1995 LAND ROVER DISCOVERY engine

ELECTRICAL
5
REPAIR ELECTRONIC IGNITION - V8i
A Lucas 35DLM8 distributor is employed. This has a
conventional vacuum advance unit and centrifugal
automatic advance mechanism.
A pick-up module, in conjunction with a rotating timing
reluctor inside distributor body, generates timing
signals. These are applied to an electronic ignition
amplifier module mounted on side of distributor body.
NOTE: Pick-up air gap is factory set. Do
not adjust gap unless pick-up is being
changed or base plate has been moved.
Use a non-ferrous feeler gauge to set air gap.
IGNITION COIL
Service repair no - 86.35.32
Remove
1.Disconnect battery negative lead.
2.Noting their fitted positions, disconnect electrical
leads from ignition coil.
3.Remove two bolts securing ignition coil clamp,
recover suppressor.
4.Remove coil.
Refit
5.Reverse removal procedure.DISTRIBUTOR - V8i
Service repair no - 86.35.20
Remove
1.Disconnect battery negative lead.
2.Disconnect vacuum hose.
3.Remove distributor cap.
4.Disconnect low tension lead from coil.
5.Mark distributor body and centre line of rotor
arm.
6.Add alignment marks to distributor and front
cover.
NOTE: Marking distributor enables
refitting in exact original position, but if
engine is turned while distributor is
removed, complete ignition timing procedure
must be followed.
7.Release distributor clamp and remove
distributor.

86ELECTRICAL
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REPAIR Refit
NOTE: If a new distributor is being fitted,
mark body in same relative position as
distributor removed.
8.Leads for distributor cap should be connected as
illustrated.
Figures 1 to 8 inclusive indicate plug lead
numbers.
RH-Right hand side of engine, when viewed
from rear.
LH-Left hand side of engine, when viewed from
rear.
9.If engine has not been turned while distributor
has been removed, carry out instructions 10. to
17. Alternatively proceed to instruction 18.
10.Fit new 'O' ring seal to distributor housing.
11.Turn distributor drive until centre line of rotor arm
is 30Ê anti-clockwise from mark made on top
edge of distributor body.
12.Fit distributor in accordance with alignment
markings.
NOTE: It may be necessary to align oil
pump drive shaft to enable distributor
drive shaft to engage in slot.
13.Fit clamp and bolt. Secure distributor in exact
original position.
14.Connect vacuum hose to distributor and low
tension lead to coil.
15.Fit distributor cap.
16.Reconnect battery.
17.Using suitable electronic equipment, set ignition
timing.
See Adjustment, Ignition timing
18.If engine has been turned with distributor
removed, carry out instructions 19 to 30.
19.Set engine-No. 1 piston to static ignition timing
figure
See ENGINE TUNING DATA,
Information, Engine 3.9 V8i
20.Turn distributor drive until rotor arm is
approximately 30Ê anti-clockwise from number
one sparking plug lead position on cap.
21.Fit distributor to engine.
22.Check that centre line of rotor arm is now in line
with number one sparking plug lead on cap.
Reposition distributor if necessary.
23.If distributor does not seat correctly in front
cover, oil pump drive is not engaged. Engage by
lightly pressing down distributor while turning
engine.
24.Fit clamp and bolt, do not tighten.
25.Set ignition timing statically to 6Ê B.T.D.C.
26.Connect vacuum hose to distributor.
27.Fit low tension lead to coil.
28.Fit distributor cap.
29.Reconnect battery.
30.Using suitable electronic equipment set the
ignition timing.
See Adjustment, Ignition
timing

86ELECTRICAL
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REPAIR PRINTED CIRCUIT AND WARNING LIGHTS
1. Panel illumination bulbs
2. Transmission oil temperature warning lamp bulb
3. Hazard warning lamp bulb
4. Check engine warning lamp bulb
5. Handbrake/brake fluid warning lamp bulb
6. ABS warning lamp bulb
7. Headlamp main beam warning lamp bulb
8. Trailer direction warning lamp bulb9. Direction indicator warning lamp bulb
10. Air suspension warning lamp bulb
11. Ignition/no charge warning lamp bulb
12. Seat belt warning lamp bulb
13. Not used
14. Traction control warning lamp bulb
15. Diesel heater plug warning lamp bulb (if fitted)
16. Main printed circuit

ELECTRICAL
41
REPAIR COOLANT TEMPERATURE TRANSMITTER - V8i
Service repair no - 26.10.02
Remove
1.Disconnect battery negative lead.
2.Disconnect lead from transmitter.
3.Remove transmitter, discard sealing washer if
fitted.
Refit
4.Coat threads of replacement transmitter with
Loctite 572.
5.Fit a new sealing washer to transmitter.
6.Fit transmitter, connect lead.
7.Top-up cooling system.HEATED FRONT SCREEN
Heated front screen will operate when switch is
operated, with engine running. Timer unit will provide
a preset time cycle of 7« minutes±20%.
To identify timer unit.
See Electrical Trouble
Shooting Manual.Electrical Troubleshooting
Manual
Switching OFF ignition, or further operation of heated
front screen switch during cycle will switch off screen
and cancel, reset and switch off timer unit.

86ELECTRICAL
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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
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
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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.

86ELECTRICAL
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OVERHAUL
LUBRICATION
Apply clean engine oil:
a. A spot into rotor spindle before fitting rotor
arm.
Apply Omnilube 2 (or equivalent) grease.
b. Auto advance mechanism.
c. Pick-up plate centre bearing.
d. Pre tilt spring and its rubbing area (pick-up
and base plate assembly).
e. Vacuum unit connecting peg (pick-up and
base plate assembly).
f. Connecting peg hole in vacuum unit
connecting rod.
Fitting pick-up and base plate assembly
1.Pick-up leads must be prevented from fouling
rotating reluctor. Both leads should be located in
plastic guide as illustrated. Check during
re-assembly.
Fitting reluctor
2.Slide reluctor as far as it will go on rotor shaft,
rotate reluctor until it engages with coupling ring
beneath pick-up base plate. Distributor shaft,
coupling ring and reluctor are 'keyed' and rotate
together. Fit 'O' ring, flat washer and retaining
circlip.Pick-up air gap adjustment
1.Air gap between pick-up limb and reluctor teeth
must be set within specified limits, using a
non-ferrous feeler gauge.
2.If adjustment is necessary, loosen two barrel
nuts to set the air gap.
See ENGINE TUNING
DATA, Information, Engine 3.9 V8i
NOTE: When original pick-up and base
plate assembly has been refitted, air gap
should be checked, and adjusted if
necessary.
When fitting a new assembly air gap will require
adjusting to within specified limits.
Amplifier module
1.Before fitting module, apply MS4 Silicone grease
or equivalent heat-conducting compound to
amplifier module backplate, seating face on
distributor body and both faces of heatsink
casting.