brake sensor LAND ROVER DISCOVERY 1995 Service Repair Manual

LUBRICANTS, FLUIDS AND CAPACITIES
3
INFORMATION Propeller shaft Front
and RearNLGI - 2 Multi-purpose Lithium based GREASE
Lubrication nipples
(hubs, ball joints
etc.)
Seat slides
Door lock striker
Brake and clutch
reservoirsBrake fluids having a minimum boiling point of 260°C (500°F) and complying with
FMVSS 116 DOT4
Engine coolant Use an ethylene glycol based anti-freeze (containing no methanol)
V8i, Tdi, Mpi with non-phosphate corrosion inhibitors suitable for use in aluminium engines to ensure
the protection of the cooling system against frost and corrosion in all seasons. Use one
part anti-freeze to one part water for protection down to -36°C (-33°F).
IMPORTANT: Coolant solution must not fall below proportions one part
anti-freeze to three parts water, i.e. minimum 25% anti-freeze in coolant otherwise
damage to engine is liable to occur. Or a maximum of 60%.
Battery lugs, Petroleum jelly.
Earthing surfacesNOTE: Do not use Silicone Grease
where paint has
been removed
Air Conditioning
System Refrigerant Use only refrigerant R134a
Compressor Oil Nippon Denso ND-oil8 Unipart ND-oil8
ABS Sensor Silicone grease: Staborags NBU - Wabco 830 502,0634
bush-rear Wacker chemie 704 - Wabco 830 502,0164
Kluber GL301
LUBRICATION PRACTICE
Use a high quality oil of the correct viscosity range and service classification in the engine during maintenance and
when topping up. The use of oil not to the correct specification can lead to high oil and fuel consumption and
ultimately to damaged components.
Oil to the correct specification contains additives which disperse the corrosive acids formed by combustion and
prevent the formation of sludge which can block the oilways. Additional oil additives should not be used. Always
adhere to the recommended servicing intervals.
WARNING: Many liquids and other substances used in motor vehicles are poisonous. They must
not be consumed and must be kept away from open wounds. These substances, among others,
include anti-freeze windscreen washer additives, lubricants and various adhesives.

10MAINTENANCE
18
MAINTENANCE
ABS VEHICLES - CHECK ROAD WHEEL SPEED
SENSOR ELECTRICAL HARNESS FOR DAMAGE
RENEW OXYGEN SENSORS
See EMISSION CONTROL, Repair, Heated
Oxygen Sensor (HO2S)
RENEW CATALYTIC CONVERTERS
See MANIFOLD AND EXHAUST SYSTEM, Repair,
Exhaust System Complete
REPORT ANY UNUSUAL FEATURES OF VEHICLE
CONDITION AND ADDITIONAL WORK REQUIREDCARRY OUT ROAD TEST
For details of dynamometer testing.See
INTRODUCTION, Information, Dynamometer
Testing - Non Anti-lock brake vehicles See
INTRODUCTION, Information, Dynamometer
Testing - Vehicles with Anti-lock brakes (ABS)
Check following items:
1.Inhibitor switch only operates in P and N.
2.Engine for excessive noise.
3.Clutch for slip, judder or spin.
4.Automatic gear selection/shift speeds.
5.Gear selection/noise - high/low range.
6.Steering for abnormal noise/effort.
7.Steering for free play.
8.All instruments, gauges and warning indicators.
9.Heater and air conditioning systems.
10.Heated rear screen.
11.Shock absorbers - ride irregularities.
12.Foot brake, on emergency stop, pulling to one
side, binding, pedal effort.
13.Parkbrake efficiency.
14.Seat reclining and latching.
15.Fully extend seat belt, check operation of
retraction and latching. Inertia belts lock when
snatched or vehicle on slope.
16.Road wheel balance.
17.Transmission for vibrations.
18.Body noises, squeaks and rattles.
19.Excessive exhaust smoke.
20.Engine idle speed.
21.Endorse service record.
22.Report any unusual features of vehicle condition
and additional work required.
ENDORSE SERVICE RECORD

MAINTENANCE
19
MAINTENANCE
RESET EMISSION MAINTENANCE REMINDER -
USA
The emission maintenance reminder is designed to
activate at 52,500 and 105,000 miles respectively and
will illuminate a 'Service Engine' red warning light in
instrument binnacle.
The emission maintenance reminder must be reset
after required maintenance has been carried out and
a new tamperproof label fitted by a Land Rover of
North America dealer. This emission maintenance
reminder is part of the Emission Control System
Reset
1.The control unit is located in the passenger
footwell.
2.Identify control unit and remove from plug.
3.Remove tamperproof label to reveal access hole
for resetting.
4.Place a thin metallic probe into access hole and
momentarily electrically short between reset pins
inside unit.RECOMMENDED SERVICE ITEMS
Refer Service Schedule sheets for intervals.
Clean sunroof drain tubes, clean and lubricate guide
rails and slides.
Renew the hydraulic brake fluid.
See BRAKES,
Repair, Brake System Bleed
Renew all hydraulic brake fluid, seals, brake servo
filter and flexible hoses.
All working surfaces of the master cylinder and caliper
cylinders should be examined and renewed where
necessary.
ABS vehicles only - renew hydraulic brake fluid and
flexible hoses examine the working surfaces of the
caliper cylinders and renew the seals or cylinders
where necessary.
Air cleaner - When the vehicle is used in dusty or field
conditions or deep wading, frequent attention to the
air cleaner may be required.
ABS vehicles used extensively in arduous off-road
conditions - check the rear wheel road speed sensor
for abrasive wear.

12ENGINE
12
REPAIR
12.Ensure service tools LRT-12-010 and
LRT-12-091 are scrupulously clean. Coat seal
guide and oil seal journal with clean engine oil.
CAUTION: Do not handle oilseal lip, check
it is not damaged. Ensure outside diameter
remains clean and dry.
13.Position oil seal guide LRT-12-010 on crankshaft
flange.
NOTE: Lubricant coating must cover seal
guide outer surface completely to ensure
that oil seal lip is not turned back during
assembly. Position oil seal, lipped side towards
engine, on seal guide. Seal outside diameter
MUST be clean and dry.
14.Fit oil seal using tool LRT-12-091. Remove seal
guide.
15.Tighten rear main bearing cap to
90 Nm.
16.Fit sump.
17.Fit flywheel or flexible drive plate and ring gear.ENGINE
Service repair no - 12.41.01
Remove
1.Park vehicle on level ground and apply park
brake.
2.De-pressurise fuel system.
See FUEL
SYSTEM, Repair, Depressurising Fuel
System
3.Remove bonnet [hood].See CHASSIS AND
BODY, Repair, Bonnet [Hood]
4.Remove battery.See ELECTRICAL, Repair,
Battery
5.Remove radiator/oil coolers.See COOLING
SYSTEM, Repair, Radiator/Oil Coolers
6.Place an absorbent cloth around fuel feed hose
at fuel rail and release compression nut.
Remove feed hose from rail, seal end of pipes
with masking tape to prevent ingress of dirt.
7.Release fuel return hose clamp and remove
hose from pressure regulator, seal both
openings with masking tape to prevent ingress of
dirt.
8.Remove vacuum hose from rear of regulator.
9.Manual vehicles: Disconnect throttle cable from
bracket. Automatic vehicles: Detach throttle
bracket from plenum chamber and lay assembly
to one side.
See FUEL SYSTEM, Repair,
Plenum Chamber DO NOT DISTURB KICK
DOWN CABLE SETTING.
10.Remove ram housing.See FUEL SYSTEM,
Repair, Ram Housing
11.Remove air flow sensor.See FUEL SYSTEM,
Repair, Air Flow Sensor
12.Remove air cleaner assembly.See FUEL
SYSTEM, Repair, Air Cleaner Assembly
13.Remove Generator.See ELECTRICAL,
Description and operation, Generator
14.Release air conditioning compressor from its
mounting and lay to one side. DO NOT
discharge air conditioning system.
See AIR
CONDITIONING, Repair, Compressor

4.0 V8
5
REPAIR 77.Release sensor/shield and remove.
78.Disconnect sensor multiplug.
79.Remove sensor.
80.Remove starter motor heatshield.
See
ELECTRICAL, Repair, Starter Motor
Heatshield - 4.0 V8
81.Disconnect solenoid Lucar.
82.Disconnect RH and LH knock sensor multiplugs.
See FUEL SYSTEM SFI, Repair, Knock
Sensor
83.Release harness from engine.
84.Remove nut securing handbrake cable
heatshield.
85.Release speed sensor lead from clip on
heatshield.
86.Remove heatshield.
87.Disconnect top oil cooler pipe union from
transmission.
88.Release union.
89.Remove 'O' ring and discard.
90.Plug pipe and transmission.
91.Remove bolt securing oil cooler pipe bracket tosump. Collect spacer.
92.Remove 3 bolts from top of bell housing.
93.Collect 2 harness brackets.
94.Remove 2 bolts, LH and RH side of bell housing.
95.Remove centre LH bell housing bolt using long
extension.
96.Remove 2 lower bolts from bell housing.
97.Fit suitable wooden block in access plate hole to
retain torque converter.
98.Secure block with cover plate and tighten one
cover plate bolt.
99.Support gearbox on a jack.
100.Lower ramp.
101.Position lifting chains and attach hooks to engine
lifting eyes.
102.Raise engine.
103.Raise jack.
104.Break engine to gearbox joint.
105.Raise engine.

12ENGINE
8
REPAIR 21.Release clip and disconnect inlet hose from
power steering pump.
22.Disconnect outlet pipe union at power steering
pump, discard 'O' ring.
CAUTION: Plug the connections
23.Release throttle cable from abutment bracket.
24.Release throttle cable from cam. Also remove
coolant bypass hose from throttle housing.
25.Disconnect stepper motor and throttle
potentiometer multiplugs.
26.Release clip and disconnect hose, air cleaner to
throttle housing.
27.Release clip and disconnect brake servo hose
from manifold.
28.Disconnect fuel temperature sensor multiplug.

Mpi
13
REPAIR 19.Connect crankshaft sensor, knock sensor, air
conditioning compressor, fuel injector harness,
inlet manifold air temperature and fuel
temperature sensor multiplugs.
20.Connect fuel hose to pressure regulator and
secure with clip.
21.Fit and tighten fuel pipe to fuel rail union.
22.Connect multiplugs to throttle housing.
23.Connect vacuum hose to manifold.
24.Connect oil pressure switch multiplug.
25.Connect brake servo hose to manifold, secure
with clip.
26.Connect throttle cable to cam.
27.Position engine harness and connect breather
hose to inlet manifold, secure with clip.
28.Connect coolant temperature sensor multiplugs,
secure harness with cable tie.
29.Connect oxygen sensor multiplug, secure
harness with cable tie.
30.Connect alternator harness.
31.Connect heater hose to heater rail and secure
with clip.
32.Connect hose to coolant pump and secure with
clip.
33.Connect inlet hose to power steering pump and
secure with clip.
34.Fit and tighten outlet pipe union to power
steering pump.
35.Connect bypass and top hose, secure with clip.
36.Connect air cleaner to throttle housing hose and
secure with clip.
37.Remove engine lifting bracket.
38.Position spark plug cover and secure with
screws.
39.Fill engine with oil.
40.Fit bonnet [hood].
See CHASSIS AND BODY,
Repair, Bonnet [Hood]
41.Fit radiator.See COOLING SYSTEM, Repair,
Radiator - Mpi
42.Adjust throttle cable.See FUEL SYSTEM,
Adjustment, Throttle Cable Adjustment
ENGINE SUMP GASKET
Service repair no - 12.60.43
Remove
1.Drain engine oil.
2.Refit drain plug, use new sealing washer if
necessary, tighten to the correct torque.
3.Remove 18 bolts securing sump.
NOTE: 25mm long bolt is fitted at rear L.H.
corner of sump.
4.Release sump from cylinder block.
5.Discard gasket.

12ENGINE
16
REPAIR 14.Release clip and disconnect brake servo hose
from manifold.
15.Disconnect fuel temperature sensor multiplug.
16.Remove 3 bolts securing engine harness to
manifold.
17.Disconnect fuel injection harness multiplug.
18.Disconnect inlet manifold air temperature sensor
multiplug.
19.Release clip and disconnect fuel hose from
pressure regulator.
CAUTION: Plug the connections
20.Release clips and disconnect 3 hoses from
manifold.
21.Remove bolt securing dipstick tube to coolant
rail.

12ENGINE
18
REPAIR Refit
1.Fit location dowels to cylinder head.
2.Fit cylinder head gasket to cylinder block.
3.Using assistance fit cylinder head to cylinder
block.
4.Lubricate cylinder head bolts.
5.Fit and tighten cylinder head bolts to the correct
torque and in the correct sequence.
NOTE: For torque values.See
Specifications, torque, Torque values
6.Fit timing belt.
7.Fit camshaft covers.
8.Fit spark plug leads to spark plugs and secure to
clips.
9.Fit spark plug cover and secure with screws.
10.Fit new gasket and secure downpipe to exhaust
manifold with nuts.
11.Fit bolt securing dipstick tube to coolant rail.
12.Connect 3 vacuum hoses to inlet manifold.
13.Connect fuel to pressure regulator, secure with
clip.
14.Connect fuel injection harness, inlet manifold air
temperature sensor and fuel temperature sensor
multiplugs.
15.Secure engine harness to manifold with bolts.
16.Connect brake servo hose to manifold, secure
with clip.
17.Connect air cleaner hose to throttle housing,
secure with clip.
18.Connect stepper motor and throttle
potentiometer multiplugs.
19.Fit and adjust throttle cable.
20.Connect oxygen sensor multiplug, secure with
cable tie.
21.Connect the bypass and top hose, secure with
clips.
22.Connect coolant temperature sensor multiplugs,
secure with cable tie.
23.Connect hose to heater rail and secure with clip.
24.Connect radiator bottom hose and secure with
clip.
25.Tighten fuel pipe to fuel rail union.
26.Reconnect battery negative lead.

Tdi
5
DESCRIPTION AND OPERATION Exhaust Gas Recirculation (EGR)
Operation of the EGR system is dependent on the
following:
a. Engine temperature - must be between 20°C
and 100°C approx.
b. Engine speed - must be between 630 and 2850
rev/min.
c. Engine load - calculated by throttle position
sensor.
d. EGR valve lift position.
e. Duration of engine idling.
Under varying engine speed and load conditions the
control unit sends a signal to open the vacuum
modulator which allows a vacuum to be applied above
the EGR valve diaphragm, the vacuum supply being
taken from a 'T' connector in the brake servo hose.
This process is controlled by an engine speed/load
map stored in the EGR control unit memory.
Engine speed is measured by monitoring the
waveform present on one phase of the generator.
Throttle position is measured via a sensor mounted on
the fuel injection pump throttle lever. Closed loop
control is achieved by allowing the control unit to
continually monitor EGR valve lift via a position sensor
mounted on the valve; this valve lift is compared with
the actual valve lift required on the control unit map
and adjusted if necessary.
With coolant temperature between 20°C and 100°C;
the engine having just returned to idle, EGR will shut
off after 25-30 seconds idling.