Defender 90 NAS. Manual - part 22

SFI

ADJUSTMENT

ENGINE TUNING

Service repair no - 19.22.13

The position of the Idle Air Control (IAC) valve can be
checked using TestBook and adjusted if necessary
through the by-pass screw in the plenum chamber.
The bypass screw is covered by a tamper proof plug
which can be extracted using a self tapping screw.

All vehicles:

1. Ensure air conditioning and all electical loads are

off. Vehicle must be in neutral or park.

2. Carry out tuning or base idle setting procedure

as applicable using TestBook.

FUEL SYSTEM DEPRESSURISE

Service repair no - 19.50.02

WARNING: Fuel pressure of up to 2.5 bar
will be present in the system, even if the
engine has not been run for some time.

Always depressurise the system before
disconnecting any components in the fuel feed
line (between fuel pump and pressure regulator).
The spilling of fuel is unavoidable during this
operation. Ensure that all precautions are taken to
prevent fire and explosion.

NOTE: Fuel pressure can be relieved at
fuel rail feed union or fuel filter unions.

1. Position cloth around relevant union to protect

against fuel spray.

2. Carefully loosen union.
3. Tighten union to correct torque once pressure is

relieved.

FUEL TANK DRAIN

Service repair no - 19.55.02

WARNING: Ensure that Fuel Handling
Precautions given in Section 01 -
Introduction are strictly adhered to when

carrying out following instructions.

CAUTION: Before disconnecting any part
of the fuel system, it is imperative that all
dust, dirt and debris is removed from

around components to prevent ingress of foreign
matter into fuel system.

1. Disconnect battery negative lead.
2. Remove fuel filler cap.
3. Using a fuel bowser with an 18 mm, 0.75 in

outside diameter hose, pass hose into tank
through filler neck.

NOTE: Because the fuel tank filler stub
houses a restrictor, repeated attempts may
be necessary to enter the hose into the

fuel tank. Follow the fuel bowser manufacturers
instructions for safe use of bowser.

4. Siphon fuel from fuel tank.
5. Fit filler cap.

SFI

REPAIR

IGNITION COILS - SET

Service repair no - 18.20.45

Remove

1. Disconnect battery negative lead.

2. Noting their fitted positions, disconnect 8 h.t.

leads from ignition coils.

3. Move leads aside.
4. Disconnect coil multiplug and release from

mounting bracket.

5. Remove 4 nuts securing coil mounting bracket to

engine.

6. Remove coils and mounting bracket assembly.

Do not carry out further dismantling if
component is removed for access only.

7. Remove terminal cover and note lead positions.
8. Remove 2 nuts securing leads to coil terminals.
9. Remove leads from terminals.

10. Remove 3 Torx screws securing ignition coil to

mounting bracket.

11. Remove ignition coil.

12. Fit ignition coil to mounting bracket and secure

with screws.

13. Fit leads to terminals and secure with nuts.

Refit

14. Position coils and mounting bracket assembly to

engine.

15. Fit and tighten nuts securing mounting bracket to

engine to

8 Nm, 6 lbf ft.

16. Connect coil multiplug and secure to mounting

bracket.

17. Connect h.t. leads to ignition coils.
18. Reconnect battery negative lead.

FUEL SYSTEM

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

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.

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