2002 LAND ROVER DISCOVERY Workshop Manual

ENGINE MANAGEMENT SYSTEM - V8
18-2-80 REPAIRS
Throttle Body
$% 19.22.45
Remove
1.Loosen 3 clips securing air intake hose, release
air intake hose and position aside.
Note: Pre 03 MY air intake hose illustrated.
2.Disconnect throttle and cruise control cables
from throttle body. 3.Loosen clip securing breather hose and release
hose.
4.Disconnect multiplug from throttle body.
5.Position a container below the throttle body to
collect coolant spillage.
6.Loosen 2 clips securing coolant hoses to
throttle body and release hoses.
7.Remove 4 bolts securing throttle body to
plenum chamber.
8.Remove throttle body and discard gasket.
Refit
1.Clean plenum chamber and throttle body
mating faces.
2.Using a new gasket, position throttle body, fit
bolts and tighten to 9 Nm (7 lbf.ft).
3.Connect coolant hoses to throttle body and
secure clips.
4.Connect breather hose to throttle body and
secure clip.
M19 2576A
1

ENGINE MANAGEMENT SYSTEM - V8
REPAIRS 18-2-81
5.Connect multiplug to throttle body.
6.Connect throttle and cruise control cables.
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+ ENGINE MANAGEMENT SYSTEM
- V8, ADJUSTMENTS, Cable - cruise
control.
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+ ENGINE MANAGEMENT SYSTEM
- V8, ADJUSTMENTS, Cable - throttle.
7.Position air intake hose and secure clips.
8.Top-up cooling system.
Plenum chamber
$% 19.22.46
Remove
1.Remove upper manifold gasket.

+ MANIFOLDS AND EXHAUST
SYSTEMS - V8, REPAIRS, Gasket - inlet
manifold - upper - Without Secondary Air
Injection.
2.Remove 2 bolts securing throttle cable
abutment bracket and remove bracket.
3.Remove breather hose adaptor.
4.Remove 4 bolts securing plenum chamber to
upper manifold and remove plenum chamber.
5.Collect plenum chamber gaskets.
Refit
1.Clean plenum chamber and upper manifold
mating faces.
2.Using new gaskets, position plenum chamber
fit bolts and tighten to 22 Nm (16 lbf.ft).
3.Fit breather adaptor and tighten to 6 Nm (4.4
lbf.ft).
4.Position throttle cable abutment bracket, fit
bolts and tighten to 9 Nm (7 lbf.ft).
5.Fit upper manifold gasket.

+ MANIFOLDS AND EXHAUST
SYSTEMS - V8, REPAIRS, Gasket - inlet
manifold - upper - Without Secondary Air
Injection.

ENGINE MANAGEMENT SYSTEM - V8
18-2-82 REPAIRS
Sensor - throttle position (TP)
$% 19.22.49
Remove
1.Disconnect multiplug from TP sensor.
2.Remove 2 screws securing TP sensor to
throttle body.
3.Remove TP sensor and discard 'O' ring.
Refit
1.Clean TP sensor and throttle body mating
faces.
2.Using a new 'O' ring, position TP sensor. Fit
screws and tighten to 2.2 Nm (1.6 lbf.ft).
3.Connect multiplug to TP sensor.
Valve - idle air control (IACV)
$% 19.22.54
Remove
1.Disconnect multiplug from IACV.
2.Loosen 2 clips securing air hoses and release
hoses.
3.Remove 2 screws securing IACV to inlet
manifold.
4.Collect clamps and remove IACV.
Refit
1.Position IACV to inlet manifold, locate clamps,
fit screws and tighten to 8 Nm (6 lbf.ft).
2.Position air hoses to IACV and secure clips.
3.Connect multiplug to IACV.

ENGINE MANAGEMENT SYSTEM - V8
REPAIRS 18-2-83
Injectors
$% 19.60.12
Remove
1.Remove upper manifold.

+ MANIFOLDS AND EXHAUST
SYSTEMS - V8, REPAIRS, Gasket - inlet
manifold - upper - Without Secondary Air
Injection.
2.Carefully manoeuvre ignition coil assembly
from between inlet manifold and bulkhead.
3.Position absorbent cloth beneath fuel pipe to
catch spillage.
4.Disconnect fuel feed hose from fuel rail
CAUTION: Always fit plugs to open
connections to prevent contamination.
5.Release injector harness from fuel rail and
disconnect injector multiplugs. 6.Remove 4 bolts securing fuel rail to inlet
manifold.
7.Release injectors from inlet manifold and
remove fuel rail and injectors.
8.Release spring clips securing injectors to fuel
rail and remove fuel injectors.
9.Remove and discard 2 'O' rings from each
injector.
10.Fit protective caps to each end of injectors.
Refit
1.Clean injectors and recesses in fuel rail and
inlet manifold.
2.Lubricate new 'O' rings with silicone grease
and fit to each end of injectors.
3.Fit injectors to fuel rail and secure with spring
clips.
4.Position fuel rail assembly and push-fit each
injector into inlet manifold.

ENGINE MANAGEMENT SYSTEM - V8
18-2-84 REPAIRS
5.Fit bolts securing fuel rail to inlet manifold and
tighten to 9 Nm (7 lbf.ft).
6.Connect fuel feed hose to fuel rail.
7.Connect injector harness multiplugs and
secure to fuel rail.
8.Carefully position ignition coil assembly
between inlet manifold and bulkhead.
9.Fit upper manifold.

+ MANIFOLDS AND EXHAUST
SYSTEMS - V8, REPAIRS, Gasket - inlet
manifold - upper - Without Secondary Air
Injection.
Actuator - cruise control
$% 19.75.05
Remove
1.Release clip and disconnect inner cable from
actuator.
2.Release outer cable from actuator mounting
bracket.
3.Release vacuum hose from actuator.
4.Remove nut, and remove actuator from
mounting bracket.
Refit
1.Position actuator and tighten retaining nut.
2.Connect vacuum hose to actuator.
3.Connect outer cable to mounting bracket.
4.Connect inner cable to actuator.

ENGINE MANAGEMENT SYSTEM - V8
REPAIRS 18-2-85
Vacuum control unit - up to 03MY
$% 19.75.06
Remove
1.Disconnect vacuum hose from actuator.
2.Disconnect multiplug from vacuum control unit.
3.Release 3 rubber mountings securing control
unit, and remove from mounting bracket.
4.Remove vacuum hose from control unit.
Refit
1.Position vacuum hose to control unit.
2.Position control unit and secure mountings.
3.Connect multiplug and vacuum hose.
Vacuum control unit - from 03MY
$% 19.75.06
Remove
1. If fitted: Remove 2 nuts securing heat shield
and remove heat shield.
2.Disconnect vacuum hose from actuator.

ENGINE MANAGEMENT SYSTEM - V8
18-2-86 REPAIRS
3.Disconnect multiplug from control unit.
4.Release 3 rubber mounting securing control
unit to mounting bracket and remove control
unit.
Refit
1.Position control unit and secure mountings.
2.Connect multiplug and vacuum hose.
3. If fitted: Fit heat shield, fit nuts and tighten to
10 Nm (7 lbf.ft).
Cable - cruise control
$% 19.75.10
Remove
1.Release clip and disconnect inner cable from
actuator.
2.Release outer cable from actuator mounting
bracket.
3.Loosen cable locknuts, release outer cable
from abutment bracket and retaining clip.
4.Release inner cable from operating lever and
remove cable.
Refit
1.Position cable and connect to operating lever.
2.Position cable to abutment bracket.
3.Position outer cable to actuator mounting
bracket and connect inner cable to actuator.
4.Adjust cruise control cable.

+ ENGINE MANAGEMENT SYSTEM -
V8, ADJUSTMENTS, Cable - cruise control.

ENGINE MANAGEMENT SYSTEM - V8
REPAIRS 18-2-87
Switch - cruise control (on/off)
$% 19.75.30
Remove
1.Carefully remove switch from instrument cowl.
2.Disconnect multiplug and remove switch.
Refit
1.Position new switch and connect multiplug.
2.Carefully push switch into instrument cowl.
Switch - cruise control (set/resume)
$% 19.75.33
Remove
1.Remove the key from the starter switch.
Disconnect both battery leads, negative lead
first. Wait ten minutes before starting work.
2.Remove driver's airbag module.

+ RESTRAINT SYSTEMS, REPAIRS,
Airbag module - drivers.
3.Release remote control switches multiplug and
leads from steering wheel base.
4.Disconnect remote control switches multiplug
from harness.
5.Remove 2 screws securing remote control
switches to steering wheel base.
6.Release and remove remote control switches
from steering wheel.
Refit
1.Fit remote control switches to steering wheel
and secure with screws.
2.Connect remote control switches multiplug to
harness.
3.Secure leads and multiplug to base of steering
wheel.
4.Fit driver's airbag module.

+ RESTRAINT SYSTEMS, REPAIRS,
Airbag module - drivers.