sensor LAND ROVER DEFENDER 1999 Workshop Manual

01INTRODUCTION
10
INFORMATION CROSS REFERENCE OF EMISSION SYSTEM
TERMINOLOGY
NEW TERM (ACRONYM)
Accelerator pedal (AP).................................................
Air cleaner (ACL)..........................................................
Air conditioning (A/C)...................................................
Battery positive voltage (B+)........................................
Closed loop (CL)..........................................................
Closed throttle position (CTP)......................................
Canister purge valve (CANPV)....................................
Data link connector (DLC)...........................................
Diagnostic trouble code (DTC).....................................
Distributor ignition (DI).................................................
Engine control module (ECM)......................................
Engine coolant level (ECL)...........................................
Engine coolant temperature (ECT)..............................
Engine speed (RPM)....................................................
Evaporative emission system (EVAP)..........................
Engine fuel temperature sensor (EFTS)......................
4th gear, 3rd gear etc. (4GR, 3GR)..............................
Fuel pump (FP)............................................................
Fan control module (FCM)...........................................
Generator (GEN)..........................................................
Ground (GND)..............................................................
Heated oxygen sensor (H02S)....................................
Idle air control (IAC)......................................................
Idle air control valve (IACV).........................................
Ignition control module (ICM).......................................
Intake air temperature (IAT).........................................
Manifold vacuum zone (MVZ)......................................
Mass air flow sensor (MAF).........................................
Open loop (OL)............................................................
Relay module (RM)......................................................
Solid state relay module (SSRM).................................
Three way catalytic converter (TWC)..........................
Throttle body (TB)........................................................
Throttle position sensor (TP)........................................
Transmission range (TR)..............................................
Wide open throttle (WOT)............................................OLD TERM (ACRONYM)
Throttle pedal (-)..........................................................
Air cleaner (-)...............................................................
Air conditioning (AC)....................................................
Battery plus, bat +, bat feed (B+).................................
Closed loop (-).............................................................
Closed throttle, idle position (-)....................................
Charcoal canister purge valve (-).................................
Serial link (-)................................................................
Fault code (-)...............................................................
Electronic ignition (-)....................................................
Electronic control unit (ECU)........................................
Coolant level (-)...........................................................
Coolant temperature (temp).........................................
Coolant temperature thermistor (-)..............................
Engine speed (rev/min)................................................
Evaporative loss system (ELC)...................................
Fuel temperature thermistor (-)....................................
Fourth gear, 3rd gear (-)..............................................
Fuel pump (-)...............................................................
Condenser fan timer (-)................................................
Alternator (-)................................................................
Ground, earth (B-)........................................................
Lambda (02) sensor (-)................................................
Idle speed control (ISC)................................................
Stepper motor (-).........................................................
Ignition module (-)........................................................
Intake temperature/ambient temperature (-)................
Manifold depression, vacuum (-).................................
Air flow meter (-)..........................................................
Fault code display unit (-)............................................
Open loop (-)...............................................................
Relay (-).......................................................................
Control unit (-)..............................................................
Catalyst, catalytic converter (CAT)..............................
Throttle housing (-)......................................................
Transmission gear (-)...................................................
Full throttle, wide open throttle (WOT).........................
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10 - MAINTENANCE
CONTENTS
Page
MAINTENANCE
UNDERBONNET VIEW - Td5 1..............................................................................
SEATS AND SEAT BELTS 2..................................................................................
LAMPS, HORNS AND WARNING INDICATORS 2................................................
WIPERS AND WASHERS 3...................................................................................
HANDBRAKE 3.......................................................................................................
BATTERY CONDITION - Td5 4..............................................................................
HANDSET BATTERY 5...........................................................................................
HEADLAMP ALIGNMENT 5....................................................................................
ROAD WHEELS 6...................................................................................................
TYRE PRESSURES, CONDITION AND TREAD DEPTH 6....................................
BRAKE PADS, CALIPERS AND DISCS 7..............................................................
ROAD WHEEL SPEED SENSOR HARNESS - Td5 7............................................
FUEL FILTER ELEMENT 8.....................................................................................
FUEL FILTER SEDIMENTER - Td5 8.....................................................................
INTERCOOLER / COOLING SYSTEM 9................................................................
AMBIENT AIR PRESSURE (AAP) SENSOR - Td5 9..............................................
DOOR LOCKS AND HINGES 10............................................................................
ENGINE COOLANT 10...........................................................................................
BRAKE FLUID 11....................................................................................................
AIR FILTER ELEMENT AND DUMP VALVE 11.....................................................
AUXILIARY DRIVE BELT 12...................................................................................
PAS FLUID, CLUTCH FLUID AND SCREEN WASHER LEVELS 12.....................
STEERING BOX 13................................................................................................
ENGINE OIL 14.......................................................................................................
CENTRIFUGE ROTOR - Td5 14.............................................................................
FULL FLOW OIL FILTER 15...................................................................................
GEARBOX OIL 15...................................................................................................
TRANSFER BOX OIL 16.........................................................................................
FRONT AND REAR AXLE OIL 17..........................................................................
PROPELLER SHAFTS 18.......................................................................................
CLUTCH PIPES AND UNIONS 18..........................................................................
PAS PIPES AND UNIONS 19.................................................................................
ENGINE, GEARBOX, TRANSFER BOX AND AXLES 19.......................................
EXHAUST SYSTEM 20...........................................................................................
STEERING BOX AND SUSPENSION 20...............................................................
STEERING BALL JOINTS 21.................................................................................
SHOCK ABSORBERS 22.......................................................................................
TOWING BRACKET 22...........................................................................................
ENGINE AND TRANSMISSION MOUNTINGS 23..................................................
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MAINTENANCE
7
MAINTENANCE BRAKE PADS, CALIPERS AND DISCS
1.With front road wheels removed, check brake
pad thickness and ensure that both pads are
wearing evenly.
2.Check brake discs for signs of cracking,
excessive scoring or oil contamination.
NOTE: Any requirement to replace brake
pads or brake disc should be advised to
the customer as this will incur additional
labour and/or material cost and should not be
carried out without the authorisation of the
customer.
3.Check for any signs of brake fluid leakage from
caliper seals, hoses or unions.
4.Using brake cleaner, remove excessive deposits
of brake dust from pads, calipers and disc
shields.ROAD WHEEL SPEED SENSOR HARNESS - Td5
1.Check each sensor harness is correctly and
securely routed.
2.Inspect each harness for chafing or damage.
NOTE: Any requirement to replace a road
wheel speed sensor should be advised to
the customer as this will incur additional
labour and/or material cost and should not be
carried out without the authorisation of the
customer.
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MAINTENANCE
9
MAINTENANCE INTERCOOLER / COOLING SYSTEM
1.Visually check for any obstructions in the
radiator and intercooler matrix and remove
debris as necessary.
2.Visually check fan blades for damage.
3.Check cooling, intercooler and heating systems
for leaks, hoses and oil pipes for security and
condition.
4.Check accessible hose clips for tightness.
5.Check coolant level, top-up if necessary
Cooling System Top-Up
1.With engine cold, remove expansion tank filler
cap.
2.Top-up with recommended mixture of coolant
until level reaches mark on expansion tank.
3.Fit expansion tank filler cap.
Intercooler Flush
1.Remove intercooler.See FUEL SYSTEM,
Repair.
2.Flush intercooler element using Unicorn
Chemicals’C’Solve following the manufaturers
instructions.
3.Thoroughly dry intercooler ensuring that no trace
of solvent remains in the element.
4.Refit intercooler.See FUEL SYSTEM, Repair.AMBIENT AIR PRESSURE (AAP) SENSOR - Td5
1.Check ambient air pressure sensor for damage.
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ENGINE
25
DESCRIPTION AND OPERATION CYLINDER HEAD COMPONENTS
The cylinder head components are described below:
Cylinder head
The cylinder head is of aluminium construction. It is not possible to reface the cylinder head if it becomes worn or
damaged. An alloy camshaft carrier is bolted directly to the upper surface of the cylinder head. Two dowels are
included in the cylinder head upper face for correct location of the camshaft carrier.
The EU3 cylinder head has a single internal fuel rail for delivering fuel to the injectors and an external fuel pipe for
returning spill fuel back to the fuel connector block. Therefore, pre EU3 and EU3 cylinder heads are not
interchangeable.
CAUTION: The cylinder head incorporates drillings for the fuel injection system, any
contamination which enters these drillings could cause engine running problems or injector
failure. It is therefore, essential that absolute cleanliness is maintained when carrying out work on
the cylinder head.
The camshaft carrier and cylinder head assembly is attached to the cylinder block by twelve cylinder head
retaining bolts which pass through the camshaft carrier and the cylinder head to secure the assembly to the
cylinder block.
CAUTION: The valve heads, tips of the injectors and glow plugs protrude below the face of the
cylinder head and will be damaged if the cylinder head is stored face down.
The camshaft is located between the cylinder head and the camshaft carrier, and the bearing journals are line
bored between the two components to form a matched pair.
CAUTION: Always fit plugs to open connections to prevent contamination.
The valve guides and valve seat inserts are sintered components which are an interference fit to the cylinder
head. The cylinder head machining also provide the locations for the electronic unit injectors, glow plugs, hydraulic
lash adjusters, finger followers and low pressure fuel rail.
Cooling to the cylinder head is provided by coolant flow through a water jacket machined into the cylinder head.
Drillings through the block provide lubrication channels for pressurised oil supply to cylinder head components
such as the lash adjusters, finger followers, rocker arms and camshaft bearings.
A coolant outlet elbow is fitted to the front LH side of the cylinder head to allow flow of coolant from the cylinder
head back to the radiator. A metal gasket is used to seal the joint between the water outlet elbow and the cylinder
head. A coolant temperature sensor is located in a port in the side of the water outlet elbow for monitoring coolant
temperature.
A stub pipe is connected at the front RH side of the cylinder block above the timing cover which connects a pipe to
supply oil to the vacuum pump. The timing chain tensioner adjuster is screwed in a thread in the cylinder head at a
location on the front RH side of the engine below the oil feed port for the vacuum pump.
An access hole for the camshaft gear is included at the front of the cylinder head which is sealed with a plastic
plug and rubber’O’ring. A press-fit core plug for the chain chest is located on the front face of the cylinder head.
A press-fit core plug for the cylinder head water jacket is located at the rear of the cylinder head and a threaded
brass plug for the water jacket is located on the LH side of the cylinder head beneath the exhaust manifold
assembly.
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12ENGINE
26
DESCRIPTION AND OPERATION Fuel connector block
Type A - Non EU3 Models - Engine Serial No. Prefixes 10P to 14P
Type B - EU3 Models - Engine Serial No. Prefixes 15P to 19P
1.Fuel connector block assembly
2.Outlet stub pipe
3.Stub pipe - to fuel cooler4.Fuel temperature sensor
5.Fuel pressure regulator
6.Spill return fuel connection (EU3 models only)
A cast and machined aluminium alloy fuel connector block assembly is located at the rear RH side of the cylinder
head, attached by three flanged bolts. A metal gasket is used to seal the faces between the fuel connector block
and the cylinder head, which must be replaced every time the fuel connector block is removed.
CAUTION: The cylinder head incorporates drillings for the fuel injection system, any
contamination which enters these drillings could cause engine running problems or injector
failure. It is therefore, essential that absolute cleanliness is maintained when carrying out work on
the cylinder head.
CAUTION: The valve heads, tips of the injectors and glow plugs protrude below the face of the
cylinder head and will be damaged if the cylinder head is stored face down.
Camshaft carrier
The cast aluminium alloy camshaft carrier is bolted to the cylinder head by thirteen screws. The camshaft carrier
and cylinder head assembly is attached to the cylinder block by twelve cylinder head retaining bolts which pass
through the camshaft carrier and the cylinder head to secure the assembly to the cylinder block.
The carrier is machined together with the cylinder head to form a matched pair for carrying the camshaft.
Non-return valve
A non-return valve is located at the front, bottom LH side of the cylinder head. The non-return valve prevents oil
from draining from the lash adjusters and is an integral component within the cylinder head and is
non-serviceable.
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12ENGINE
6
REPAIR GASKET - CYLINDER HEAD
Service repair no - 12.29.02
Remove
NOTE: The following procedures cover
engines fitted with or without an EGR
cooler. The EGR cooler is bolted to the
front of the cylinder head.
1.Remove underbelly panel.See CHASSIS AND
BODY, Repair.
2.Drain cooling system.See COOLING
SYSTEM, Adjustment.
3.Remove camshaft cover gasket.See this
Section.
4.Remove cooling fan.See COOLING SYSTEM,
Repair.
5.Release clips and disconnect air flow meter from
air filter.
6.Disconnect multiplug from air flow meter.
7.Loosen clip and remove air inlet hose from
turbocharger.
8.Remove 3 bolts and remove exhaust manifold
heat shield.
9.Remove turbocharger oil feed banjo bolt and
discard sealing washers.
10.Remove 3 nuts, release turbocharger from
exhaust manifold, discard gasket and tie
turbocharger aside.
11.Remove 2 bolts securing engine harness to
camshaft carrier.
12.Disconnect fuel injector, coolant and compressor
sensors.
13.Disconnect 4 heater plug connectors.
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ENGINE
7
REPAIR
14.Disconnect MAP sensor multiplug from inlet
manifold.
15.Position engine harness clear of inlet manifold.
16.Disconnect vacuum hose from EGR valve.
17.Loosen clip screw and disconnect air intake
hose from EGR valve.
18.Release 3 clips and disconnect coolant hoses
from fuel cooler.
19.Disconnect fuel hoses, tank to fuel cooler and
connector block on cylinder head.
CAUTION: Plug the connections.
20.Disconnect fuel hose from fuel cooler and secure
to connector block on cylinder head. This is to
prevent contamination of the fuel injection
system.
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ENGINE
15
REPAIR
NOTE: Non EU3 model illustrated.
9.Disconnect fuel hoses, tank to fuel cooler and
connector block on cylinder head.
CAUTION: Plug the connections.
10.Disconnect fuel hose from fuel cooler and secure
to connector block on cylinder head. This to
prevent contamination of the fuel system.
11.Release servo vacuum pipe, remove 4 bolts and
remove fuel cooler.
12.Release servo vacuum pipe from engine rear
cover clips and vacuum pump.
NOTE: Non EU3 model illustrated.
13.Disconnect vacuum hose from EGR valve.
14.Release EGR vacuum hose from vacuum pipe.
15.Disconnect multiplug from condensor cooling
fan.
NOTE: Non EU3 model illustrated.
16.Disconnect multiplugs from EGR solenoid, inlet
manifold sensor and injector harness.
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12ENGINE
16
REPAIR
NOTE: Non EU3 model illustrated.
17.Disconnect multiplug from fuel temperature
sensor.
18.Disconnect multiplug from CKP sensor. Remove
bolt securing CKP sensor, remove sensor and
discard’O’ring.
CAUTION: If fitted:- Retain CKP sensor
spacer.
19.Disconnect 4 glow plug leads.
20.Remove nut securing alternator lead and
disconnect multiplug.
NOTE: Non EU3 model illustrated.
21.Remove 2 bolts securing engine harness to
camshaft carrier.
22.Disconnect A/C compressor and ECT sensor
multiplugs.
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