Land Rover Defender 90 Workshop 2nd Edition Nas Rover Manual

							19FUEL SYSTEM
2
REPAIR ELECTRONIC CONTROL MODULE (ECM)
Service repair no - 18.30.01
Remove
1.Remove 2 screws securing ECM cover.
2.Remove cover.
3.Disconnect 3 multiplugs from ECM.
4.Remove 2 screws securing ECM.
5.Release ECM from 2 lower retainers.
6.Remove ECM.
Refit
7.Position ECM and secure to lower retainers.
8.Fit and tighten screws securing ECM.
9.Connect multiplugs.
10.Fit cover and secure with screws.INTAKE AIR TEMPERATURE (IAT) SENSOR
Service repair no - 18.30.09
Remove
1.Disconnect multiplug from IAT sensor.
2.Remove IAT sensor from air filter housing.
Refit
3.Clean sensor and mating face on filter housing.
4.Fit sensor and tighten to
8 Nm, 6 lbf ft.
5.Connect multiplug. 
						

							SFI
3
REPAIR ENGINE COOLANT TEMPERATURE (ECT)
SENSOR
Service repair no - 18.30.10
Remove
1.Disconnect battery negative lead.
2.Depress spring clip and disconnect ECT sensor
multiplug.
3.Position cloth around ECT sensor to absorb
coolant spillage.
4.Remove ECT sensor.
5.Remove sealing washer and discard.
Refit
6.Clean sealing washer, sensor threads and
sensor location.
7.Coat sensor threads with Loctite 577 and fit new
sealing washer.
8.Fit ECT sensor and tighten to
20 Nm, 15 lbf ft.
9.Connect multiplug to ECT sensor.
10.Top up cooling system.
11.Run engine to normal operating temperature.
Check for leaks around ECT sensor.
12.Reconnect battery negative lead.CRANKSHAFT POSITION (CKP) SENSOR
Service repair no - 18.30.12
Remove
1.Disconnect battery negative lead.
2.Raise vehicle on ramp [hoist].
3.Remove 2 bolts securing sensor shield to engine
backplate.
4.Release sensor shield.
5.Remove sensor shield.
6.Disconnect multiplug and remove sensor.
7.Remove spacer from sensor.
CAUTION: All vehicles have a spacer fitted
to the sensor. Ensure spacer is correctly
refitted.
Refit
8.Clean mating faces of sensor and engine
backplate.
9.Fit spacer to sensor.
10.Position sensor and connect multiplug.
11.Position shield to sensor and align to engine
backplate.
12.Fit bolts and tighten to
6 Nm, 4 lbf ft.
13.Lower vehicle.
14.Reconnect battery negative lead. 
						

							19FUEL SYSTEM
4
REPAIR CAMSHAFT POSITION (CMP) SENSOR
Service repair no - 18.30.24
Remove
1.Disconnect battery negative lead.
2.Release sensor multiplug from clip and
disconnect multiplug.
3.Remove bolt securing sensor to front cover.
4.Remove sensor.
5.Remove and discard O ring.
Refit
6.Clean sensor and mating face on front cover.
7.Lubricate and fit O ring to sensor.
8.Fit sensor, fit bolt and tighten to
8 Nm, 6lbf ft.
9.Connect sensor multiplug and secure to bracket.
10.Reconnect battery negative lead.KNOCK SENSOR - LH
Service repair no - 18.30.28
CAUTION: Due to the sensitivity of the
sensor, do not apply tape or sealant to
sensor threads.
Remove
1.Raise vehicle on ramp [hoist].
2.Depress spring clip and disconnect multiplug
from LH knock sensor.
3.Remove sensor from engine.
Refit
4.Clean mating faces of sensor and engine.
5.Fit sensor and tighten to
16 Nm, 22 lbf ft.
CAUTION: Failure to tighten sensor to
correct torque will result in malfunction or
sensor damage.
6.Connect multiplug to sensor.
7.Lower vehicle. 
						

							SFI
5
REPAIR KNOCK SENSOR - RH
Service repair no - 18.30.30
CAUTION: Due to the sensitivity of the
sensor, do not apply tape or sealant to
sensor threads.
Remove
1.Raise vehicle on ramp [hoist].
2.Remove bolt securing starter motor heat shield
to engine RH mounting.
3.Release heat shield clip from starter solenoid.
4.Move heat shield aside to gain access to knock
sensor.
5.Depress spring clip and disconnect sensor
multiplug.
6.Remove sensor.
Refit
7.Clean sensor and mating face.
8.Fit sensor and tighten to
16 Nm, 12 lbf ft.
CAUTION: Failure to tighten sensor to
correct torque will result in malfunction or
sensor damage.
9.Connect multiplug to sensor.
10.Manoeuvre heat shield into position.
11.Secure heat shield clip to solenoid.
12.Align heat shield to mounting and secure with
bolt.
13.Lower vehicle. 
						

							19FUEL SYSTEM
6
REPAIR INERTIA FUEL SHUT OFF SWITCH
Service repair no - 19.22.09
Remove
1.Disconnect battery negative lead.
2.Disconnect multiplug from inertia fuel shut off
switch.
3.Remove 2 screws securing shut off switch to
mounting bracket.
4.Remove shut off switch.
Refit
5.Position fuel shut off switch to mounting bracket
and secure with screws.
6.Connect multiplug to inertia switch.
7.Reconnect battery negative lead.RELAY MODULE
Service repair no - 18.30.71
Remove
1.Remove 2 screws securing ECM cover.
2.Remove cover.
3.Remove 2 screws securing ECM.
4.Release ECM from 2 lower retainers and move
aside for access to relay module.
5.Release relay module from bracket.
6.Disconnect 2 multiplugs from module.
7.Remove relay module. 
						

							SFI
7
REPAIR Refit
8.Position relay module
9.Connect multiplugs and secure module to
bracket.
10.Position ECM and secure to lower retainers.
11.Fit and tighten screws securing ECM.
12.Fit cover and tighten screws.AIR CLEANER
Service repair no - 19.10.01
Remove
1.Loosen clip securing intake hose to MAF sensor
and disconnect hose.
2.Disconnect multiplug from IAT sensor.
3.Release 2 toggle clips and release MAF sensor
from air cleaner.
4.Remove O ring and carefully place sensor
aside.
5.Remove 3 nuts securing air cleaner to mounting
rubbers.
6.Remove air cleaner assembly.
Do not carry out further dismantling if component
is removed for access only.
7.Remove IAT sensor.
Refit
8.Clean threads of IAT sensor and fit sensor to air
cleaner.
9.Position air cleaner to mountings and fit and
tighten nuts.
10.Clean MAF sensor and mating face.
11.Fit NEW O ring, fit sensor and secure toggle
clips.
12.Connect multiplug to IAT sensor.
13.Connect air intake hose and tighten clip. 
						

							19FUEL SYSTEM
8
REPAIR AIR CLEANER ELEMENT
Service repair no - 19.10.10
Remove
1.Release 3 toggle clips and remove inlet tube.
2.Remove nut and end plate retaining air cleaner
element.
3.Remove air cleaner element and discard.
Refit
1.Clean inlet tube and inside of air cleaner.
2.Squeeze open dump valve fitted at base of air
cleaner and check that rubber is flexible and in
good condition. Replace if necessary.
3.Fit new air cleaner element.
4.Fit retaining plate and fit and tighten nut.
5.Fit intake tube and secure toggle clips.THROTTLE CABLE
Service repair no - 19.20.06
Remove
1.Remove split pin and clevis pin securing cable to
throttle lever.
2.Release cable adjusting nut from abutment
bracket.
3.Remove split pin and clevis pin securing cable to
throttle pedal.
4.Release cable from bulkhead and remove cable. 
						

							SFI
9
REPAIR Refit
5.Clean area around cable hole in bulkhead.
6.Position cable and secure to bulkhead.
7.Clean and lubricate clevis pin.
8.Align inner cable to throttle pedal, fit clevis pin
and secure with NEW split pin.
9.Secure outer cable to abutment bracket.
10.Clean and lubricate clevis pin.
11.Adjust outer cable and align inner cable yoke to
throttle lever.
12.Fit clevis pin and secure with new split pin.
13.Adjust outer cable to give 1.6 mm, 0.06 inch of
free play in inner cable.
14.Check throttle operation.FUEL TEMPERATURE SENSOR
Service repair no - 19.22.08
Remove
NOTE: Because fuel leakage will not occur
when sensor is removed, it is not
necessary to depressurise the fuel system
for this operation.
1.Release and move brake servo vacuum pipe
aside for access to fuel temperature sensor.
2.Disconnect multiplug from fuel temperature
sensor.
3.Remove sensor.
Refit
4.Clean threads of sensor and mating face on fuel
rail,
5.Fit sensor and tighten to
17Nm, 13 lbf ft.
6.Connect multiplug and vacuum pipe. 
						

							19FUEL SYSTEM
10
REPAIR HEATED OXYGEN SENSOR (HO2S) - FRONT
Service repair no - 19.22.16
Remove
CAUTION: The sensor must only be
removed when the exhaust pipe is cold.
1.Position vehicle on ramp [hoist].
2.Remove clip securing oxygen sensor lead to
harness.
3.Release sensor multiplug from bracket behind
cylinder head.
4.Disconnect multiplug.
5.Raise ramp [hoist].
6.Remove sensor using toolLRT-12-047.
CAUTION: Although robust within the
vehicle enviroment, HO2 sensors are
easily damaged by dropping, excessive
heat and contamination. Care must be exercised
when working on the exhaust system not to
damage the sensor housing or tip.
7.Remove and discard sealing washer.
Refit
8.Clean sensor mating face on exhaust pipe.
NOTE: The new sensor thread is
pre-treated with an anti-seize compound. If
refitting old sensor, fit NEW sealing
washer and apply anti-seize compound to threads.
CAUTION: Do not allow anti-seize
compound to come into contact with the
sensor nose or enter the exhaust system.
9.Fit sealing washer to sensor and fit sensor.
Tighten sensor to
20 Nm, 15 lbf ft.
10.Lower ramp [hoist].
11.Connect multiplug and secure to bracket.
12.Secure lead to harness with clip. 
						

							SFI
11
REPAIR HEATED OXYGEN SENSOR (HO2S) - REAR
Service repair no - 19.22.17
Remove
CAUTION: The sensor must only be
removed when the exhaust pipe is cold.
1.Position vehicle on ramp [hoist].
2.Release sensor multiplug from bracket.
3.Disconnect multiplug.
4.Raise ramp [hoist].
5.Remove sensor using toolLRT-12-047.
6.Remove and discard sealing washer.Refit
7.Clean sensor mating face on exhaust pipe.
NOTE: The new sensor thread is
pre-treated with an anti-seize compound. If
refitting old sensor, fit NEW sealing
washer and apply anti-seize compound to threads.
CAUTION: Do not allow anti-seize
compound to come into contact with the
sensor nose or enter the exhaust system.
8.Fit sealing washer to sensor and fit sensor.
Tighten sensor to
20 Nm, 15 lbf ft.
9.Connect multiplug and secure to bracket.
10.Lower ramp [hoist].