamp is
illuminated. Screw switch in a further half turn,
tighten locknut.
9.Connect electrical leads.
10.Reconnect the battery negative lead.HEATER/VENTILATION AND AIR CONDITIONING
CONTROL PANEL BULB
Service repair no - 86.45.73
Remove
1.Carefully pull 3 rotary knobs off switches.
2.Prise blower speed control knob off lever.
3.Remove 2 screws securing panel, ease panel
away from fascia.
4.Pull bulb from holder.
5.Insert new bulb in holder.
Refit
6.Reverse removal procedure.

ELECTRICAL
39
REPAIR CIGAR LIGHTER AND BULB
Service repair no - 86.65.60
Service repair no - 86.45.55
Cigar Lighter
Remove
1.Remove centre console.
See CHASSIS AND
BODY, Repair, Centre Console
2.Depress lugs securing cigar lighter, withdraw
lighter from centre console.
Bulb replacement
3.Remove bulb from holder.
Refit
4.Reverse removal procedure.OIL PRESSURE WARNING SWITCH - V8i
Service repair no - 86.65.30
Remove
1.Disconnect the battery negative lead.
2.Disconnect electrical lead.
3.Unscrew switch unit.
4.Remove switch and sealing washer.
Refit
5.Reverse removal procedure. Using a NEW
sealing washer.

86ELECTRICAL
40
REPAIR INSTRUMENT ILLUMINATION ELECTRONIC
DIMMER/RHEOSTAT
Service repair no - 86.65.07
Electronic dimming control switch is located in
instrument panel finisher. Rotate control to vary
intensity of illumination.
Remove
1.Disconnect the battery negative lead.
2.Remove instrument panel finisher.
See
CHASSIS AND BODY, Repair, Instrument
Panel Finisher
3.Remove 2 screws securing rheostat, remove
rheostat.
Refit
4.Reverse removal procedure.WINDOW LIFT/HEATED SEAT CUSHION
SWITCHES AND BULBS
Service repair no - 86.25.16 - Switches
Service repair no - 86.45.29 - Bulb
Switch Replacement
1.Disconnect the battery negative lead.
2.Carefully release rear of surround from centre
console.
3.Remove screws, pry window lift switch surround
from glove box.
4.Disconnect multi-plug(s) at rear of switch(es).
5.Apply pressure to rear of switch, push it through
surround.
Bulb replacement
6.Identify bulb to be replaced and remove
appropriate switch.
7.Rotate bulb holder 90°and withdraw it from
switch; discard bulb and holder.
Refit
8.Reverse removal procedure.

86ELECTRICAL
42
REPAIR FOG LAMP - FRONT
Service repair no - 86.40.96
Remove
1.Locate and release lamp harness multiplug from
clip behind headlamp.
2.Disconnect multiplug.
3.Attach a draw string to harness.
4.Remove 2 nuts securing lamp bracket to bumper
studs.
5.Remove 2 screws securing lamp bracket to
spoiler.
6.Release lamp assembly and pull lamp harness
through front panel.
7.Detach draw string from harness.
8.Remove lamp/bracket assembly.
9.Remove 2 spire nuts from lamp bracket.
Refit
10.Reverse removal procedure.

ELECTRICAL
43
REPAIR ANTI-THEFT ALARM ECU (96 MODELS)
Service repair no - 86.55.85
Remove
1.Remove 4 studs securing fascia left hand
closing panel.
2.Remove closing panel.
3.Disconnect 2 multiplugs from ECU.
4.Remove nut securing ECU/relay bracket.
5.Lower bracket.
6.Remove 2 nuts securing ECU to bracket.
7.Remove ECU.
NOTE: A new ECU must be initialised
using TestBook.
Refit
8.Reverse removal procedure.HANDSET (96 MODELS)
If vehicle does not respond to handset immediately, it
may have lost synchronisation. To re-synchronise,
press either button, 4 times in quick succession. If
handset still fails to respond, check batteries, refer to
Owner's handbook. If batteries are okay, it may be
necessary to use emergency key access, refer to
Owner's handbook.
NOTE: New handsets must be initialised
using TestBook.
PASSIVE COIL (96 MODELS)
Service repair no - 86.77.35
Remove
1.Remove steering column shroud.
See
STEERING, Repair, Steering column shroud
2.Release multiplug from harness clip and
disconnect.
3.Release passive coil from starter switch.
4.Remove bulb holder/starter switch shroud.
5.Remove coil.
Refit
6.Fit coil, ensuring switch illumination bulb harness
passes through large cut-out.
7.Secure coil with cable tie.
8.Position bulb holder/starter switch shroud and
locate bulb.
9.Locate bulb holder/starter switch shroud,
ensuring cut-out in shroud aligns with lug on
starter switch.
10.Connect multiplug and secure to clip.
11.Fit column shroud.

86ELECTRICAL
44
REPAIR BONNET SWITCH
Service repair no - 86.55.89
Remove
1.Remove 2 bolts securing sounder, move
sounder aside.
2.Locate and disconnect bonnet switch multiplug.
3.Release and remove switch.
Refit
4.Reverse removal procedure.ULTRASONIC SENSOR
Service repair no - 86.77.32
Remove1.Release sensor from switch panel.
2.Disconnect multiplug and remove sensor.
Refit
3.Reverse removal procedure.
ANTI-THEFT ALARM INDICATOR LIGHT (96
MODELS)
Service repair no - 86.45.61
See Instrument illumination and warning light
bulbs
ENGINE IMMOBILISATION WARNING LIGHT (96
MODELS)
Service repair no - 86.45.61
See Instrument illumination and warning light
bulbs

ELECTRICAL
45
REPAIR SOUNDER (96 MODELS)
Service repair no - 86.55.87
Remove
NOTE: Failure to follow steps 1 and 2 will
result in sounder being activated.
1.Turn starter switch 'ON' then 'OFF'.
2.WITHIN 15 SECONDS, depress release clip on
multiplug and detach from sounder.
3.Remove 2 securing bolts and remove sounder
complete with bracket.
Refit
4.Reverse removal procedure.
NOTE: If sounder is accidentally activated,
it can be silenced, provided it is
reconnected, by turning starter switch to
position II.SWITCH - ELECTRIC SEAT
Service repair no - 86.75.03
Remove
1.Release switch panel from centre console.
2.Disconnect 2 switch multiplugs
3.Remove switch panel.
Refit
4.Reverse removal procedure.

86ELECTRICAL
46
REPAIR STARTER MOTOR - 4.0 V8
Service repair no - 86.60.01
Remove
1.Disconnect battery negative lead.
2.Raise vehicle on ramp.
3.Remove heated oxygen sensor from RH front
exhaust pipe.
See EMISSION CONTROL,
Repair, Heated Oxygen Sensor (HO2S) - 4.0
V8
4.Mark front propeller shaft and drive flanges for
assembly reference.
5.Remove 4 nuts and bolts securing propeller
shaft flange.
NOTE: Raise 1 front road wheel and rotate
propeller shaft to gain access to all
fixings.
6.Tie propeller shaft aside.
7.Position starter motor heat shield above motor.
See Starter Motor Heat Shield - 4.0 V8
8.Disconnect Lucar from solenoid.
9.Remove nut securing feed wires to starter
solenoid and disconnect from terminal.

ELECTRICAL
47
REPAIR
10.From above, remove top bolt securing starter
motor and position earth lead aside.
NOTE: To assist removal, use 230 mm
extension bar positioned between engine
mounting bracket and exhaust manifold.
11.Remove bottom bolt securing starter motor.
12.Remove starter motor.Refit
13.Ensure mating faces are clean.
14.Locate starter motor in fitted position and fit
bottom bolt finger tight.
15.Fit top bolt. Tighten to
42 Nm.
16.Bottom bolt. Tighten to42 Nm.
17.Connect feed wires to solenoid terminal. Secure
with nut.
18.Connect Lucar to starter solenoid.
19.Manoeuvre heat shield down and forward to
position bracket against engine mounting.
Engage clip on solenoid.
20.Align bracket to hole using suitable tool and fit
retaining bolt.
21.Clean flange mating surfaces, locate propeller
shaft and align reference marks.
22.Fit bolts and NEW nyloc nuts. Tighten to
48 Nm.
NOTE: Fit bolts with head towards transfer
box and away from differential.
23.Lower vehicle.
24.Reconnect battery negative lead.

86ELECTRICAL
48
REPAIR STARTER MOTOR HEAT SHIELD - 4.0 V8
Service repair no - 86.60.12
Remove
1.Disconnect battery negative lead.
2.Raise vehicle on ramp.
3.Remove heated oxygen sensor from RH exhaust
front pipe.
See EMISSION CONTROL, Repair,
Heated Oxygen Sensor (HO2S) - 4.0 V8
4.Remove bolt securing heat shield to RH engine
mounting bracket.
5.Release heat shield clip from starter solenoid.
6.Manoeuvre heat shield rearwards and around
starter motor.
Refit
7.Reverse removal procedure.BULB - FRONT FOG LAMP
Service repair no - 86.40.94
Remove
1.Remove front fog lamp.
See fog lamp - front
2.Remove 2 Torx screws securing fog lamp to
bracket and collect 2 spacers.
3.Release fog lamp adjustment ball joint from
bracket and remove lamp.
4.Release lamp lens from shroud.
5.Disconnect 2 Lucars from bulb.
6.Release bulb retaining clip.
7.Remove bulb from lens.