1999 LAND ROVER DEFENDER Workshop Manual

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EMISSION CONTROL
1
REPAIR VALVE - EGR - NON EU3 MODELS
Service repair no - 17.45.01
Remove
1.Disconnect battery negative lead.
2.Remove 3 bolts and remove engine acoustic
cover.
3.Remove cooling fan.See COOLING SYSTEM,
Repair.
4.Remove battery cover.
5.Disconnect battery negative lead.
6.Disconnect vacuum hose from EGR valve
7.Loosen clip screw and release air intake from
EGR valve.
8.Remove 4 bolts, release EGR valve from inlet
manifold and discard gasket.
9.Remove 2 bolts and release EGR valve clip from
cylinder head.
10.Remove and discard 2 Allen screws securing
EGR valve pipe to exhaust manifold.
11.Remove EGR valve assembly.
12.Remove clip and remove pipe from EGR valve.Refit
13.Clean EGR valve and mating face on pipe.
14.Position pipe to EGR valve, fit retaining clip and
finger tighten bolt.
15.Clean inlet manifold face.
16.Position EGR valve to inlet manifold using new
gasket and tighten bolts to10 Nm (7lbf.ft).
17.Position air intake hose and tighten clip screw.
18.Position EGR pipe bracket, fit bolts and finger
tighten.
19.Position EGR valve pipe to exhaust manifold and
finger tighten allen screws
20.Tighten EGR valve clip to5 Nm (3 lbf.ft).
21.Tighten EGR pipe bracket bolts to10 Nm (7
lbf.ft).
22.Tighten 2 Allen screws to10 Nm (7 lbf.ft).
23.Connect vacuum hose to EGR valve.
24.Fit cooling fan.See COOLING SYSTEM,
Repair.
25.Fit engine acoustic cover.
26.Reconnect battery negative lead.
27.Fit battery cover.
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17EMISSION CONTROL
2
REPAIR VALVE - EGR - EU3 MODELS
Service repair no - 17.45.01
Remove
1.Release turnbuckles and remove battery cover.
2.Disconnect battery earth lead.
3.Remove 3 bolts and remove engine acoustic
cover.
4.Remove cooling fan coupling.See COOLING
SYSTEM, Repair.
5.Disconnect vacuum hose(s) from EGR valve.
6.Loosen screw and disconnect air intake hose
from EGR valve.
7.Remove screw and remove clamp securing EGR
pipe to EGR valve.
8.Remove 4 bolts securing EGR valve, remove
valve and discard gasket.
9.Discard EGR pipe gasket.Refit
10.Clean EGR valve and mating faces.
11.Fit new gasket to EGR pipe.
12.Using new gasket, position EGR valve to inlet
manifold fit bolts and tighten to10 Nm (7 lbf.ft).
13.Fit EGR pipe clamp and tighten screw to6Nm
(4.4 lbf.ft).
14.Connect air intake hose to EGR valve and
tighten clip.
15.Connect vacuum hoses to EGR valve.
16.Fit cooling fan coupling.See COOLING
SYSTEM, Repair.
17.Fit engine acoustic cover and tighten bolts to10
Nm (7 lbf.ft).
18.Connect battery earth lead.
19.Fit battery cover and secure the fixings.
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EMISSION CONTROL
3
REPAIR INLET THROTTLE (ILT) MODULATOR
Service repair no - 17.45.03
Remove
1.Identify the fitted positions of the 3 vacuum
pipes, then disconnect from the ILT modulator
valve.
2.Disconnect multiplug from ILT modulator.
3.Remove 2 nuts securing modulator and remove
ILT modulator from its moutings.
Refit
4.Fit ILT modulator to its mountings, fit the nuts
and tighten to10 Nm (7 lbf.ft).
5.Connect vacuum pipes to the positions identified
during removal.
6.Connect multiplug to ILT modulator.SOLENOID - VALVE - EGR
Service repair no - 17.45.04
Remove
1.Disconnect vacuum pipes and multiplug from
EGR solenoid.
2.Remove 2 nuts and remove EGR solenoid.
Refit
3.Position EGR solenoid and tighten securing
nuts.
4.Connect vacuum hoses and multiplug.
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17EMISSION CONTROL
4
REPAIR
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18 - ENGINE MANAGEMENT SYSTEM
CONTENTS
Page
DESCRIPTION AND OPERATION
COMPONENT LOCATION 2...................................................................................
DESCRIPTION 5.....................................................................................................
ENGINE CONTROL MODULE (ECM) 6.................................................................
SENSOR - MASS AIR FLOW (MAF) 7....................................................................
SENSOR - AMBIENT AIR PRESSURE AND 8.......................................................
SENSOR - MANIFOLD ABSOLUTE PRESSURE 9................................................
SENSOR - ENGINE COOLANT TEMPERATURE 11.............................................
SENSOR - CRANKSHAFT SPEED AND 12...........................................................
SENSOR - THROTTLE POSITION (TP) 14............................................................
SENSOR - THROTTLE POSITION (TP) 15............................................................
ELECTRONIC UNIT INJECTOR (EUI) 18...............................................................
SENSOR - FUEL TEMPERATURE (FT) 20............................................................
RELAY - FUEL PUMP 21........................................................................................
RELAY - MAIN 21...................................................................................................
SWITCH - BRAKE PEDAL 22.................................................................................
SWITCH - CLUTCH PEDAL 22...............................................................................
MODULATOR - EXHAUST GAS REGULATOR (EGR) 23.....................................
WARNING LAMP - GLOW PLUG 23......................................................................
GLOW PLUGS 24...................................................................................................
TURBOCHARGER 26.............................................................................................
INTERCOOLER 27.................................................................................................
OPERATION 28......................................................................................................
REPAIR
ENGINE CONTROL MODULE (ECM) 1.................................................................
SENSOR - ENGINE COOLANT TEMPERATURE (ECT) 1....................................
SENSOR - CRANKSHAFT SPEED AND POSITION (CKP) 2................................
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ENGINE MANAGEMENT SYSTEM
1
DESCRIPTION AND OPERATION This page is intentionally left blank
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